WO2004101915A1 - Ensemble bride de fixation de tige - Google Patents

Ensemble bride de fixation de tige Download PDF

Info

Publication number
WO2004101915A1
WO2004101915A1 PCT/NZ2004/000090 NZ2004000090W WO2004101915A1 WO 2004101915 A1 WO2004101915 A1 WO 2004101915A1 NZ 2004000090 W NZ2004000090 W NZ 2004000090W WO 2004101915 A1 WO2004101915 A1 WO 2004101915A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
tubular member
clamp assembly
clamping means
shaft clamp
Prior art date
Application number
PCT/NZ2004/000090
Other languages
English (en)
Inventor
Wayne Peter Killip
Original Assignee
Wayne Peter Killip
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 Wayne Peter Killip filed Critical Wayne Peter Killip
Priority to US10/556,821 priority Critical patent/US20070107170A1/en
Publication of WO2004101915A1 publication Critical patent/WO2004101915A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
    • F16B2/065—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using screw-thread elements
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
    • A45B25/00—Details of umbrellas
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B37/00—Tables adapted for other particular purposes
    • A47B37/04—Tables specially adapted for use in the garden or otherwise in the open air, e.g. with means for holding umbrellas or umbrella-like sunshades
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
    • A45B11/00—Umbrellas characterised by their shape or attachment
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
    • A45B2200/00—Details not otherwise provided for in A45B
    • A45B2200/10—Umbrellas; Sunshades
    • A45B2200/1009—Umbrellas; Sunshades combined with other objects
    • A45B2200/1063—Umbrellas; Sunshades combined with other objects with tables
    • 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.
    • Y10T24/34—Combined diverse multipart fasteners
    • Y10T24/3427—Clasp
    • Y10T24/3449—Clasp and hook
    • Y10T24/3453—Clasp and hook having gripping configuration on clasp jaw

Definitions

  • This invention relates to a shaft clamp assembly, in particular, but not exclusively to a shaft clamp assembly for securing the shaft of a sun umbrella or weather screen to a supporting structure.
  • Increasingly weather screens are used in outdoor settings, for example street-side cafes, restaurant lawns, fairs, picnics and barbecues. They provide shelter from the sun or rain, and often also complement the appearance of a table setting, or even provide a means for displaying advertising.
  • umbrellas are held steady by inserting the lower end of the main shaft into the ground. This is often difficult to do, and in any case the ground often provides a poor support for the umbrella.
  • bracket designs In addition to heavy base blocks, or holes in the ground, some bracket designs have been produced which comprise a circular tube in which the shaft of an umbrella is clamped.
  • the forces acting on the body of the umbrella are often significant, and these brackets are often inadequate to support an umbrella in even light wind conditions. It is too easy for an umbrella shaft which is clamped into a circular tube to pivot a little about the clamp and to move. This often results in damage or wearing of the shaft, and excessive movement of the umbrella canopy.
  • umbrellas that are used with an item of furniture pass through a designated aperture in the furniture, and can gain some support from the furniture.
  • umbrellas that are used with items of furniture in this way are still prone to a degree of instability.
  • Umbrellas can fly right out of a table setting in a gust of wind, or blow over.
  • umbrellas used in conjunction with tables are cumbersome to move. For example, if a street cafe owner wants to move a table around, he must struggle to move the table, the umbrella, and its base at the same time, or else dis-assemble the three items and move them separately. This process is difficult and may damage one or other of the table, umbrella or base, and in any event it is time consuming.
  • the commonly used base blocks used with umbrellas can be unsightly and intrusive in a table setting. They can severely restrict foot-room under a table, and can make it difficult to stow chairs under a table when the table is not in use.
  • the invention may broadly be said to provide a shaft clamp assembly comprising a bracket having a tubular member adapted to receive a shaft, means for mounting the tubular member to a structure, and clamping means, the clamping means being operable to secure the shaft to the tubular member, and wherein the internal wall of the tubular member is provided with at least two shaft contact surfaces, their arrangement being such that a polygon of forces is generated between the clamping means and the shaft contact surfaces to secure the shaft to the tubular member when the clamping means is operated.
  • the polygon of forces is a triangle of forces.
  • the tubular member comprises a tube having a substantially triangular cross section.
  • each apex of the substantially triangular cross section is less than the radius of a shaft which is to be supported by the shaft clamp assembly.
  • the clamping means includes at least one mechanism which is adapted to exert pressure on the shaft to push the shaft into contact with at least two contact surfaces on the internal wall of the tubular member.
  • tubular member is provided with reinforcing members.
  • the shaft contact surfaces are provided with reinforcing members.
  • the reinforcing members form part of the means for mounting the tubular member to a structure.
  • the means to grip the shaft could include at least one lever and cam arrangement to exert pressure onto the side of the shaft of an umbrella, to clamp it within the tube.
  • the clamping means includes at least one threaded shaft or rod, which is adapted to engage with a mating thread associated with the tubular member.
  • the portion of the clamping means which contacts or grips the shaft incorporates a resilient member.
  • the thread associated with the tubular member further passes through one of the reinforcing members.
  • the means for mounting the tubular member to a structure could include gusset pieces which are attachable to both the tubular member and to the structure, or it could include a substantially rigid plate or plates securely attached to the tubular member.
  • the means for mounting the tubular member to a structure comprises at least one strut.
  • each strut is provided with means to secure one end of each strut to a support.
  • each strut More preferably said means to secure one end of each strut to a support is holes in a tab portion of the or each strut.
  • the shaft clamp assembly can be made from plastics material, however, preferably the shaft clamp assembly is primarily made from a metal or metal alloy.
  • the invention may broadly be said to consist in an item of furniture, incorporating a shaft clamp assembly substantially as specified herein.
  • an aperture in the item of furniture need not necessarily be substantially centrally located, within for example a table top.
  • the item of furniture and umbrella can be re-orientated to achieve optimum protection for the users as the sun moves or the direction of rain changes.
  • Such an arrangement is. particularly useful if the umbrella is not a hinged umbrella. It will be realised that such a process will be far harder to achieve using some of the prior art arrangements, for example if a heavy base member were used to support the umbrella.
  • the invention may broadly be said to consist in an item of furniture and an umbrella shaft and/or an umbrella incorporating a shaft clamp assembly substantially as specified herein.
  • the invention may also broadly be said to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of the parts, elements or features, and where specific integers are mentioned herein which have known equivalents, such equivalents are incorporated herein as if they were individually set forth.
  • FIGURE 1 is a perspective view of a shaft clamp assembly
  • FIGURE 2 is a side elevation of the shaft clamp assembly
  • FIGURES 3, 3a and 3b are respectively a cross sectional view through the clamping means of the shaft clamp assembly, a vector diagram showing a triangle of forces and a cross section of the end of the clamping means,
  • FIGURE 4 is a perspective view of an item of furniture fitted with the shaft clamp assembly, complete with an umbrella installed,
  • FIGURE 5 is a perspective view showing the use of the shaft clamp assembly to support a sun umbrella on a solid foundation, and the use of a second shaft clamp assembly to support a table top from the shaft of an umbrella, and
  • FIGURE 6 is a perspective view showing the use of the shaft clamp assembly to support a clothesline.
  • a shaft clamp assembly (10) comprising at least a tubular member (11) of substantially uniform thickness, three struts (13), and a pair of clamping means (15).
  • the tubular member (11) is formed from a substantially triangular cross sectioned tube having three distinct flat side walls, and curved apexes.
  • Each clamping means (15) comprises a threaded rod (17) the proximal end of which is secured to the centre of a knob (19).
  • the threaded rod (17) engages with a mating thread which is formed in one of the flat side walls of the tubular member (11).
  • the arrangement of the struts (13) is such that an elongate portion of each strut (13) provides reinforcement for each respective flat side wall of the tubular member (11).
  • the mating thread extends through this reinforcement portion of one of the struts (13) providing a longer and therefore stronger mating thread.
  • the struts (13) are used as a means for mounting the tubular member (11) to a structure.
  • struts (13) have been used in this example, a variety of means for mounting the tubular member (11) to a structure could be used, for example, a flat plate which is welded to the tubular member (11).
  • the struts (13) are formed from a flat bar section and are each attached by welding to the exterior surface of a flat side wall of the tubular member (11), the welded attachment extending along the majority of the length of the tubular member (11). Such an attachment means that part of each strut (13) is able to reinforce the tubular member (11).
  • the free ends of the struts (13) are further provided with tabs or feet (25), and each of the feet (25) have five drilled holes (27) for the insertion of bolts or screws when fastening the shaft clamp assembly (10) to a structure.
  • While the invention is not limited to the use of three struts (13), this number of struts (13) is advantageous because the shaft clamp assembly (10) will not tend to wobble if fitted to a surface of a structure that is not perfectly flat, for example when fitted to the under surface of a table where the table top has been manufactured from different thicknesses of wood.
  • the shaft (31) of an umbrella (31) can be inserted as shown into the tubular member (11) and secured using the clamping means (15). It is secured by turning one and preferably both of the knobs (19) and winding the threaded rods (17) towards the shaft (31) so that the ends (33) of the rods (17) push against the shaft (31) thereby clamping the shaft (31) between the rod (17) and a first and a second shaft contact surface (35) and (37) of the tubular member (11).
  • the first and second shaft contact surfaces (35) and (37) are the internal faces of the two flat side walls of the tubular member (11) which do not contain the rod (17).
  • Figure 3 a shows a triangle of forces which exists when the shaft (31) is clamped within the tubular member (11).
  • Vector (17a) represents the force exerted by the threaded rod (17)
  • vector (35 a) represents the reaction force exerted by the shaft contact surface (35)
  • vector (37a) represents the reaction force exerted by the shaft contact surface (37).
  • the tubular member (11) in this example has a triangular cross section which is similar to an equilateral triangle, that is, it has three flat side walls which are each arranged at sixty degrees to one another. For this reason, the triangle of forces, in which each individual force acts at ninety degrees to their respective flat side wall, is also a triangle with vectors at sixty degrees to one another.
  • the triangular cross sectioned tubular member (11) as shown in Figure 3 has been found to produce a very effective clamp for the purpose of securing a sun umbrella.
  • the shaft (31) of the umbrella is held securely along the length of the tubular member (11) since the shaft (31) is effectively wedged into a comer along the length of the triangular tubular member (11).
  • Even if only a single clamping means (15) is used, the shaft (31) is constrained along two distinct lines, which are the lines of contact between the shaft (31) and the first and second contact surfaces (35) and (37) of the interior of the tubular member (11). These lines of constraint partially oppose one another.
  • a reaction force acts from each partially opposing line of constraint. These forces in combination with a third opposing force exerted by the clamping means (15) produce the triangle of forces which is exerted onto the shaft (31).
  • the triangle of forces act to largely eliminate any tendency for the shaft (31) to rock or move within the shaft clamp assembly (10) when external loads are applied to the shaft (31). It is believed that this greatly improved constraint of the shaft (31) is not experienced with prior art shaft clamp assemblies which are most commonly formed using a tubular member which has a circular cross section. Where the tubular member has a circular cross section, there is typically only a single line of contact between a shaft and the tubular member, and for this reason the shaft is able to rock or move within the tubular member with relative ease. And since the shafts of sun umbrellas experience relative large forces due to the effects of wind loads on the canopy of the umbrella, the restraint of the shaft within a shaft clamp assembly is important.
  • the shaft clamp assembly (10) will work well with only one clamping means (15), there is an advantage in providing two or more clamping means (15). If two clamping means (15) are used, one can be positioned towards each end of the tubular member (11) to further improve the ability of the shaft clamp assembly (10) to firmly attach to a shaft, with very little possibility of the shaft rocking or moving in any axis within the shaft clamp assembly (10).
  • the clamping means (15) is in the form of a threaded rod (17) and a knob (19), but clearly many other types of clamping means could be used, for example a lever and cam arrangement.
  • the clamping means (15) used in the example is advantageous in that it is simple, and it can be used to clamp against shafts of varying diameters without the need for any adjustment of the clamping means.
  • Figure 3b shows an optional arrangement of the distal or free end (33) of the threaded rod (17).
  • a concentric hole is formed in the free end (33) of the threaded rod (17), and a complimentary mating "T" shaped plug (34) which is made of a suitable resilient material is inserted into the hole.
  • the plug (34) covers the free end (33) and helps to minimise damage to the surface of a constrained shaft (31), which may otherwise be caused by the free end (33) of the threaded rod (17) when the shaft clamp assembly (10) is in use.
  • the plug (34) is made from a plastics material.
  • a shaft clamp assembly (10) is shown fitted to the underside surface of an outdoor table (39).
  • the shaft (31) of the umbrella (41) passes through an aperture (43) substantially centrally located within the table top (45) and the shaft (31) is rigidly secured in the shaft clamp assembly (10).
  • the assembly of the table (39), shaft clamp assembly (10) and umbrella (41) has improved resistance to light winds, can easily be moved as an assembly, and provides good leg and foot room under the table.
  • the aperture (43) in the table top, and the shaft clamp assembly (10) were situated offset from the centre of the table (39), the table (39) could be orientated to give the best shelter, depending on the angle of the sun, or the direction of the rain.
  • a first shaft clamp assembly (10) is used to secure the shaft (10) of an umbrella (41) to a support (60).
  • the support (60) can take many forms, for example a plinth, a concrete foundation, or a handrail, etc.
  • a second shaft clamp assembly (10) is used to secure a table top or platform (47) to the shaft (31) of an umbrella.
  • the table top or platform (47) can be mounted at any height above the ground to form a table for a range of purposes, for example a table to lean on, a table to sit at, or a drinks table to use whilst seated on the ground.
  • a shaft clamp assembly (10) is used to attach a shaft (49) of a clothesline (51) to a support (not shown).
  • At least the preferred form of the invention provides a shaft clamp assembly (10) that is capable of securing the shaft of an umbrella (41) to an item of furniture (39), such that the umbrella (41) has good stability, the item of furniture (39) can be moved with relative ease.
  • a shaft clamp assembly (10) that is capable of securing the shaft of an umbrella (41) to an item of furniture (39), such that the umbrella (41) has good stability, the item of furniture (39) can be moved with relative ease.
  • the shaft clamp assembly (10) is also very versatile and can be used to support the shafts of a range of items, such as clotheslines, banners, signposts, and it can equally be used to secure an item to a shaft, such as a table top, a light, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Holders For Apparel And Elements Relating To Apparel (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)

Abstract

La présente invention concerne un ensemble bride de fixation de tige (10) qui comprend : une bride comportant un élément tubulaire apte à recevoir une tige, par exemple la tige d'un parasol ; des moyens permettant de monter l'élément tubulaire (11) sur une structure, par exemple une table ; et des moyens de serrage (15), les moyens de serrage servant à fixer la tige dans l'élément tubulaire, et la paroi interne de l'élément tubulaire comprenant au moins deux surfaces de contact avec la tige, dont l'agencement est tel qu'il se produit entre les moyens de serrage et les surfaces de contact avec la tige un triangle de forces qui fixe la tige dans l'élément tubulaire lorsque les moyens de serrage sont actionnés.
PCT/NZ2004/000090 2003-05-15 2004-05-17 Ensemble bride de fixation de tige WO2004101915A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/556,821 US20070107170A1 (en) 2003-05-15 2004-05-17 Shaft clamp assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ525896 2003-05-15
NZ52589603 2003-05-15

Publications (1)

Publication Number Publication Date
WO2004101915A1 true WO2004101915A1 (fr) 2004-11-25

Family

ID=33448573

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2004/000090 WO2004101915A1 (fr) 2003-05-15 2004-05-17 Ensemble bride de fixation de tige

Country Status (2)

Country Link
US (1) US20070107170A1 (fr)
WO (1) WO2004101915A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2496853A (en) * 2011-11-22 2013-05-29 Mark Green A pole bracket for mounting articles onto a tent pole
ITVA20130052A1 (it) * 2013-09-16 2015-03-17 Lino Alioli Sospensione universale per sistemi alimentati elettricamente
US9200655B2 (en) 2013-08-27 2015-12-01 Sunjoy Industries Group Ltd. Pole securement sleeve and an umbrella base assembly including the same
US11064693B2 (en) * 2017-07-21 2021-07-20 Pick Outdoors LLC Deer attraction device
US11946271B2 (en) 2021-07-27 2024-04-02 Patio Leash Llc Umbrella base

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10288987B2 (en) * 2016-12-09 2019-05-14 Moises H Olmos-Calderon Tripod accessory clamp
US11221147B2 (en) * 2019-06-04 2022-01-11 P.R.E. Sales Inc. Collapsible radiative heater assembly and methods for assembly and use
US11866952B2 (en) * 2022-02-09 2024-01-09 Ray Eriks Umbrella shaft supporting stand and method of installation between parallel joists

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0094122B1 (fr) * 1982-05-06 1986-07-30 Erico Europa B.V. Collier
EP0625662A1 (fr) * 1993-05-19 1994-11-23 General Electric Company Dispositif de fixation et de serrage d'un objet tubulaire
US20020088096A1 (en) * 2001-01-11 2002-07-11 Crispin James V-lock

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FR2487182A1 (fr) * 1980-07-22 1982-01-29 Clairitex Expl Bague de serrage pour parasol
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US20020036008A1 (en) * 2000-09-28 2002-03-28 Hickam John H. Umbrella base stand and table
PT102751A (pt) * 2002-04-04 2003-10-31 Antonio Marino Naeff Ferreira Interface de suporte de antenas
US7086633B2 (en) * 2002-11-14 2006-08-08 Metro Industries Inc. Quick adjust support system with trapped or integral wedge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094122B1 (fr) * 1982-05-06 1986-07-30 Erico Europa B.V. Collier
EP0625662A1 (fr) * 1993-05-19 1994-11-23 General Electric Company Dispositif de fixation et de serrage d'un objet tubulaire
US20020088096A1 (en) * 2001-01-11 2002-07-11 Crispin James V-lock

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2496853A (en) * 2011-11-22 2013-05-29 Mark Green A pole bracket for mounting articles onto a tent pole
GB2496853B (en) * 2011-11-22 2019-03-20 Green Mark A pole bracket
US9200655B2 (en) 2013-08-27 2015-12-01 Sunjoy Industries Group Ltd. Pole securement sleeve and an umbrella base assembly including the same
ITVA20130052A1 (it) * 2013-09-16 2015-03-17 Lino Alioli Sospensione universale per sistemi alimentati elettricamente
US11064693B2 (en) * 2017-07-21 2021-07-20 Pick Outdoors LLC Deer attraction device
US11632947B2 (en) 2017-07-21 2023-04-25 Pick Outdoors LLC Deer attraction device
US11946271B2 (en) 2021-07-27 2024-04-02 Patio Leash Llc Umbrella base

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