Chain Patents (Class 24/116R)
  • Patent number: 5920962
    Abstract: In a clamping lock with a housing having a deflecting element for a tension chain which runs over it, wherein a pawl is provided which is swivelable between an open position and a locking position and is pretensioned against the deflecting element and has a projecting nose by which the tension chain can be locked in the direction opposite to the tensioning direction, and with a slot on the side of the housing which extends over the entire height of the housing, through which slot the tension chain is introduced into the housing and can be fitted on the deflecting element, the nose is constructed as a shaped nose which can be introduced into the intermediate space between two longitudinal sides of a chain link of the tension chain and which, with its nose surface located in front in the direction of the locking position, constitutes an extension, substantially in a straight line, of the outer surface of a pawl leg leading to the swivel pin of the pawl and is provided with a guide groove which is located in the
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: July 13, 1999
    Assignee: Acciaierie Weissenfels S.p.A.
    Inventor: Charles R. Franklin
  • Patent number: 5906032
    Abstract: A coupling link (100) to be interconnected between a hoisting device and a shortenable hoisting chain (54,55,56) is provided. The coupling link is elongated and comprises a connecting portion (110) in the form of a loop for connection to the hoisting device and an anchoring portion (150) for anchoring of an end link (51) of the hoisting chain. A selected link, namely a support link (55), of the hoisting chain is inserted in a support slot (132) between two support shanks (131a, 131b) of the coupling link, and a hoisting chain link adjoining the support link, namely an engagement link (54), will make contact, at an end portion thereof, with corresponding seating surfaces (133a, 133b). The loop portion (110) defines a free internal space (111), which is dimensioned to enable pulling through the hoisting chain (50) for adjustment of its effective length and which directly adjoins the support slot (132).
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: May 25, 1999
    Assignee: Frenolink Forvaltnings AB
    Inventor: Lars Fredriksson
  • Patent number: 5829810
    Abstract: A hoisting link device, comprising an upper link part (2) forming a closed loop dimensioned to be hung onto a lifting hook, and a lower chain connection part (3) to be connected to an end portion of a chain hanging down therefrom. The chain connection part comprises a fork-like lower end portion with two substantially parallel shanks (3a, 3b) defining a slot (4) therebetween, a bridge portion (5) connecting the two shanks to each other, an anchoring member (6) located below said bridge portion for securely anchoring an end link of said chain. An upper or central portion (4b) of the slot communicates with an insertion opening (4d) located at one lateral side of the device. The upper portion (4b) of the slot is adapted to accommodate a centrally located support link (102) of the chain end portion (3) so as to form a shortening loop between the centrally located link and the end link of the hoisting chain.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: November 3, 1998
    Assignee: Frenolink Forvaltnings AB
    Inventor: Lars Fredriksson
  • Patent number: 5765891
    Abstract: A lifting hook with a hook body (110) and a shank (112), which has a slot (116) with an anchoring member (101) and a bridge portion (115). The lower part of a hoisting chain can be secured to the hook by coupling the end link (51) of the hoisting chain to the anchoring member (101) and inserting a supporting link (52) into the slot adjacent to the bridge portion (115) and to form a loose, non-loaded loop of the hoisting chain between an adjoining engagement link (53) and the anchored end link (51).
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: June 16, 1998
    Assignee: Frenolink Aktiebolag
    Inventor: Lars Fredriksson
  • Patent number: 5724804
    Abstract: A shortening claw is linked to a chain by a passage (17) into which a slot (19) opens. The slot (19) extends up to a bent end (20) of the claw back, receives a chain link (29) and supports the front of another chain link (25).
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: March 10, 1998
    Assignee: RUD-Kettenfabrik Rieger & Dietz GmbH.u.Co.
    Inventor: Reinhard Smetz
  • Patent number: 5697741
    Abstract: A safety chain storage pocket for use with a tow truck comprises a user access surface with a gull wing opening defining a chain access opening providing safety chain exit and storage from and to the pocket. A pair of slotted wings extend from the opening to provide a pair of chain locking positions. The opening has a lower surface providing free movement of the safety chain out of the pocket by allowing the weight of the chain to assist the user to pull the chain out of the pocket, and the chain access opening allows the user vertical access into the pocket to use the weight of the chain to store the chain in the pocket. The slotted wings extend proximate to the chain access opening to provide a locking position for said safety chain.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: December 16, 1997
    Assignee: Jerr-Dan Corporation
    Inventors: Steven C. Harris, Christopher N. Goetz
  • Patent number: 5692270
    Abstract: Devices and methods for effectively shortening the length of a chain or modifying the end hook arrangement of a chain are provided.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: December 2, 1997
    Inventor: Robert J. Dunn
  • Patent number: 5509181
    Abstract: An attachment fitting in which several sets of ball chains can be arranged and the attachment is possible over the entire length of the attachment fitting main body. Also, the strength of the main body is improved.A tubular main body has an opening on one end and can be closed on the other end. A slit is provided in the vicinity of the other end through the opening. A connecting member is provided and extends in the longitudinal direction of the main body which is symmetrical to the slit of the main body. Several protruding pieces are formed and jut out from the circumference of the closure so that the aforementioned opening can be shut. The end of ball of several sets of ball chains is fitted into the main body. A connecting rod of ball chain goes through slit. The attachment is closed through the opening by shutting the closure.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: April 23, 1996
    Assignee: Yoshida Kogyo K.K.
    Inventors: Kenji Yuuki, Kiyoshi Oda, Hideyuki Matsushima
  • Patent number: 5309706
    Abstract: A shackle-type connector for the rapid attachment of a round-linked chain to an external device, such as hydraulic rescue equipment. The connector includes a body having an attachment opening which is capable of removably receiving the device, to attach the connector thereon. The chain can be extended through a chain passage hole in the body of the connector. A holding slot communicates with the hole through a transition region. A securing nose defines a chain passage channel in the transition region. The chain can be drawn through the chain passage hole, and a link of the chain is then slid over the securing nose, through the chain passage channel and into the holding slot, whereby the surrounding links, which are rotated with respect to the link in the holding slot, cannot slide into the holding slot. Thus the securing nose secures the chain in the connector.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: May 10, 1994
    Assignee: Lukas Hydraulik GmbH
    Inventors: Christoph Lasaroff, Dieter Hesse, Wolf Kuhlmann
  • Patent number: 5022694
    Abstract: Safety chain latches remove slack from safety chains attached between towing and towed vehicles in a towing system. In one embodiment, a pivotable retainer element is removably coupled to a remaining portion of the latch body for enabling release of a latched safety line independently of the open or closed position of the retainer element.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: June 11, 1991
    Assignee: Century Wrecker Corporation
    Inventor: Ted D. Thomison
  • Patent number: 5009256
    Abstract: A tire traction device for vehicle tires includes a pair of rope-like side cord members for circumferential placement on the sidewalls of a tire, and a series of wire rope cross cords which interconnect the side cords and extend across the tire tread. The cross cords are connected to the side cords at knotted connections, and a ferrule is attached to the ends of each cross cord outside of each knotted connection to prevent the cross cords from disconnecting from the side cords. Coil spring rollers are supported on the cross cords to provide additional traction. Each cross cord also supports a pair of tubular spacers located inside and adjacent the knotted connections to maintain the rollers in the center of the cross cord. One end of each side cord is knotted into a series of male connector knots while the opposite end of each side cord is knotted into a female loop knot for selective interengagement with one of the male connector knots to join the opposite ends together about a tire.
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: April 23, 1991
    Assignee: Manufacturer's Consultants, Inc.
    Inventor: Franklin G. Smith
  • Patent number: 4941698
    Abstract: A lifting plate for chains. A simple plate with three separate openings. A center opening has a rounded shape, is high on the plate and has a narrow slot extending down the plate centerline to form a balloon-like outline. The other two smaller openings have wide upper portions with narrow slots extending downward and are located in a balanced configuration on either side of the lower slot of the larger hole. The upper parts of the smaller holes are sized too small to permit the chain end hooks to freely pass through, but they are located closed enough to the edge of the plate to permit the hooks to be moved through the holes by twisting them through. The three holed configuration permits creating double chain slings with different lengths of chain in each leg and storing the excess chain between the holes.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: July 17, 1990
    Assignee: Lift-All Company, Inc.
    Inventors: Jeffrey M. Klibert, Stephen S. Kleinert, Robert L. Bennett
  • Patent number: 4889372
    Abstract: A cargo box door swing limit apparatus includes a flexible elongate member and attachment points at intervals along the member so that the apparatus can be used with most of the various trailer latch arrangements.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: December 26, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Howard C. Dege, Paul R. Gilmore
  • Patent number: 4883191
    Abstract: A keeper is disclosed for releasable attachment to a chain in order to support a gathered length of the chain at a safe, yet accessible overhead location above the ground surface. The keeper includes a tubular body which can be used to accumulate a length of chain. A finger at an upward, open end of the body may be releasably hooked between openings of adjacent links of the chain in order to suspend the keeper and the accumulated chain length at the selected elevation. The finger is preferably resilient or, alternatively, pivotal to facilitate disengagement of the keeper from the chain by simply pulling downwardly on the keeper handle. The keeper may be completely removed from the chain by pulling forcibly downward on the keeper to disengage the finger from the chain and allow the keeper and chain to move downwardly to the point where the keeper becomes completely disengaged from the chain.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: November 28, 1989
    Inventor: Kean Christensen
  • Patent number: 4850768
    Abstract: An improved geometry for links used in a tiedown chain adapted for attachment to a widely used style of a chain tensioning and securing device. The links are nonreversible, and are longitudinally nonuniform to prevent inadvertent reversed insertion of the chain in the anchoring device.
    Type: Grant
    Filed: April 19, 1988
    Date of Patent: July 25, 1989
    Assignee: Breeze Corporation
    Inventor: John R. Huber
  • Patent number: 4809496
    Abstract: A mechanism for joining a chain end to a chain link utilizes a sliding link connected to a first link of the chain. The sliding link can be disengaged only by displacing it onto the straight portion of the first link and moving it forwardly to a second position. For connection, the sliding link is moved about the straight portion to a third position and is then moved upon engagement of a second chain link by an opposite displacement back to the locking position. Thus locking and unlocking is achieved only by two specific movements of the sliding link. Inadvertent unlocking is prevented by the shape and position of the sliding link.
    Type: Grant
    Filed: July 6, 1987
    Date of Patent: March 7, 1989
    Inventor: Ragnar T. Boasson
  • Patent number: 4694667
    Abstract: In order to avoid separation of a padlock and chain which are utilized together, an assembly including a pair of brackets is employed. The brackets are each formed of bent sheet metal stock with upstanding ears and outwardly extending arms which over-lie one another. The two arms have opposed notches for receiving and holding a link of the chain when the brackets are secured together by a one-way screw extending through the overlapping portions of the brackets, between the bracket ears. The bracket ears have spaced, aligned holes for receiving the pivot shank of the shackle of a padlock.
    Type: Grant
    Filed: July 26, 1985
    Date of Patent: September 22, 1987
    Inventor: Allan M. Hodge
  • Patent number: 4693097
    Abstract: A portable chain lock for a chain binder used to tighten a chain holding a load on a truck flat bed. The portable chain lock has an open body with a pin fixed to a bottom wall and extending outwardly between a pair of sidewalls. One of the sidewalls has the first end of a locking chain fixed thereto while the other sidewall has a holding arm having an opening fixed thereto. The pin is passed through a chain link or other opening in one half of the chain binder when the chain binder is in the tightened position. The locking chain is wrapped around the other half of the chain binder with its second or free end looped over the holding arm and secured to the holding arm by a padlock passed through the opening in the holding arm, to thereby lock the chain binder in the chain tightened position.
    Type: Grant
    Filed: June 9, 1981
    Date of Patent: September 15, 1987
    Inventor: Charles A. Rivera
  • Patent number: 4686746
    Abstract: A device for separating at least two neck chains, each having at least one fixed ring thereon, comprising: a chain separator means including a pair of elongated members and a biasing means urging said elongated members in close substantially parallel relationship to each other; at least one of said elongated members having a plurality of first portions extending toward the other elongated member and a plurality of second portions alternatingly spaced between said first portions, said second portions each extending away from the other elongated member for a distance sufficient to accommodate one of said fixed rings on said neck chains.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: August 18, 1987
    Inventor: Ronald R. Lockhart
  • Patent number: 4679800
    Abstract: A hawser chain assembly and method for installation of its sealing element is disclosed. The assembly includes a housing adapted for connection in series with a hawser pipe of a marine vessel such as a semi-submersible drilling rig. The housing may be moved to an open position for installation or replacement of the sealing element, and a closed position to longitudinally surround and secure the sealing element. The sealing element has at least two semi-cylindrical elastomeric parts, each of which is adapted for placement partially about the hawser chain when the housing is in the open position. Each semi-cylindrical part has at least one inflatable bladder. A manifold is provided by which fluid pressure may be introduced to the bladders of the sealing element causing them to expand. The sealing element is restricted on its outer diameter by the closed housing causing the elastomeric material to move inwardly forming a sealing engagement with the chain.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: July 14, 1987
    Assignee: Hydril Company
    Inventor: James A. Burton
  • Patent number: 4653595
    Abstract: The present disclosure is directed to a hammer and follow block chain remote release device and method to eliminate the need of a human having to ride the pile driving leads until the follow block is separated from the hammer. This is attained by passing a chain through the follow block and over horns on the hammer. A remote release device is connected to one end of the chain and an elongated link secured to the other end of the chain is engaged with the release device and a remotely actuated coupling member is pulled to release the connection between the chain and release device to permit separation of the follow block from the hammer by passage of the chain through the follow block and over the horns on the hammer.
    Type: Grant
    Filed: August 28, 1985
    Date of Patent: March 31, 1987
    Assignee: Soloco, Inc.
    Inventor: Francis A. Hebert
  • Patent number: 4635903
    Abstract: There is disclosed a pendant control arrangement for overhead electric hoists featuring a helically wound elastically memorized insulative cord enclosing a plurality of electrical conductors for attachments at their opposite ends to terminals in the hoist motor and in the pendant control switches. This coiled cord encloses a straight line strain relief cable or the like which is of a length equal to the anticipated length required to support the pendant switch control panel at proper elevation below the electric hoist, and simply mechanically connects at its opposite ends to said motor and said control panel. Thus, changes in the distance required between the hoist motor and the control panel are more readily accommodated by reason of the mechanical connections of the relief cable, while leaving the electrical connections of the control cord conductors undisturbed.
    Type: Grant
    Filed: July 29, 1985
    Date of Patent: January 13, 1987
    Assignee: Columbus McKinnon Corporation
    Inventors: Robert H. Broyden, R. Paul Benton, Allen E. Eldridge
  • Patent number: 4611368
    Abstract: A decorative and protective jewelry chain guard having a first half or bottom member, a top half member, generally closed with pressure, slide, hinge or latch. One of said halves having an anchor pin firmly mounted within the guard over which the loop ends of a precious jewelry chain are fixed. The ends of a jewelry chain are placed over the anchor pin or within the chain guard itself and interconnected by a spring latch and the halves of the chain guard are closed around the chain ends.Various decorative treatments can be made to the chain guard for ornamental appearances, but in essence, it is a protective jewelry chain guard used to prevent loss or accidental breakage of the chain and its ends so that there will be less chance of loss to the wearer.
    Type: Grant
    Filed: March 27, 1985
    Date of Patent: September 16, 1986
    Inventor: Norma Battersby
  • Patent number: 4573243
    Abstract: A sliding hook for clasping pearl or similar jewelry necklaces that have both a free and a fixed end including a body having a rear side, a ring of a substantially open turn shape disposed on the body so as to allow for slightly oblique passing of the free end of the necklace, a joining point disposed on the rear side of the body for affixing the fixed end of the necklace, and an articulated annular blade having legs with tension and disposed on the rear side of the body so that the tension of the legs applied against the ring retains the pearl that is disposed between the ring and the annular blade and thus determines the length of the hanging free end of the necklace being passed through the ring.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: March 4, 1986
    Assignee: Majorica, S.A.
    Inventor: Jaime P. Plaza
  • Patent number: 4567840
    Abstract: A closure for a chain entry aperture in which two or more seal blocks of a suitable elastomeric material are slidable between a position in which the aperture is open, and a position in which the seal blocks cooperate to close the aperture and seal around a chain extending through the aperture. Contact surfaces of the seal blocks are shaped to accommodate the chain passing through the aperture when the seal blocks are in the closed position.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: February 4, 1986
    Assignee: LTV Energy Products Company
    Inventors: Edward J. Arlt, L. Blake Whitley
  • Patent number: 4562619
    Abstract: A clasping device for necklaces, bracelets and the like and including two juxtaposed parts, having back faces, and hooking and articulation components attached to the backfaces of the parts and further including a continuous first ring solidly attached to one of the parts and having an arc extending to an articulation point disposed on the other of the parts, the arc forming a second ring when the clasping device is clasped which occurs when the two parts become flush and at the same level with each other.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: January 7, 1986
    Inventor: Jaime P. Plaza
  • Patent number: 4560191
    Abstract: A security device for a door utilizes a first bracket member attached proximate one jamb of a door with a chain attached to said bracket and adapted to be fastened to a second chain engaging bracket member fastened proximate the other jamb of the door. The chain engaging bracket generally defines a U-shaped member having a first leg, a second leg and a saddle. The first leg is adapted to be attached to the jamb or building frame adjacent the door. The second leg comprises slots adapted to receive the links of a chain proximate the end of the legs. The saddle also comprises a slot adapted to receive a link of the chain. The chain is wrapped around the chain engaging bracket whereby a link of the chain is first received and engaged in the slot in the saddle. Then another link of the chain is received and engaged in the slot in the leg distal the slot in the saddle. The path of the chain then passes up for a link to be received and engage a slot in the leg proximal the slot in the saddle.
    Type: Grant
    Filed: July 11, 1983
    Date of Patent: December 24, 1985
    Inventor: Julio J. Grassi
  • Patent number: 4558663
    Abstract: A safety device for attachment to the free-riding ring of a choker-chain or collar to be worn by an animal is in an openable container configuration that is dimensioned to receive said ring and has a slotted wall adapted to accommodate the cross-sectional extent of the collar length. A tubular element contained within the safety device passes through and further secures said ring. Optionally, a plurality of spaced slotted wall means are adapted to assemble the device to the collar whereby the device may be stored at an intermediate section of the collar length when the free-riding ring is to be leashed. The contained parts may be unitarily hinged. One type of hinge is an elongated and apertured strap whereby the device may be slidably mounted on said collar length.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: December 17, 1985
    Inventor: John N. Kaplanis
  • Patent number: 4526251
    Abstract: A retention assembly is disclosed for use with an elongated flexible member (22) such as the lift chain used in a lift truck (10). This assembly consists of a first member (30) affixed to the carriage (28) and having an irregular surface (32) corresponding to the irregular surface (26) of the chain. A second clamping member (34) also has an irregular surface (36) for gripping the lift chain (32) with the first member (30). Fastening members (42 and 44) fix the second member (34) to the first member (30) with the lift chain (22) therebetween.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: July 2, 1985
    Assignee: Towmotor Corporation
    Inventor: Richard J. Johannson
  • Patent number: 4431042
    Abstract: An antiskid tire chain comprises a plurality of cross chains which are systematically arranged in groups of three along the tire chain, one end link of each cross chain in a group being joined in a junction member.
    Type: Grant
    Filed: March 19, 1982
    Date of Patent: February 14, 1984
    Assignee: Norsk Kjettingindustri A-S Alf Nosted
    Inventor: Gordon W. E. Daniel
  • Patent number: 4416319
    Abstract: In tire chains, closures are required to lock tension-chain lines (10) in the tensioned position. A proposed closure is provided with a pull-through orifice (2) for the tension-chain line (10) and with a locking slot (3) adjacent to the pull-through orifice (2). To prevent the particular chain link (9) suspended in the locking slot (3) from working loose, the pull-through orifice (2) is equipped with an elastic insert (11) which forms at least one engagement cam projecting into the locking slot (3).
    Type: Grant
    Filed: July 23, 1982
    Date of Patent: November 22, 1983
    Assignee: RUD-Kettenfabrik Rieger & Dietz GmbH u. Co.
    Inventor: Peter Hofmann
  • Patent number: 4368769
    Abstract: A skid-resisting chain adapted to be attached to and removed from the tires of a vehicle with a minimum of effort to provide improved traction in snow, ice, mud or other slippery road conditions. The attachment-detachment means comprises a flexible metal cable adapted to tie the tire chain around the tire and wheel and a biased cam gripping means adapted to frictionally-engage the end of the cable in a manner which provides increased locking action when a withdrawal force is applied to the cable and yet permits easy release when a tightening force or a detachment force is applied to the cable.
    Type: Grant
    Filed: December 4, 1980
    Date of Patent: January 18, 1983
    Inventor: Jerome L. Rookasin
  • Patent number: 4366850
    Abstract: A cable-type tire chain comprises side members adapted to extend circumferentially around opposite side walls of a tire and cross members connected between the side members so as to extend over and across the tire tread. The cross members comprise cables connected to the side members in a manner permitting rotation of the cross members about their longitudinal axes. The cross member cables have sheaths of helically wound wire which are free to rotate on the cables, and traction sleeves are freely rotatable on the wire sheaths. The traction sleeves have cylindrical body portions and outwardly flared end portions. Notches in the end portions of the sleeves define sharp corners at the ends of the sleeves for biting into ice and the like.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: January 4, 1983
    Assignee: Burns Bros., Inc.
    Inventor: James W. Coutts
  • Patent number: 4357975
    Abstract: An anti-skid tire chain comprising a pair of parallel side chains, a series of traction rings extending medially between the side chains, and a network of connector chains interconnecting the traction rings with the side chains and with one another is characterized in that the connector chains are interconnected in threes by triradial connector plates. Each triradial connector plate consists of three plate elements welded together, each plate element providing a pair of opposite end portions, subtending an angle of to one another and an arcuate mid-portion defining a convex cylindrical surface, the plate elements being mutually welded together at the convex surfaces thereby defining a symmetrical triradial configuration providing three radially extending pairs of parallel arms, each pair of arms defining a clevis for receiving an end link of a respective connector chain, and including a removable clevis pin for retaining the end link.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: November 9, 1982
    Assignee: Dominion Chain Inc.
    Inventor: John F. Baldry
  • Patent number: 4334413
    Abstract: An adjustable necklace of a type in which a length of chain has first and second ends which are each anchored in one of a pair of adjustment elements with a segment adjacent the other end passing through the adjustment element to be resiliently held in position to effect a given adjustment. The adjustment elements each include first and second mating members which enclose an anchor for one end of the chain, a resilient frictional member, and first and second mating housing members having mutually interlocking means permitting rapid assembly with an absence of a soldering operation.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: June 15, 1982
    Inventors: Paul Gaston, Morton W. Schwartz
  • Patent number: 4275486
    Abstract: A device for securing the ends of a snow chain together which includes a plate with an aperture near one end thereof for engagement by a hook on one end of the chain, and a threaded hole near the other end thereof into which is threaded a bolt with a manipulating head and a shoulder to engage a link at the other end of the snow chain.
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: June 30, 1981
    Inventor: Chester L. Bridges
  • Patent number: 4273486
    Abstract: Low-height reversible ratchet tie-down winch for flat decked vehicles. The tie-down winches are adjustably mounted in retainer channels extending along each side of the deck of the vehicle. Each winch is rotatably mounted between the top and bottom walls of its base and tension of the tie-down chain is maintained by a pawl and ratchet. The winch block has a chain pocket to lock a horizontal link of the chain to the chain pocket and a recessed portion engaging a next adjacent vertical link of the chain. The ratchet has a cooperating pocket engageable with a next adjacent vertical link of the chain and completing the chain pocket in the winch block. The chain may be trained through one end or the other of the base for the winch.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: June 16, 1981
    Assignee: Portec, Inc.
    Inventor: Richard A. Tatina
  • Patent number: 4273371
    Abstract: A double ended chain engaging device useful as a chain-to-chain connector or as a chain shortener used to engage different parts of the same interconnected link type chain. A first chain grappling hook member formed with an eye end is articulately joined to the clevis end of a second chain grappling member by a load bearing pin.
    Type: Grant
    Filed: June 20, 1979
    Date of Patent: June 16, 1981
    Assignee: Columbus McKinnon Corporation
    Inventors: Edward R. Behnke, Floyd W. Sanderson
  • Patent number: 4254975
    Abstract: A gate latching apparatus which incorporates a chain segment and a cooperating latch plate assembly. The latch plate assembly has a chain link receiving slot and a gravity operated keeper whereby the chain may be latched by pushing it against the keeper and into the slot but requires separate manipulation of the keeper in order to remove the chain from the slot.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: March 10, 1981
    Inventor: David A. Miller
  • Patent number: 4247966
    Abstract: An apparatus for straightening damaged automobile frames or bodies utilizing a rigid structural ramp capable of supporting a vehicle. A preferably hydraulic power source capable of imparting alternatively a compressive or a tensile force to the damaged frame or body is adjustably mounted on a wheeled post which slidably travels a continuous track circumventing the ramp. The ramp is provided with improved chain anchoring openings. A chain can be used for a applying tensile force to the frame directly or indirectly to the frame by connecting a chain first to the anchoring opening, then to the damaged frame, and then to the hydraulic power source.Using two wheeled posts on the continuous track, a rotatable, pivotal, cross bar can be attached at its respective end portions to the wheeled posts. With the power source mounted on the cross bar, repairs can be made to the roof, or interior portions of an automobile (see FIG. 10).
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: February 3, 1981
    Inventor: Claude Labbe
  • Patent number: 4243088
    Abstract: Means for improving the traction of wheeled equipment used in the logging industry comprising an improved skidder ring with clevises to which the connecting tag chains are fastened by a pin preferably secured in place by a spot of welding material. When a tag chain breaks and must be replaced, the pin is severed by a torch permitting the remaining two pin parts to be removed from the clevis. The end link of the replacement or repaired tag chain is secured by a new pin placed in the clevis. A spot of welding material is applied to the pin to hold it in place.
    Type: Grant
    Filed: July 26, 1979
    Date of Patent: January 6, 1981
    Inventor: Emilien Labonville
  • Patent number: 4241575
    Abstract: A chain saddle assembly is disclosed which permits a chain used as a sling to be supported at any point between its opposite ends. The supported link is placed in a groove so that the link is lying sideways with one leg of the link above the other. Ledges are provided which engage the two links of the chain adajacent to the link which is being supported. The assembly thus prevents possible slipage of the chain through the assembly while providing proper support without imposing undo stress concentrations on the supported link or the links adjacent to it.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: December 30, 1980
    Assignee: I & I Sling Company, Inc.
    Inventor: Dennis St. Germain
  • Patent number: 4238895
    Abstract: An improved lift arm is pivoted upward by a hydraulic cylinder to lift a plow blade by a chain connected between the lift arm and blade. The lift arm includes an elongated body with a chain receiving member permanently fixed to an end thereof. Engaging a link of the chain is a slot in an upwardly facing concave surface of the chain receiving member. The slot has a width slightly greater than the thickness of a link of the chain so that a link is engaged and restrained. An opening, having a width slightly greater than the width of the link, receives the chain ahead of the link restrained in the slot. Regardless of the relative orientation of the chain and lift arm, the concave surface causes the chain and chain receiving member to remain generally perpendicular.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: December 16, 1980
    Assignee: Meyer Products, Inc.
    Inventor: Vernon L. Hetrick
  • Patent number: 4237951
    Abstract: A tightener for securing tire chains about industrial tires. The tightener includes a pair of block members that are threadably engaged by a draw bolt. The draw bolt includes a tool engaging surface that facilitates attachment of a tool to turn the draw bolt about its central axis and correspondingly move the block members axially toward or away from one another. A pair of non-extensible lengths of chain are connected to each block and extend outwardly to free ends that are adapted for connection to the side rail chain of an industrial tire chain. Therefore, the tightener may be mounted with the length of chain connected to the side rail chain and the blocks and draw bolt substantially centered on the tire axis. The draw bolt may then be rotated to bring the block members axially together, pulling inwardly on the side rail chains to tighten the tire chain about the tire periphery.
    Type: Grant
    Filed: April 19, 1979
    Date of Patent: December 9, 1980
    Inventor: Jay Dirks
  • Patent number: 4230167
    Abstract: A snow chain and bracket combination for mounting to a vehicle wheel. The bracket includes a first wall which extends through the wheel between the wheel rim and spider. Each chain extends radially around the tire and has opposite ends connected to the opposite ends of the bracket by means of spring-biased clips. The bracket extends inwardly from the rim and is mounted by a lug nut onto the wheel spider. The bracket abuttingly engages additional lug nuts to prevent relative motion between the wheel and bracket.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: October 28, 1980
    Inventor: Earl D. Carver
  • Patent number: 4226350
    Abstract: A keyholder adapted for use as an addition to a garment has a body formed from a backing plate with a retainer plate attached at an acute angle to form a V-shaped trough. Key loop openings in the retainer plate have a trapezoidal slot opening at its longer base to the free edge of the retainer plate, and the short base opens to a circular aperture. The backing plate is provided with a cavity or hole positioned to cooperate with the circular aperture in retaining a spherical key loop therebetween. The sphere is relatively large, such as one-quarter inch or more, so that it provides a caming surface that allows removal or insertion of the sphere in the keyholder body with moderate forces.
    Type: Grant
    Filed: October 12, 1978
    Date of Patent: October 7, 1980
    Inventor: Henry Detje
  • Patent number: 4221364
    Abstract: A chain block having an attaching member connected to the load-free end link of a load chain entrained around a load sprocket wheel rotatably supported by and between a pair of lateral plates. The attaching member is pivotally mounted at one end portion thereof between the pair of lateral plates by a pin which extends through the attaching member and the pair of lateral plates. The other end portion of the attaching member at which the latter is connected to the load-free end link of the load chain is formed on both sides thereof with boss-like projections adapted to abut against the peripheries of the pair of lateral plates to thereby increase the strength with which the load-free end link of the load chain is attached to the pair of lateral plates, thereby improving the safety of the chain block.
    Type: Grant
    Filed: August 3, 1979
    Date of Patent: September 9, 1980
    Assignee: Kabushiki Kaisha Toa Kiaki Seisakusho
    Inventor: Yosaku Nishimura
  • Patent number: 4186464
    Abstract: An improvement in the class of chain stopper comprising a framework having a chain track extending through it for receiving the chain and a pawl which is pivotably attached at one of its ends to the framework and comprising two parts pivotably connected to each other in the fashion of a toggle link which remains substantially unbent in its chain-stopping position and is actuated to a bent position when the chain is released; this class of chain stopper also comprises an arm pivotably attached at one of its ends to the other end of the pawl and pivotably attached at its other end to the framework, this arm having a bearing portion resting against, and substantially conforming to, the surface of the chain when the pawl is in its chain stopping position.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: February 5, 1980
    Assignee: Pusnes Mek, Verksted A/S
    Inventor: Harry S. Sandoy
  • Patent number: 4176874
    Abstract: A lifting ring for a chain sling comprises two generally L-shaped lugs, located on opposite sides of the central plane of the ring body. The upright limbs of the lugs extend partly along the respective sides of the ring body and the lower limbs of the lugs extend partly along the lower side of the ring body towards the central plane. Each lug is provided with an opening of such size and configuration that a chain link can pass through the opening, the width of the opening being less than the width of a chain link whereby withdrawal of the link from the opening when the chain is under tension is prevented by the adjacent link at right angles thereto.
    Type: Grant
    Filed: July 6, 1978
    Date of Patent: December 4, 1979
    Assignee: Stas Societe Technique d'Accessoires Specialises
    Inventor: Jean F. Archer
  • Patent number: 4159849
    Abstract: A holding device for a chain is proposed, particularly for a chain associated with a coal cutter and having links located in two mutually transverse planes. The holding device has a chain block having two portions formed with a recess and bounding a slot. The recess is dimensioned for receiving an end portion of one of the chain links which is located in one of the planes, and the slot is dimensioned for receiving the other chain link which is located in the other of the planes. The recess may be U-shaped, and the slot extends in the direction of elongation of the chain block. Supporting portions may be provided for supporting one of the chain links which is located in a horizontal plane. Means may be provided for fastening the horizontal chain link to the supporting portions. Two additional such portions may be provided in the same chain block, spaced from the first two portions in the direction of elongation of the chain block.
    Type: Grant
    Filed: July 29, 1977
    Date of Patent: July 3, 1979
    Assignee: Fa. August Thiele
    Inventor: Friedhelm Rehbein