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US3570835A - Power operated clamping device - Google Patents

Power operated clamping device Download PDF

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Publication number
US3570835A
US3570835A US765802A US3570835DA US3570835A US 3570835 A US3570835 A US 3570835A US 765802 A US765802 A US 765802A US 3570835D A US3570835D A US 3570835DA US 3570835 A US3570835 A US 3570835A
Authority
US
United States
Prior art keywords
clamping
arm
pin
power operated
slot
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
US765802A
Other languages
English (en)
Inventor
Alexander W Mcpherson
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.)
Dover Corp
Original Assignee
Dover Corp
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 Dover Corp filed Critical Dover Corp
Application granted granted Critical
Publication of US3570835A publication Critical patent/US3570835A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25B5/08—Arrangements for positively actuating jaws using cams
    • B25B5/087—Arrangements for positively actuating jaws using cams actuated by a hydraulic or pneumatic piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/08—Work-clamping means other than mechanically-actuated
    • 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
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B25B5/064—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis perpendicular to the pressing direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q2703/00—Work clamping
    • B23Q2703/02—Work clamping means
    • B23Q2703/04—Work clamping means using fluid means or a vacuum
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide
    • Y10T74/18936—Slidable connections
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide
    • Y10T74/1896—Cam connections

Definitions

  • a power operated clamping device having a multiple mounting face base, a pivotally mounted clamping arm cam actuated to provide high pressure clamping and rapid wide angle opening, and a lost motion impact producing connection for clamp releasing actuation.
  • the present invention relates to power operated clamps and like devices, for work holding and other purposes, and in particular to a cam operated mechanism with a Wedge locking feature that has many advantages.
  • a piston cylinder member is used to actuate a roller mounted cross-pin which extends through a cam slot in an actuating extension arm that serves as a work clamping member.
  • the reciprocable stroke of the cross-pin causes cam actuation of the clamping member and provides an unusually wide jaw opening for a relatively short work stroke.
  • the cam slot is so provided as to cause the cross-pin to wedge with a locking angle in the slot near the end of its work stroke and to assure clamping pressure before the final lock-up.
  • the wedge stroke variance automatically compensates for wear by allowing an extra travel allowance.
  • a pre-load stop is provided at the extremity of the clamping stroke which enables use of different clamping arms with clamping surfaces that can be accurately machined to the mounting surfaces of the unit.
  • an initial freedom of travel provided for the actuator, before dislodging the wedged cross-pin, provides a high inertial impact that facilitates release and a rapid jaw opening.
  • FIG. 1 is a side elevation of a power operated clamp including the features of this invention and having certain parts shown in dotted and phantom outline, as will be described later.
  • FIG. 2 is an enlarged fragmentary plan view of the front end of the power operated clamp as seen in the plane of line 2-2 in the first drawing figure and looking in the direction of the arrows.
  • FIG. 3 is a front end view of the power operated clamp as seen in the plane of line 33 in FIG. 1.
  • FIG. 4 is a sectional view of the operating mechanism in the power operated clamp as seen in the plane of line 4-4 in FIG. 2.
  • FIG. 5 is similar to FIG. 4 with parts shown in a different position.
  • FIG. 6 is a cross-sectional view as seen in the plane of line 6-6 in FIG. 4.
  • FIG. 7 is a cross-sectional view as seen in the plane of the offset line 77 in FIG. 4.
  • the power operated clamping device 10 shown in the drawing figures includes a piston cylinder actuator 12 which includes a mounting head 14 and has a clamping jaw or arm member 16 pivotally attached to the mounting head as at 18.
  • An actuating extension 20, which includes a cam slot 22, is used in swinging the clamping arm to and from the solid line clamping position shown in FIG. 1 to that of the phantom line release position 16'.
  • the piston cylinder actuator 12 includes a fluid pres sure chamber member 24 with closures 26 and 28 at opposite ends and suitable connections (not shown) for fluid pressure application and release.
  • the mounting head 14 is attached to the operative end of the actuator and includes a through passage 32 for the piston rod 30 that extends from within the cylinder into the mounting head member.
  • the mounting head 14 is square in cross-section and includes mounting slots 34 across its top and bottom walls, as best seen in FIG. 1.
  • Relatively offset mounting slots 36 are also provided along its opposite sidewalls, as best seen in FIG. 2. These enable a 4-way mounting without modification of the standard mounting hole pattern and eliminates the need of angle block applications with respect to the clamping face 38 of the clamping arm member 16.
  • the outwardly extending end of the mounting head 14 is slotted, as at 40, to receive the actuating extension 20 of the clamping arm 16 therewithin, and it is also formed to include a pair of internal roller tracks 42 and 44 which extend the full length of the mounting head on each side of the slotted access for the clamping arm and back into the through passage 32 for the piston rod 30.
  • the clamping arm 16 is angular in shape with a short leg 46 pivotally connected to the mounting head, as best shown in FIG. 7, by a pivot pin 48 through a close but not tight fitting bore hole 50 near its terminal end.
  • the ends of the pivot pin extend into recesses in the sides of the mounting head, as best shown at 52 and 54, and a similar hex headed end and fastener 56 on opposite ends of the pivot pin enable the arm to be changed if and when desired.
  • clamping member 16 is shown as angular, with a depending clamping arm, it may have a different shape for disposing its clamping arm and work face in another work plane.
  • a phantom view of a clamping arm 116 is shown and identified in FIG. 1 in its work holding position, and in its retracted position as at 116'.
  • the actuating extension 20 of the clamping arm 16 (and of clamp arm .116 as well as other variations) extends into the slotted opening 40 in the mounting head.
  • the cam slot 22 in the actuating extension of the arm is angular in shape and includes a dog leg opening 58 that extends radially toward the pivotal axis of the arm, but is offset ahead of the radial line, so that it is more on a tangential line relative to the pivot pin.
  • the other leg opening 60 of the cam slot is on a tangential line on the other side of the pin and such that it is more axially aligned with the actuator cylinder, when the arm is in clamping position.
  • the cam slot opening 60 is an angular extension of the slot leg 58 and is actually formed to include about a ramp angle relative to the axial line of the actuator stroke so that the lower edge 62 of the opening serves as an inclined plane for wedge locking purposes.
  • the clamping arm 16 is operated by the piston cylinder actuator through a yoke 62 fastened to the end of the piston rod and bifurcated to provide a slot opening 64 in its end receptive of the actuating extension of the clamping arm and to support a cross pin 66 that extends through the cam slot 22, as best shown in FIGS. 6 and 7.
  • the piston rod 30 has its terminal end reduced in crosssection to provide a bearing shoulder 70 that bears against and will push the connecting part forward in its actuating stroke.
  • a pin 72 is press fitted in the smaller extended end 68, which is received within the slot opening 64 of the connecting part, at a spaced distance from the end wall of the slot, to provide shoulder means for a lost motion retracting stroke before the connecting part is engaged and drawn back to release the clamp.
  • the cross-pin 66 that is in the cam slot, is provided with rollers 74 and 76 at its opposite ends, which are received and guided in the roller tracks 42 and 44 in the mounting head, and laterally disposed ears 78 and 80 near the piston rod end of the connecting part, for like guide purposes in the guideways.
  • the power operated clamping device is used as follows:
  • the mounting head 14 provides the means for fastening the unit to a supporting structure, by use of the mounting slots 34 or 36, with the clamping arm 16 positioned for work clamping and holding purposes, as in the position shown in FIG. 1. Suitable connections (not shown) are made to the piston cylinder actuator for fiuid pressure control for advancing and retracting the piston rod 30 to perform its intended function.
  • the rapid action commences which swings the clamping arm up and into its full 120 open position limited by registration of the yoke 62 with the piston packing gland 63.
  • a sleeve spacer may be installed on the piston rod 30 between the yoke 62 and gland 63 to limit the retraction stroke if desired, as shown in FIG. 5 and in the dotted line position 16 in FIG. 1.
  • the pin bears against the back wall of the slot opening leg 58 and moves relatively down into the slot, as it is pulled straight back, and then moves up the same slot wall surface and beyond into the extended slot leg 60, as shown in FIG. 5, where it will hold the clamping arm open in the fully retracted position.
  • the bearing shoulder pushes the yoke 62 forward and advances the roller mounted cross-pin 66 causing it to move relatively down and back up the cam slot leg 58 and to locate the clamping arm in work holding position.
  • the pin moves into the extended cam slot leg 60 it bears against the slot wall surface 62 which includes an incline, when the clamping face of the arm or jaw member is in work holding position, and it increases the clamping pressure until the actuating force is balanced by the resistant force built up due to the wedging of the pin against the inclined ramp wall of the slot.
  • the final clamping position is reached at or just prior to the prestop position shown in FIG. 4 where further travel is limited by engagement of an arm stop surface with the mounting head at 47. This limit stop may be used to facilitate initial set up of the clamp arm and, if desired, to limit the clamping force applied to the work piece.
  • the 5 ramp portion 60 of the slot provides positive locking angle clamping within 3 of the final positioning of the clamping arm, and with a clamping pressure that is very high because of the gradual ramp angle.
  • An overtravel extension of the slot 60 with corresponding extra travel allowance in the cylinder also enables the unit to automatically compensate for wear.
  • a work clamping device comprising; a base having a plurality of mounting faces, a single fixed pivot on said base, a clamp arm member mounted on said pivot for rotation in a circular are about the pivot axis and having an actuating extension and an actuating cam slot provided therein, a linear power means mounted on said base, a reciprocable member disposed in said cam slot actuated by said power means, guide means in said base for said reciprocable member providing a reactive force cooperating with said cam slot for exerting clamping pressure on said arm, said cam slot including two obliquely disposed portions engageable by said reciprocable member adapted to provide said clamping pressure engagement in the clamping stroke and rapid opening engagement in the retracting stroke.
  • said power means comprises a piston cylinder actuator operatively connected to said reciprocable member, and said guide means extends parallel to the axis of said cylinder.
  • said base is fixed to the head of said piston cylinder actuator and slotted for receiving the actuating extension of said arm member in axial alignment with said actuator, said reciprocable member comprising a roller mounted cross pin, and said guide means being receptive of the roller mounted ends of said cross pin.
  • the work clamping device of claim 1 including: a lost motion connection between said power means and reciprocable member for impact actuation of the latter in the retracting stroke.
  • a power operated clamping device comprising: a piston cylinder actuator having a mounting head provided on the operative end thereof, a single fixed pivot on said head, a work holding arm member mounted on said pivot for rotation in a circular are about the pivot axis and having an actuating extension including a cam slot disposed for piston actuation, a roller mounted cross pin operatively engaged by said actuator, extending through said cam slot and guided for reciprocal travel within said mounting head, said cam slot including two obliquely disposed portions engageable by said cross pin adapted to provide clamping pressure engagement in the clamping stroke and rapid opening engagement in the retracting stroke said clamping portion of said cam slot formed with an acute angle inclination relative to the reciprocal travel of said roller mounted cross pin to provide high pressure locking engagement.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
US765802A 1968-10-08 1968-10-08 Power operated clamping device Expired - Lifetime US3570835A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76580268A 1968-10-08 1968-10-08

Publications (1)

Publication Number Publication Date
US3570835A true US3570835A (en) 1971-03-16

Family

ID=25074525

Family Applications (1)

Application Number Title Priority Date Filing Date
US765802A Expired - Lifetime US3570835A (en) 1968-10-08 1968-10-08 Power operated clamping device

Country Status (7)

Country Link
US (1) US3570835A (nl)
BE (1) BE739956A (nl)
DE (1) DE1950721A1 (nl)
FR (1) FR2020171A1 (nl)
GB (1) GB1281598A (nl)
LU (1) LU59595A1 (nl)
NL (1) NL157532B (nl)

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724837A (en) * 1970-09-02 1973-04-03 Dover Corp Retracting clamp
US4358099A (en) * 1978-05-30 1982-11-09 Matsushita Electrical Industrial Co. Ltd. Stator core holding device for fabricating a stator assembly for an electrical machine
US4458889A (en) * 1982-09-29 1984-07-10 Dover Corporation (De-Sta-Co. Div.) Locking power clamp
US4494739A (en) * 1983-03-04 1985-01-22 State Die & Engineering, Inc. Power operated rotatable clamping assembly
US4496138A (en) * 1982-03-26 1985-01-29 Blatt Leland F Power operated clamp
US4537085A (en) * 1983-01-24 1985-08-27 Valentine Al L Pivotal lift apparatus
US4570914A (en) * 1982-03-26 1986-02-18 Blatt Leland F Power operated clamp
US4593573A (en) * 1984-12-18 1986-06-10 Bond Irvin D Inversion cam and cylinder power means
US4637597A (en) * 1982-09-29 1987-01-20 De-Sta-Co Division/Dover Corporation Locking power clamp
US4858735A (en) * 1985-06-18 1989-08-22 Heddle Richard W Stationary pivot mechanism for use with a damper
US4867417A (en) * 1988-03-28 1989-09-19 Williamson Robert L Power lift-assist apparatus
US4882970A (en) * 1989-01-04 1989-11-28 The United States Of America As Represented By The Secretary Of The Navy Motion translator
US4905973A (en) * 1989-01-11 1990-03-06 Blatt John A Power operated clamp with externally mounted adjustable clamp arm
DE8913386U1 (de) * 1989-11-13 1991-03-14 De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt Spannvorrichtung
US5460358A (en) * 1993-11-29 1995-10-24 Sendoykas; Jack J. Power clamp
US5490663A (en) * 1992-08-07 1996-02-13 United Technologies Automotive, Inc. Slide actuated holding clamp
US5503378A (en) * 1992-10-30 1996-04-02 Delaware Capital Formation, Inc. Clamping chuck
US5575462A (en) * 1994-08-17 1996-11-19 Blatt; John A. Rotary clamp for a linear actuator
EP0771614A2 (en) 1995-10-30 1997-05-07 Btm Corporation Powered clamp and gauging apparatus
US5676357A (en) * 1995-11-30 1997-10-14 Aladdin Engineering & Manufacturing, Inc. Clamp including resilient internal link
US5687961A (en) * 1995-11-30 1997-11-18 Aladdin Engineering & Manufacturing, Inc. Fluid operated clamp including integral frame and slide member support
US5853211A (en) * 1997-01-10 1998-12-29 Btm Corporation Universal gripper
US5871250A (en) * 1997-03-31 1999-02-16 Btm Corporation Sealed straight line gripper
US5956992A (en) * 1997-01-24 1999-09-28 Patton; Tommy L. Spreading, crushing or cutting device
US6079896A (en) * 1998-01-07 2000-06-27 Isi Norgren, Inc. Clamp with improved internal cam action
US6115898A (en) * 1995-06-06 2000-09-12 Btm Corporation Force multiplying apparatus for clamping a workpiece and forming a joint therein
US6290210B1 (en) 1999-06-01 2001-09-18 Aladdin Engineering & Manufacturing Clamping and lifting mechanism
US6412845B1 (en) 2000-07-07 2002-07-02 Btm Corporation Sealed gripper
US6634630B2 (en) 1999-06-01 2003-10-21 Aladdin Engineering & Manufacturing Clamping and lifting mechanism
US20030197389A1 (en) * 1998-08-04 2003-10-23 Moilanen Steven M. Modular stamped parts transfer gripper
US20030222469A1 (en) * 1998-08-04 2003-12-04 Moilanen Steven M. Clamp assembly
US20040004366A1 (en) * 1996-10-07 2004-01-08 Moilanen Steven M. Modular stamped parts transfer gripper
US20060125167A1 (en) * 2004-12-15 2006-06-15 Steele Kenneth A Pin clamp assembly
US20060128222A1 (en) * 2004-04-02 2006-06-15 Mcintosh Bruce D Pin clamp accessories
US20070182080A1 (en) * 2004-04-02 2007-08-09 Phd, Inc. Pin Clamp
US20070267795A1 (en) * 2006-02-06 2007-11-22 Parag Patwardhan Pin clamp transfer assembly and method of transferring a workpiece
US20080018124A1 (en) * 2006-07-18 2008-01-24 Syron Engineering & Manufacturing, Llc Gripper with central support
US7568372B1 (en) 2008-05-13 2009-08-04 Tommy L. Patton Hydraulic rescue tool
US20090315236A1 (en) * 2008-06-18 2009-12-24 Phd, Inc. Strip off pin clamp
US7815176B2 (en) 2003-09-11 2010-10-19 Phd, Inc. Lock mechanism for pin clamp assembly
US20100307010A1 (en) * 2009-05-12 2010-12-09 Patton Tommy L Hydraulic rescue tool with quick-change head
US8136803B2 (en) 2007-01-15 2012-03-20 Phd, Inc. Armover clamp assembly
DE102010051163A1 (de) * 2010-11-15 2012-05-16 De-Sta-Co Europe Gmbh Spannvorrichtung
CN102513846A (zh) * 2011-12-29 2012-06-27 济南二机床集团有限公司 一种自动锁紧定位装置
US8413970B2 (en) 2007-06-19 2013-04-09 Phd, Inc. Pin clamp assembly
CN113210707A (zh) * 2021-06-08 2021-08-06 浙江锐力智能装备有限公司 一种棒料切割机

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3022376C2 (de) * 1980-06-14 1985-08-01 De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt Kniehebelspannvorrichtung zum Festspannen von Werkstücken
DE3938208C1 (nl) * 1989-11-17 1990-11-22 Josef Gerhard 4030 Ratingen De Tuenkers
DE9412722U1 (de) 1994-08-06 1994-09-29 DE-STA-CO Metallerzeugnisse GmbH, 61449 Steinbach Kniehebelspannvorrichtung
DE29516531U1 (de) * 1995-10-19 1995-12-14 Tünkers Maschinenbau GmbH, 40880 Ratingen Kniehebelspannvorrichtung
DE29718643U1 (de) * 1997-10-21 1997-12-11 Tünkers Maschinenbau GmbH, 40880 Ratingen Druckmittelbetätigbare kombinierte Zentrier- und Spannvorrichtung, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie
CN104227562B (zh) * 2014-08-28 2017-12-22 黑龙江北鸥卫浴用品有限公司 一种cnc六轴联动加工卫浴铸件装置
CN117427855B (zh) * 2023-12-20 2024-03-08 常州铭赛机器人科技股份有限公司 工件夹持装置、工件夹持方法

Cited By (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724837A (en) * 1970-09-02 1973-04-03 Dover Corp Retracting clamp
US4358099A (en) * 1978-05-30 1982-11-09 Matsushita Electrical Industrial Co. Ltd. Stator core holding device for fabricating a stator assembly for an electrical machine
US4496138A (en) * 1982-03-26 1985-01-29 Blatt Leland F Power operated clamp
US4570914A (en) * 1982-03-26 1986-02-18 Blatt Leland F Power operated clamp
US4637597A (en) * 1982-09-29 1987-01-20 De-Sta-Co Division/Dover Corporation Locking power clamp
US4458889A (en) * 1982-09-29 1984-07-10 Dover Corporation (De-Sta-Co. Div.) Locking power clamp
US4537085A (en) * 1983-01-24 1985-08-27 Valentine Al L Pivotal lift apparatus
US4494739A (en) * 1983-03-04 1985-01-22 State Die & Engineering, Inc. Power operated rotatable clamping assembly
US4593573A (en) * 1984-12-18 1986-06-10 Bond Irvin D Inversion cam and cylinder power means
US4858735A (en) * 1985-06-18 1989-08-22 Heddle Richard W Stationary pivot mechanism for use with a damper
US4867417A (en) * 1988-03-28 1989-09-19 Williamson Robert L Power lift-assist apparatus
US4882970A (en) * 1989-01-04 1989-11-28 The United States Of America As Represented By The Secretary Of The Navy Motion translator
US4905973A (en) * 1989-01-11 1990-03-06 Blatt John A Power operated clamp with externally mounted adjustable clamp arm
DE8913386U1 (de) * 1989-11-13 1991-03-14 De-Sta-Co Metallerzeugnisse Gmbh, 6000 Frankfurt Spannvorrichtung
US5490663A (en) * 1992-08-07 1996-02-13 United Technologies Automotive, Inc. Slide actuated holding clamp
US5503378A (en) * 1992-10-30 1996-04-02 Delaware Capital Formation, Inc. Clamping chuck
US5460358A (en) * 1993-11-29 1995-10-24 Sendoykas; Jack J. Power clamp
US5575462A (en) * 1994-08-17 1996-11-19 Blatt; John A. Rotary clamp for a linear actuator
US6115898A (en) * 1995-06-06 2000-09-12 Btm Corporation Force multiplying apparatus for clamping a workpiece and forming a joint therein
EP0771614A2 (en) 1995-10-30 1997-05-07 Btm Corporation Powered clamp and gauging apparatus
US5884903A (en) * 1995-10-30 1999-03-23 Btm Corporation Powered clamp and gauging apparatus
US5676357A (en) * 1995-11-30 1997-10-14 Aladdin Engineering & Manufacturing, Inc. Clamp including resilient internal link
US5816567A (en) * 1995-11-30 1998-10-06 Aladdin Engineering And Manufacturing, Inc. Fluid operated clamp including integral frame and slide member support
US5687961A (en) * 1995-11-30 1997-11-18 Aladdin Engineering & Manufacturing, Inc. Fluid operated clamp including integral frame and slide member support
US7032944B2 (en) * 1996-10-07 2006-04-25 Phd, Inc. Modular stamped parts transfer gripper
US20040004366A1 (en) * 1996-10-07 2004-01-08 Moilanen Steven M. Modular stamped parts transfer gripper
US5938259A (en) * 1997-01-10 1999-08-17 Btm Corporation Pad for universal gripper
US5853211A (en) * 1997-01-10 1998-12-29 Btm Corporation Universal gripper
US5956992A (en) * 1997-01-24 1999-09-28 Patton; Tommy L. Spreading, crushing or cutting device
US5871250A (en) * 1997-03-31 1999-02-16 Btm Corporation Sealed straight line gripper
USRE41223E1 (en) * 1998-01-07 2010-04-13 Norgren Automotive, Inc. Clamp with improved internal cam action
US6079896A (en) * 1998-01-07 2000-06-27 Isi Norgren, Inc. Clamp with improved internal cam action
USRE39786E1 (en) * 1998-01-07 2007-08-21 Norgren Automotive, Inc. Clamp with improved internal cam action
US20030197389A1 (en) * 1998-08-04 2003-10-23 Moilanen Steven M. Modular stamped parts transfer gripper
US20030222469A1 (en) * 1998-08-04 2003-12-04 Moilanen Steven M. Clamp assembly
US7021687B2 (en) * 1998-08-04 2006-04-04 Phd, Inc. Clamp assembly
US6634630B2 (en) 1999-06-01 2003-10-21 Aladdin Engineering & Manufacturing Clamping and lifting mechanism
US6290210B1 (en) 1999-06-01 2001-09-18 Aladdin Engineering & Manufacturing Clamping and lifting mechanism
US6412845B1 (en) 2000-07-07 2002-07-02 Btm Corporation Sealed gripper
US7815176B2 (en) 2003-09-11 2010-10-19 Phd, Inc. Lock mechanism for pin clamp assembly
US20060128222A1 (en) * 2004-04-02 2006-06-15 Mcintosh Bruce D Pin clamp accessories
US20070182080A1 (en) * 2004-04-02 2007-08-09 Phd, Inc. Pin Clamp
US7467788B2 (en) 2004-04-02 2008-12-23 Phd, Inc. Pin clamp
US7516948B2 (en) 2004-04-02 2009-04-14 Phd, Inc. Pin clamp accessories
US20060125167A1 (en) * 2004-12-15 2006-06-15 Steele Kenneth A Pin clamp assembly
US7448607B2 (en) 2004-12-15 2008-11-11 Phd, Inc. Pin clamp assembly
US20070267795A1 (en) * 2006-02-06 2007-11-22 Parag Patwardhan Pin clamp transfer assembly and method of transferring a workpiece
WO2008011209A1 (en) 2006-07-18 2008-01-24 Syron Engineering & Manufacturing, Llc. Gripper with central support
US8297673B2 (en) 2006-07-18 2012-10-30 Norgren Automation Solutions, Llc Gripper with central support
US20080018124A1 (en) * 2006-07-18 2008-01-24 Syron Engineering & Manufacturing, Llc Gripper with central support
US7837247B2 (en) 2006-07-18 2010-11-23 Syron Engineering & Manufacturing, Llc Gripper with central support
US20110018292A1 (en) * 2006-07-18 2011-01-27 Syron Engineering & Manufacturing, Llc Gripper with central support
US8070202B2 (en) 2006-07-18 2011-12-06 Syron Engineering & Manufacturing, Llc Gripper with central support
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US7568372B1 (en) 2008-05-13 2009-08-04 Tommy L. Patton Hydraulic rescue tool
US20090315236A1 (en) * 2008-06-18 2009-12-24 Phd, Inc. Strip off pin clamp
US8376336B2 (en) 2008-06-18 2013-02-19 Phd, Inc. Strip off pin clamp
US7937838B2 (en) 2009-05-12 2011-05-10 Patton Tommy L Hydraulic rescue tool with quick-change head
US20100307010A1 (en) * 2009-05-12 2010-12-09 Patton Tommy L Hydraulic rescue tool with quick-change head
DE102010051163A1 (de) * 2010-11-15 2012-05-16 De-Sta-Co Europe Gmbh Spannvorrichtung
CN102513846A (zh) * 2011-12-29 2012-06-27 济南二机床集团有限公司 一种自动锁紧定位装置
CN113210707A (zh) * 2021-06-08 2021-08-06 浙江锐力智能装备有限公司 一种棒料切割机

Also Published As

Publication number Publication date
LU59595A1 (nl) 1970-04-10
NL157532B (nl) 1978-08-15
GB1281598A (en) 1972-07-12
DE1950721A1 (de) 1970-06-11
NL6915033A (nl) 1970-04-10
FR2020171A1 (nl) 1970-07-10
BE739956A (nl) 1970-04-08

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