US2923334A - Straight beam clamp with an adjustable self-locking jaw - Google Patents

Straight beam clamp with an adjustable self-locking jaw Download PDF

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Publication number
US2923334A
US2923334A US742642A US74264258A US2923334A US 2923334 A US2923334 A US 2923334A US 742642 A US742642 A US 742642A US 74264258 A US74264258 A US 74264258A US 2923334 A US2923334 A US 2923334A
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jaw
bar
clamp
work
locking jaw
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US742642A
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Jr Charles M Brennan
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    • 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
    • B25B5/00—Clamps
    • B25B5/16—Details, e.g. jaws, jaw attachments
    • B25B5/166—Slideways; Guiding and/or blocking means for jaws thereon

Definitions

  • This invention relates to clamps, and relates more particularly to a clamp of the type which may be employed to clamp together a plurality of pieces of Wood, for example, after glue has been applied to them, to hold them together until the glue has set.
  • One object of the invention is to provide an improved clamp of the type characterized above. Another object is to provide in a clamp such as characterized above, an improved adjustable jaw of the self-locking type. Further objects of the invention will be apparent from the following detailed description of the clamp shown in the accompanying drawing.
  • Fig. 1 is a fragmentary elevational view illustrating a clamp embodying the invention and showing the jaws of the clamp in position to clamp together a number of pieces of wood;
  • Fig. 2 is a fragmentary top plan view-of the clamp
  • Fig. 3 is an enlarged sectional view taken on line 3-3 of Fig. 2 and further illustrating the self-locking jaw of the clamp in the locked position thereof;
  • Fig. 4 is a similar view but illustrates another position of the jaw.
  • Fig. 5 is a sectional view taken on line 5-5 of Fig. 1.
  • the clamping bar or rod of the clamp is indicated at and may be formed of a section of iron pipe having a threaded end 11.
  • the threaded part of the bar is received in an internally threaded sleeve member 12 to be held fast by the latter.
  • the member 12 has an integral laterally projecting extension 13 having a threaded bore therethrough to serve as a fixed nut and receive a screw 14 arranged lengthwise of the bar 10 to impart movement to a jaw 17 slidable on the bar, the bar and the screw being spaced apart in the manner shown in Fig. 1.
  • the outer end of the screw 14 beyond the member 12 is provided with a manually operable operating member 15 secured thereto as by a pin 16.
  • the operating member 15 is elongated transversely of the screw 14 and is secured to the latter intermediate the ends of the member 15.
  • the thumb of the users right hand may press against the blade-like portion 18 of the member may be held in the palm of the same hand.
  • the other jaw of the clamp is indicated at 22 and this jaw is of substantially the same vertical dimension as the jaw 17 and is provided with a flat work-pressing face 23, which, in the position of the jaw shown in Fig. 1, is in 15 while the knob 19 of the member 15 2,923,334 Patented Feb. 2, 1960 tubular part 25.
  • the internal diameter of the tubular part 25 is, throughout the greater part of its length, considerably in excess of the outer diameter of the bar 10, but adjacent the inner end thereof is provided with any annular restriction of'knife-like form, which,
  • the knife-like restriction, indicated at 27, is inclined with respect to the flat face 23 of the jaw. It has been found that an inclination of the biting edge 27 of approximately 15 from the vertical is critical for the achievement of best results.
  • the jaw 22 is formed of a metal of great hardness to facilitate the biting or binding of the knife-like edge 27 with the bar when the jaw 22 is in the clamping position shown in Fig. 3.
  • the jaw 22 may be tipped to the position of Fig. 4 and moved freely along the bar 10 so that it may be properly positioned in accordance with the width of the particular work which it is desired to clamp.
  • the internal diameter of the annular knife edge 27 is only slightly in excess of the external diameter of the bar 10.
  • the knife-like edge 27 is formed in part by a gently tapered portion 28 of the jaw 22. Below the part 10 the jaw is sharply tapered, as at 28 and even more sharply tapered, as at 29.
  • the inner portion of the tubular part 25 of the jaw is very sharply tapered above the bar, as at 30.
  • the abovementioned tapers provide the knife-like edge 27 which is quite sharp, especially at the lower part thereof. It will be noted that the upper part of the edge 27 is provided with its more sharply tapered portion, the portion 30, facing away from the work. This facilitates greater binding of the edge 27 to resist movement of the jaw away from the work when the jaw is in the workclamping position.
  • the operation of the clamp will be manifest.
  • the movable jaw 22 is tipped to the extent indicated in Fig. 4 and moved along the bar to the desired position so that the work may be interposed between the two jaws of the clamp.
  • the manually operated member 15 is rotated to effect movement of the screw in a direction to press the jaw 17 against the work and to press the work against the jaw 22.
  • Pressure of the work on the jaw 22 effects movement of the latter from the tipped position of Fig. 4 to the upright position of Fig. 3.
  • the jaw 22 is in the upright position shown in the last-mentioned view, it binds very strongly against the bar and thereby resists outward movement along the bar.
  • the operating member 15 is rotated in the other direction and this backs off the jaw 17 so that the work may be easily slipped out of the clamp.
  • an improved clamp which is constructed of few and rugged parts and is economical to produce while being very efiicient and reliable in operation.
  • a clamp having a self-locking jaw of im proved construction.
  • A: clamp comprising a cylindrical supporting. bar, means fixed to one end of the bar for supportinga handle. equipped screw, a handle-equipped screw threaded] through said means in parallel relation to the barrier. lengthwise movement of the screw, a first or. self locki'ng" eter considerably larger than the diameter of the bar,v the first jaw having at the inner end of the cylindrical part a flange extending above and below the bar. and providing,
  • the first jaw also having an annular knife-like restriction adjacent the inner end of the cylindrical part and. inclined downwardl-,. ly and inwardly at an angle offapproximatel'y 15 to a; plane, normal to the bar when the jaw is in clamping.
  • said knife-like restriction being deeper overth bar than under it and tending to bite into said bar and resist dislocation in a direction away from the work when the work is pressed against the first jaw, the portion of the knife-like restriction which lies below the bar being formed by sharply tapered inner and outer surfaces, and the portion of the knife-like restriction which lies above the bar being formed by a gently tapered inner surface and a sharply-tapered outer surface, the firstjaw when not pressed by the work being tiltable inwardly on the bar to a limited extent and being adjustable along the bar when in tilted position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Description

Feb. 2, 1960 c. M. BRENNAN, JR 2,923,334
STRAIGHT BEAM CLAMP WITH AN ADJUSTABLE SELF-LOCKING JAW Filed June 17, 1958 INVENT OR Charles M. Brennan JK United States atent STRAIGHT BEAM CLAlVIP WITH AN ADJUSTABLE SELF-LOCKING JAW Charles M. Brennan, Jr., New Haven, Conn. Application June 17, 1958, Serial No. 742,642 1 Claim. (Cl. 144-303) This invention relates to clamps, and relates more particularly to a clamp of the type which may be employed to clamp together a plurality of pieces of Wood, for example, after glue has been applied to them, to hold them together until the glue has set.
One object of the invention is to provide an improved clamp of the type characterized above. Another object is to provide in a clamp such as characterized above, an improved adjustable jaw of the self-locking type. Further objects of the invention will be apparent from the following detailed description of the clamp shown in the accompanying drawing.
In the drawing:
Fig. 1 is a fragmentary elevational view illustrating a clamp embodying the invention and showing the jaws of the clamp in position to clamp together a number of pieces of wood;
Fig. 2 is a fragmentary top plan view-of the clamp;
Fig. 3 is an enlarged sectional view taken on line 3-3 of Fig. 2 and further illustrating the self-locking jaw of the clamp in the locked position thereof;
Fig. 4 is a similar view but illustrates another position of the jaw; and
Fig. 5 is a sectional view taken on line 5-5 of Fig. 1.
In the drawing, the clamping bar or rod of the clamp, is indicated at and may be formed of a section of iron pipe having a threaded end 11. The threaded part of the bar is received in an internally threaded sleeve member 12 to be held fast by the latter. The member 12 has an integral laterally projecting extension 13 having a threaded bore therethrough to serve as a fixed nut and receive a screw 14 arranged lengthwise of the bar 10 to impart movement to a jaw 17 slidable on the bar, the bar and the screw being spaced apart in the manner shown in Fig. 1. The outer end of the screw 14 beyond the member 12 is provided with a manually operable operating member 15 secured thereto as by a pin 16. The operating member 15 is elongated transversely of the screw 14 and is secured to the latter intermediate the ends of the member 15. When the operating member is rotated by the user to effect movement of the jaw 17 along the bar 10, the thumb of the users right hand, for example, may press against the blade-like portion 18 of the member may be held in the palm of the same hand.
As shown in Fig. 1, the movable jaw 17, which is bolted, as at 20, to the end of the screw remote from the operating member 15, is of a height approximating the member 12 and its vertical extension 13 and has a flat work-pressing face, as at 21. The jaw 17, which is of the form shown in Figs. 1 and 2, is provided with a suitable opening through which the bar 10 is extended, the arrangement being such that the jaw 17 is supported by the bar for movement along the latter.
The other jaw of the clamp is indicated at 22 and this jaw is of substantially the same vertical dimension as the jaw 17 and is provided with a flat work-pressing face 23, which, in the position of the jaw shown in Fig. 1, is in 15 while the knob 19 of the member 15 2,923,334 Patented Feb. 2, 1960 tubular part 25.
As shown in'Figs. 3 and 4, the internal diameter of the tubular part 25 is, throughout the greater part of its length, considerably in excess of the outer diameter of the bar 10, but adjacent the inner end thereof is provided with any annular restriction of'knife-like form, which,
when the jaw 22 is in the position of Fig. 3, tends to bite into the bar to prevent dislocation of the jaw in a direction away from the jaw 17. The knife-like restriction, indicated at 27, is inclined with respect to the flat face 23 of the jaw. It has been found that an inclination of the biting edge 27 of approximately 15 from the vertical is critical for the achievement of best results. The jaw 22 is formed of a metal of great hardness to facilitate the biting or binding of the knife-like edge 27 with the bar when the jaw 22 is in the clamping position shown in Fig. 3.
However, when there is no work pressing the jaw 22, the jaw 22 may be tipped to the position of Fig. 4 and moved freely along the bar 10 so that it may be properly positioned in accordance with the width of the particular work which it is desired to clamp. It may be noted that the internal diameter of the annular knife edge 27 is only slightly in excess of the external diameter of the bar 10. In connection with the form of the knife-like edge 27 it may be noted that above the bar the knife-like edge 27 is formed in part by a gently tapered portion 28 of the jaw 22. Below the part 10 the jaw is sharply tapered, as at 28 and even more sharply tapered, as at 29. The inner portion of the tubular part 25 of the jaw is very sharply tapered above the bar, as at 30. The abovementioned tapers provide the knife-like edge 27 which is quite sharp, especially at the lower part thereof. It will be noted that the upper part of the edge 27 is provided with its more sharply tapered portion, the portion 30, facing away from the work. This facilitates greater binding of the edge 27 to resist movement of the jaw away from the work when the jaw is in the workclamping position.
In view of the foregoing disclosure, it is believed that the operation of the clamp will be manifest. To clamp two or more pieces of Wood together, the movable jaw 22 is tipped to the extent indicated in Fig. 4 and moved along the bar to the desired position so that the work may be interposed between the two jaws of the clamp. Then the manually operated member 15 is rotated to effect movement of the screw in a direction to press the jaw 17 against the work and to press the work against the jaw 22. Pressure of the work on the jaw 22 effects movement of the latter from the tipped position of Fig. 4 to the upright position of Fig. 3. When the jaw 22 is in the upright position shown in the last-mentioned view, it binds very strongly against the bar and thereby resists outward movement along the bar. To release the work from the clamp the operating member 15 is rotated in the other direction and this backs off the jaw 17 so that the work may be easily slipped out of the clamp.
In accordance with the foregoing disclosure, there is illustrated an improved clamp which is constructed of few and rugged parts and is economical to produce while being very efiicient and reliable in operation. There is also provided a clamp having a self-locking jaw of im proved construction.
While only one form of the clamp has been illustrated in the drawing and described above, it will be apparent to those versed in the art that the clamp is susceptible of various changes and modifications in details without departure from the principles of the invention and the scope of the appended claim.
What I claim is:
A: clamp comprising a cylindrical supporting. bar, means fixed to one end of the bar for supportinga handle. equipped screw, a handle-equipped screw threaded] through said means in parallel relation to the barrier. lengthwise movement of the screw, a first or. self locki'ng" eter considerably larger than the diameter of the bar,v the first jaw having at the inner end of the cylindrical part a flange extending above and below the bar. and providing,
a fiat work-engaging face which in the clamping position of the jaw is in a plane normalto the bar, the first jaw also having an annular knife-like restriction adjacent the inner end of the cylindrical part and. inclined downwardl-,. ly and inwardly at an angle offapproximatel'y 15 to a; plane, normal to the bar when the jaw is in clamping.
position, said knife-like restriction being deeper overth bar than under it and tending to bite into said bar and resist dislocation in a direction away from the work when the work is pressed against the first jaw, the portion of the knife-like restriction which lies below the bar being formed by sharply tapered inner and outer surfaces, and the portion of the knife-like restriction which lies above the bar being formed by a gently tapered inner surface and a sharply-tapered outer surface, the firstjaw when not pressed by the work being tiltable inwardly on the bar to a limited extent and being adjustable along the bar when in tilted position.
References Cited in the filev of this patent UNITED STATES PATENTS 1,371,080 Dupuy Mar. 8, 1921 1,806,527 Eisemann May 19, 1931 2,221,325 Holman- Nov; '12, 1940 2,262,429 Dicker" n Nov. 11, 1941" FOREIGN PATENTS. 17,419 Great Britain Ju1yr 26,. 19121
US742642A 1958-06-17 1958-06-17 Straight beam clamp with an adjustable self-locking jaw Expired - Lifetime US2923334A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441068A (en) * 1966-12-08 1969-04-29 Floyd W Clark Work holder and bench for fitting hardware to doors and the like
DE3105262A1 (en) * 1981-02-13 1982-09-02 Bessey & Sohn Gmbh & Co, 7000 Stuttgart TOOL FORMING, PRESSING OR PERFORMING OTHER WORKING OPERATIONS USING PRESSURE
EP0329584A1 (en) * 1988-02-18 1989-08-23 Martival S.A. Frame-clamping device
US5083482A (en) * 1989-07-05 1992-01-28 Floyd Fred D Lid wrench
US5692734A (en) * 1993-07-15 1997-12-02 American Tool Companies, Inc. Clamp structure
US5722649A (en) * 1996-09-26 1998-03-03 Morris; Milton I. Adjustable Clamp
US6367787B1 (en) 1999-03-01 2002-04-09 American Tool Companies, Inc. Hand clamp
US6412767B1 (en) 1998-03-06 2002-07-02 American Tool Companies, Inc. Clamping jaw
US6505391B1 (en) * 1990-03-08 2003-01-14 Philippe Jean Henri Berna Process for making a versatile clamping device designed to hold objects without damaging them, such a device and its use
US6554264B1 (en) * 2001-10-24 2003-04-29 Amigo Fab-Tool, Inc. Clamp/spread/jack tool mechanism
US20050082728A1 (en) * 2001-08-10 2005-04-21 Cicenas Chris W. Increased and variable force and multi-speed clamps
US20050156368A1 (en) * 2003-10-03 2005-07-21 Fuller Anthony B. Pipe clamp with releasable clamp body
US20060043662A1 (en) * 2004-08-25 2006-03-02 Trw Automotive U.S. Llc Plastic clamp and method of manufacturing the same
US20080053262A1 (en) * 2003-12-12 2008-03-06 Irwin Industrial Tool Company Clamping or Spreading Tool
US10279455B1 (en) * 2017-07-25 2019-05-07 Royce D. Cooper Pipe clamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191217419A (en) * 1912-07-26 1912-11-28 Mortimer Warren Improved Clamp for Holding Woodwork when Glued or otherwise Required to be Held in like Manner.
US1371080A (en) * 1919-03-27 1921-03-08 Robert E Dupuy Quick-acting wrench
US1806527A (en) * 1931-05-19 Clamping vise
US2221325A (en) * 1938-08-20 1940-11-12 Adjustable Clamp Co Adjustable clamping device
US2262429A (en) * 1939-10-13 1941-11-11 Auto Specialties Mfg Co Lifting jack

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1806527A (en) * 1931-05-19 Clamping vise
GB191217419A (en) * 1912-07-26 1912-11-28 Mortimer Warren Improved Clamp for Holding Woodwork when Glued or otherwise Required to be Held in like Manner.
US1371080A (en) * 1919-03-27 1921-03-08 Robert E Dupuy Quick-acting wrench
US2221325A (en) * 1938-08-20 1940-11-12 Adjustable Clamp Co Adjustable clamping device
US2262429A (en) * 1939-10-13 1941-11-11 Auto Specialties Mfg Co Lifting jack

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441068A (en) * 1966-12-08 1969-04-29 Floyd W Clark Work holder and bench for fitting hardware to doors and the like
DE3105262A1 (en) * 1981-02-13 1982-09-02 Bessey & Sohn Gmbh & Co, 7000 Stuttgart TOOL FORMING, PRESSING OR PERFORMING OTHER WORKING OPERATIONS USING PRESSURE
EP0329584A1 (en) * 1988-02-18 1989-08-23 Martival S.A. Frame-clamping device
FR2627415A1 (en) * 1988-02-18 1989-08-25 Martival Sa FRAME CLAMPING DEVICE
US4919407A (en) * 1988-02-18 1990-04-24 Martival S.A. Apparatus for gripping frames
US5083482A (en) * 1989-07-05 1992-01-28 Floyd Fred D Lid wrench
US6505391B1 (en) * 1990-03-08 2003-01-14 Philippe Jean Henri Berna Process for making a versatile clamping device designed to hold objects without damaging them, such a device and its use
US5692734A (en) * 1993-07-15 1997-12-02 American Tool Companies, Inc. Clamp structure
US5722649A (en) * 1996-09-26 1998-03-03 Morris; Milton I. Adjustable Clamp
US6412767B1 (en) 1998-03-06 2002-07-02 American Tool Companies, Inc. Clamping jaw
US6367787B1 (en) 1999-03-01 2002-04-09 American Tool Companies, Inc. Hand clamp
US7815175B2 (en) 2001-08-10 2010-10-19 Irwin Industrial Tool Company Increased and variable force and multi-speed clamps
US9522456B2 (en) 2001-08-10 2016-12-20 Irwin Industrial Tool Company Increased and variable force and multi-speed clamps
US8702076B2 (en) 2001-08-10 2014-04-22 Irwin Industrial Tool Company, Inc. Increased and variable force and multi-speed clamps
US20080106016A1 (en) * 2001-08-10 2008-05-08 Cicenas Chris W Increased and Variable Force and Multi-Speed Clamps
US8074340B2 (en) 2001-08-10 2011-12-13 Irwin Industrial Tool Company Increased and variable force and multi-speed clamps
US7699297B2 (en) 2001-08-10 2010-04-20 Irwin Industrial Tool Company Increased and variable force and multi-speed clamps
US20050082728A1 (en) * 2001-08-10 2005-04-21 Cicenas Chris W. Increased and variable force and multi-speed clamps
US20100156013A1 (en) * 2001-08-10 2010-06-24 Irwin Industrial Tool Company, Inc. Increased and variable force and multi-speed clamps
US6554264B1 (en) * 2001-10-24 2003-04-29 Amigo Fab-Tool, Inc. Clamp/spread/jack tool mechanism
US20050156368A1 (en) * 2003-10-03 2005-07-21 Fuller Anthony B. Pipe clamp with releasable clamp body
EP1668284A2 (en) * 2003-10-03 2006-06-14 Irwin Industrial Tool Company Pipe clamp with relesable clamp body
US7159859B2 (en) 2003-10-03 2007-01-09 Irwin Industrial Tool Company Pipe clamp with releasable clamp body
EP1668284A4 (en) * 2003-10-03 2009-12-30 Irwin Ind Tool Co Pipe clamp with relesable clamp body
US7735813B2 (en) 2003-12-12 2010-06-15 Irwin Industrial Tools Gmbh Clamping or spreading tool
US20100276860A1 (en) * 2003-12-12 2010-11-04 Irwin Industrial Tools Gmbh Clamping or spreading tool
US20100084798A1 (en) * 2003-12-12 2010-04-08 Irwin Industrial Tool Company Clamping and or spreading tool
US8240647B2 (en) 2003-12-12 2012-08-14 Irwin Industrial Tools Gmbh Clamping or spreading tool
US8590871B2 (en) 2003-12-12 2013-11-26 Irwin Industrial Tool Company Clamping and or spreading tool
US20080053262A1 (en) * 2003-12-12 2008-03-06 Irwin Industrial Tool Company Clamping or Spreading Tool
US9463554B2 (en) * 2004-08-25 2016-10-11 Illinois Tool Works Inc. Plastic clamp and method of manufacturing the same
US20060043662A1 (en) * 2004-08-25 2006-03-02 Trw Automotive U.S. Llc Plastic clamp and method of manufacturing the same
US10279455B1 (en) * 2017-07-25 2019-05-07 Royce D. Cooper Pipe clamp

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