EP0586409B1 - Telescopic tubular splined assembly - Google Patents

Telescopic tubular splined assembly Download PDF

Info

Publication number
EP0586409B1
EP0586409B1 EP92909620A EP92909620A EP0586409B1 EP 0586409 B1 EP0586409 B1 EP 0586409B1 EP 92909620 A EP92909620 A EP 92909620A EP 92909620 A EP92909620 A EP 92909620A EP 0586409 B1 EP0586409 B1 EP 0586409B1
Authority
EP
European Patent Office
Prior art keywords
tubular section
actuator member
tubular
section
assembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92909620A
Other languages
German (de)
French (fr)
Other versions
EP0586409A1 (en
Inventor
Ludger Simond
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIMOND Ludger
Original Assignee
SIMOND Ludger
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SIMOND Ludger filed Critical SIMOND Ludger
Publication of EP0586409A1 publication Critical patent/EP0586409A1/en
Application granted granted Critical
Publication of EP0586409B1 publication Critical patent/EP0586409B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C11/00—Accessories for skiing or snowboarding
    • A63C11/22—Ski-sticks
    • A63C11/221—Ski-sticks telescopic, e.g. for varying the length or for damping shocks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32467—Telescoping members
    • Y10T403/32475—Telescoping members having detent
    • Y10T403/32501—Cam or wedge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32532—Clamped members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/40—Radially spaced members joined by independent coupling
    • Y10T403/405—Flexible intermediate member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/57—Distinct end coupler
    • Y10T403/5793—Distinct end coupler including member wedging or camming means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7047—Radially interposed shim or bushing
    • Y10T403/7051—Wedging or camming
    • Y10T403/7052—Engaged by axial movement
    • Y10T403/7056—Threaded actuator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7098—Non-circular rod section is joint component

Definitions

  • the present invention relates to telescopic tubular assemblies, such as, for example but not limited to, the poles used for ski touring or mountaineering, comprising several successive tubular sections and sliding in each other between a retracted position and a position deployed.
  • These telescopic poles are used to adjust the length of the pole according to the slope of the terrain on which the user is moving.
  • the stick is intended to support an axial force. Consequently, selective locking means must allow the sections to be axially blocked in relation to the others, either in the deployed position, in the retracted position, or in all intermediate positions.
  • an axial end piece is fixed as an extension of a first tubular section of small diameter.
  • the nozzle generally has a conical bearing and a threaded part.
  • An expandable locking ring is mounted to slide axially in the tubular section of large diameter, and has a generally conical inner bearing bearing against the conical bearing of the axial end piece.
  • An actuator means such as a nut is adapted to slide axially in the tubular section of large diameter and be locked in rotation in this tubular section, the actuator means screwing onto the threaded part of the axial end piece to axially tighten and loosen the ring by relative rotation of the tubular sections.
  • the actuator means is constituted by the locking ring itself, which rubs against the inner wall of the large diameter tube.
  • the blocking in rotation of the ring turns out to be random.
  • the actuator means also consists of the ring itself, which is locked in rotation in the large diameter tube by a longitudinal rib projecting from the inside of the tube and coming lodge in a longitudinal groove in the ring.
  • the inner rib of the large-diameter tube constitutes a hindrance in guiding and sliding the small diameter tube inside the large diameter tube. There is then poor guidance between the two tubes, which are not concentric. During bending efforts on the stick, the inner rib deforms the tube of small diameter and deteriorates it.
  • the actuating means is also the locking ring itself, which can slide in the large diameter tube and is locked in rotation in this tube by two diametrically opposed ribs in the ring and fitting into two grooves in the inside of the large diameter tube.
  • Outer ribs protrude from the outer surface of the large diameter tube, in correspondence with the inner grooves.
  • Such an arrangement may be suitable for a stick having only two sections.
  • the outer ribs of the large diameter tube would prevent the adaptation and correct maintenance of a third tube over this large diameter tube.
  • Document US-A-4 238 164 describes a two-tube structure, in which the actuating means is the locking ring, which can slide in the large-diameter tube and is locked in rotation in this tube by three convex internal ribs of the large diameter tube engaged in three concave longitudinal grooves of the ring.
  • the small diameter tube is a smooth cylinder of revolution.
  • the problem proposed by the present invention is to design a new locking structure which ensures both good guidance of the tubes relative to each other, without subjecting the locking ring to undue mechanical stress, the structure being further compatible with the presence of three or more of three successive tubes.
  • the inner ribs of the larger diameter tube, forming grooves therefore constitute both means for blocking the rotation of the first actuator element, and suitable means for guiding and holding the smaller diameter tube during sliding in the larger diameter tube.
  • the fluted tubular structure thus obtained is particularly rigid, without any increase in weight.
  • the telescopic tubular assembly according to the present invention is a stick comprising three successive sections, namely a first tubular section 1 of larger diameter, a second tubular section 2 of smaller diameter, and a third tubular section 3 of even smaller diameter.
  • the second section 2 is slidably mounted in the first section 1.
  • the third section 3 is slidably mounted in the second section 2.
  • a portion of the second section 2 remains permanently inside the first section 1, and it includes a inner end 4.
  • the first tubular section 1 of larger diameter has a cylindrical inner surface 5 of generally circular section, comprising at least three longitudinal ribs 6, 13 and 14 occupying all or most of its length, and of low height.
  • the second tubular section 2 of smaller diameter has a cylindrical outer surface 60, of generally circular section, shaped to slide axially in the interior space limited by the interior surface 5 and the longitudinal ribs 6, 13 and 14 of the first section tubular 1 of large diameter.
  • the inner surface 5 of the first tubular section 1 has three longitudinal ribs 6, 13 and 14 regularly distributed around the periphery of the section.
  • the three longitudinal ribs 6, 13 and 14 engage in three respective corresponding grooves 15, 16 and 17 of the locking ring 10.
  • the ribs 6, 13 and 14 are formed by driving in the wall of the tube forming the first tubular section 1, the depression simultaneously producing the longitudinal external grooves 18, 19 and 20.
  • the longitudinal external grooves 18, 19 and 20 have a width slightly smaller than the corresponding internal ribs 6, 13 and 14.
  • the ribs 6, 13 and 14 must form the bearing surface on which the inner tubular section slides or pivots 2. This bearing surface must be able to withstand the mechanical stresses bending that you want to apply between two successive sections of a telescopic stick. For this, as shown in the figures, the ribs 6, 13 and 14 have a wide and rounded ridge surface, to match a significant part of the periphery of the outer surface of the second tubular section. The ribs 6, 13 and 14 are shaped to come into abutment with little play and simultaneously against the external surface of the second tubular section 2.
  • the second tubular section 2 also includes ribs and grooves similar to those of the first tubular section.
  • its outer grooves 21, 22 and 23 are narrower than the inner ribs 6, 13 and 14 of the first tubular section 1.
  • the inner ribs 6 , 13 and 14 of the first tubular section cannot engage in the corresponding external grooves 21, 22 and 23 of the second tubular section, which can thus freely pivot axially in the first tubular section 1.
  • the second tubular section 2 carries, as an extension of its internal end 4, an axial end piece 7 having a generally conical surface 8 extended by a threaded part 9, for example of smaller diameter .
  • a threaded locking ring 10 is screwed onto the threaded part 9 of the axial end piece 7, and it comprises a generally cylindrical outer surface 11 shaped to slide axially with little play in the first tubular section 1 and to be locked in rotation by the inner ribs 6, 13 and 14 of the first tubular section 1.
  • the locking ring 10 comprises an end zone 12 which is elastically deformable in the radial direction, and oriented axially so as to bear on the conical bearing 8.
  • the locking ring 10 comprises a central bore 37 threaded, to cooperate with the threading of the threaded part 9, and a first generally conical bearing 39 to cooperate with the conical bearing 8.
  • the length of the locking ring 10 is slightly less than the length of the threaded part 9.
  • the free end 24 of the threaded part 9 comprises an enlarged part, of diameter greater than the diameter inside of the locking ring 10 to form a stop limiting the stroke of the ring away from the conical bearing 8.
  • the locking ring 10 comprises, in its end region 12, longitudinal slots such as the slot 25, to increase the flexibility of this end region. Radial deformations of the end zone 12 are thus favored by the effect of the conical bearing 8 at the end of the screwing of the locking ring 10 on the threaded part 9.
  • the ring 10 constitutes the expandable element and the first actuator element, while the end piece 7 constitutes the second actuator element.
  • the endpiece 7 is an attached endpiece, forcibly engaged in the interior end 4 of the second tubular section 2.
  • a sealing ring 26 is fitted on the covering end 27 of the first tubular section 1, to which it is secured axially.
  • the sealing ring 26 comprises an inner rim 28 which engages in an external annular groove 29 of the first tubular section 1.
  • the end face 30 of the sealing ring 26 comprises an opening 31, the opening of which section corresponds to the outside section of the second tubular section 2, so as to slide with little play on the outside surface of the second tubular section 2.
  • a stop limits the movement of the locking ring 10 to the deployed position of the stick.
  • the stop is produced by a groove 32 or a punching on the surface of the first tubular section 1, producing a lug protruding from the interior face of the first tubular section 1 and against which the end region 12 of the ring comes to bear. lock 10.
  • FIGS. 1 and 2 Another embodiment of abutment is shown in FIGS. 1 and 2, in the form of one or more tongues 33, integral with the sealing ring 26, and coming to be housed in the space formed by the outer groove 22 of the second tubular section 2.
  • the tongue 33 comes to bear, at the end of its travel, against the end region 12 of the locking ring 10.
  • a similar locking structure is provided, as shown in FIG. 2, between the second tubular section 2 and the third tubular section 3.
  • the operation of the device is as follows: in the position shown in FIG. 1, the locking ring 10 is away from the conical bearing 8. In this position, the locking ring 10 slides freely, without significant friction, in the first tubular section 1. As a result, the second tubular section 2, which is axially integral with the locking ring 10 and the end piece 7, slides freely in the first tubular section 1. To obtain the locking of the successive sections the relative to each other, when the desired length of the stick has been obtained by axial sliding, the user causes a relative rotation of the second tubular section 2 in the first tubular section 1. During the rotation of the second tubular section 2, the ring locking 10 remains integral in rotation with the first tubular section 1, and is therefore screwed onto the threaded part 9, when the rotation is in the direction of screwing.
  • the locking ring 10 comes to bear against the conical bearing 8, which causes the flaring of the end zone 12.
  • This end zone 12 comes to bear against the internal surface 5 of the first tubular section 1 , ensuring high friction preventing any subsequent axial sliding of the tubular sections into one another.
  • a similar locking is obtained by relative rotation of the third tubular section 3 in the second tubular section 2.
  • the sliding of the successive sections into one another is limited, in the direction of the separation of the sections from one another, by the stops such as the groove 32 or the tongue 33 coming to bear against the end zone 12 of the locking ring 10.
  • the expandable member is a locking ring 10.
  • the actuator member comprises a first actuator element consisting of a nut 35 which is screwed onto the threaded part 9 of the axial end piece 7 forming the second actuator element.
  • the nut 35 is shaped to slide axially in an axial passage 36 of the ring 10 while being locked in rotation relative to said ring 10.
  • the nut 35 advantageously comprises a prismatic outer surface, for example in hexagon , the axial passage 36 having a corresponding hexagonal section, as illustrated in FIG. 8.
  • the ring 10 has, on its external surface, longitudinal locking grooves receiving the corresponding internal ribs of the first tubular section 1, as in the embodiment of Figures 1 and 2.
  • the nut 35 is locked in rotation in the first tubular section 1 indirectly via the ring 10, and it bears against an end surface of the ring 10, namely the bottom of the axial passage 36.
  • the ring 10 comprises a central part 37 whose axial hole is substantially cylindrical, and two end parts 38 and 139 whose axial hole is of larger diameter and is connected to the central part hole 37 by a first generally conical bearing 39 and a second generally conical bearing 40.
  • the first generally conical bearing 39 bears on the corresponding conical bearing 8 of the axial end piece 7.
  • the second generally conical bearing 40 of the ring 10 bears against a corresponding conical bearing 41 of the nut 35.
  • the first conical bearing surface 39 of the ring 10 is associated with a first series of slots such as the slot 25.
  • the second conical bearing surface 40 of the ring 10 is associated with a second series of longitudinal slots such as the slots 42 and 43, also allowing the radial expansion of the ring 10.
  • the slots 25 of the first series of slots are nested relative to the slots 42 and 43 of the second series of slots.
  • the conical surfaces 39 and 40 of the ring 10 are arranged substantially at one third and two thirds of the length of the ring. This results in a significant increase in the area of friction of the ring on the internal face of the first tubular section 1.
  • Figures 13 to 18 illustrate six embodiments, shown schematically in longitudinal section, only the elements involved in the locking being shown.
  • the expandable element is a locking ring 10, generally cylindrical, provided with an axial bore.
  • the ring 10 is made of elastomer, and it slides with little play in the first tubular section 1.
  • the actuator member comprises a first actuator element constituted by a nut 35, and comprises a second actuator element constituted by the end piece 7, fixed in the second tubular section 2.
  • the nut 35 has the locking grooves, not shown in the figure, which receive the locking ribs 6, 13, 14 of the first tubular section 1. The nut 35 bears against a surface of end of the ring 10.
  • the elastomer ring 10 is pressed axially between the nut 35 and the base of the axial end piece 7, when the nut 35 is screwed onto the threaded part of the axial end piece 7, causing the 'radial expansion of the ring 10 and the locking of the tubular elements 1 and 2 relative to each other.
  • the expandable locking element formed by the ring 10 is similar to that of FIG. 13, and is pressed axially by the actuating member also in a similar manner.
  • the actuator member comprises a first actuator element consisting of a screw 135, the head 136 of which has on its outer surface the locking grooves receiving the locking ribs 6, 13, 14 of the first tubular element 1.
  • the rod 137 is screwed into a threaded bore of the second actuator element 107.
  • the ring 10 may have a smooth peripheral surface, devoid of longitudinal grooves.
  • the expansible locking element is a locking ring with a smooth internal bore and the external surface of which comprises the longitudinal longitudinal locking grooves receiving the internal locking ribs 6, 13, 14 of the first tubular element 1.
  • the actuator member has a structure similar to that of the embodiment of FIG. 6, with a first actuator element 35 formed from a nut hexagon sliding axially in a corresponding axial passage 36 of the ring 10, and with a nozzle 7 forming the second actuator element.
  • the nut 35 is screwed onto a threaded part 9 of the end piece.
  • the nut 35 is integral in rotation with the ring 10 which is itself integral in rotation with the first tubular element 1.
  • the actuator member comprises a screw 235 whose hexagon head 236 is housed in a corresponding housing of the ring 10, and whose rod 237 is screwed into a threaded bore of the end piece 207 forming the second actuator element.
  • FIG. 17 illustrates an embodiment in which the ring 10 itself forms the first actuator element, and comprises a head provided with locking grooves, and a threaded rod 100 screwing into a corresponding tapped bore of a nozzle 307 forming the second actuator element.
  • the tip 307 has a generally conical bearing 308 cooperating with a generally conical inner bearing 309 of the ring 10, to cause its expansion.
  • FIG. 18 illustrates an embodiment similar to that of FIG. 13, in which the ring 10 has, in the vicinity of its two axial ends, tapered inner bearing surfaces to cooperate with corresponding generally tapered outer bearing surfaces of the nut 35 and tip 7.
  • a further increased locking efficiency can be obtained by using an elastomer locking ring, and by using an actuating member which acts on said ring simultaneously by exerting axial compression against its two end faces, and by exerting a radial thrust towards the outside on the inside face of its axial bore, by corresponding generally conical surfaces. It is thus possible to distribute in a more appropriate and regular manner the radial deformations of the ring, which is applied very effectively on the inner face of the first tubular element. Such an action can for example be carried out in the embodiment of FIG. 18.
  • a sealing ring 26 is fitted around the end of the first tubular section 1 of large diameter.
  • the ring 26 can rotate axially relative to the first tubular section 1, as in the embodiment of FIGS. 1 and 2.
  • the seal is provided by a sealing ring 45, adapted around the end of the first tubular section 1 of large diameter on which it is secured in rotation and in translation.
  • the ring 45 has a return 46 from covering a splined annular spacer 47 inserted between the return 46 of said ring 45 and the edge of the first section 1 of large diameter.
  • the spacer 47 can slide on the second section 2 of small diameter with respect to which it is locked in rotation by the engagement of its internal splines with the external splines of the second tubular section 2, thus ensuring good sealing.

Landscapes

  • Mutual Connection Of Rods And Tubes (AREA)
  • Particle Accelerators (AREA)
  • Joints Allowing Movement (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)
  • Pens And Brushes (AREA)
  • Switches With Compound Operations (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

PCT No. PCT/FR92/00328 Sec. 371 Date Jan. 24, 1994 Sec. 102(e) Date Jan. 24, 1994 PCT Filed Apr. 14, 1992 PCT Pub. No. WO92/20413 PCT Pub. Date Nov. 26, 1992.The present invention concerns telescopic tubular assemblies comprising a plurality of successive tubular sections sliding one inside the other between a retracted position and a deployed position. One non-limiting example of such assemblies is a ski stick.

Description

La présente invention concerne les ensembles tubulaires télescopiques, tels que, par exemple mais non limitativement, les bâtons utilisés pour le ski de randonnée ou l'alpinisme, comprenant plusieurs tronçons tubulaires successifs et coulissant les uns dans les autres entre une position rétractée et une position déployée.The present invention relates to telescopic tubular assemblies, such as, for example but not limited to, the poles used for ski touring or mountaineering, comprising several successive tubular sections and sliding in each other between a retracted position and a position deployed.

Ces bâtons télescopiques sont utilisés pour régler la longueur du bâton en fonction de la pente du terrain sur lequel évolue l'utilisateur.These telescopic poles are used to adjust the length of the pole according to the slope of the terrain on which the user is moving.

Le bâton est destiné à supporter un effort axial. En conséquence, des moyens de verrouillage sélectifs doivent permettre de bloquer axialement les tronçons les ans par rapport aux autres, soit en position déployée, soit en position rétractée, soit en toutes positions intermédiaires.The stick is intended to support an axial force. Consequently, selective locking means must allow the sections to be axially blocked in relation to the others, either in the deployed position, in the retracted position, or in all intermediate positions.

On a déjà proposé diverses structures assurant le verrouillage des tronçons les uns dans les autres. Dans la plupart de ces structures, un embout axial est fixé en prolongement d'un premier tronçon tubulaire de petit diamètre. L'embout comporte généralement une portée conique et une partie filetée. Une bague expansible de verrouillage est montée à coulissement axial dans le tronçon tubulaire de gros diamètre, et comporte une portée intérieure généralement conique venant en appui contre la portée conique de l'embout axial. Un moyen actionneur tel qu'un écrou est adapté pour coulisser axialement dans le tronçon tubulaire de gros diamètre et être bloqué en rotation dans ce tronçon tubulaire, le moyen actionneur se vissant sur la partie filetée de l'embout axial pour serrer et desserrer axialement la bague par rotation relative des tronçons tubulaires.Various structures have already been proposed ensuring the locking of the sections into one another. In most of these structures, an axial end piece is fixed as an extension of a first tubular section of small diameter. The nozzle generally has a conical bearing and a threaded part. An expandable locking ring is mounted to slide axially in the tubular section of large diameter, and has a generally conical inner bearing bearing against the conical bearing of the axial end piece. An actuator means such as a nut is adapted to slide axially in the tubular section of large diameter and be locked in rotation in this tubular section, the actuator means screwing onto the threaded part of the axial end piece to axially tighten and loosen the ring by relative rotation of the tubular sections.

Par exemple, dans le document FR-A-929 616, le moyen actionneur est constitué par la bague de verrouillage elle-même, qui frotte sur la paroi intérieure du tube de gros diamètre. Le blocage en rotation de la bague s'avère aléatoire.For example, in document FR-A-929 616, the actuator means is constituted by the locking ring itself, which rubs against the inner wall of the large diameter tube. The blocking in rotation of the ring turns out to be random.

Dans le document DE-A-2 407 464, le moyen actionneur est également constitué par la bague elle-même, qui se trouve bloquée en rotation dans le tube de gros diamètre par une nervure longitudinale dépassant de la face intérieure du tube et venant se loger dans une rainure longitudinale de la bague. Dans cette structure, la nervure intérieure du tube de gros diamètre constitue une gêne dans le guidage et le coulissement du tube de petit diamètre à l'intérieur du tube de gros diamètre. Il se produit alors un mauvais guidage entre les deux tubes, qui ne sont pas concentriques. Lors d'efforts de flexion sur le bâton, la nervure intérieure déforme le tube de petit diamètre et le détériore.In document DE-A-2 407 464, the actuator means also consists of the ring itself, which is locked in rotation in the large diameter tube by a longitudinal rib projecting from the inside of the tube and coming lodge in a longitudinal groove in the ring. In this structure, the inner rib of the large-diameter tube constitutes a hindrance in guiding and sliding the small diameter tube inside the large diameter tube. There is then poor guidance between the two tubes, which are not concentric. During bending efforts on the stick, the inner rib deforms the tube of small diameter and deteriorates it.

Dans le document DE-B-1 058 889, le moyen actionneur est également la bague de verrouillage elle-même, qui peut coulisser dans le tube de gros diamètre et est bloquée en rotation dans ce tube par deux nervures diamétralement opposées dans la bague et s'insérant dans deux rainures ménagées dans la face intérieure du tube de gros diamètre. Des nervures extérieures dépassent de la surface extérieure du tube de gros diamètre, en correspondance avec les rainures intérieures. Une telle disposition peut convenir pour un bâton ne comportant que deux tronçons. Toutefois, les nervures extérieures du tube de gros diamètre empêcheraient l'adaptation et le maintien correct d'un troisième tube par dessus ce tube de gros diamètre.In document DE-B-1 058 889, the actuating means is also the locking ring itself, which can slide in the large diameter tube and is locked in rotation in this tube by two diametrically opposed ribs in the ring and fitting into two grooves in the inside of the large diameter tube. Outer ribs protrude from the outer surface of the large diameter tube, in correspondence with the inner grooves. Such an arrangement may be suitable for a stick having only two sections. However, the outer ribs of the large diameter tube would prevent the adaptation and correct maintenance of a third tube over this large diameter tube.

Le document US-A-4 238 164 décrit une structure à deux tubes, dans laquelle le moyen actionneur est la bague de verrouillage, qui peut coulisser dans le tube de gros diamètre et est bloquée en rotation dans ce tube par trois nervures intérieures convexes du tube de gros diamètre engagées dans trois rainures concaves longitudinales de la bague. Le tube de petit diamètre est un cylindre lisse de révolution.Document US-A-4 238 164 describes a two-tube structure, in which the actuating means is the locking ring, which can slide in the large-diameter tube and is locked in rotation in this tube by three convex internal ribs of the large diameter tube engaged in three concave longitudinal grooves of the ring. The small diameter tube is a smooth cylinder of revolution.

Le problème proposé par la présente invention est de concevoir une nouvelle structure de verrouillage qui assure à la fois un bon guidage des tubes l'un par rapport à l'autre, sans faire subir de contraintes mécaniques exagérées à la bague de verrouillage, la structure étant en outre compatible avec la présence de trois ou plus de trois tubes successifs.The problem proposed by the present invention is to design a new locking structure which ensures both good guidance of the tubes relative to each other, without subjecting the locking ring to undue mechanical stress, the structure being further compatible with the presence of three or more of three successive tubes.

De tels bâtons étant utilisés parfois dans des conditions extrêmes, il est important que le verrouillage et le déverrouillage des tronçons les uns dans les autres soient particulièrement fiables, pour éviter tout coulissement intempestif des tronçons les uns dans les autres et pour éviter tout coincement intempestif.Since such sticks are sometimes used under extreme conditions, it is important that the locking and unlocking of the sections one inside the other is particularly reliable, in order to avoid any untimely sliding of the sections in one another and to avoid any untimely jamming.

Pour atteindre ces objets ainsi que d'autres, un ensemble tubulaire télescopique selon l'invention comprend :

  • au moins un premier tronçon tubulaire de grand diamètre et un second tronçon tubulaire de plus petit diamètre, le second tronçon tubulaire ayant une extrémité intérieure logée à l'intérieur du premier tronçon tubulaire et étant monté à rotation libre et à coulissement dans le premier tronçon tubulaire entre une position rétractée et une position déployée,
  • un organe actionneur, comprenant un premier élément actionneur monté à coulissement dans le premier tronçon tubulaire de plus grand diamètre et comprenant un second élément actionneur fixe du second tronçon tubulaire de plus petit diamètre, le premier et le second éléments actionneurs coopérant l'un et l'autre par vissage pour déplacer axialement le premier élément actionneur lors d'une rotation relative axiale,
  • un élément expansible de verrouillage, monté à coulissement axial dans le premier tronçon tubulaire de plus grand diamètre, solidaire en translation axiale du second tronçon tubulaire de plus petit diamètre, et sollicité par le premier élément actionneur de l'organe actionneur provoquant sélectivement son expansion radiale ou sa rétraction lors de ses mouvements axiaux,
  • la surface intérieure du premier tronçon tubulaire de plus grand diamètre comprenant au moins trois nervures longitudinales réparties régulièrement selon son pourtour et occupant toute ou la plus grande partie de sa longueur, chaque nervure s'engageant dans une rainure périphérique longitudinale respective de blocage du premier élément actionneur pour son blocage en rotation,
  • les nervures intérieures du premier tronçon tubulaire étant formées par enfoncement de la paroi du tronçon tubulaire, formant simultanément des rainures extérieures longitudinales de plus faible largeur que les nervures intérieures,
  • le second tronçon tubulaire comprenant des nervures intérieures et des rainures extérieures similaires, ses rainures extérieures étant plus étroites que les nervures intérieures du premier tronçon tubulaire, pour éviter leur engagement mutuel,
  • les nervures du premier tronçon tubulaire étant conformées pour venir en appui à faible jeu et simultanément contre la surface extérieure du second tronçon tubulaire de plus petit diamètre,
  • lesdites nervures présentant une surface de crête concave large et arrondie pour épouser une partie significative du pourtour de la surface extérieure du second tronçon tubulaire et constituer entre les tronçons tubulaires une surface d'appui propre à supporter les contraintes mécaniques de flexion subies par l'ensemble tubulaire télescopique.
To achieve these and other objects, a telescopic tubular assembly according to the invention comprises:
  • at least a first tubular section of large diameter and a second tubular section of smaller diameter, the second tubular section having an inner end housed inside the first tubular section and being mounted for free rotation and sliding in the first tubular section between a retracted position and a deployed position,
  • an actuator member, comprising a first actuator element slidably mounted in the first tubular section of larger diameter and comprising a second fixed actuator element of the second tubular section of smaller diameter, the first and second actuator elements cooperating one and the other other by screwing to axially move the first actuator element during an axial relative rotation,
  • an expandable locking element, mounted to slide axially in the first tubular section of larger diameter, integral in axial translation with the second tubular section of smaller diameter, and biased by the first actuating element of the actuating member selectively causing its radial expansion or its retraction during its axial movements,
  • the inner surface of the first tubular section of larger diameter comprising at least three longitudinal ribs distributed regularly along its periphery and occupying all or most of its length, each rib engaging in a respective longitudinal peripheral groove for blocking the first element actuator for locking in rotation,
  • the internal ribs of the first tubular section being formed by driving in the wall of the tubular section, simultaneously forming longitudinal external grooves of narrower width than the internal ribs,
  • the second tubular section comprising internal ribs and similar external grooves, its external grooves being narrower than the internal ribs of the first tubular section, to avoid their mutual engagement,
  • the ribs of the first tubular section being shaped to come into abutment with little play and simultaneously against the external surface of the second tubular section of smaller diameter,
  • said ribs having a wide and rounded concave ridge surface to match a significant part of the periphery of the outer surface of the second tubular section and constitute between the tubular sections a bearing surface capable of withstanding the stresses bending mechanics undergone by the telescopic tubular assembly.

Selon cette structure, les nervures intérieures du tube de plus grand diamètre, formant des cannelures, constituent donc à la fois des moyens de blocage en rotation du premier élément actionneur, et des moyens appropriés de guidage et de maintien du tube de plus petit diamètre lors de son coulissement dans le tube de plus grand diamètre.According to this structure, the inner ribs of the larger diameter tube, forming grooves, therefore constitute both means for blocking the rotation of the first actuator element, and suitable means for guiding and holding the smaller diameter tube during sliding in the larger diameter tube.

La structure tubulaire cannelée ainsi obtenue est particulièrement rigide, sans augmentation de poids.The fluted tubular structure thus obtained is particularly rigid, without any increase in weight.

Cette structure est compatible avec divers modes de réalisation de l'organe actionneur et de l'élément expansible tels que décrits et revendiqués ci-après.This structure is compatible with various embodiments of the actuator member and of the expandable element as described and claimed below.

D'autres objets, caractéristiques et avantages de la présente invention ressortiront de la description suivante d'un mode de réalisation particulier, faite en relation avec les figures jointes, parmi lesquelles :

  • la figure 1 est une vue de face, en coupe partielle, de la zone de verrouillage entre deux tronçons successifs du bâton télescopique selon un mode de réalisation de la présente invention ;
  • la figure 2 est une vue similaire d'une seconde zone de verrouillage de bâton selon la présente invention ;
  • la figure 3 est une vue en bout de la bague de verrouillage, dans la direction représentée par la flèche A de la figure 1 ;
  • la figure 4 illustre le coulissement des tronçons respectifs les uns dans les autres, en coupe transversale ;
  • la figure 5 est une coupe dans le plan B-B de la figure 1 ;
  • la figure 6 est une vue de face en coupe partielle de la zone de verrouillage entre deux tronçons successifs selon un autre mode de réalisation de la présente invention ;
  • la figure 7 est une vue de face éclatée de la structure de la figure 6 ;
  • la figure 8 est une vue en bout de l'écrou de serrage de la figure 7 ;
  • la figure 9 est une coupe transversale selon le plan C-C de la figure 7 ;
  • la figure 10 est une coupe transversale selon le plan D-D de la figure 7 ;
  • la figure 11 est une vue de face en coupe partielle montrant une structure de bague d'étanchéité selon un premier mode de réalisation ;
  • la figure 12 est une vue de face en coupe partielle montrant une structure de bague d'étanchéité selon un second mode de réalisation ; et
  • les figures 13 à 18 illustrent schématiquement six autres modes de réalisation de l'organe actionneur et de l'élément expansible.
Other objects, characteristics and advantages of the present invention will emerge from the following description of a particular embodiment, given in relation to the attached figures, among which:
  • Figure 1 is a front view, in partial section, of the locking zone between two successive sections of the telescopic stick according to an embodiment of the present invention;
  • Figure 2 is a similar view of a second stick locking area according to the present invention;
  • Figure 3 is an end view of the locking ring, in the direction shown by arrow A in Figure 1;
  • FIG. 4 illustrates the sliding of the respective sections one inside the other, in cross section;
  • Figure 5 is a section in the plane BB of Figure 1;
  • Figure 6 is a partial sectional front view of the locking zone between two successive sections according to another embodiment of the present invention;
  • Figure 7 is an exploded front view of the structure of Figure 6;
  • Figure 8 is an end view of the tightening nut of Figure 7;
  • Figure 9 is a cross section along the plane CC of Figure 7;
  • Figure 10 is a cross section along the plane DD of Figure 7;
  • Figure 11 is a partial sectional front view showing a sealing ring structure according to a first embodiment;
  • Figure 12 is a partial sectional front view showing a sealing ring structure according to a second embodiment; and
  • Figures 13 to 18 schematically illustrate six other embodiments of the actuator member and the expandable element.

Dans le mode de réalisation représenté sur les figures, l'ensemble tubulaire télescopique selon la présente invention est un bâton comprenant trois tronçons successifs, à savoir un premier tronçon tubulaire 1 de plus grand diamètre, un second tronçon tubulaire 2 de plus petit diamètre, et un troisième tronçon tubulaire 3 de diamètre encore plus petit. Le second tronçon 2 est monté à coulissement dans le premier tronçon 1. Le troisième tronçon 3 est monté à coulissement dans le second tronçon 2. Une portion du second tronçon 2 reste en permanence à l'intérieur du premier tronçon 1, et elle comprend une extrémité intérieure 4.In the embodiment shown in the figures, the telescopic tubular assembly according to the present invention is a stick comprising three successive sections, namely a first tubular section 1 of larger diameter, a second tubular section 2 of smaller diameter, and a third tubular section 3 of even smaller diameter. The second section 2 is slidably mounted in the first section 1. The third section 3 is slidably mounted in the second section 2. A portion of the second section 2 remains permanently inside the first section 1, and it includes a inner end 4.

Le premier tronçon tubulaire 1 de plus grand diamètre présente une surface intérieure 5 cylindrique de section généralement circulaire, comprenant au moins trois nervures longitudinales 6, 13 et 14 occupant toute ou la plus grande partie de sa longueur, et de faible hauteur.The first tubular section 1 of larger diameter has a cylindrical inner surface 5 of generally circular section, comprising at least three longitudinal ribs 6, 13 and 14 occupying all or most of its length, and of low height.

Le second tronçon tubulaire 2, de plus petit diamètre, présente une surface extérieure 60 cylindrique, de section généralement circulaire, conformée pour coulisser axialement dans l'espace intérieur limité par la surface intérieure 5 et les nervures longitudinales 6, 13 et 14 du premier tronçon tubulaire 1 de grand diamètre.The second tubular section 2, of smaller diameter, has a cylindrical outer surface 60, of generally circular section, shaped to slide axially in the interior space limited by the interior surface 5 and the longitudinal ribs 6, 13 and 14 of the first section tubular 1 of large diameter.

Dans le mode de réalisation avantageux représenté sur les figures, la surface intérieure 5 du premier tronçon tubulaire 1 présente trois nervures longitudinales 6, 13 et 14 régulièrement réparties selon le pourtour du tronçon. Les trois nervures longitudinales 6, 13 et 14 s'engagent dans trois rainures correspondantes respectives 15, 16 et 17 de la bague de verrouillage 10. De préférence, les nervures 6, 13 et 14 sont formées par enfoncement de la paroi du tube formant le premier tronçon tubulaire 1, l'enfoncement réalisant simultanément les rainures extérieures longitudinales 18, 19 et 20. Les rainures extérieures longitudinales 18, 19 et 20 ont une largeur légèrement plus faible que les nervures intérieures correspondantes 6, 13 et 14.In the advantageous embodiment shown in the figures, the inner surface 5 of the first tubular section 1 has three longitudinal ribs 6, 13 and 14 regularly distributed around the periphery of the section. The three longitudinal ribs 6, 13 and 14 engage in three respective corresponding grooves 15, 16 and 17 of the locking ring 10. Preferably, the ribs 6, 13 and 14 are formed by driving in the wall of the tube forming the first tubular section 1, the depression simultaneously producing the longitudinal external grooves 18, 19 and 20. The longitudinal external grooves 18, 19 and 20 have a width slightly smaller than the corresponding internal ribs 6, 13 and 14.

Les nervures 6, 13 et 14 doivent former la surface d'appui sur laquelle coulisse ou pivote le tronçon tubulaire intérieur 2. Cette surface d'appui doit être capable de supporter les contraintes mécaniques de flexion que l'on désire appliquer entre deux tronçons successifs d'un bâton télescopique. Pour cela, comme le représentent les figures, les nervures 6, 13 et 14 présentent une surface de crête large et arrondie, pour épouser une partie significative du pourtour de la surface extérieure du second tronçon tubulaire. Les nervures 6, 13 et 14 sont conformées pour venir en appui à faible jeu et simultanément contre la surface extérieure du second tronçon tubulaire 2.The ribs 6, 13 and 14 must form the bearing surface on which the inner tubular section slides or pivots 2. This bearing surface must be able to withstand the mechanical stresses bending that you want to apply between two successive sections of a telescopic stick. For this, as shown in the figures, the ribs 6, 13 and 14 have a wide and rounded ridge surface, to match a significant part of the periphery of the outer surface of the second tubular section. The ribs 6, 13 and 14 are shaped to come into abutment with little play and simultaneously against the external surface of the second tubular section 2.

Le second tronçon tubulaire 2 comprend également des nervures et rainures similaires à celles du premier tronçon tubulaire. Toutefois, pour permettre la libre rotation du second tronçon tubulaire dans le premier tronçon tubulaire 1, ses rainures extérieures 21, 22 et 23 sont plus étroites que les nervures intérieures 6, 13 et 14 du premier tronçon tubulaire 1. Ainsi, les nervures intérieures 6, 13 et 14 du premier tronçon tubulaire ne peuvent pas s'engager dans les rainures extérieures correspondantes 21, 22 et 23 du second tronçon tubulaire, qui peut ainsi librement pivoter axialement dans le premier tronçon tubulaire 1.The second tubular section 2 also includes ribs and grooves similar to those of the first tubular section. However, to allow free rotation of the second tubular section in the first tubular section 1, its outer grooves 21, 22 and 23 are narrower than the inner ribs 6, 13 and 14 of the first tubular section 1. Thus, the inner ribs 6 , 13 and 14 of the first tubular section cannot engage in the corresponding external grooves 21, 22 and 23 of the second tubular section, which can thus freely pivot axially in the first tubular section 1.

Dans le mode de réalisation des figures 1 à 10, le second tronçon tubulaire 2 porte, en prolongement de son extrémité intérieure 4, un embout axial 7 comportant une portée généralement conique 8 se prolongeant par une partie filetée 9, par exemple de plus petit diamètre.In the embodiment of FIGS. 1 to 10, the second tubular section 2 carries, as an extension of its internal end 4, an axial end piece 7 having a generally conical surface 8 extended by a threaded part 9, for example of smaller diameter .

Une bague de verrouillage 10 taraudée est vissée sur la partie filetée 9 de l'embout axial 7, et elle comprend une surface extérieure 11 généralement cylindrique conformée pour coulisser axialement à faible jeu dans le premier tronçon tubulaire 1 et pour être bloquée en rotation par les nervures intérieures 6, 13 et 14 du premier tronçon tubulaire 1. La bague de verrouillage 10 comprend une zone d'extrémité 12 élastiquement déformable dans la direction radiale, et orientée axialement pour venir en appui sur la portée conique 8.A threaded locking ring 10 is screwed onto the threaded part 9 of the axial end piece 7, and it comprises a generally cylindrical outer surface 11 shaped to slide axially with little play in the first tubular section 1 and to be locked in rotation by the inner ribs 6, 13 and 14 of the first tubular section 1. The locking ring 10 comprises an end zone 12 which is elastically deformable in the radial direction, and oriented axially so as to bear on the conical bearing 8.

La bague de verrouillage 10 comprend un alésage central 37 taraudé, pour coopérer avec le filetage de la partie filetée 9, et une première portée généralement conique 39 pour coopérer avec la portée conique 8. Ainsi, la bague 10 est vissée sur la partie filetée 9. La longueur de la bague de verrouillage 10 est légèrement inférieure à la longueur de la partie filetée 9. L'extrémité libre 24 de la partie filetée 9 comprend une partie élargie, de diamètre supérieur au diamètre intérieur de la bague de verrouillage 10 pour former butée limitant la course de la bague à l'écart de la portée conique 8.The locking ring 10 comprises a central bore 37 threaded, to cooperate with the threading of the threaded part 9, and a first generally conical bearing 39 to cooperate with the conical bearing 8. Thus, the ring 10 is screwed onto the threaded part 9 The length of the locking ring 10 is slightly less than the length of the threaded part 9. The free end 24 of the threaded part 9 comprises an enlarged part, of diameter greater than the diameter inside of the locking ring 10 to form a stop limiting the stroke of the ring away from the conical bearing 8.

La bague de verrouillage 10 comprend, dans sa zone d'extrémité 12, des fentes longitudinales telles que la fente 25, pour augmenter la souplesse de cette zone d'extrémité. On favorise ainsi les déformations radiales de la zone d'extrémité 12 par l'effet de la portée conique 8 en fin de vissage de la bague de verrouillage 10 sur la partie filetée 9.The locking ring 10 comprises, in its end region 12, longitudinal slots such as the slot 25, to increase the flexibility of this end region. Radial deformations of the end zone 12 are thus favored by the effect of the conical bearing 8 at the end of the screwing of the locking ring 10 on the threaded part 9.

Dans ce mode de réalisation, la bague 10 constitue l'élément expansible et le premier élément actionneur, tandis que l'embout 7 constitue le second élément actionneur.In this embodiment, the ring 10 constitutes the expandable element and the first actuator element, while the end piece 7 constitutes the second actuator element.

Selon un mode de réalisation représenté sur les figures 1 et 2, l'embout 7 est un embout rapporté, engagé en force dans l'extrémité intérieure 4 du second tronçon tubulaire 2.According to an embodiment shown in FIGS. 1 and 2, the endpiece 7 is an attached endpiece, forcibly engaged in the interior end 4 of the second tubular section 2.

Une bague d'étanchéité 26 est adaptée sur l'extrémité de recouvrement 27 du premier troncon tubulaire 1, auquel elle est solidarisée axialement. Pour assurer sa solidarisation axiale, la bague d'étanchéité 26 comprend un rebord intérieur 28 venant s'engager dans une gorge annulaire extérieure 29 du premier tronçon tubulaire 1. La face extrême 30 de la bague d'étanchéité 26 comprend une ouverture 31 dont la section correspond à la section extérieure du second tronçon tubulaire 2, de façon à coulisser à faible jeu sur la surface extérieure du second tronçon tubulaire 2.A sealing ring 26 is fitted on the covering end 27 of the first tubular section 1, to which it is secured axially. To ensure its axial connection, the sealing ring 26 comprises an inner rim 28 which engages in an external annular groove 29 of the first tubular section 1. The end face 30 of the sealing ring 26 comprises an opening 31, the opening of which section corresponds to the outside section of the second tubular section 2, so as to slide with little play on the outside surface of the second tubular section 2.

Une butée limite le déplacement de la bague de verrouillage 10 vers la position déployée du bâton. Par exemple, la butée est réalisée par une saignée 32 ou un poinçonnage sur la surface du premier tronçon tubulaire 1, produisant un ergot dépassant de la face intérieure du premier tronçon tubulaire 1 et contre lequel vient porter la zone d'extrémité 12 de la bague de verrouillage 10.A stop limits the movement of the locking ring 10 to the deployed position of the stick. For example, the stop is produced by a groove 32 or a punching on the surface of the first tubular section 1, producing a lug protruding from the interior face of the first tubular section 1 and against which the end region 12 of the ring comes to bear. lock 10.

Un autre mode de réalisation de butée est représenté sur les figures 1 et 2, sous forme d'une ou plusieurs languettes 33, solidaires de la bague d'étanchéité 26, et venant se loger dans l'espace formé par la rainure extérieure 22 du second tronçon tubulaire 2. La languette 33 vient porter, en bout de course, contre la zone d'extrémité 12 de la bague de verrouillage 10.Another embodiment of abutment is shown in FIGS. 1 and 2, in the form of one or more tongues 33, integral with the sealing ring 26, and coming to be housed in the space formed by the outer groove 22 of the second tubular section 2. The tongue 33 comes to bear, at the end of its travel, against the end region 12 of the locking ring 10.

Une structure de verrouillage similaire est prévue, telle que représentée sur la figure 2, entre le second tronçon tubulaire 2 et le troisième tronçon tubulaire 3.A similar locking structure is provided, as shown in FIG. 2, between the second tubular section 2 and the third tubular section 3.

Le fonctionnement du dispositif est le suivant : dans la position représentée sur la figure 1, la bague de verrouillage 10 est à l'écart de la portée conique 8. Dans cette position, la bague de verrouillage 10 coulisse librement, sans frottement important, dans le premier tronçon tubulaire 1. Il en résulte que le second tronçon tubulaire 2, qui est solidaire axialement de la bague de verrouillage 10 et de l'embout 7, coulisse librement dans le premier tronçon tubulaire 1. Pour obtenir le verrouillage des tronçons successifs les uns par rapport aux autres, lorsque la longueur désirée du bâton a été obtenue par coulissement axial, l'utilisateur provoque une rotation relative du second tronçon tubulaire 2 dans le premier tronçon tubulaire 1. Lors de la rotation du second tronçon tubulaire 2, la bague de verrouillage 10 reste solidaire en rotation du premier tronçon tubulaire 1, et se visse donc sur la partie filetée 9, lorsque la rotation est dans le sens du vissage. En fin de vissage, la bague de verrouillage 10 vient porter contre la portée conique 8, qui provoque l'évasement de la zone d'extrémité 12. Cette zone d'extrémité 12 vient en appui contre la surface intérieure 5 du premier tronçon tubulaire 1, assurant un frottement important empêchant tout coulissement axial ultérieur des tronçons tubulaires les uns dans les autres. Un verrouillage similaire est obtenu par rotation relative du troisième tronçon tubulaire 3 dans le second tronçon tubulaire 2.The operation of the device is as follows: in the position shown in FIG. 1, the locking ring 10 is away from the conical bearing 8. In this position, the locking ring 10 slides freely, without significant friction, in the first tubular section 1. As a result, the second tubular section 2, which is axially integral with the locking ring 10 and the end piece 7, slides freely in the first tubular section 1. To obtain the locking of the successive sections the relative to each other, when the desired length of the stick has been obtained by axial sliding, the user causes a relative rotation of the second tubular section 2 in the first tubular section 1. During the rotation of the second tubular section 2, the ring locking 10 remains integral in rotation with the first tubular section 1, and is therefore screwed onto the threaded part 9, when the rotation is in the direction of screwing. At the end of screwing, the locking ring 10 comes to bear against the conical bearing 8, which causes the flaring of the end zone 12. This end zone 12 comes to bear against the internal surface 5 of the first tubular section 1 , ensuring high friction preventing any subsequent axial sliding of the tubular sections into one another. A similar locking is obtained by relative rotation of the third tubular section 3 in the second tubular section 2.

Le déverrouillage est obtenu aisément par rotation des éléments tubulaires successifs les uns par rapport aux autres dans le sens inverse provoquant le dévissage des bagues de verrouillage 10 sur les parties filetées 9 d'embout 7.Unlocking is easily obtained by rotation of the successive tubular elements with respect to each other in the opposite direction, causing the locking rings 10 to be unscrewed on the threaded parts 9 of the end piece 7.

En fin de dévissage de la bague de verrouillage 10, si l'utilisateur poursuit la rotation relative des tronçons tubulaires les uns par rapport aux autres, la bague de verrouillage 10 vient porter contre la partie élargie 24 de l'embout 7, interdisant toute rotation axiale supplémentaire et toute désolidarisation de la bague de verrouillage 10 par rapport au second tronçon tubulaire 2.At the end of unscrewing the locking ring 10, if the user continues the relative rotation of the tubular sections relative to each other, the locking ring 10 comes to bear against the enlarged part 24 of the end piece 7, preventing any rotation additional axial and any separation of the locking ring 10 relative to the second tubular section 2.

Le coulissement des tronçons successifs les uns dans les autres est limité, dans le sens de la séparation des tronçons les uns par rapport aux autres, par les butées telles que la saignée 32 ou la languette 33 venant porter contre la zone d'extrémité 12 de la bague de verrouillage 10.The sliding of the successive sections into one another is limited, in the direction of the separation of the sections from one another, by the stops such as the groove 32 or the tongue 33 coming to bear against the end zone 12 of the locking ring 10.

Dans le mode de réalisation représenté sur les figures 6 à 10, l'élément expansible est une bague 10 de verrouillage. L'organe actionneur comprend un premier élément actionneur constitué d'un écrou 35 se vissant sur la partie filetée 9 de l'embout axial 7 formant le second élément actionneur. L'écrou 35 est conformé pour coulisser axialement dans un passage axial 36 de la bague 10 tout en étant bloqué en rotation par rapport à ladite bague 10. Pour cela, l'écrou 35 comporte avantageusement une surface extérieure prismatique, par exemple en six pans, le passage 36 axial ayant une section hexagonale correspondante, comme illustré sur la figure 8. La bague 10 comporte, sur sa surface extérieure, des rainures longitudinales de blocage recevant les nervures intérieures correspondantes du premier tronçon tubulaire 1, comme dans le mode de réalisation des figures 1 et 2. Ainsi, l'écrou 35 est bloqué en rotation dans le premier tronçon tubulaire 1 indirectement par l'intermédiaire de la bague 10, et il porte contre une surface d'extrémité de la bague 10, à savoir le fond du passage axial 36.In the embodiment shown in Figures 6 to 10, the expandable member is a locking ring 10. The actuator member comprises a first actuator element consisting of a nut 35 which is screwed onto the threaded part 9 of the axial end piece 7 forming the second actuator element. The nut 35 is shaped to slide axially in an axial passage 36 of the ring 10 while being locked in rotation relative to said ring 10. For this, the nut 35 advantageously comprises a prismatic outer surface, for example in hexagon , the axial passage 36 having a corresponding hexagonal section, as illustrated in FIG. 8. The ring 10 has, on its external surface, longitudinal locking grooves receiving the corresponding internal ribs of the first tubular section 1, as in the embodiment of Figures 1 and 2. Thus, the nut 35 is locked in rotation in the first tubular section 1 indirectly via the ring 10, and it bears against an end surface of the ring 10, namely the bottom of the axial passage 36.

Dans ce mode de réalisation, la bague 10 comporte une partie centrale 37 dont le trou axial est sensiblement cylindrique, et deux parties d'extrémité 38 et 139 dont le trou axial est de plus grand diamètre et se raccorde au trou de partie centrale 37 par une première portée généralement conique 39 et une seconde portée généralement conique 40. La première portée généralement conique 39 vient en appui sur la portée conique correspondante 8 de l'embout axial 7. La seconde portée généralement conique 40 de la bague 10 vient en appui contre une portée conique correspondante 41 de l'écrou 35.In this embodiment, the ring 10 comprises a central part 37 whose axial hole is substantially cylindrical, and two end parts 38 and 139 whose axial hole is of larger diameter and is connected to the central part hole 37 by a first generally conical bearing 39 and a second generally conical bearing 40. The first generally conical bearing 39 bears on the corresponding conical bearing 8 of the axial end piece 7. The second generally conical bearing 40 of the ring 10 bears against a corresponding conical bearing 41 of the nut 35.

Comme dans le mode de réalisation de la figure 1, la première portée conique 39 de la bague 10 est associée à une première série de fentes telles que la fente 25. En outre, dans ce second mode de réalisation, la seconde portée conique 40 de la bague 10 est associée à une seconde série de fentes longitudinales telles que les fentes 42 et 43, autorisant également l'expansion radiale de la bague 10.As in the embodiment of FIG. 1, the first conical bearing surface 39 of the ring 10 is associated with a first series of slots such as the slot 25. Furthermore, in this second embodiment, the second conical bearing surface 40 of the ring 10 is associated with a second series of longitudinal slots such as the slots 42 and 43, also allowing the radial expansion of the ring 10.

Comme on le voit sur les figures 7 à 10, les fentes 25 de la première série de fentes sont imbriquées par rapport aux fentes 42 et 43 de la seconde série de fentes. Les portées coniques 39 et 40 de la bague 10 sont disposées sensiblement au tiers et aux deux tiers de la longueur de la bague. On obtient ainsi une augmentation sensible de la surface de frottement de la bague sur la face interne du premier tronçon tubulaire 1.As seen in Figures 7 to 10, the slots 25 of the first series of slots are nested relative to the slots 42 and 43 of the second series of slots. The conical surfaces 39 and 40 of the ring 10 are arranged substantially at one third and two thirds of the length of the ring. This results in a significant increase in the area of friction of the ring on the internal face of the first tubular section 1.

On conçoit que la structure de verrouillage selon la présente invention peut prendre plusieurs formes de réalisation. Les figures 13 à 18 illustrent six modes de réalisation, représentés schématiquement en coupe longitudinale, seuls les éléments intervenant dans le verrouillage étant représentés.It is understood that the locking structure according to the present invention can take several embodiments. Figures 13 to 18 illustrate six embodiments, shown schematically in longitudinal section, only the elements involved in the locking being shown.

Sur la figure 13, l'élément expansible est une bague de verrouillage 10, généralement cylindrique, munie d'un alésage axial. La bague 10 est réalisée en élastomère, et elle coulisse à faible jeu dans le premier tronçon tubulaire 1. L'organe actionneur comprend un premier élément actionneur constitué par un écrou 35, et comprend un second élément actionneur constitué par l'embout 7, fixé dans le second tronçon tubulaire 2. L'écrou 35 comporte les rainures de blocage, non représentées sur la figure, qui reçoivent les nervures de blocage 6, 13, 14 du premier tronçon tubulaire 1. L'écrou 35 porte contre une surface d'extrémité de la bague 10. La bague 10 en élastomère est pressée axialement entre l'écrou 35 et la base de l'embout axial 7, lors du vissage de l'écrou 35 sur la partie filetée de l'embout axial 7, provoquant l'expansion radiale de la bague 10 et le verrouillage des éléments tubulaires 1 et 2 l'un par rapport à l'autre.In FIG. 13, the expandable element is a locking ring 10, generally cylindrical, provided with an axial bore. The ring 10 is made of elastomer, and it slides with little play in the first tubular section 1. The actuator member comprises a first actuator element constituted by a nut 35, and comprises a second actuator element constituted by the end piece 7, fixed in the second tubular section 2. The nut 35 has the locking grooves, not shown in the figure, which receive the locking ribs 6, 13, 14 of the first tubular section 1. The nut 35 bears against a surface of end of the ring 10. The elastomer ring 10 is pressed axially between the nut 35 and the base of the axial end piece 7, when the nut 35 is screwed onto the threaded part of the axial end piece 7, causing the 'radial expansion of the ring 10 and the locking of the tubular elements 1 and 2 relative to each other.

Dans le mode de réalisation de la figure 14, l'élément expansible de verrouillage formé par la bague 10 est similaire de celui de la figure 13, et est pressé axialement par l'organe actionneur également de manière similaire. Dans ce cas, l'organe actionneur comprend un premier élément actionneur constitué d'une vis 135 dont la tête 136 comporte sur sa surface extérieure les rainures de blocage recevant les nervures de blocage 6, 13, 14 du premier élément tubulaire 1. La tige 137 se visse dans un alésage taraudé du second élément actionneur 107.In the embodiment of FIG. 14, the expandable locking element formed by the ring 10 is similar to that of FIG. 13, and is pressed axially by the actuating member also in a similar manner. In this case, the actuator member comprises a first actuator element consisting of a screw 135, the head 136 of which has on its outer surface the locking grooves receiving the locking ribs 6, 13, 14 of the first tubular element 1. The rod 137 is screwed into a threaded bore of the second actuator element 107.

Dans ces deux modes de réalisation des figures 13 et 14, la bague 10 peut comporter une surface périphérique lisse, dépourvue de rainures longitudinales.In these two embodiments of Figures 13 and 14, the ring 10 may have a smooth peripheral surface, devoid of longitudinal grooves.

Par contre, dans les deux modes de réalisation des figures 15 et 16, l'élément expansible de verrouillage est une bague de verrouillage à alésage intérieur lisse et dont la surface extérieure comprend les rainures longitudinales périphériques de blocage recevant les nervures intérieures de blocage 6, 13, 14 du premier élément tubulaire 1. Sur la figure 15 l'organe actionneur a une structure similaire à celle du mode de réalisation de la figure 6, avec un premier élément actionneur 35 formé d'un écrou à six pans coulissant axialement dans un passage axial 36 correspondant de la bague 10, et avec un embout 7 formant le second élément actionneur. L'écrou 35 se visse sur une partie filetée 9 de l'embout. L'écrou 35 est solidaire en rotation de la bague 10 qui est elle-même solidaire en rotation du premier élément tubulaire 1.On the other hand, in the two embodiments of FIGS. 15 and 16, the expansible locking element is a locking ring with a smooth internal bore and the external surface of which comprises the longitudinal longitudinal locking grooves receiving the internal locking ribs 6, 13, 14 of the first tubular element 1. In FIG. 15, the actuator member has a structure similar to that of the embodiment of FIG. 6, with a first actuator element 35 formed from a nut hexagon sliding axially in a corresponding axial passage 36 of the ring 10, and with a nozzle 7 forming the second actuator element. The nut 35 is screwed onto a threaded part 9 of the end piece. The nut 35 is integral in rotation with the ring 10 which is itself integral in rotation with the first tubular element 1.

Sur la figure 16, l'organe actionneur comprend une vis 235 dont la tête à six pans 236 est logée dans un logement correspondant de la bague 10, et dont la tige 237 se visse dans un alésage taraudé de l'embout 207 formant le second élément actionneur.In FIG. 16, the actuator member comprises a screw 235 whose hexagon head 236 is housed in a corresponding housing of the ring 10, and whose rod 237 is screwed into a threaded bore of the end piece 207 forming the second actuator element.

La figure 17 illustre un mode de réalisation dans lequel la bague 10 forme elle-même le premier élément actionneur, et comporte une tête munie des rainures de blocage, et une tige filetée 100 se vissant dans un alésage taraudé correspondant d'un embout 307 formant le second élément actionneur. L'embout 307 comporte une portée généralement conique 308 coopérant avec une portée intérieure généralement conique 309 de la bague 10, pour provoquer son expansion.FIG. 17 illustrates an embodiment in which the ring 10 itself forms the first actuator element, and comprises a head provided with locking grooves, and a threaded rod 100 screwing into a corresponding tapped bore of a nozzle 307 forming the second actuator element. The tip 307 has a generally conical bearing 308 cooperating with a generally conical inner bearing 309 of the ring 10, to cause its expansion.

La figure 18 illustre un mode de réalisation similaire de celui de la figure 13, dans lequel la bague 10 comporte, au voisinage de ses deux extrémités axiales, des portées intérieures coniques pour coopérer avec des portées extérieures correspondantes généralement coniques de l'écrou 35 et de l'embout 7.FIG. 18 illustrates an embodiment similar to that of FIG. 13, in which the ring 10 has, in the vicinity of its two axial ends, tapered inner bearing surfaces to cooperate with corresponding generally tapered outer bearing surfaces of the nut 35 and tip 7.

Ces modes de réalisation sont donnés à titre d'exemple, et d'autres combinaisons des structures de premier élément actionneur, de second élément actionneur et d'élément expansible de verrouillage pourront être agencées d'autres manières aisément accessibles à l'homme du métier.These embodiments are given by way of example, and other combinations of the structures of the first actuator element, of the second actuator element and of the expandable locking element may be arranged in other ways easily accessible to those skilled in the art. .

Une efficacité encore accrue du verrouillage peut être obtenue en utilisant une bague de verrouillage en élastomère, et en utilisant un organe actionneur qui agit sur ladite bague simultanément en exerçant une compression axiale contre ses deux faces extrêmes, et en exerçant une poussée radiale vers l'extérieur sur la face intérieure de son alésage axial, par des portées généralement coniques correspondantes. On peut ainsi répartir de manière plus appropriée et régulière les déformations radiales de la bague, qui vient s'appliquer de manière très efficace sur la face intérieure du premier élément tubulaire. Une telle action peut par exemple être réalisée dans le mode de réalisation de la figure 18.A further increased locking efficiency can be obtained by using an elastomer locking ring, and by using an actuating member which acts on said ring simultaneously by exerting axial compression against its two end faces, and by exerting a radial thrust towards the outside on the inside face of its axial bore, by corresponding generally conical surfaces. It is thus possible to distribute in a more appropriate and regular manner the radial deformations of the ring, which is applied very effectively on the inner face of the first tubular element. Such an action can for example be carried out in the embodiment of FIG. 18.

Dans le mode de réalisation de la figure 11, une bague d'étanchéité 26 est adaptée autour de l'extrémité du premier tronçon 1 tubulaire de gros diamètre. La bague 26 peut tourner axialement par rapport au premier tronçon tubulaire 1, comme dans le mode de réalisation des figures 1 et 2.In the embodiment of Figure 11, a sealing ring 26 is fitted around the end of the first tubular section 1 of large diameter. The ring 26 can rotate axially relative to the first tubular section 1, as in the embodiment of FIGS. 1 and 2.

Dans le mode de réalisation de la figure 12, l'étanchéité est assurée par une bague d'étanchéité 45, adaptée autour de l'extrémité du premier tronçon tubulaire 1 de gros diamètre sur lequel elle est solidarisée en rotation et en translation. La bague 45 comporte un retour 46 venant coiffer une entretoise 47 annulaire cannelée insérée entre le retour 46 de ladite bague 45 et la tranche du premier tronçon 1 de gros diamètre. L'entretoise 47 peut coulisser sur le second tronçon 2 de petit diamètre par rapport auquel elle est bloquée en rotation par l'engagement de ses cannelures internes avec les cannelures externes du second tronçon tubulaire 2, assurant ainsi une bonne étanchéité.In the embodiment of Figure 12, the seal is provided by a sealing ring 45, adapted around the end of the first tubular section 1 of large diameter on which it is secured in rotation and in translation. The ring 45 has a return 46 from covering a splined annular spacer 47 inserted between the return 46 of said ring 45 and the edge of the first section 1 of large diameter. The spacer 47 can slide on the second section 2 of small diameter with respect to which it is locked in rotation by the engagement of its internal splines with the external splines of the second tubular section 2, thus ensuring good sealing.

La présente invention n'est pas limitée aux modes de réalisation qui ont été explicitement décrits, mais elle en inclut les diverses variantes et généralisations contenues dans le domaine des revendications ci-après.The present invention is not limited to the embodiments which have been explicitly described, but it includes the various variants and generalizations thereof contained in the field of claims below.

Claims (13)

  1. Telescopic tubular assembly comprising:
    - at least one larger diameter first tubular section (1) and one smaller diameter second tubular section (2) having an inside end (4) housed inside the first tubular section (1) and able to rotate freely and to slide inside the first tubular section (1) between a retracted position and a deployed position,
    - an actuator device comprising a first actuator member (35) sliding in the larger diameter first tubular section (1) and comprising a second actuator member (7) fixed to the smaller diameter second tubular section (2), the first actuator member (35) and the second actuator member (7) cooperating with each other in the manner of a screw in order to displace the first actuator member (35) axially upon relative axial rotation,
    - an expandable locking member (10) sliding axially in the larger diameter first tubular section (1), constrained to move in axial translation with the smaller diameter second tubular section (2) and acted on by the first actuator member (35) of the actuator device selectively to expand it radially or to retract it when it moves axially,
    - the interior surface (5) of the larger diameter first tubular section (1) comprising at least three equi-angularly distributed longitudinal ribs (6, 13, 14) extending along all or the major part of its length and each engaged in a respective longitudinal peripheral locking groove (15, 16, 17) of the first actuator member to lock it against rotation,
    - the interior ribs of the first tubular section (1) being formed by depressing the wall of said tubular section to form simultaneously longitudinal exterior grooves (18, 19, 20) which are narrower than the interior ribs (6, 13, 14), characterized in that:
    - the second tubular section (2) comprises similar interior ribs and exterior grooves, its exterior grooves (21, 22, 23) being narrower than the interior ribs (6, 13, 14) of the first tubular section (1) to prevent their mutual interengagement,
    - the ribs (6, 13, 14) of the first tubular section (1) are shaped to bear with a small clearance and simultaneously against the exterior surface of the smaller diameter second tubular section (2),
    - said ribs (6, 13, 14) have a wide and rounded concave outermost surface to mate with a significant portion of the exterior surface of the second tubular section (2) and to constitute between the tubular sections (1, 2) a bearing surface adapted to withstand mechanical bending loads exerted on the telescopic tubular assembly.
  2. Telescopic tubular assembly according to claim 1 characterized in that it comprises three successive tubular sections (1, 2, 3) joined together in pairs in a similar manner to be locked or unlocked by axial rotation, the first two tubular sections (1, 2) at least comprising longitudinal ribs and grooves to prevent relative rotation.
  3. Telescopic tubular assembly according to claim 1 or claim 2 characterized in that the first actuator member comprises the expandable member (10) itself which is a collar having a screwthreaded axial bore (37) screwed onto a protruding axial screwthreaded part (9) of the second actuator member (7) and which has said locking grooves (15, 16, 17) on its exterior surface.
  4. Telescopic tubular assembly according to claim 1 or claim 2 characterized in that the first actuator member comprises the expandable member (10) itself which is a screw whose head comprises said locking grooves (15, 16, 17) and whose screwthreaded shank (100) is screwed into a screwthreaded bore of the second actuator member (307).
  5. Telescopic tubular assembly according to claim 1 or claim 2 characterized in that the first actuator member is a nut (35) separate from the expandable member (10), screwed onto a protruding axial screwthreaded part (9) of the second actuator member (7) and comprising on its exterior surface said locking grooves (15, 16, 17), the nut (35) bearing against an end surface of the expandable member (10).
  6. Telescopic tubular assembly according to claim 1 or claim 2 characterized in that the first actuator member is a screw (135) whose head (136) has said locking grooves (15, 16, 17) on its exterior surface and whose screwthreaded shank (137) is screwed into a screwthreaded bore of the second actuator member (107).
  7. Telescopic tubular assembly according to claim 1 or claim 2 characterized in that the first actuator member is a nut (35) screwed onto a protruding axial screwthreaded part (9) of the second actuator member (7), the external surface of the nut (35) sliding axially in an axial passage (36) of the expandable member (10) and being locked against rotation relative to said expandable member (10) which comprises on its exterior surface said locking grooves (15, 16, 17), the nut (35) bearing against an end surface of the expandable member (10).
  8. Telescopic tubular assembly according to any one of claims 3 to 7 characterized in that a generally conical interior surface (39) of the expandable member (10) bears against a generally conical exterior surface (8) of the second actuator member (7) to cause expansion of the respective end area of the expandable member (10).
  9. Telescopic tubular assembly according to claim 5 or claim 7 characterized in that:
    - the expandable member (10) is a collar having a central part (37) with a substantially cylindrical axial hole and two end parts (38, 139) with a larger diameter axial hole joined to the hole in the central part (37) by generally conical first and second bearing surfaces (39, 40),
    - the first conical bearing surface (39) bears on a complementary conical bearing surface (8) of the second actuator member (7),
    - the second conical bearing surface (40) bears on a complementary conical bearing surface (41) of the first actuator member (35), the conical bearing surfaces (39, 40) are associated with two series of longitudinal slots (25, 42, 43) allowing radial expansion of the collar (10).
  10. Telescopic tubular assembly according to claim 9 characterized in that:
    - the slots (25) of the first series of slots are interleaved with the slots (42, 43) of the second series of slots of the collar (10),
    - the conical bearing surfaces (39, 40) of the collar (10) are substantially one-third and two-thirds along the length of the collar.
  11. Telescopic tubular assembly according to any one of claims 1 to 10 characterized in that a sealing collar (26) is fitted over the overlapping end (27) of the first tubular section (1) to which it is fastened axially, the sealing collar (26) having an end part (30) shaped to slide with a small clearance on the outside surface of the second tubular section (2).
  12. Telescopic tubular assembly according to any one of claims 1 to 11 characterized in that the junction between two successive sections (1, 2) is sealed by a sealing collar (45) fitted around the end of the larger diameter first tubular section (1), prevented from moving relative to the latter in rotation and in translation and comprising a lip (46) fitting over a splined annular spacer (47) inserted between the lip (46) of said collar (45) and the edge of the larger diameter first section (1), the spacer (47) being able to slide on the smaller diameter second section (2) and being locked against rotation relative to said second section.
  13. Telescopic tubular assembly according to any one of claims 1 to 12 characterized in that an abutment (32, 33) limits displacement of the expandable member (10) towards the deployed position.
EP92909620A 1991-05-24 1992-04-14 Telescopic tubular splined assembly Expired - Lifetime EP0586409B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9106359 1991-05-24
FR9106359A FR2676654B1 (en) 1991-05-24 1991-05-24 TELESCOPIC STICK.
PCT/FR1992/000328 WO1992020413A1 (en) 1991-05-24 1992-04-14 Telescopic tubular splined assembly

Publications (2)

Publication Number Publication Date
EP0586409A1 EP0586409A1 (en) 1994-03-16
EP0586409B1 true EP0586409B1 (en) 1995-06-28

Family

ID=9413161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92909620A Expired - Lifetime EP0586409B1 (en) 1991-05-24 1992-04-14 Telescopic tubular splined assembly

Country Status (7)

Country Link
US (1) US5458427A (en)
EP (1) EP0586409B1 (en)
JP (1) JPH06507466A (en)
AT (1) ATE124279T1 (en)
DE (1) DE69203235T2 (en)
FR (1) FR2676654B1 (en)
WO (1) WO1992020413A1 (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689943B1 (en) * 1992-04-14 1995-11-03 Simond Ludger TELESCOPIC TUBULAR ASSEMBLY.
DE19509081C1 (en) * 1995-03-16 1996-06-05 Reukauf Veit Ullrich Length adjustable ski stick
KR970013945U (en) * 1995-09-18 1997-04-28 Pole assembly of tent
DE29605242U1 (en) * 1996-03-21 1996-06-27 Leki-Sport Lenhart GmbH, 73230 Kirchheim Ski or hiking stick
IT241857Y1 (en) * 1996-06-18 2001-05-17 Renato Longo TELESCOPIC AUCTION LOCKING DEVICE
US5876066A (en) * 1996-12-03 1999-03-02 Petkov; Ivan Carving ski pole
DE19651580C2 (en) * 1996-12-12 2000-12-14 Ulrike Peters Telescopic pole
DE29700575U1 (en) * 1997-01-15 1997-02-27 Skf Gmbh, 97421 Schweinfurt Eccentric bearing with adjustment lever
US6290192B1 (en) 1999-03-02 2001-09-18 Loyd R. Messerli Adjustable receiver tube
JP3097958B1 (en) * 1999-08-23 2000-10-10 日本ベルボン精機工業株式会社 Telescopic device and tripod
DE20207554U1 (en) * 2002-05-08 2003-10-09 Lenhart Klaus Length-adjustable tube, especially for sticks
US8297870B2 (en) * 2002-05-08 2012-10-30 Leki Lenhart GmbH Adjustable length pole or stick
AT7093U1 (en) * 2003-12-15 2004-10-25 Komperdell Sportartikel Gmbh CLAMPING DEVICE FOR TELESCOPICALLY SLIDING TUBES
AT8924U1 (en) * 2005-06-30 2007-02-15 Komperdell Sportartikel Gmbh ARRANGEMENT FROM TUBES
CN200946613Y (en) * 2006-08-16 2007-09-12 陈建忠 Stepless regulation friction ring locked type telescopic tube
CN101204262B (en) * 2006-12-21 2011-12-14 张书闵 Middle bar structure able to reduce the gap
EP2139372B1 (en) 2007-04-03 2016-07-20 Diversey, Inc. Mop head fixation device and method
KR100982703B1 (en) * 2007-08-07 2010-09-17 (주) 민성정밀 Fixing device of sports stick with variable length
WO2009039578A1 (en) * 2007-09-28 2009-04-02 Walter Peter Wright Improved internal locking device for extendable telescoping poles
CN201190709Y (en) * 2008-04-30 2009-02-04 陈世能 Cam connection locking mechanism for telescopic pipe
JP5368338B2 (en) * 2010-02-18 2013-12-18 村上工業株式会社 Telescopic pole
CH706752A1 (en) * 2012-07-19 2014-01-31 Lekisport Ag Length adjustable pipe, especially for sticks.
CA2873219C (en) 2012-07-24 2019-04-02 Blephex, Llc Device for treating an ocular disorder
USD719712S1 (en) 2012-09-07 2014-12-16 Diversey, Inc. Floor maintenance tool
KR101698530B1 (en) * 2015-04-01 2017-01-20 황선호 Pole shaft apparatus
CN205371189U (en) * 2016-03-11 2016-07-06 宁波意美捷影视设备有限公司 Telescoping device and contain its tripod
USD1019367S1 (en) * 2023-09-22 2024-03-26 Qingyun LI Spring fixed telescopic device
USD1019366S1 (en) * 2023-09-22 2024-03-26 Qingyun LI Connector

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB278142A (en) * 1926-08-16 1927-10-06 William James Hadden Improvements in golf clubs
US2275330A (en) * 1938-06-29 1942-03-03 Tveten Finn Ski stick
US2533733A (en) * 1943-12-22 1950-12-12 Jensen Hans August Extensible ski pole
BE468340A (en) * 1944-12-28
FR929616A (en) * 1946-06-22 1948-01-02 Improvements to ski poles
US2456205A (en) * 1946-09-26 1948-12-14 Magder Jesse Ski pole
FR949108A (en) * 1946-10-29 1949-08-22 Device for fixing telescopic tubes together
CH267177A (en) * 1947-11-19 1950-03-15 Techna Anstalt Fuer Verwertung Device on two telescoping parts, for locking these parts in any lengthwise adjustment position.
DE1058889B (en) * 1956-10-11 1959-06-04 Josef Rosskopf Jun Length-adjustable ski pole
BR7400329D0 (en) * 1973-01-18 1974-11-05 G Salmon SKI BASKET AND ADJUSTABLE ROD SET
DE2407464C3 (en) * 1974-02-16 1979-07-19 Karl 7312 Kirchheim Lenhart Clamping device for a telescopic length-adjustable ski pole
DE2834260A1 (en) * 1978-02-18 1980-02-28 Dsi Sportartikel LENGTH ADJUSTABLE SKI STICK
US4238164A (en) * 1979-03-13 1980-12-09 H & G Industries, Inc. Positive locking device for telescoping tubing
DE8004343U1 (en) * 1980-02-19 1980-06-04 Dsi-Sportartikel Gmbh, 8961 Weitnau LENGTH ADJUSTABLE SKI STICK
US4441837A (en) * 1981-09-04 1984-04-10 Joseph Mastroni Golf club coupling assembly
GB2180458B (en) * 1985-09-06 1989-08-23 Tele Cue Ltd Further improvements in or relating to cues
US4856929A (en) * 1987-10-21 1989-08-15 Steccone Products Co. Interior clamping device for tubular poles

Also Published As

Publication number Publication date
EP0586409A1 (en) 1994-03-16
DE69203235T2 (en) 1996-02-15
US5458427A (en) 1995-10-17
ATE124279T1 (en) 1995-07-15
WO1992020413A1 (en) 1992-11-26
FR2676654A1 (en) 1992-11-27
JPH06507466A (en) 1994-08-25
DE69203235D1 (en) 1995-08-03
FR2676654B1 (en) 1994-01-28

Similar Documents

Publication Publication Date Title
EP0586409B1 (en) Telescopic tubular splined assembly
EP0196931B1 (en) Self-adjusting flexible control cable
CA2360088C (en) Device for quick connection of a tube to a rigid element
FR2636382A1 (en) FIXING ELEMENT AND RETAINING RING ASSEMBLY
EP0636214B1 (en) Telescoping tubular assembly
FR2984443A1 (en) ROLLER SCREW.
FR2740403A1 (en) STEERING ASSEMBLY FOR BICYCLE
EP0053144A1 (en) Jack, particularly telescopic jack, provided with means for restricting the stroke
WO2001094798A1 (en) Insert for implanting a tube connection in a tapped housing
FR2619177A1 (en) HELICAL SPRING COMPRESSOR
FR2671847A1 (en) FITTINGS HANDLE.
FR2894635A1 (en) PIECE FOR BONDING TUBULAR ELEMENTS TO REALIZE A MODULAR TUBULAR STRUCTURE
EP0336837B1 (en) Automatic blocking device for extended telescopic tubes
FR2549915A1 (en) Setting screw with nut and plastics washer
BE527928A (en)
FR2751383A1 (en) NUTS BLACK TO BE BLIND AND FINE INTO HEAD
FR2944538A1 (en) Clamp for supporting and fixing corbel work structure on wall of building, has locking unit having latch and clamping element delimiting journal against internal surface of traversing opening of wall to lock clamp on wall
FR2944540A1 (en) Clamp for supporting and fixing corbel work structure on wall of building, has displacement units moving deployable unit between insertion and withdrawal position and deployed position by sliding motion of sliders compared to body
EP1591343B1 (en) Axial travel limiter for the pressure yoke of an automotive rack-and-pinion steering gear
FR2607201A1 (en) Device for fixing onto a threaded or ringed shaft
FR2711750A1 (en) Device for immobilising a body in a bore
EP0307327A1 (en) Screwed connecting device between two elements affording adjustment of the distance between them
FR2767181A1 (en) DEVICE FOR QUICK CONNECTION OF A TUBE TO A RIGID ELEMENT
FR2676804A1 (en) STRUCTURE FOR THE EXTENSION AND CONTRACTION OF A PROTECTIVE BATON.
FR2490297A1 (en) Anchor bolt for concrete - has expandable segments which enclose whole of unthreaded part of expander bolt

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19931102

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE FR IT LI

17Q First examination report despatched

Effective date: 19940418

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SIMOND, LUDGER

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR IT LI

REF Corresponds to:

Ref document number: 124279

Country of ref document: AT

Date of ref document: 19950715

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69203235

Country of ref document: DE

Date of ref document: 19950803

ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R.L.

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980410

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19980429

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980630

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980731

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990414

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990430

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991231

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050414