WO2004051095A1 - Clamp - Google Patents
Clamp Download PDFInfo
- Publication number
- WO2004051095A1 WO2004051095A1 PCT/GB2003/005184 GB0305184W WO2004051095A1 WO 2004051095 A1 WO2004051095 A1 WO 2004051095A1 GB 0305184 W GB0305184 W GB 0305184W WO 2004051095 A1 WO2004051095 A1 WO 2004051095A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- jaw
- clamp
- linear displacement
- contact surfaces
- reentrant
- Prior art date
Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 71
- 238000000926 separation method Methods 0.000 claims abstract description 33
- 239000000725 suspension Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims description 7
- 230000001419 dependent effect Effects 0.000 description 16
- 230000000694 effects Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 241001417534 Lutjanidae Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/10—Arrangements for positively actuating jaws using screws
- B25B5/101—C-clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/10—Arrangements for positively actuating jaws using screws
- B25B5/102—Arrangements for positively actuating jaws using screws with at least one jaw sliding along a bar
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B1/00—Vices
- B25B1/06—Arrangements for positively actuating jaws
- B25B1/10—Arrangements for positively actuating jaws using screws
- B25B1/103—Arrangements for positively actuating jaws using screws with one screw perpendicular to the jaw faces, e.g. a differential or telescopic screw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/16—Details, e.g. jaws, jaw attachments
- B25B5/163—Jaws or jaw attachments
-
- 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
-
- 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
- F16B2/12—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 sliding jaws
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/24—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with a special member for attachment to profiled girders
-
- 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
- Y10T403/59—Manually releaseable latch type
Definitions
- the present invention relates to a clamp for suspending a utility component from a structural element (such as a beam) comprising first and second jaws having opposing contact surfaces which are relatively substantially linearly displaceable.
- a conventional beam or flange clamp for suspending a utility component from a structural element such as a beam comprises a main body which is drilled or tapped at its rear portion in order to secure a drop rod outside and separate to the clamping region by means of rivets or bolts.
- the operation of this clamp is illustrated schematically in Figures la and lb.
- a beam (or flange thereof) 7 is inserted in jaws 1 and clamped directly by appropriate manipulation of cup point set screw 2 and locking nut 3.
- a rear portion of the main body 5 is provided with a tapped or clear hole 4 for securing a threaded or non-threaded drop rod respectively (not shown in Figure la).
- Figure lb illustrates the use of the clamp with a J bolt 6 passing through hole 5 for suspension of (for example) pipework.
- the load bearing characteristics of the conventional clamp are largely unsatisfactory.
- a utility component suspended from the drop rod exerts a significant disruptive moment about the separate clamping region.
- the set screw bites into the tapered face of the flange (rather than the horizontal face) otherwise installation may fail.
- WO-A-00/52343 discloses a rigid clamp comprising two C-shaped plates whose respective ends are connected by a boss. Each boss defines a path for receiving a drop rod so that when the clamp is located on the beam, the drop rod is inserted into the lower boss and is secured to the underside of the beam. Thus the drop rod becomes a load bearing element acting directly at the clamping region.
- the present invention seeks to improve clamps by incorporating first and second jaws having opposing contact surfaces which are relatively substantially linearly displaceable causing them to close securely in a substantially parallel manner onto structural elements of varying thickness. More particularly, the present invention relates to a clamp incorporating first and second jaws having opposing contact surfaces which are relatively substantially linearly displaceable and which exhibits high load bearing capabilities.
- the present invention provides a clamp comprising: a first jaw and a second jaw having opposing contact surfaces which are relatively substantially linearly displaceable between a position of minimum separation and a position of maximum separation, wherein in use the opposing contact surfaces contact the lower surface and upper surface respectively of a structural element, wherein the first jaw incorporates a first aperture remote from the contact surface and adapted to receive a suspension element or fastener; one or more means for guiding the first jaw and the second jaw during relative substantially linear displacement such as to substantially prevent relative non-linear displacement of the opposing contact surfaces; and means for delimiting the substantially linear displacement of the opposing contact surfaces of the first jaw and second jaw to the position of maximum separation.
- the relative substantially linear displaceability of the first and second jaw advantageously makes the clamp suitable for high load uses.
- the structural element is typically a beam (or a flange thereof) for which the clamp may be able to withstand a load of 1000kg (or more).
- the suspension element is a drop rod but numerous other suspension elements (such as J-bolts, set screws, wire elements) may be used.
- suspension element may be suspended utility components such as fixing brackets, pipe supports, fire protection equipment, cable trays, cables, wires, electrical conduits, heating equipment, ventilating equipment or air conditioning equipment.
- the clamp of the invention may be furnished with one or more piercings, apertures, slots and tabs either for suspending directly any of the previous utility components or for suspending indirectly from conventional means any of the above-mentioned utility components (but especially electrical cables, pipes and wires from cable/wire clamps, clips and ties or hoses from snapper hose clamps).
- the first jaw comprises a first reentrant body and the second jaw comprises a second reentrant body.
- the first reentrant body is nested at least partially within the second reentrant body.
- the first reentrant body is symmetrically nested at least partially within the second reentrant body.
- the first reentrant body has a smaller overall dimension than the second reentrant body to enable it to be symmetrically nested at least partially within the second reentrant body.
- the depth of the second reentrant body determines the strength of this embodiment and it is preferred that the second reentrant body is deeper than the first reentrant body.
- the first reentrant body is also advantageous for the first reentrant body to be composed of a material which is sufficiently springy for it to be snugly symmetrically nested at least partially within the second reentrant body.
- the first reentrant body is composed of a material which is thinner than the material of which the second reentrant body is composed.
- the first reentrant body is asymmetrically nested at least partially within the second reentrant body.
- the asymmetrically nested arrangement permits the first and second jaw to be manufactured with a substantially identical profile with advantageous cost savings.
- each reentrant body has a base between substantially parallel opposed side walls (which may be the same or different), a leading edge (that of the first and second reentrant body together defining a mouth) and a trailing edge (that of the first and second reentrant body together defining an open rear end).
- the contact surface of the (eg the first) or each (ie the first and second) reentrant body has an extended inner edge which in use abuts a surface (eg the leading edge) of the structural element. This advantageously assists installation of the clamp by permitting the installer to push the extended inner edge against the leading edge of the structural element and steady the clamp for securement.
- the extended inner edge may adopt any shape but generally speaking will adopt a shape to conform to the leading edge of the beam. Since in most situations, the leading edge of the beam will be non-curved (eg square), the extended inner edge will be substantially perpendicular to the contact surface (and preferably extend substantially parallel to the direction of linear displacement).
- the first jaw comprises a first substantially U- shaped channel member and the second jaw comprises a second substantially U-shaped channel member.
- the leading edge of the second substantially U-shaped channel member may have a cut-away nose portion in its upper part.
- the leading edge of the first substantially U-shaped channel member may be chamfered or rounded into a "chin" in its lower part.
- the outer edge of the contact surface of either or (preferably) both of the first and second jaw is tapered or radiussed.
- a camming surface or camming surfaces
- the clamp of the invention may be advantageously secured to tapered upper and lower surfaces of the structural element.
- one or more faces of the first and/or second jaw may be ribbed or otherwise provided with strengthening means.
- the means for delimiting the substantially linear displacement of the opposing contact surfaces of the first jaw and second jaw to the position of maximum separation is generally located between the extended inner edge of the contact surface of the first and second jaw and the trailing edge of the first and second jaw.
- the means for delimiting the substantially linear displacement of the opposing contact surfaces of the first jaw and second jaw to the position of maximum separation and one of the means for guiding the first jaw and the second jaw during relative substantially linear displacement may be the same.
- the one or more means for guiding the first jaw and the second jaw during relative substantially linear displacement are generally located at or between the extended inner edge of the contact surface of the first and second jaw and the trailing edge of the first and second jaw. In this location, they serve to arrest rotational moments (ie rocking) created as a reaction to clamping forces as the clamp is tightened.
- a first means for guiding the first jaw and the second jaw during relative substantially linear displacement is located at or near to the extended inner edge of the contact surface of the first and second jaw.
- a second means for guiding the first jaw and the second jaw during relative substantially linear displacement is located at or near to the trailing edge of the first and second jaw.
- a first means for guiding the first jaw and the second jaw during relative substantially linear displacement is located at or near to the extended inner edge of the contact surface of the first and second jaw
- a second means for guiding the first jaw and the second jaw during relative substantially linear displacement is located at or near to the trailing edge of the first and second jaw
- a third means for guiding the first jaw and the second jaw during relative substantially linear displacement is located between the first and second means for guiding the first jaw and the second jaw during relative substantially linear displacement.
- One or more of the means for guiding the first jaw and the second jaw during relative substantially linear displacement comprises: male and female portions on the first jaw and second jaw slidably engageable in a direction parallel to the direction of linear displacement.
- the male and female portions comprise: either (1) at least a part of the trailing edge of the first reentrant body folded over at least a part of the trailing edge of the second reentrant body or (2) at least a part of the trailing edge of the second reentrant body folded over at least a part of the trailing edge of the first reentrant body.
- twin parts of the trailing edge of the second reentrant body extending parallel to the direction of linear displacement are folded over twin parts of the trailing edge of the first reentrant body extending parallel to the direction of linear displacement.
- the extent to which the twin parts of the trailing edge of the second reentrant body fold over twin parts of the trailing edge of the first reentrant body may vary the performance of the clamp. Generally it is preferred that the extent to which the twin parts of the trailing edge of the second reentrant body fold over the twin parts of the trailing edge of the first reentrant body is large (eg such that the twin parts of the trailing edge of the second reentrant body are (or are almost) touching).
- the extent to which the twin parts of the trailing edge of the second reentrant body fold over the twin parts of the trailing edge of the first reentrant body is such that the twin parts of the trailing edge of the second reentrant body are overbent (eg inwardly overbent) which advantageously gives a locking effect.
- the male and female portions comprise: one or more elongate discontinuities extending parallel to the direction of linear displacement in the side of the second jaw slidably engageable with one or more elongate discontinuities extending parallel to the direction of linear displacement in the side of the first jaw.
- the male and female portions comprise: first and second elongate discontinuities extending parallel to the direction of linear displacement in the opposing sides of the second jaw slidably engageable with first and second elongate discontinuities extending parallel to the direction of linear displacement in the opposing sides of the second jaw.
- Each elongate discontinuity may be an elongate depression in the exterior face of the side of the jaw. Preferred is a substantially V-shaped elongate depression.
- the male and female portions may be one or more (preferably two) tabs slidably engageable with one or more (preferably two) elongate surfaces, slots or apertures extending parallel to the direction of linear displacement.
- the tab is inwardly dependent from a side of the second jaw and is slidably engageable with an elongate aperture extending parallel to the direction of linear displacement in a side of the first jaw.
- first and second tabs are inwardly dependent from opposing sides of the second jaw and are respectively slidably engageable with first and second elongate apertures extending parallel to the direction of linear displacement in opposing sides of the first jaw.
- the axis of the or each inwardly dependent tab is typically substantially parallel to the direction of linear displacement.
- the elongate aperture determines the extent of relative substantially linear displacement of contact surfaces of the first and second jaw
- the tab is inwardly dependent from a side of the second jaw and is slidably engageable with the extended inner edge of the contact surface of the first jaw extending parallel to the direction of linear displacement.
- first and second tabs are inwardly dependent from opposing sides of the second jaw and are respectively slidably engageable with first and second portions of the extended inner edge of the contact surface of the first jaw extending parallel to the direction of linear displacement.
- the axis of the or each inwardly dependent tab is typically perpendicular to the direction of linear displacement.
- the tab is inwardly dependent from an edge (eg the edge between the extended inner edge and the trailing edge) of the second jaw and is slidably engageable with an elongate slot extending parallel to the direction of linear displacement in a side of the first jaw.
- a first tab is inwardly dependent from an edge (eg the edge between the extended inner edge and the trailing edge) of the second jaw and is slidably engageable with a first elongate slot extending parallel to the direction of linear displacement in a side of the first jaw and a second tab is inwardly dependent from an edge (eg the edge between the extended inner edge and the trailing edge) of the first jaw and is slidably engageable with a second elongate slot extending parallel to the direction of linear displacement in a side of the second jaw.
- the first and second tab to adopt a T-shaped profile so that the arms of the T extend beyond the edges of the elongate slot to provide a locking effect.
- the tabs engage the fastener or suspension element to withstand rocking.
- the elongate slot determines the extent of relative substantially linear displacement of contact surfaces of the first and second jaw (ie acts as the means for delimiting the substantially linear displacement of the opposing contact surfaces of the first jaw and second jaw to the position of maximum separation).
- An edge of the first and/or second jaw between the extended inner edge and the trailing edge preferably extends inwardly into a flange.
- the flange is adapted to be clear of the fastener or suspension element in effective use and for this purpose may be radiussed.
- the flange serves to engage the fastener or suspension element to withstand rocking.
- one or more of the means for guiding the first jaw and the second jaw during relative substantially linear displacement comprises: a securing member, wherein either (1) said securing member is secured to the first jaw and is slidably engageable with first and second collinear elongate apertures extending parallel to the direction of linear displacement in opposing sides of the second jaw or (2) said securing member is secured to the second jaw and is slidably engageable with first and second collinear elongate apertures extending parallel to the direction of linear displacement in opposing sides of the first jaw.
- the securing member is secured to the second jaw and is slidably engageable with first and second collinear elongate apertures extending parallel to the direction of linear displacement in opposing sides of the first jaw.
- the securing member may (for example) be a rivet passing through the collinear apertures and fixed in a conventional manner (eg passing through a hole in the side of the jaw and secured exteriorly).
- the clamp further comprises: biassing means for biassing the first jaw and second jaw towards the position of minimum separation.
- biassing means for biassing the first jaw and second jaw towards the position of minimum separation.
- the biassing means may be a resilient biassing means.
- the resilient biassing means may be a spring such as a compression or tensile spring (eg a coiled or flat spring), an elastomer or damping device.
- One end of the resilient biassing means may be fastened to one (or a part of one) of the means for guiding the first jaw and the second jaw during relative substantially linear displacement.
- the securing member is secured to the second jaw and is slidably engageable with first and second collinear elongate apertures extending parallel to the direction of linear displacement in opposing sides of the first jaw
- one end of the resilient biassing means is fastened to the securing member and the other to an interior surface of the first jaw (eg the base).
- the first jaw may incorporate a first aperture rearwardly or forwardly of the contact surface.
- the first jaw incorporates a first aperture rearwardly of the contact surface.
- the second jaw incorporates a second aperture substantially collinear with the first aperture, wherein the first and second aperture are adapted to receive the suspension element or fastener.
- the clamp of the invention may be secured to the structural element by passing the suspension element or fastener through the first aperture (and optionally the second aperture).
- the first and second aperture may be tapped or non-tapped to receive a threaded or non-threaded suspension element or fastener as desired.
- the (or each) nut may be a standard hexagonal nut.
- the (or each) nut may be a pressed steel nut (eg in the form of a u- shaped threaded clip which may be slid onto the base of the jaw over the aperture so as to position the thread either internally or externally).
- the (or each) nut may be a rivetted nut such as a RJV UTTM (eg a nut with a short tubular collar which may be tightly crimped, deformed or rivetted to attach to the jaw to form a female thread or may be loosely crimped, deformed or rivetted to attach to the jaw but remain rotatable).
- the material at the aperture may be deformed or shaped (eg by punching) to form the threaded portion.
- the aperture may be flow drilled (ie drilled using a special drill bit which generates frictional heat sufficient to render plastic the steel around the aperture so that it flows and deforms into a thin tube which may be tapped to form the threaded portion).
- the first aperture may be non-tapped and the suspension element or fastener may be fastened by a first hexagonal nut tightened against the exterior surface of the base of the first jaw and (optionally) a second hexagonal nut tightened against the interior surface of the base of the first jaw.
- the second aperture may be non-tapped and the suspension element or fastener may be fastened by a first hexagonal nut tightened against the exterior surface of the base of the second jaw and (optionally) a second hexagonal nut tightened against the interior surface of the base of the second jaw.
- the first aperture may be non- tapped and the second aperture may be punched or flow drilled to form the threaded portion or be provided with a nut (eg a pressed steel nut or rivetted nut).
- the fastener or suspension element passes through the first aperture and engages the second aperture so that subsequent rotation draws together the first and second jaws advantageously without the need for actuating tools such as spanners.
- the first aperture may be flow drilled to form the threaded portion or be provided with a tightly crimped rivetted nut and the second aperture may be provided with a loosely crimped, rotatable rivetted nut.
- the fastener or suspension element rotates through the first aperture and second aperture to the desired height from where the rotatable, rivetted nut may be rotated to draw together the first and second jaw.
- the contact surface of the first and second jaw will depend on the utility of the clamp. Where the structural element is a beam, the contact surface of the first jaw and second jaw is generally the surface of its edges (the “gums"). The edges may be rolled or folded to provide an enlarged contact surface in which there is advantageously reduced levels of localised stress.
- the whole or a portion of the contact surface of either or both of the first and second jaw may be toothed.
- the whole or a portion of the contact surface of either or both of the first and second jaw may be provided with a plurality of teeth (eg substantially V-shaped teeth (which may be angled or flattened) or substantially n-shaped teeth).
- the whole of the contact surface of either or both of the first and second jaw may be smooth so as to provide an uninterrupted contact which avoids unsightly indentations on the surface of the structural element.
- the contact surfaces of the first and second jaw are offset and the clamping effect may be improved by angling or stepping one or more of the teeth to accommodate the offset.
- Suitable elongate fasteners are generally threaded fasteners (eg bolts) which are fastened with one or more (eg two) nuts.
- the first and second apertures may be any suitable shape such as round, square, pyramidal, ellipsoidal, rectangular and may be slotted. In the embodiment where the first and second jaw are asymmetrically nested, the first and second apertures are ellipsoidal to accommodate the asymmetry.
- the clamp of the invention will be made from mild steel which is optionally electro-zinc plated. More generally, the choice of material and dimensions appropriate for the purpose will be readily apparent to the skilled man.
- the first and second jaws of the clamp of the invention may be opened manually to an extent sufficient to capture between the opposing contact surfaces the lower and upper surfaces of a structural element (eg a beam).
- a structural element eg a beam
- leading edges of the contact surfaces may be used as a camming surface to force open the first and second jaws by pressing the mouth of the clamp against the leading edge of the structural element.
- the clamp may be steadied by bringing the leading edge of the structural element into contact with the extended inner edges of the first and second jaw. From this position, the first and second jaws are closed so that the opposing contact surfaces contact the lower surface and upper surfaces of the structural element.
- the clamp may be secured using the fastener passing through the aperture(s).
- Figures 2a-c illustrates a first embodiment of the clamp of the invention at positions of (a) minimum separation of the jaws (side and end views) and (b) maximum separation of the jaws (side and end views) and in (c) top view and Figure 2d illustrates an end view of the second jaw in isolation along section AA;
- Figures 3a-c illustrates a second embodiment of the clamp of the invention at positions of (a) minimum separation of the jaws (side and end views) and (b) maximum separation of the jaws (side and end views) and in (c) top view and Figure 3d illustrates an end view of the second jaw in isolation along section A A;
- Figures 4a and 4b illustrate a third embodiment of the clamp of the invention at positions of minimum separation of the jaws (side and end views) and maximum separation of the jaws (side view);
- Figure 5a illustrates one of the two identical jaws of a fourth embodiment of the clamp of the invention illustrated in Figure 5b at a position of minimum separation of the jaws (side view).
- a first embodiment of the clamp of the invention is illustrated in Figures 2a (closed - end and side view), 2b (open - end and side view) and 2c (top view) and is designated generally by reference numeral 1.
- the clamp 1 comprises a first jaw 2 in the form of a U-shaped body symmetrically nested partially within a second jaw 3 in the form of a U-shaped body.
- the U-shaped body of the first jaw 2 has a base 4 between opposed side walls 5a and 5b.
- the U- shaped body of the second jaw 3 has a base 7 between opposed side walls 6a and 6b and is generally of a larger overall dimension than the first jaw 2.
- the trailing edge 10 of the second jaw 3 and the trailing edge of the first jaw 2 bound an open rear end 30.
- the leading edge 11, 12 of the first and second jaw 2,3 respectively together define a mouth 13.
- the upper part of the leading edge 12 of the second jaw 3 is cut away into a nose portion.
- the lower part of the leading edge of the first jaw 2 is chamfered into a chin 17.
- the first and second jaws 2,3 have opposing contact surfaces 8 and 9 respectively which in use contact lower and upper surfaces of a structural element such as a beam.
- the opposing contact surfaces 8 and 9 are relatively substantially linearly displaceable (ie in direction X) between a position of minimum separation (see Figure 2a) and a position of maximum separation (see Figure 2b).
- the opposing contact surfaces 8 and 9 are provided with a plurality of n-shaped teeth which serve to grip the lower and upper surface of the structural element.
- An extended inner edge 14 and 15 of each of the opposing contact surfaces 8 and 9 respectively extend substantially parallel to the direction of linear displacement (X).
- An outer edge 18 and 19 of each of the opposing contact surfaces 8 and 9 respectively are radiussed.
- three guiding means In order to guide the opposing contact surfaces 8 and 9 during relative substantially linear displacement (and to prevent rocking), there are provided three guiding means:
- Tabs 20 and 21 inwardly dependent from the sides 6a and 6b of the second jaw 3 (seen most clearly in the isolated view of the second jaw 3 in Figure 2d) slidably engage elongate apertures (only one of which is shown 22) in the first jaw 2 extending parallel to the direction of linear displacement X.
- the length 1 of the elongate aperture 22 delimits the linear displacement to the maximum separation illustrated in Figure 2b;
- the first and second jaws 2,3 may be opened manually to an extent sufficient to capture between the opposing contact surfaces the lower and upper surfaces of a structural element (eg to the position shown in Figure 2a).
- the radiussed outer edges 18 and 19 may be used as a camming surface to force open the first and second jaws 2, 3 by pressing the mouth 13 against the leading edge of the structural element.
- the clamp 1 may be steadied by bringing the leading edge of the structural element into contact with the extended inner edges 14, 15 of the first jaw 2 and second jaw 3. From this position, the first and second jaws 2,3 are closed so that the opposing contact surfaces contact the lower surface and upper surfaces of the structural element.
- the relative linear movement of the first and second jaws 2,3 is guided by the guiding means described above which also serve to resist relative non-linear displacement (eg rocking).
- the second jaw 3 is provided with an aperture 27 collinear with an aperture in the first jaw 2 (not shown). Each aperture is capable of receiving a suspension element (not shown) such as a drop rod which may be fastened to the first jaw 2 using a nut 28 and to the second jaw 3 using a nut 29 in order to secure the clamp 1 to the structural element.
- a suspension element such as a drop rod which may be fastened to the first jaw 2 using a nut 28 and to the second jaw 3 using a nut 29 in order to secure the clamp 1 to the structural element.
- a second embodiment of the clamp of the invention is illustrated in Figures 3a (closed - end and side view), 3b (open - end and side view) and 3c (top view) and is designated generally by reference numeral 31.
- the clamp 31 comprises a first jaw 32 in the form of a U-shaped body symmetrically nested partially within a second jaw 33 in the form of a U-shaped body.
- the U-shaped body of the first jaw 32 has a base 34 between opposed side walls 35a and 35b.
- the U-shaped body of the second jaw 33 has a base 37 between opposed side walls 36a and 36b and is generally of a larger overall dimension than the first jaw 32.
- the trailing edge 310 of the second jaw 33 and the trailing edge of the first jaw 32 bound an open rear end 330.
- the leading edge 311, 312 of the first and second jaw 32,33 respectively together define a mouth 313.
- the upper part of the leading edge 312 of the second jaw 33 is cut away into a nose portion.
- the lower part of the leading edge of the first jaw 32 is chamfered into a chin 317.
- the first and second jaws 32,33 have opposing contact surfaces 38 and 39 respectively which in use contact lower and upper surfaces of a structural element such as a beam.
- the opposing contact surfaces 38 and 39 are relatively substantially linearly displaceable (ie in direction X) between a position of minimum separation (see Figure 3a) and a position of maximum separation (see Figure 3b).
- the opposing contact surfaces 38 and 39 are provided with a plurality of n-shaped teeth which serve to grip the lower and upper surface of the structural element.
- An extended inner edge 314 and 315 of each of the opposing contact surfaces 38 and 39 respectively extend substantially parallel to the direction of linear displacement (X).
- An outer edge 318 and 319 of each of the opposing contact surfaces 38 and 39 respectively are radiussed.
- three guiding means In order to guide the opposing contact surfaces 38 and 39 during relative substantially linear displacement (and to prevent rocking), there are provided three guiding means: (1) Tabs 320 and 321 inwardly dependent from the sides 36a and 36b of the second jaw 33 (seen most clearly in the isolated view of the second jaw 33 in Figure 3d) slidably engage elongate apertures (only one of which is shown 322) in the first jaw 32 extending parallel to the direction of linear displacement X. The length 1 of the elongate aperture 322 delimits the linear displacement to the maximum separation illustrated in Figure 3b;
- the first and second jaws 32,33 may be opened manually to an extent sufficient to capture between the opposing contact surfaces the lower and upper surfaces of a structural element (eg to the position shown in Figure 3a).
- the radiussed outer edges 318 and 319 may be used as a camming surface to force open the first and second jaws 32, 33 by pressing the mouth 313 against the leading edge of the structural element.
- the clamp 31 may be steadied by bringing the leading edge of the structural element into contact with the extended inner edges 314, 315 of the first jaw 32 and second jaw 33. From this position, the first and second jaws 32,33 are closed so that the opposing contact surfaces contact the lower surface and upper surfaces of the structural element.
- the relative linear movement of the first and second jaws 32,33 is guided by the guiding means described above which also serve to resist relative non-linear displacement (eg rocking).
- the second jaw 33 is provided with an aperture 327 collinear with an aperture in the first jaw 32 (not shown). Each aperture is capable of receiving a suspension element (not shown) such as a drop rod which may be fastened to the first jaw 32 using a nut 328 and to the second jaw 33 using a nut 329 in order to secure the clamp 31 to the structural element.
- a suspension element such as a drop rod which may be fastened to the first jaw 32 using a nut 328 and to the second jaw 33 using a nut 329 in order to secure the clamp 31 to the structural element.
- a third embodiment of the clamp of the invention is illustrated in Figures 4a (closed - end and side view) and 4b (open - side view) and is designated generally by reference numeral 41.
- the clamp 41 comprises a first jaw 42 in the form of a U-shaped body symmetrically nested partially within a second jaw 43 in the form of a U-shaped body.
- the U-shaped body of the first jaw 42 has a base 44 between opposed side walls 45a and 45b.
- the U-shaped body of the second jaw 43 has a base 47 between opposed side walls 46a and 46b and is generally of a larger overall dimension than the first jaw 42.
- the trailing edge 410 of the second jaw 43 and the trailing edge of the first jaw 42 bound an open rear end 430.
- the leading edge 411, 412 of the first and second jaw 42,43 respectively together define a mouth 413.
- the upper part of the leading edge 412 of the second jaw 43 is cut away into a nose portion.
- the lower part of the leading edge 41 1 of the first jaw 42 is chamfered into a chin 417.
- the first and second jaws 42,43 have opposing contact surfaces 48 and 49 respectively which in use contact lower and upper surfaces of a structural element such as a beam.
- the opposing contact surfaces 48 and 49 are relatively substantially linearly displaceable (ie in direction X) between a position of minimum separation (see Figure 4a) and a position of maximum separation (see Figure 4b).
- the opposing contact surfaces 48 and 49 are provided with a plurality of n-shaped teeth which serve to grip the lower and upper surface of the structural element.
- An extended inner edge 414 and 415 of each of the opposing contact surfaces 48 and 49 respectively extend substantially parallel to the direction of linear displacement (X).
- An outer edge 418 and 419 of each of the opposing contact surfaces 48 and 49 respectively are radiussed.
- a rivet 470 extends laterally between the sides 46a and 46b of the second jaw 43 and is fixed exteriorly thereto.
- the rivet 470 passes through collinear elongate apertures (only one of which is shown as 471) in the sides 45a and 45b of the first jaw 42;
- the first and second jaws 42,43 may be opened manually to an extent sufficient to capture between the opposing contact surfaces the lower and upper surfaces of a structural element (eg to the position shown in Figure 4a).
- the radiussed outer edges 418 and 419 may be used as a camming surface to force open the first and second jaws 42, 43 by pressing the mouth 413 against the leading edge of the structural element.
- the clamp 41 may be steadied by bringing the leading edge of the structural element into contact with the extended inner edges 414, 415 of the first jaw 42 and second jaw 43. From this position, the first and second jaws 42,43 are closed so that the opposing contact surfaces contact the lower surface and upper surfaces of the structural element.
- the relative linear movement of the first and second jaws 42,43 is guided by the guiding means described above which also serve to resist relative non-linear displacement (eg rocking) in a most effective manner.
- the clamp 41 is biassed towards the closed position ( Figure 4a) by a spring 490 attached at one end to the rivet 470 and at the other to the base 44 of the first jaw 42. This assists snap fit assembly.
- the clamp 41 may be provided with apertures, fasteners and nuts as described previously.
- a fourth embodiment of the clamp of the invention is illustrated in Figure 5b (closed - end view) and is designated generally by reference numeral 51.
- the clamp 51 comprises a first jaw 52 illustrated in isolation in Figure 5a in the form of a U-shaped body asymmetrically nested partially within a second jaw 53 which is identical in profile to the first jaw 52.
- the U-shaped body of the first jaw 52 has a base 54 between opposed side walls 55a and 55b containing an ellipsoidal aperture (not shown but collinear with the ellipsoidal aperture in the second jaw 53).
- Each aperture is capable of receiving a suspension element (not shown) such as a drop rod which may be fastened to the first jaw 52 using a nut and to the second jaw 53 using a nut in order to secure the clamp 1 to the structural element.
- a suspension element such as a drop rod which may be fastened to the first jaw 52 using a nut and to the second jaw 53 using a nut in order to secure the clamp 1 to the structural element.
- the trailing edge 510 of the first jaw 52 and the trailing edge of the second jaw 53 bound an open rear end 530.
- the leading edge 511 of the first jaw 52 and of the second jaw 53 together define a mouth.
- the lower part of the leading edge 51 1 of the first jaw 52 is chamfered into a chin 517.
- the first and second jaws 52, 53 have opposing contact surfaces 58 which in use contact lower and upper surfaces of a structural element such as a beam.
- the opposing contact surfaces 58 are relatively substantially linearly displaceable (ie in direction X) between a position of minimum separation (see Figure 5b) and a position of maximum separation.
- the opposing contact surfaces 58 are provided with a plurality of n-shaped teeth which serve to grip the lower and upper surface of the structural element.
- An extended inner edge 514 of each of the opposing contact surfaces 58 extends substantially parallel to the direction of linear displacement (X).
- the edge between the trailing edge 510 and the extended inner edge 514 extends inwardly into a flange 540 which is radiussed 540a.
- An outer edge 518 of each of the opposing contact surfaces 58 is radiussed.
- a guiding means In order to guide the opposing contact surfaces 58 during relative substantially linear displacement (and to prevent rocking), there is provided a guiding means: (1) T-shaped tab 520 inwardly dependent from an edge 56a of the first jaw 52 between the trailing edge 510 and the extended inner edge 514 slidably engages an elongate slot 522 in the second jaw 53 extending parallel to the direction of linear displacement X.
- the opposing T-shaped tabs 520 and elongate slots 522 of the first jaw 52 and second jaw 53 respectively are hooked together and aligned to lock the T-shaped tabs 520 within the elongate slots 522.
- the length of the elongate slot 522 delimits the linear displacement to the maximum separation.
- the first and second jaws 52, 53 may be opened manually to an extent sufficient to capture between the opposing contact surfaces 58 the lower and upper surfaces of a structural element.
- the radiussed outer edges 518 may be used as a camming surface to force open the first and second jaws 52, 53 by pressing the mouth 513 against the leading edge of the structural element.
- the clamp 51 may be steadied by bringing the leading edge of the structural element into contact with the extended inner edges 514 of the first jaw 52 and second jaw 53. From this position, the first and second jaws 52, 53 are closed so that the opposing contact surfaces 58 contact the lower surface and upper surfaces of the structural element.
- the relative linear movement of the first and second jaws 52, 53 is guided by the guiding means described above which also serve to resist relative non-linear displacement (eg rocking).
- This effect is enhanced by the fact that rocking causes the T-shaped tabs 520 and the flanges 540 (which are carefully positioned) to impinge on the suspension element or fastener so as to withstand the turning moment.
- the anti-rotation effect of the T-shaped tabs 520 and the flanges 540 increases as the jaws 52, 53 move apart linearly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Clamps And Clips (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10393804T DE10393804T5 (en) | 2002-11-29 | 2003-11-28 | clamp |
CA002536351A CA2536351A1 (en) | 2002-11-29 | 2003-11-28 | Clamp |
US10/578,705 US20070014628A1 (en) | 2002-11-29 | 2003-11-28 | Clamp |
AU2003285549A AU2003285549A1 (en) | 2002-11-29 | 2003-11-28 | Clamp |
GB0510064A GB2410527B (en) | 2002-11-29 | 2003-11-28 | Clamp |
HK06101444A HK1081629A1 (en) | 2002-11-29 | 2006-02-02 | Clamp |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0227816A GB0227816D0 (en) | 2002-11-29 | 2002-11-29 | Clamp |
GB0227816.6 | 2002-11-29 | ||
GB0312125.8 | 2003-05-28 | ||
GB0312125A GB0312125D0 (en) | 2002-11-29 | 2003-05-28 | Clamp |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004051095A1 true WO2004051095A1 (en) | 2004-06-17 |
Family
ID=32472140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2003/005184 WO2004051095A1 (en) | 2002-11-29 | 2003-11-28 | Clamp |
Country Status (8)
Country | Link |
---|---|
US (1) | US20070014628A1 (en) |
AU (1) | AU2003285549A1 (en) |
CA (1) | CA2536351A1 (en) |
DE (1) | DE10393804T5 (en) |
GB (1) | GB2410527B (en) |
HK (1) | HK1081629A1 (en) |
PL (1) | PL376834A1 (en) |
WO (1) | WO2004051095A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011161659A1 (en) * | 2010-06-25 | 2011-12-29 | Elesa S.P.A. | Panel support clamp |
EP3483459A1 (en) | 2017-11-13 | 2019-05-15 | Sikla Holding GmbH | Girder clamp |
CN114439821A (en) * | 2021-02-09 | 2022-05-06 | 黄政辉 | Clamp for building support system |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2469340A (en) * | 2009-04-09 | 2010-10-13 | Graviner Ltd Kidde | Combined passive and active vehicle fire prevention system |
US20180340638A1 (en) * | 2017-05-25 | 2018-11-29 | Edwards Vacuum Llc | Clamps for fluid conduits |
US11034000B2 (en) * | 2017-10-27 | 2021-06-15 | John C. Molburg | Frame block clamp |
USD975530S1 (en) | 2019-01-09 | 2023-01-17 | Erico International Corporation | Adjustable rod clamp |
USD1005095S1 (en) * | 2019-04-03 | 2023-11-21 | Autex Industries Limited | Desk clamp bracket |
USD955210S1 (en) * | 2019-07-11 | 2022-06-21 | Hong Chen | Clamp |
USD944070S1 (en) | 2020-02-26 | 2022-02-22 | Edwards Vacuum Llc | Clamp |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3024511A (en) * | 1959-05-26 | 1962-03-13 | Schlueter Ernest | Quick acting clamp |
US6032939A (en) * | 1999-07-19 | 2000-03-07 | Chen; Jenn-Tzong | Clamp device |
CH692711A5 (en) * | 1997-10-17 | 2002-09-30 | Sauter Ag | Heating, ventilation or air conditioning rotary nave has device for fixture of shaft body and has displacement device with first and second threads |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US734275A (en) * | 1902-10-20 | 1903-07-21 | Wallace C Lyon | Sectional connecting-clip. |
US2920369A (en) * | 1957-08-22 | 1960-01-12 | Zezula Mary | Handbag suspension clamp |
US3029055A (en) * | 1960-01-15 | 1962-04-10 | Willard B Smith | Hanger block clamps for castable roof structures |
US3053494A (en) * | 1960-04-15 | 1962-09-11 | Daniel Woodhead Company | Hanger |
US3368782A (en) * | 1965-10-22 | 1968-02-13 | Henry E. Welch | Support for linear members |
US3469810A (en) * | 1968-01-31 | 1969-09-30 | Joseph E Dorris | Beam clamp |
US3465995A (en) * | 1968-02-23 | 1969-09-09 | Viber Co | I-beam clamp |
US4826113A (en) * | 1984-11-23 | 1989-05-02 | The Dow Chemical Company | Pipe support assembly |
HU200088B (en) * | 1988-03-25 | 1990-04-28 | Rubik Erno | Gripping device particularly pincers |
ATE223009T1 (en) * | 1996-04-09 | 2002-09-15 | Erico Int Corp | UNIVERSAL HANGING DEVICE FOR A SUPPORT |
US7048735B2 (en) * | 2002-02-04 | 2006-05-23 | Smith & Nephew | External fixation system |
-
2003
- 2003-11-28 CA CA002536351A patent/CA2536351A1/en not_active Abandoned
- 2003-11-28 AU AU2003285549A patent/AU2003285549A1/en not_active Abandoned
- 2003-11-28 US US10/578,705 patent/US20070014628A1/en not_active Abandoned
- 2003-11-28 GB GB0510064A patent/GB2410527B/en not_active Expired - Lifetime
- 2003-11-28 WO PCT/GB2003/005184 patent/WO2004051095A1/en not_active Application Discontinuation
- 2003-11-28 DE DE10393804T patent/DE10393804T5/en not_active Withdrawn
- 2003-11-28 PL PL376834A patent/PL376834A1/en unknown
-
2006
- 2006-02-02 HK HK06101444A patent/HK1081629A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3024511A (en) * | 1959-05-26 | 1962-03-13 | Schlueter Ernest | Quick acting clamp |
CH692711A5 (en) * | 1997-10-17 | 2002-09-30 | Sauter Ag | Heating, ventilation or air conditioning rotary nave has device for fixture of shaft body and has displacement device with first and second threads |
US6032939A (en) * | 1999-07-19 | 2000-03-07 | Chen; Jenn-Tzong | Clamp device |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011161659A1 (en) * | 2010-06-25 | 2011-12-29 | Elesa S.P.A. | Panel support clamp |
CN102959253A (en) * | 2010-06-25 | 2013-03-06 | 埃莱萨公司 | Panel support clamp |
US9352452B2 (en) | 2010-06-25 | 2016-05-31 | Elesa S.P.A. | Panel support clamp |
EP3483459A1 (en) | 2017-11-13 | 2019-05-15 | Sikla Holding GmbH | Girder clamp |
DE102017126656A1 (en) | 2017-11-13 | 2019-05-16 | Sikla Holding Gmbh | Beam clamp |
CN114439821A (en) * | 2021-02-09 | 2022-05-06 | 黄政辉 | Clamp for building support system |
CN114439821B (en) * | 2021-02-09 | 2024-02-13 | 黄政辉 | Clamp for building support system |
Also Published As
Publication number | Publication date |
---|---|
PL376834A1 (en) | 2006-01-09 |
HK1081629A1 (en) | 2006-05-19 |
DE10393804T5 (en) | 2005-10-27 |
AU2003285549A1 (en) | 2004-06-23 |
GB0510064D0 (en) | 2005-06-22 |
GB2410527A (en) | 2005-08-03 |
CA2536351A1 (en) | 2004-06-17 |
GB2410527B (en) | 2006-04-19 |
US20070014628A1 (en) | 2007-01-18 |
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