US3347522A - Step-by-step driving-jack - Google Patents

Step-by-step driving-jack Download PDF

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Publication number
US3347522A
US3347522A US541181A US54118166A US3347522A US 3347522 A US3347522 A US 3347522A US 541181 A US541181 A US 541181A US 54118166 A US54118166 A US 54118166A US 3347522 A US3347522 A US 3347522A
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US
United States
Prior art keywords
gripping
jaws
cylinder
head
piston
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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
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US541181A
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English (en)
Inventor
Reinmann Alfred
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.)
Werkzeugfabrik Selzach AG
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Werkzeugfabrik Selzach AG
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Publication date
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/30—Constructional features with positive brakes or locks
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0836—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks
    • E02B17/0854—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks with clamping wedges, eccentric clamping devices and so on
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E04G11/20—Movable forms; Movable forms for moulding cylindrical, conical or hyperbolical structures; Templates serving as forms for positioning blocks or the like
    • E04G11/22—Sliding forms raised continuously or step-by-step and being in contact with the poured concrete during raising and which are not anchored in the hardened concrete; Arrangements of lifting means therefor
    • E04G11/24—Construction of lifting jacks or climbing rods for sliding forms
    • 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
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/44—Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44068—Clasp, clip, support-clamp, or required component thereof having gripping member actuated by fluid force
    • 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
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/44—Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44573—Clasp, clip, support-clamp, or required component thereof including track or way guided and retained gripping member
    • Y10T24/4459—Clasp, clip, support-clamp, or required component thereof including track or way guided and retained gripping member with operator for moving guided 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
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/44—Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44573—Clasp, clip, support-clamp, or required component thereof including track or way guided and retained gripping member
    • Y10T24/44607—Track or way oblique to path of gripping member

Definitions

  • a driving-jack equipment for stepwise advancing a load along a support including gripping heads operable by means of an actuating cylinder and having each at least one set of gripping jaws engageable with said support, each set of said gripping jaws being loosely held in a cage between said support and a conical wedging surface for said gripping jaws.
  • This invention relates to a driving-jack equipment for stepwise advancing a load along a support, for instance a rod, a rope or the like, the said equipment having a cylinder and a piston relatively displaceable by means of pressure fluid admitted to the cylinder, and connected each to a gripping head.
  • Prior driving or lifting jacks of this type serve for advancing working platforms, slip forms and the like along scaffolding rods or poles.
  • the gripping heads of the prior driving or lifting jacks are not satisfactory for various reasons.
  • the gripping elements are balls or jaws of segment-shaped cross section inserted into the casing of the gripping head and urged against the conical end of the casing by spring action.
  • Gripping jaws of segment-shaped cross section are expensive whereas the driving force obtained with gripping balls is very limited if excessive local pressure against the rod or pole and consequently deformation of the latter is to be avoided. Further, it is difiicult or impossible to actuate gripping jaws loosely inserted into the gripping head by remote control means, but remote control of the gripping heads is necessary when double-acting jacks for producing driving forces in opposite directions are required.
  • Gripping heads with sets of gripping balls inserted in cages and adapted to be brought into an operable engaged position and into an inoperable disengaged position by remote control are known, but the balls are disadvantageous for the reasons set 'out above.
  • Gripping jaws having plane-parallel side surfaces are so cheap that it is not worth while to sharpen the gripping teeth of worn jaws, but it is cheaper to replace worn gripping jaws by new ones.
  • the sets of jaws inserted into a cage may properly be engaged and disengaged from the rod or pole by remote control, this possibility being of particular importance where driving forces in opposite directions are required.
  • the jack equipment broadly comprises a cylinder and a piston relatively displaceable by means of pressure fluid and connected each to a gripping head, a guiding extension at one end of said cylinder for guiding a tubular piston rod extend- 3,347,522 Patented Oct.
  • a casing having an end wall connected to the outer end of the piston rod with an annular space formed between said casing and piston rod, an end of said casing opposite said end wall being guided at the outside of said guiding extension, a free end face of said guiding extension in said annular space, and a pressure spring inserted between said end wall of the casing and said free end face of the guiding extension.
  • a driving jack adapted to produce driving forces in opposite directions is obtained when a double-acting actuating unit is combined with gripping heads including gripping jaws engageable and disengageable by remote control.
  • FIG. 1 shows a complete driving jack partially in elevation and partially in section
  • FIG. 2 shows a double-acting actuating unit
  • FIG. 3 shows a double-acting gripping head adapted for remote control
  • FIG. 4 is a single-acting gripping head adapted for remote control
  • FIG. 5 shows a set of gripping jaws in section
  • FIG. 6 is a top view of the set of FIG. 5 and FIGS. 7 to l0.show modified sets of gripping jaws.
  • the jack shown in FIG. 1 serves for lifting a load, for instance a working platform, a slip form of the like along a rod or pole 1.
  • the jack has a cylinder 2 to which a pressure fluid may be admitted through connection piece 3.
  • a piston 4 fixed to or made in one piece with a tubular piston rod 5 is inserted into the cylinder 2 and is axially displaceabie therein.
  • the free lower'end of the piston rod is interconnected with a cylindrical mantle 7 by means of a threaded sleeve 6 having a threaded flange.
  • An adjustable stop ring 8 is screwed to the upper end of the mantle 7.
  • the stop ring 8 is adapted for cooperation with a stop ring 9 screwed to the lower end of a cylindrical extension 44 of cylinder 2.
  • a pressure spring 10 is inserted between the stop ring 9 of the cylinder 2 and the radial flange of the sleeve 6.
  • An upper gripping head 11 is screwed to the upper end of cylinder 2, wherein gripping jaws 35 engage the upper conical portion of the inner suface of the gripping head 11 with their inclined wedge surfaces 12.
  • the construction of the set of gripping jaws will be explained in detail below.
  • a pressure spring inserted between a ring 17 screwed into and forming the bottom of the grip ping head 11 and a base portion of the set of gripping jaws maintains the wedge surfaces 12 of the gripping jaws in contact with the conical surface portion 13- of the gripping-head casing.
  • a similar gripping head 18 is screwed to the lower end of the mantle 7, this lower gripping head 18 being thus operatively connected to the lower end of the piston rod 5 by means of the mantle 7 and the sleeve 6.
  • Parts of the gripping head 18 are similarly designated as corresponding parts of the upper gripping head 11 and no further explanation is required.
  • a ring 19 of the lower gripping head 18 serves as a support for the load to be connected to the jack.
  • the driving jack shown in FIG. 1 operates as follows: In the position shown in FIG. 1 no pressure is admitted to the cylinder 2 so that the cylinder is maintained in its upper end position relatively to the piston 4 by pressure spring 10, this upper end position being determined by abutment of the ring 9 against the ring 8. The upper gripping head 11 is thus maintained in a lower end position relatively to the lower gripping head 18 by which the load is carried by wedging of its gripping jaws against the rod 1. Pressure is now admitted to the cylinder whereby the piston 4 is lifted relatively to the cylinder 2. The full load must now be carried by the upper gripping head because the lower gripping head with the load is lifted by the piston 4 interconnected with the lower gripping head by the piston rod 5, the sleeve 6 and the mantle 7.
  • the lifting stroke per operating cycle of the jack may be adjusted to a desired value. In this way it is possible to equalize the lifting stroke of a number of lifting jacks acting simultaneously on the same load, for instance a slip form.
  • the adjustable stop ring 8 as well as the other parts of the actuating mechanism or unit, viz. thecylinder 2 and the spring 10, are relatively easily accessible for maintenance or replacement. Moreover. these parts are perfectly protected against water and contamination by the tubular piston rod and parts 6 and 7 connected thereto separating them from the rod 1 so that humidity and contaminations cannot penetratae into the actuating mechanism from the rod 1.
  • the driving jack of FIG. 1 is able to produce forces in one direction only.
  • the load must be connected to the lower gripping head 18 and the load can only be pulled but not pushed upwardly because the upper gripping head 11 can only be lifted by the limited force produced by spring 10.
  • the jack shown in FIG. 1 will produce pushing and pulling forces in the same order so that the load may be connected to the lower or upper gripping headas desired.
  • the double acting actuating unit shown in FIG. 2 has an external thread at its upper end for screw-connection with the upper gripping head 11.
  • the lower end of the piston rod 5, not completely shown in FIG. 2 is connected to themantle 7 in the manner shown in FIG. 1.
  • the piston 4a is disposed below the upper end of the piston rod, and sealing rings are provided ateach side of the piston and at each end of the cylinder.
  • Connecting pieces 3a and 3b respectively are provided at each end of the cylinder so that pressure fluid may be admitted alternatively to the lower or upper side of the piston.
  • a driving jack assembled from a double-acting actuating unit according to FIG. 2 and of upper and lower gripping heads 11 and 18 as shown in FIG. 1 operates as follows: The lower end position of piston 4a as shown in FIG. 2 corresponds to the position shown in FIG. 1 wherein the piston is also shown in its lower end position. In this case the cylinder 2a with the upper gripping head 11 connected thereto is in an upper relative end position and the. load is carried by the lower gripping head. Pressure is now admitted to the lower connection piece 3a whereby the piston 4a and the parts connected thereto are lifted relatively to the cylinder 2 and the up-.
  • this head carries the load when the jack is in the initial position'as shown in FIG. 2. Pressure is now admitted to the lower connection piece 3a whereby the lower gripping head is pulled upwardly by the piston 4a. At the end of the stroke pressure is admitted to the upper end of the cylinder, whereby the upper gripping head is lifted relatively to the lower gripping head, the load is now carried by the lower gripping head and the upper gripping head with the load connected thereto is pushed upwardly.
  • the double-acting actuating 4 unit shown in FIG. 2 is combined with gripping heads as shown in FIGS. 3 and 4. :As shown in FIGS. 3 and 4 these gripping heads have suitable internal and external threads for connection to the cylinder 2 or 2a and to the mantle 7..
  • the upper gripping head shown in FIG. 3 has a cylindrical casing 20 forming the outer wall of an annular cylinder.
  • a ring 22 By means of a ring 22 an inner cylindrical mantle 21 is connected to the outer mantle 20.
  • Pressure fluid may simultaneously be admitted to the lower and upper cylinder space through a connection piece 23 and bores of the ring 22.
  • Annular pistons 24 and 25 having each a conicalcontrol surface 26 are accommodated in the upper and lower half of the cylinder.
  • Sets of gripping jaws 35 are inserted in opposite positions into each end of the gripping head 20, the structure of these sets of gripping jaws being shown in detail in FIGS. 5 and 6.
  • Each of the sets of gripping jaws has a cage 27 with an axial bore 28 having a diameter slightly exceeding the diameter of the rod 1.
  • the cage has an upper portion 29 having the shape ofa truncated cone and a cylindrical lower portion 30.
  • Thecage has six radial slots 31 with plane-parallel side surfaces, extending from the upper end of the cage to a relatively thin'base portion of the cage.
  • An annular groove .32 is cut between the upper conical portion and the lower cylindrical portion of the cage, this groove receiving an open ring of a spring wire 33.
  • This wire 33 passes through openings 34 of the gripping jaws 35.
  • These jaws have plane-parallel side surfaces and are held with little clearance in the slots 31.
  • the gripping jaws have a toothing 36 at the inner edge surface and inclined outer wedging edge surfaces, the inclination of the wedging surfaces corresponding to the inclination of the conical control surfaces 26 of the pistons 24 and 25.
  • the sets of gripping jaws shown in FIGS. 5 and 6 are particularly advantageous: in thatthe gripping jaws. having plane-parallel surfaces may be produced at such low costs that sharpening of the toothing 36 does not pay and worn jaws may simply be replaced by new ones.
  • Replacing of the jaws is very simple because it is only necessary to Widen the wire sufficiently for axially removing it from the groove 32, whereafter the jaws 35 may be stripped 0d the wire and new jaws may he slid onto the wire which is then inserted into the groove 32 after insertion of each jaw into a slot of the cage.
  • the upper set of gripping jaws of FIG. 3 abuts against a cap nut 38 and the lower set of gripping jaws 27 abuts against the face 39 of the ring 40 of the cylinder 2a screwed to the upper gripping head.
  • the lower gripping head 41 shown in FIG. 4 is similar to the upper gripping head 20 shown in FIG. 3, but it has only a single-acting cylinder operable by means of pressure fluid admitted through a connection piece 42 and a conduit not shown.
  • the piston 43 of this cylinder has a similar conicalzcontrol surface 26 for acting on the mclined wedge surfaces 37 of the set of gripping jaws 27.
  • the set of gripping jaws 27 abuts against a threaded ring screwed into the lower end of the mantle 41 of the gripping head.
  • the driving-jack equipment having a double acting actuating unit-as shown in FIG. 2 and an upper and lower gripping head as shown in FIGS. 3 and 4 respectively operates as follows:
  • the advancing direction of the jack along the rod 1 may be reversed by reversing the cycle of pressure admittance to the gripping heads, this needing no further explanation.
  • the same forces may be obtained in both directions when the forces acting downwardly are produced by the gripping head 20 (FIG. 3) having two oppositely directed sets of gripping jaws. In this case the load should be connected to the lower gripping head 41. Otherwise, that is when no or limited forces in downward direction are required, the load may be connected to any one of the heads 20 or 41. With the double-acting cylinder shown in FIG. 2 the spring may be omitted.
  • the actuating units shown in FIGS. 1 and 2 are suitable for control with oil or water.
  • the units are suitable for operation with water due to the fact that the cylinder 2 is completely separated from the casing enclosing the spring 10.
  • the piston rod is guided in a relatively long guiding extension 44 of the cylinder whereby it is extremely improbable that water would leak through the sealing ring of the piston rod and along the latter into the spring casing.
  • a bayonet joint may be used.
  • the sets of gripping jaws and the associated springs 16 may be supported on or may be connected to disks similar to the ring 17 (FIG. 1), such disks being removably mounted between the actuating units and the gripping heads without screw fixing, whereby exchange of worn sets of gripping jaws is further facilitated.
  • Opposite ends of each spring 16 may be attached to such a disk and to the cage 27 of the associated set of gripping jaws respectively.
  • the gripping jaws 135 and the cage 127 have an annular groove 136 in their upper portion and a wire ring 137 is inserted into the groove 136 for preventing tilting of the jaws inwardly into the bore of the cage, whereby insertion of the rod 1 into the jack cannot be hindered by tilted gripping jaws.
  • the gripping jaws are prevented from tilting by cams or ribs 237 projecting from the side surfaces of the slots 231 of the cage 227 and engage grooves 236 of the jaws 235. Since the radial width of the grooves 235 exceeds the radial width of the cams 237 limited axial displacement of the gripping jaws in the cage is possible so that the jaws may always be clamped against the rod 1 independently of differences in the dimensions of the rod 1.
  • a small pressure spring 238 inserted into a recess of the base of the cage 227 acts on each of the gripping jaws for continuously maintaining each jaw in contact with the conical surface 13 and with the rod 1 respectively.
  • a driving-jack equipment for stepwise advancing of a load along a support, comprising a cylinder and a piston relatively displaceable by means of pressure fluid, gripping heads on each of the cylinder and piston, said piston having a tubular piston rod, a guiding extension at one end of said cylinder for guiding said tubular piston rod extending through said guiding projection, a casing having an end wall connected to the outer end of the piston rod with an annular space formed between said casing and piston rod, an end of said casing opposite said end wall being guided at the outside of said guiding extension, a free end face of said guiding extension in said annular space, and a pressure spring inserted between said end wall of the casing and said free end face of the guiding extension.
  • An equipment comprising a guide ring on said casing slidably engaging the outer surface of said guiding extension and axially adjustable on said casing, and a stop ring connected to the free end of the guiding extension, said guide ring and stop ring constituting an adjustable stop means for limiting the relative displacement of said casing and guiding extension respectively.
  • a driving-jack equipment for stepwise advancing a load along a support comprising a cylinder and a piston relatively displaceable by means of pressure fluid, and a gripping head connected to each said cylinder and piston in surrounding relation to said support, each of said grip ping heads having at least one set of gripping jaws disposed around said support and having plane-parallel side surfaces, an inner toothed gripping surface and an outer wedging surface, each said gripping head having a conical wedging surface outside said outer wedging surface of the respective gripping jaws, each said head including an annular cage cooperative with said jaws and having radial slots with plane-parallel surfaces, said gripping jaws being movable in said slots with their plane-parallel side surfaces adjacent said slot plane-parallel surfaces to enable said jaws to be radially wedged between said wedging surface and said support.
  • said cage includes a portion having the shape of a truncated cone, the inclination of said conical wedging surface, said wedging surfaces of the gripping jaw-s and of said cage portion being equal, and said wedging surfaces of the gripping jaws engaging said conical wedging surface outside said cage portion.
  • each of said gripping jaws has at least one bore and said cage has at least one annular groove, an anchoring wire ring extending through said bores of all gripping jaws of a set of gripping jaws and the annular groove of said cage.
  • An equipment comprising a double-acting cylinder, a first gripping head having two sets of gripping jaws acting in opposite direction and engageable by remote control, and a second gripping head having one set of gripping jaws engageable by remote control, positive advance being possible in each direction along said support due to said double-acting cylinder and said first gripping head.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)
US541181A 1965-04-28 1966-04-08 Step-by-step driving-jack Expired - Lifetime US3347522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH586865A CH440617A (de) 1965-04-28 1965-04-28 Antriebsausrüstung

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US3347522A true US3347522A (en) 1967-10-17

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US541181A Expired - Lifetime US3347522A (en) 1965-04-28 1966-04-08 Step-by-step driving-jack

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US (1) US3347522A (cs)
BE (1) BE680170A (cs)
CH (1) CH440617A (cs)
DE (1) DE1279299B (cs)
NL (1) NL6604970A (cs)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3637189A (en) * 1970-05-26 1972-01-25 Kawatetsu Kizai Kogyo Co Oil pressure jack for lifting operation
US3673754A (en) * 1969-07-18 1972-07-04 Kawatetsu Kizai Kogyo Co Lift up process
US3685801A (en) * 1969-12-22 1972-08-22 Ahlgren Nils H Jack assemblies
US3948483A (en) * 1974-01-31 1976-04-06 Le Ciment Arme Demay Freres Sliding shuttering raising device for the continuous production of partitions and shuttering fitted with this device
US3964119A (en) * 1974-05-11 1976-06-22 Dr. -Ing. H.C.F. Porsche Aktiengesellschaft Support leg for bridges
US4067448A (en) * 1975-05-19 1978-01-10 Luke Bourgeois Lift and supporting system
US4270379A (en) * 1979-05-03 1981-06-02 Brammall, Inc. Roll straightening tool
FR2496074A1 (fr) * 1980-12-16 1982-06-18 Laplante Gilbert Installation motrice a verins pour produire le deplacement continu d'un objet oblong dans la direction de son axe, et/ou pour mouvoir un element le long dudit objet
EP0338611A1 (en) * 1988-04-07 1989-10-25 P. BOER & ZN. B.V. Apparatus for clamping a pipe or tube
DE202011106421U1 (de) * 2011-10-07 2012-10-12 Frimo Group Gmbh Klemmeinheit und Klemmsystem

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2554112C2 (de) * 1975-12-02 1983-05-05 Bauunternehmung E. Heitkamp Gmbh, 4690 Herne Vorrichtung zum Vorschub schwerer Lasten, insbesondere von Brücken oder Brückenplatten
SE449608B (sv) * 1983-11-25 1987-05-11 Keller Konsult Ab Griporgan for forflyttning av tunga laster
DD233744A3 (de) * 1984-01-24 1986-03-12 Bauakademie Ddr Hydraulische seilzugvorrichtung

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US1159096A (en) * 1913-07-28 1915-11-02 Clark F Rigby Clamp for well-drilling cables.
US1400701A (en) * 1917-07-30 1921-12-20 Lucey Mfg Corp Automatic slip for well-boring apparatus
US1508661A (en) * 1921-01-03 1924-09-16 Gerald R Livergood Pipe holder
US1730619A (en) * 1929-01-22 1929-10-08 William J Mitchell Drill rod clamp
US1817467A (en) * 1930-11-03 1931-08-04 Walter N Thompson Feed for well drilling tools
US2534213A (en) * 1946-06-24 1950-12-19 George E Failing Supply Compan Pulldown device for rotary drilling apparatus
US2756019A (en) * 1947-10-23 1956-07-24 Lindman Hydraulic or pneumatic form lifter
US2874437A (en) * 1955-03-28 1959-02-24 Cameron Iron Works Inc Pipe hanging apparatus
US2902256A (en) * 1956-07-25 1959-09-01 Byggforbattring Ab Hydraulic jack for raising concrete forms
US3117485A (en) * 1960-06-22 1964-01-14 Jansen Gerhart Clamp nut device

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DE25847C (de) * Dr. PIPER, Gymnasiallehrer in Lemgo, Lippe-Detmold Logarithmischer Rechen-Apparat
DE400705C (de) * 1921-08-28 1924-08-21 Idea Ges M B H Selbstspannendes Klemmfutter fuer stabfoermige Werkstuecke
US1895132A (en) * 1929-10-21 1933-01-24 Burt S Minor Snubbing device for oil well tubing
DE925193C (de) * 1947-10-23 1955-03-14 Emrik Ivar Dipl-Ing Lindmann Verbesserung an hydraulischen oder pneumatischen Kletter-Haltern, insbesondere fuer Betonformen
GB949420A (en) * 1961-05-17 1964-02-12 Byggforbattring Ab Improvements in jacks

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1159096A (en) * 1913-07-28 1915-11-02 Clark F Rigby Clamp for well-drilling cables.
US1400701A (en) * 1917-07-30 1921-12-20 Lucey Mfg Corp Automatic slip for well-boring apparatus
US1508661A (en) * 1921-01-03 1924-09-16 Gerald R Livergood Pipe holder
US1730619A (en) * 1929-01-22 1929-10-08 William J Mitchell Drill rod clamp
US1817467A (en) * 1930-11-03 1931-08-04 Walter N Thompson Feed for well drilling tools
US2534213A (en) * 1946-06-24 1950-12-19 George E Failing Supply Compan Pulldown device for rotary drilling apparatus
US2756019A (en) * 1947-10-23 1956-07-24 Lindman Hydraulic or pneumatic form lifter
US2874437A (en) * 1955-03-28 1959-02-24 Cameron Iron Works Inc Pipe hanging apparatus
US2902256A (en) * 1956-07-25 1959-09-01 Byggforbattring Ab Hydraulic jack for raising concrete forms
US3117485A (en) * 1960-06-22 1964-01-14 Jansen Gerhart Clamp nut device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673754A (en) * 1969-07-18 1972-07-04 Kawatetsu Kizai Kogyo Co Lift up process
US3685801A (en) * 1969-12-22 1972-08-22 Ahlgren Nils H Jack assemblies
US3637189A (en) * 1970-05-26 1972-01-25 Kawatetsu Kizai Kogyo Co Oil pressure jack for lifting operation
US3948483A (en) * 1974-01-31 1976-04-06 Le Ciment Arme Demay Freres Sliding shuttering raising device for the continuous production of partitions and shuttering fitted with this device
US3964119A (en) * 1974-05-11 1976-06-22 Dr. -Ing. H.C.F. Porsche Aktiengesellschaft Support leg for bridges
US4067448A (en) * 1975-05-19 1978-01-10 Luke Bourgeois Lift and supporting system
US4270379A (en) * 1979-05-03 1981-06-02 Brammall, Inc. Roll straightening tool
FR2496074A1 (fr) * 1980-12-16 1982-06-18 Laplante Gilbert Installation motrice a verins pour produire le deplacement continu d'un objet oblong dans la direction de son axe, et/ou pour mouvoir un element le long dudit objet
EP0054477A1 (fr) * 1980-12-16 1982-06-23 Compagnie Francaise D'entreprises Metalliques Installation motrice à vérins pour produire le déplacement continu d'un objet oblong dans la direction de son axe, et/ou pour mouvoir un élément le long dudit objet
EP0338611A1 (en) * 1988-04-07 1989-10-25 P. BOER & ZN. B.V. Apparatus for clamping a pipe or tube
DE202011106421U1 (de) * 2011-10-07 2012-10-12 Frimo Group Gmbh Klemmeinheit und Klemmsystem

Also Published As

Publication number Publication date
NL6604970A (cs) 1966-10-31
DE1279299B (de) 1968-10-03
BE680170A (cs) 1966-10-03
CH440617A (de) 1967-07-31

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