US3754432A - Force unit for metal working - Google Patents

Force unit for metal working Download PDF

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Publication number
US3754432A
US3754432A US00038406A US3754432DA US3754432A US 3754432 A US3754432 A US 3754432A US 00038406 A US00038406 A US 00038406A US 3754432D A US3754432D A US 3754432DA US 3754432 A US3754432 A US 3754432A
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United States
Prior art keywords
ram
force unit
work piece
power
piston
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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
US00038406A
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English (en)
Inventor
W Hagerty
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.)
Hein Werner Corp
Original Assignee
Individual
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Publication date
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Publication of US3754432A publication Critical patent/US3754432A/en
Assigned to HEIN-WERNER CORPORATION reassignment HEIN-WERNER CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). Assignors: KANSAS JACK, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/14—Straightening frame structures
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S72/00—Metal deforming
    • Y10S72/705—Vehicle body or frame straightener

Definitions

  • ABSTRACT A force unit that may be readily employed to develop a pulling force for physically shaping, or molding, a work piece by bending, is disclosed.
  • This invention generally relates to devices that may be employed to apply a pulling force to a work piece to be shaped or molded. More specifically, the present invention concerns a force unit that serves to develop pulling forces which are typically employed to bend metal work pieces such as portions of a damaged automobile to be restored to an original configuration.
  • the present invention involves a cured at one end to an appropriate support.
  • a power member is adapted to be vertically extended or retracted by being attached to the piston of the ram. Pulling forces are applied to a work piece by a load chain or cable that is secured to the work piece and to the force unit at the respective ends thereof.
  • a fulcrum pulley which is secured to either the ram or a support post serves to feed the line from the work piece to the power member.
  • An anchor is provided to restrain movement of the force unit in the direction of the work piece. The anchor and the fulcrum pulley are horizontally positioned with respect to each other such that resultant forces created during the operation of the force unit are substantially directed along the longitudinal axis of the ram. 7
  • the subject force unit includes a hydraulically operated ram having a sleeve that is strig accordance with the present invention.
  • FIG. 4 is an isometric diagram illustrating perspective view of an alternate base employable with the present invention.
  • FIG. 5 is an isometric diagram illustrating a perspective view of an alternate power member usable with the present invention.
  • FIG. 6 is a schematic diagram illustrating a partially fragmented side view of a force unit equipped with the alternate power member shown in FIG. 5 and adapted to have a removable collar for enabling secondary pulls to be made.
  • a force unit in accordance with the present invention, essentially includes a hydraulically operated ram 12, a power member 14, a fulcrum pulley l6, and an anchor member 18.
  • the hydraulically operated ram 12 serves as the source of the desired pulling forces.
  • a suitable ram includes an outer cylindrical sleeve 22 and an extensible or telescoping piston 24.
  • the cylindrical sleeve 22 should be adapted to be securely mounted at a mounting end 26 to a supporting member, such as a base member 20.
  • An input port 28, to which an appropriate source of power may be attached, is appropriately mounted on the sleeve 22 and serves to communicate with a hydraulic chamber formed by the sleeve 22.
  • Any of the conventional sources of hydraulic power such as a pressurized fluid container, may be employed to power the ram 12 and cause the piston 24 to be extended.
  • a suitable fluid valve (not shown), of a type well known in the prior art, may be employed to control the application of pressurized fluid to the ram 12 through the input port 28.
  • An exemplary ram that is suitable for use with the present invention is commercially available as Model RC] 59, manufactured by the Blackhawk Manufacturing Company.
  • the power member 14 serves to forcibly retract a load chain 30, by being urged upward by movement of the piston 24.
  • the power member 14 may include a U- shaped yoke 32 having a pair of arms 34 and 36 and a cylindrical body portion 38.
  • the body portion 38 is adapted to be secured to an end of the piston 24. Screw threads cut about the inner surface of the body portion 38 and matching a set of screw threads cut about the outer surface of the piston 24, at the end thereof, may be used to secure the yoke 32 to the ram 12.
  • a sprocket wheel 40 is rotatably mounted between the pair of arms 34 snd 36.
  • a centrally located aperture through which an axle or pin 41 is extended may be employed to mount the wheel 40 on the yoke 32.
  • the periphery of the sprocket wheel 40 is shaped to have a series of alternating flat portions 42 and pointed portions 44.
  • the flat portions 42 are adapted to accommodate a link of the chain 30 when laid flat against the periphery of the wheel 40.
  • the pointed portions 44 are adapted to extend between alternate links of the chain 30 so as to engage the chain 30 as the power member 14 is forced upward by extension of the piston 24.
  • each of the pointed portions 44 are slotted to accommodate the edge of alternate links of the load chain 30.
  • the fulcrum pulley 16 serves to redirect and feed the load chain 30 from a work piece towards the power member 14 as indicated by the arrow 48.
  • the fulcrum pulley also includes a yoke formed by a pair of arms 50 and 52 and a portion of an O-shaped bracket 54.
  • a sprocket wheel 56 that may be identical in design to the sprocket wheel 40, is rotatably mounted between the arms 50 and 52 which extend from the O-shaped bracket 54.
  • Each of the arms 50 and 52 may be shaped and sized to extend beyond the periphery of the sprocket wheel 56 for the purpose of guiding the load chain 30 onto the sprockets of the wheel 56 as the chain 30 is retracted in the direction indicated by the arrow 48.
  • a leaf spring 58 is secured to the bracket 54 between the arms 50 and 52 and serves to bias the individual links of the load chain 30 against the sprocket wheel 56 to prevent disengagement.
  • the O-shaped bracket 54 is sized to be fit about the cylindrical sleeve 22 of the ram 12 or about a support post 60 (FIG. 3), which is sized to have an outer diameter equal to the outer diameter of the sleeve 22 and which may be employed to elevate the ram 12 and the elements attached thereto.
  • the support post 60 may be adapted to be secured to the cylindrical sleeve 22 and to the base member 20 in any conventional manner such as by having the respective elements to be joined properly sized and threaded to allow a threaded coupling of the type well known to any person of ordinary skill in the art. For the alternative, any other well known mechanical technique may be used.
  • the O- shaped bracket 54 is adapted to have a gap (not shown), between the arms 50 and 52, to enable the inner diameter of the bracket 54 to be reduced, by rotation of a threaded tightening bolt 62, for the purpose of clamping the fulcrum pulley 16 in a desired vertical position. It has been found that clamping the fulcrum pulley 16 in place effectively draws the arms 50 and 52 together. However, such slight inward movement of the arms 50 and 52 does not affect operation of the fulcrum pulley 16 when the bracket 54, the distance between the arms 50 and 52, and the thickness of the sprocket wheel 56, are appropriately sized.
  • the bracket 54 is designed to have a vertically situated flange 64 extending from an outer surface of the bracket 54 at a position diametrically opposite the arms 50 and 52.
  • the anchor member 18 is appropriately secured to the flange and serves to restrain the force unit from movement in the direction of the work piece. This may be accomplished by coupling opposite ends of an anchor chain or cable to the anchor member 18 and to a relatively immovable body such as the floor of a work area.
  • an acceptable base plate 66 may have a flat configuration.
  • An attaching member 68 having an appropriate configuration, may be centrally located on the base plate 66.
  • a support post 60 may be attached to the base plate 66 for the purpose of elevating a force unit.
  • the vertical support post 60 may be formed as a single cylindrical element of any desired length. In the ordinary use of a force unit for developing pulling forces for the repair of automobiles, a variety of lengths may be required to accommodate an assortment of different pull directions, Accordingly, a number of cylindrical elements may be serially connected to provide a support post 60 of desired height.
  • An auxiliary anchor 70 may be fastened to the base plate 66 by an appropriate ring 72 for the purpose of providing an additional restraining force for the force unit whenever necessary.
  • the anchor 70 may be secured to an immovable independent body by an anchor chain 74 to provide the desired restraining force. It has been found that the additional restraining force provided by the anchor 70 may be useful whenever the force unit is employed to make a downward pull, i.e., the load chain 30 (FIG. 1), is drawn away from a work piece in a downward direction.
  • a rail 76 as illustrated by FIG. 4, may be employed.
  • the ram 12 may again be either directly secured to the rail 76 or through a support post of desired length.
  • a hole 78, or a suitable attaching member, may be included for this purpose when a rail 76 is used.
  • an anchor chain 80 or the like, may be used to secure the force unit to the rail 76 by being fastened to a ring or loop 82 which may be provided for this purpose.
  • the use of the rail 76 enables the force unit to be employed in the fashion of conventional units wherein the rail 76 is also attached to the work piece.
  • a loop 84 at the end 86 of the rail 76 is provided for such conventional attachment.
  • the ram 12 of a force unit may be simply retained in a hole that has been suitably placed in the floor of a work shop.
  • a load chain 30 is secured at one end thereof to a work piece, such as a portion of a damaged automobile.
  • the opposite end 88 of the load chain 30 may be secured to a forked member 90 having a pair of fingers through which the load chain 30 is inserted and retained.
  • Any other suitable means of securing the end 88 of the load chain 30 to the force unit may be employed.
  • the loop 72 on the flat base 66 (FIG. 3) may be employed for this purpose.
  • FIGS. 5 and 6 An alternate power member provided for this purpose, is illustrated by FIGS. 5 and 6.
  • an alternate power member 94 may be cylindrical and have alower end 96 that is adapted to be attached to the piston 24 of the ram 12.
  • the upper end 98 is adapted to have a slot 100 having a width and depth intended to accommodate a chain link 102, at the end of the load chain 30, as shown.
  • a suspended chain link 104 will serve to retain the chain 30 in the slot 100 as the power member 94 is moved in an upward direction as indicated by the arrow 105.
  • the power member 94 will serve to move the load chain 30 for a distance exactly equal to the distance through which the piston 24 is moved.
  • employment of the power member 14 (FIG. 1) will cause retraction of a length, of the load chain 30, equal to twice the distance moved by the piston 24.
  • a removable collar 106 may be attached to the fulcrum pulley 16 with a pin 108.
  • the pin 108 may also serve as the axle mounting the sprocket wheel 56 between the arms 50 and 52 or may be an independent member.
  • the axle for the sprocket wheel 56 should have an axial bore to accommodate the pin 108.
  • the collar 106 may serve to conveniently enable secondary pulls to be made with a second load chain 110 that is appropriately powered, such as by a block and tackle. The benefit of using th collar is that the pulling 6s forces may be generally directed through a common point on a force unit.
  • a hydraulically operated ram including a cylindrical sleeve and an extensible piston, said ram being ver- ,tically positioned to enable said piston to be extended upwardly along an essentially vertical axis;
  • a power-member operatively connected to said piston to developsaid pulling force on said pulling chain by extension of said piston;
  • a fulcrum pulley secured to said cylindrical sleeve of said ram at a selected position along said vertical axis for directing said flexible cable from said work piece to said power member;
  • a support post having an elongate cylindrical configuration, said support post serving to elevate said ram, said fulcrum pulley being adapted to be secured at selected positions along said support post;
  • anchor means for restraining said force unit from movement in the direction of said work piece, said anchor means being connected to a stationary body independent of said work piece;
  • support means for maintaining said ram in a vertical position, said support means being independent of any contact or connection with said work piece other than through said flexible cable.
  • said power member includes:
  • a yoke having a body portion and a pair of parallel arms extending from said body portion, said body portion being adapted for attachment to said extensible piston;
  • a sprocket wheel rotatably mounted between said pair of parallel arms.
  • said power member includes a cylindrical element having a first end adapted for attachment to said extensible piston and a second end having a longitudinal slot for receiving an end of said flexible cable.
  • a yoke having a pair of arms
  • a sprocket wheel rotatably mounted between said pair of arms;
  • bracket means for securing said yoke at a selected position along said cylindrical sleeve
  • bias means for urging engagement of said flexible cable with said sprocket wheel, said bias means being secured to said yoke and extending between said pair of arms.
  • said anchor means includes a coupling device attached to said bracket means at a point diametrically opposite said pair of arms and situated along an essentially horizontal line extending tangentially to a lowermost peripheral point of said sprocket wheel.
  • said support means comprises a flat plate having a centrally located mounting means for receiving said support post and ram.
  • said flat plate further includes means for securing said support means to an immovable independent body.
  • aid support means includes an elongate member having: 7
  • said power member includes:
  • a power yoke having a body portion and a pair of parallel arms extending from said body portion, said body portion being adapted for attachment to said extensible piston;
  • a power sprocket wheel rotatably mounted between said pair of parallel arms included on said power yoke.
  • the apparatus defined by claim 10 further including means positioned on said ram for securing an end of said flexible cable to said force unit.
  • said power member includes a cylindrical element having a first end adapted for attachment to said extensible piston and a second end having a longitudinal slot for receiving an end of said flexible cable.
  • said support means comprises a flat plate having a centrally located mounting means for receiving said support post and ram.
  • a force unit for transmitting a pulling force to a work piece via a pulling chain comprising:
  • a hydraulically operated ram having an extensible member and a stationary member forming two ends of the ram, extension of the extensible member operating to separate said two ends along a longitudinal axis of the ram;
  • a base for supporting the ram in a substantially vertical position atop a supporting surface, said base being operatively connected to said stationary member and aligned along said longitudinal axis, said base being independent of any contact or connection with the work piece other than via the pulling chain;
  • a cylindrical support post for elevating said ram by being interposed between, and connected, to said base and said stationary member of said ram;
  • a fulcrum pulley secured to said stationary member of said ram for directing the pulling chain from the work piece to the power member;
  • anchor means for anchoring said force unit to said supporting surface to substantially restrain movement of said force unit towards said work piece.
  • said fulcrum pulley including:
  • yoke means for securing said sprocket wheel to said force unit along said longitudinal axis, said yoke means including a pair of arms between which said sprocket wheel is rotatably mounted, the pulling chain engaging said sprocket wheel to direct said chain from the work piece to the power member.
  • said fulcrum pulley further including means for urging engagement of said chain with said sprocket wheel.
  • said anchor means including a coupling device attached to said yoke means at a point along said longitudinal axis and opposite said pair of arms, said anchor means adapted to receive an anchor chain for connection to said sup porting surface.
  • the force unit defined by claim 16 further including means positioned on said force unit along said longitudinal axis for securing an end of said pulling chain, said power member including:
  • a power yoke having a body portion and a pair of upstanding parallel arms extending therefrom, said body portion being adapted for attachment to said extensible member of said ram;
  • a power sprocket wheel rotatably mounted between said pair of upstanding arms for receiving said power chain.
  • a hydraulically operated ram including a cylindrical sleeve and an extensible piston, said piston being adapted to be housed by said sleeve and extended therefrom along a longitudinal axis mutual to said sleeve and said piston; power pulley operatively connected to an end of said piston to be moved by extension of said piston from said sleeve;
  • a fulcrum pulley secured to an exterior surface of said sleeve for receiving and directing said flexible cable from said work piece towards said power pulley, said extension of said piston and movement of said power pulley causing said flexible cable to exert a pulling force on a work piece attached to said flexible cable;
  • said a yoke having a body portion and a pair of parallel anchor means being a flexible member operatively arms extending in a direction away from said end connected between said sleeve and a stationary of said piston and parallel to said longitudinal axis body that is independent of said work piece; and of said ram, said body portion attached to said end support means for supporting said ram in an upright of said piston; and
  • said support means being independent of a sprocket wheel rotatably mounted between said any contact or connection with said work piece pair of parallel arms, said sprocket wheel engaging other than through said flexible cable.
  • said flexible cable to produce said pulling force by 22.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
US00038406A 1970-05-18 1970-05-18 Force unit for metal working Expired - Lifetime US3754432A (en)

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US3840670A 1970-05-18 1970-05-18

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JP (1) JPS5759209Y2 (en:Method)
CA (1) CA943819A (en:Method)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891187A (en) * 1973-10-19 1975-06-24 Jr Richard D Bearden Portable rescue device
US3893329A (en) * 1972-08-08 1975-07-08 Antonius Albertus Roes Straightening equipment
US3955397A (en) * 1974-04-29 1976-05-11 Meis William J Apparatus for pulling deformations from sheet metal and metal frames of vehicles and the like
US4151737A (en) * 1974-08-12 1979-05-01 Specktor Gerald A Apparatus for repairing and straightening
US4747579A (en) * 1987-03-23 1988-05-31 Rich John W Post frame machine
US4854151A (en) * 1987-11-16 1989-08-08 Belgarde Richard J Apparatus for realigning vehicle body and frame members
US5317891A (en) * 1990-11-28 1994-06-07 Hein-Werner Corporation Free standing pull tower
US10759628B2 (en) 2016-02-12 2020-09-01 Bardex Corporation Link coupler, chainwheel, and assembly thereof for coupling and moving chains of different sizes
US11008071B2 (en) * 2016-02-12 2021-05-18 Bardex Corporation Rotary chain jack that maintains tension in a mooring line/chain

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4648279B2 (ja) * 2006-09-28 2011-03-09 株式会社サクラ 修復修整装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1325964A (en) * 1919-12-23 Lifting
US3122194A (en) * 1961-09-26 1964-02-25 Kel Inc Automobile body and part straightening tool
US3304059A (en) * 1965-04-06 1967-02-14 John W Siliznoff Force-applying means having adjustable coupling means for adjustably coupling the same to at least two objects to be forcibly relatively moved
US3340720A (en) * 1964-11-30 1967-09-12 Guy Chart Tools Ltd Automobile repair tool
US3492855A (en) * 1967-11-20 1970-02-03 Cleyburn M Wylie Body and frame straightening tool
US3566667A (en) * 1968-10-28 1971-03-02 William Kenneth Hagerty Multidirection power actuated force unit
US3577881A (en) * 1969-07-25 1971-05-11 Eugene J Markovics Portable highway crash rescue unit
US3583203A (en) * 1969-05-15 1971-06-08 Vian Jack C Vehicle frame and body-straightening tool
US3612482A (en) * 1970-01-16 1971-10-12 Kansas Jack Inc Portable apparatus for applying a pulling force to structures
US3630066A (en) * 1969-03-27 1971-12-28 Finis L Chisum Apparatus for returning vehicle body and frame components to their original locations during repair and servicing of vehicles

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1325964A (en) * 1919-12-23 Lifting
US3122194A (en) * 1961-09-26 1964-02-25 Kel Inc Automobile body and part straightening tool
US3340720A (en) * 1964-11-30 1967-09-12 Guy Chart Tools Ltd Automobile repair tool
US3304059A (en) * 1965-04-06 1967-02-14 John W Siliznoff Force-applying means having adjustable coupling means for adjustably coupling the same to at least two objects to be forcibly relatively moved
US3492855A (en) * 1967-11-20 1970-02-03 Cleyburn M Wylie Body and frame straightening tool
US3566667A (en) * 1968-10-28 1971-03-02 William Kenneth Hagerty Multidirection power actuated force unit
US3630066A (en) * 1969-03-27 1971-12-28 Finis L Chisum Apparatus for returning vehicle body and frame components to their original locations during repair and servicing of vehicles
US3583203A (en) * 1969-05-15 1971-06-08 Vian Jack C Vehicle frame and body-straightening tool
US3577881A (en) * 1969-07-25 1971-05-11 Eugene J Markovics Portable highway crash rescue unit
US3612482A (en) * 1970-01-16 1971-10-12 Kansas Jack Inc Portable apparatus for applying a pulling force to structures

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893329A (en) * 1972-08-08 1975-07-08 Antonius Albertus Roes Straightening equipment
US3891187A (en) * 1973-10-19 1975-06-24 Jr Richard D Bearden Portable rescue device
US3955397A (en) * 1974-04-29 1976-05-11 Meis William J Apparatus for pulling deformations from sheet metal and metal frames of vehicles and the like
US4151737A (en) * 1974-08-12 1979-05-01 Specktor Gerald A Apparatus for repairing and straightening
US4747579A (en) * 1987-03-23 1988-05-31 Rich John W Post frame machine
US4854151A (en) * 1987-11-16 1989-08-08 Belgarde Richard J Apparatus for realigning vehicle body and frame members
US5317891A (en) * 1990-11-28 1994-06-07 Hein-Werner Corporation Free standing pull tower
US10759628B2 (en) 2016-02-12 2020-09-01 Bardex Corporation Link coupler, chainwheel, and assembly thereof for coupling and moving chains of different sizes
US11008071B2 (en) * 2016-02-12 2021-05-18 Bardex Corporation Rotary chain jack that maintains tension in a mooring line/chain

Also Published As

Publication number Publication date
CA943819A (en) 1974-03-19
JPS5759209Y2 (en:Method) 1982-12-17
JPS5660523U (en:Method) 1981-05-23

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