US3331111A - Clamps - Google Patents

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Publication number
US3331111A
US3331111A US548260A US54826066A US3331111A US 3331111 A US3331111 A US 3331111A US 548260 A US548260 A US 548260A US 54826066 A US54826066 A US 54826066A US 3331111 A US3331111 A US 3331111A
Authority
US
United States
Prior art keywords
member
movable jaw
teeth
bar
yoke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US548260A
Inventor
Carver Leonard John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CARVER AND CO ENGINEERS Ltd
Original Assignee
CARVER AND CO ENGINEERS Ltd
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 CARVER AND CO ENGINEERS Ltd filed Critical CARVER AND CO ENGINEERS Ltd
Priority to US548260A priority Critical patent/US3331111A/en
Application granted granted Critical
Publication of US3331111A publication Critical patent/US3331111A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00Clamps
    • B25B5/06Arrangements for positively actuating jaws
    • B25B5/10Arrangements for positively actuating jaws using screws
    • B25B5/102Arrangements for positively actuating jaws using screws with at least one jaw sliding along a bar
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/44Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44291Clasp, clip, support-clamp, or required component thereof including pivoted gripping member
    • Y10T24/44342Clasp, clip, support-clamp, or required component thereof including pivoted gripping member having rigid linking arm pivotally connected to each gripping member
    • Y10T24/4435Clasp, clip, support-clamp, or required component thereof including pivoted gripping member having rigid linking arm pivotally connected to each gripping member with extended lever portion
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/44Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44291Clasp, clip, support-clamp, or required component thereof including pivoted gripping member
    • Y10T24/44376Spring or resiliently biased about pivot
    • Y10T24/44385Distinct spring
    • Y10T24/44402Distinct spring with operator for moving pivoted member
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/44Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44291Clasp, clip, support-clamp, or required component thereof including pivoted gripping member
    • Y10T24/44376Spring or resiliently biased about pivot
    • Y10T24/44385Distinct spring
    • Y10T24/44427Distinct spring with position locking-means for gripping members
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/44Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44291Clasp, clip, support-clamp, or required component thereof including pivoted gripping member
    • Y10T24/44496Clasp, clip, support-clamp, or required component thereof including pivoted gripping member with operator means for moving pivoted member
    • Y10T24/44504Threaded cylindrical rod and mating cavity

Description

Jufiy i8, 196? L. J. CARVER 3,331,111

CLAMPS Filed May 6, 1966 United States Patent 3,331,111 (ILAMPS Leonard John Carver, Walsall, England, assignor to Carver & C0. (Engineers) Limited, Walsall, England, a British company Filed May 6, 1966, Ser. No. 548,260 2 Claims. (Cl. 24-263) ABSTRACT OF THE DISCLOSURE A C-clamp of the kind wherein coarse and fine adjusting means are provided for a movable jaw member slidably mounted on a frame yoke member carrying an opposed jaw, the coarse adjusting means comprising a series of teeth with which a fulcrum part of the movable jaw member is selectively engaged during the initial setting, and the fine adjusting means comprising a pressure member adapted to displace the movable jaw member angularly from said fulcrum part.

Heretofore, in most proposed C-clamps of the kind referred to, the frame yoke member has been in the form of a bar substantially of rectangular section carrying the teeth arranged in a single row along one face thereof. This arrangement, however, wherein the teeth extend across the full width of one face of the yoke bar, is ineflicient in that it tends to produce undesirable mechanical weaknesses, especially when it is desired to fabricate the clamps from lightweight alloys, and one object of the present invention is to provide an improved arrangement of ratchet teeth in such clamps.

According to the invention, in a C-clamp of the kind referred to, the teeth of the coarse adjusting means are disposed symmetrically about the median plane of the clamp in two parallel rows along the frame yoke member, the median planes of the teeth in said two rows mutually inclined and intersecting along a line in the median plane of the clamp and lying parallel to the longitudinal axis of the said frame yoke member; and the movable jaw member carries a fulcrum part of re-entrant V-shape which is adapted to be selectively engaged with pairs of said teeth lying opposite to each other in said two rows. With a frame yoke member in the form of a straight rectangularsectioned bar, the teeth are conveniently formed along each front corner edge of said bar so as to extend partly into the side faces and partly into the front face (that is, the face presented towards the jaws), of the bar.

FIGURE 1 of the accompanying drawings is a side elevation, partly in section, of a C-clamp in accordance with the present invention.

FIGURE 2 is a vertical section on line IIII, FIG- URE 1, showing the front edge of the frame bar in elevation.

FIGURE 3 is a horizontal section through the frame bar on line III-III FIGURE 1, showing the movable jaw in plan.

FIG. 4 is a horizontal section on line IV1V, FIG- URE 1.

FIGURE 5 is a horizontal section through the yoke bar on line V-V.

FIGURE 6 is a plan of the movable jaw member when removed from the bar.

FIGURE 7 is a fragmentary perspective view of the upper portion of the frame bar showing the arrangement of the teeth along the front corner edges of the bar.

Referring to the said drawings the C-clamp therein shown comprises a one piece J-shaped frame 1 cast in high-strength aluminium alloy, the straight upright limb of the frame being in the form of a susbtantially rectangular section bar 2 which is provided with ratchet teeth 3,331,1ll Patented July 18, 1967 as hereinafter described and which constitutes a yoke part, Whilst the offset lower part of the frame forms a fixed jaw arm 3.

This fixed jaw arm 3 terminates at its outer end in an integrally-formed lower clamping pad 4 which is adapted to co-operate with an opposed upper movable jaw pad 5 pivotally mounted on an arm 6 of a movable jaw member 7 which is slidably mounted upon the yoke part of the frame.

This movable jaw member 7 consists of a one-piece aluminium alloy casting and, in effect, forms a two-armed lever of which the one arm 6 carries the upper movable jaw pad 5, and the other arm is formed by a hollow boxlike body part having spaced-apart side walls 8 which are connected by upper and lower rear wall portions 9, 10 and which embrace the frame yoke bar 2 which is passed through the hollow interior of said body part. Integral with the lower rear wall portion 10 of the hollow body part is a rearwardly-projecting .boss 11 having a screwthreaded bore in which is fitted a screw 12 adapted to bear at its inner end on the rear face of the yoke bar 2 and thereby to provide for fine adjustment of the clamp, as later described. The head of this adjusting screw is conveniently fitted with a tommy bar 13 to facilitate manual operation.

The yoke bar 2 of the frame member is provided with a series of ratchet teeth 14 separated by notches 15 and which are arranged in two separate, spaced apart parallel rows along each of the two front corner edges of the yoke bar, the median planes A-A, AA, of the teeth in the two rows (see FIGURE 5) being mutually inclined so that the teeth are set obliquely and extend partly into the side faces and partly into the front face of the yoke bar. Moreover, the said teeth are symmetrically disposed with respect to the median plane BB (FIGURE 5) of the clamp which passes through the longitudinal axis of the yoke bar 2 and which also contains the line of intersection of the median planes A-A, A- of the two rows of ratchet teeth.

The hollow body part of the movable jaw member 7 is so formed as to fit over the yoke bar 2 of the frame with considerable clearance space, and on its interior face which forms the end of the arm 6 carrying the movable jaw pad 5 it has an integral projection 16, of re-entrant V-shape in plan, which forms a fulcrum part, the mutually-inclined side portions of said projection being adapted to be engaged with selected pairs of the ratchet teeth 14 lying opposite to each other in the two rows, in order to give a coarse setting adjustment of the movable clamp arm 6. The engagement of the fulcrum part 16 with the ratchet teeth in each setting is normally maintained by a blade spring 17 which is anchored at its lower end, at 18, to the lower rear wall portion 10 of the body part of the movable jaw member, the free upper end of this spring 17 being arranged to bear upon the rear face of the yoke bar 2 above the fulcrum part 16. Provided the fine adjustment screw 12 is first slackened off, however, the resistance of this blade spring can easily be overcome to enable the fulcrum part 16 to ride over, or be moved clear of, the ratchet teeth 14 so that a quick adjustment of the coarse setting can rapidly be obtained by sliding the movable jaw member 7 along the yoke bar to a new position.

In each coarse setting, a fine adjustment of the clamp is achieved by screwing the fine adjustment screw 12 inwards against the rear face of the yoke bar 2 so that the arm 6 of the movable jaw member is caused to turn angularly about the said fulcrum part 16.

With the arrangement of the ratchet teeth as described, the stress resistance and strength of a given yoke bar can be made considerably higher than with the alternative arrangement of a single row of ratchet teeth which extend across the width of the front face of the bar, and this improvement in equivalent strength is especially advantageous when it is desired to fabricate the parts from lightweight alloy. Also, the re-entrant V-shaped form 01' configuration of the fulcrum part 16 tends to produce a strong centralising action when engaged under pressure with the ratchet teeth which assists in aligning the clamping pad 5 of the movable jaw arm with the fixed clamping pad 4 of the frame member.

I claim:

1. A C-clamp comprising a frame yoke member carrying a fixed jaw; a movable jaw member slidably mounted on said frame yoke member; two parallel rows of rack teeth on said yoke member, the same being disposed symmetrically about the median plane of the yoke member with the median planes of the teeth in the two rows mutually inclined and intersecting along a line in the median plane of the clamp; a fulcrum part on the movable jaw member of re-entrant V-shape in plane for selective engagement with opposite teeth in the two rows to give a coarse adjustment of the movable jaw member; and a pressure member adapted to displace the said movable jaw member angularly about the said fulcrum part to provide a fine adjustment.

2. A C-clamp according to claim 1, wherein the frame yoke member consists of a straight bar of substantially rectangular section having the teeth formed along each front corner edge of said bar so as to extend partly into the side faces and partly into the front face of the bar.

References Cited UNITED STATES PATENTS 153,133 7/1874 Wagoner 269-l71 248,949 11/1881 Pope 269285 957,520 5/1910 Stearns 269-285 FOREIGN PATENTS 863,441 3/1961 Great Britain.

WILLIAM FELDMAN, Primary Examiner.

DONALD A. GRIFFIN, Examiner.

Claims (1)

1. A C-CLAMP COMPRISING A FRAME YOKE MEMBER CARRYING A FIXED JAW; A MOVABLE JAW MEMBER SLIDABLY MOUNTED ON SAID FRAME YOKE MEMBER; TWO PARALLEL ROWS OF RACK TEETH ON SAID YOKE MEMBER, THE SAME BEING DISPOSED SYMMETRICALLY ABOUT THE MEDIAN PLANE OF THE YOKE MEMBER WITH THE MEDIAN PLANES OF THE TEETH IN THE TWO ROWS MUTUALLY INCLINED AND INTERSECTING ALONG A LINE IN THE MEDIAN PLANE OF THE CLAMP; A FULCRUM PART ON THE MOVABLE JAW MEMBER OF RE-ENTRANT V-SHAPE IN PLANE FOR SELECTIVE ENGAGEMENT WITH OPPOSITE TEETH IN THE TWO ROWS TO GIVE A COARSE ADJUSTMENT OF THE MOVABLE JAW MEMBER; AND A PRESSURE MEMBER ADAPTED TO DISPLACE THE SAID MOVABLE JAW MEMBER ANGULARLY ABOUT THE SAID FULCRUM PART TO PROVIDE A FINE ADJUSTMENT.
US548260A 1966-05-06 1966-05-06 Clamps Expired - Lifetime US3331111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US548260A US3331111A (en) 1966-05-06 1966-05-06 Clamps

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US548260A US3331111A (en) 1966-05-06 1966-05-06 Clamps

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US3331111A true US3331111A (en) 1967-07-18

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380730A (en) * 1965-04-15 1968-04-30 Carver & Co Eng Workpiece clamping devices
US4078781A (en) * 1976-12-07 1978-03-14 Hmc-Brauer Limited Clamps
US4541155A (en) * 1983-04-07 1985-09-17 Gagnon Paul L Portable beam clamp
US5253072A (en) * 1990-12-06 1993-10-12 Samsung Electronics Co., Ltd. Device for fixing a microphone on a video camera
US5265854A (en) * 1992-10-19 1993-11-30 Whiteford Carlton L Self-powered bar clamp
DE4229253A1 (en) * 1992-09-02 1994-03-03 Gross & Froelich Gmbh & Co Kg Cramp with auxiliary clamp - has open sided slots through guide sleeve and clamping plunger so that it can be pushed on rail from side and assembly completed by clipping on actuating screw and coupling bush
US5692734A (en) * 1993-07-15 1997-12-02 American Tool Companies, Inc. Clamp structure
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
US20040102792A1 (en) * 2002-08-09 2004-05-27 Sarin Vineet Kumar Non-imaging tracking tools and method for hip replacement surgery
US20050156368A1 (en) * 2003-10-03 2005-07-21 Fuller Anthony B. Pipe clamp with releasable clamp body
US20080053262A1 (en) * 2003-12-12 2008-03-06 Irwin Industrial Tool Company Clamping or Spreading Tool
US20080106016A1 (en) * 2001-08-10 2008-05-08 Cicenas Chris W Increased and Variable Force and Multi-Speed Clamps
US20100024176A1 (en) * 2005-04-11 2010-02-04 Sistemas Tecnicos De Encofrados, S.A Clamp for securing shuttering panels
US20120126079A1 (en) * 2010-11-23 2012-05-24 Acist Medical Systems, Inc. Bedrail clamp
US9375180B2 (en) 2012-04-29 2016-06-28 Acist Medical Systems, Inc. Universal pressure transducer mounting device
US9585806B2 (en) 2015-06-11 2017-03-07 Acist Medical Systems, Inc. Variable rate bedrail clamp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US153133A (en) * 1874-07-14 Improvement in clamps
US248949A (en) * 1881-11-01 Claip
US957520A (en) * 1909-04-16 1910-05-10 Edward C Stearns Vise.
GB863441A (en) * 1958-05-13 1961-03-22 Carver & Co Eng Improvements relating to clamps

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US153133A (en) * 1874-07-14 Improvement in clamps
US248949A (en) * 1881-11-01 Claip
US957520A (en) * 1909-04-16 1910-05-10 Edward C Stearns Vise.
GB863441A (en) * 1958-05-13 1961-03-22 Carver & Co Eng Improvements relating to clamps

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380730A (en) * 1965-04-15 1968-04-30 Carver & Co Eng Workpiece clamping devices
US4078781A (en) * 1976-12-07 1978-03-14 Hmc-Brauer Limited Clamps
US4541155A (en) * 1983-04-07 1985-09-17 Gagnon Paul L Portable beam clamp
US5253072A (en) * 1990-12-06 1993-10-12 Samsung Electronics Co., Ltd. Device for fixing a microphone on a video camera
DE4229253A1 (en) * 1992-09-02 1994-03-03 Gross & Froelich Gmbh & Co Kg Cramp with auxiliary clamp - has open sided slots through guide sleeve and clamping plunger so that it can be pushed on rail from side and assembly completed by clipping on actuating screw and coupling bush
US5265854A (en) * 1992-10-19 1993-11-30 Whiteford Carlton L Self-powered bar clamp
US5692734A (en) * 1993-07-15 1997-12-02 American Tool Companies, Inc. Clamp structure
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
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
US8074340B2 (en) 2001-08-10 2011-12-13 Irwin Industrial Tool Company Increased and variable force and multi-speed clamps
US7815175B2 (en) 2001-08-10 2010-10-19 Irwin Industrial Tool Company 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
US20100156013A1 (en) * 2001-08-10 2010-06-24 Irwin Industrial Tool Company, Inc. 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
US20040102792A1 (en) * 2002-08-09 2004-05-27 Sarin Vineet Kumar Non-imaging tracking tools and method for hip replacement surgery
US8002772B2 (en) * 2002-08-09 2011-08-23 Kinamed, Inc. Non-imaging tracking tools and method for hip replacement surgery
US7159859B2 (en) 2003-10-03 2007-01-09 Irwin Industrial Tool Company Pipe clamp with releasable clamp body
US20050156368A1 (en) * 2003-10-03 2005-07-21 Fuller Anthony B. Pipe clamp with releasable clamp body
US20100084798A1 (en) * 2003-12-12 2010-04-08 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
US20100276860A1 (en) * 2003-12-12 2010-11-04 Irwin Industrial Tools Gmbh Clamping or spreading tool
US7735813B2 (en) 2003-12-12 2010-06-15 Irwin Industrial Tools Gmbh Clamping 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
US20100024176A1 (en) * 2005-04-11 2010-02-04 Sistemas Tecnicos De Encofrados, S.A Clamp for securing shuttering panels
US7966703B2 (en) * 2005-04-11 2011-06-28 Sistemas Tecnicos De Encofrados, S.A. Clamp for securing shuttering panels
US20120126079A1 (en) * 2010-11-23 2012-05-24 Acist Medical Systems, Inc. Bedrail clamp
US9375180B2 (en) 2012-04-29 2016-06-28 Acist Medical Systems, Inc. Universal pressure transducer mounting device
US10039495B2 (en) 2012-04-29 2018-08-07 Acist Medical Systems, Inc. Universal pressure transducer mounting device
US9585806B2 (en) 2015-06-11 2017-03-07 Acist Medical Systems, Inc. Variable rate bedrail clamp

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