Chains Patents (Class 59/78)
  • Patent number: 5133179
    Abstract: The repair link is a C-shaped member and a junction member, the junction member having enlarged tongues with narrower roots and the C shaped member is complementary. Welding to hold the junction member in place preferably is caused to adhere to the C-shaped member rather than the junction member.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: July 28, 1992
    Assignee: J. O. Bernt & Associates Limited
    Inventors: Jorgen O. Bernt, Barry C. Forster
  • Patent number: 5107672
    Abstract: A rigid drive assembly is constructed of two interconnected, flexible chain elements.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: April 28, 1992
    Assignee: The Will-Burt Company
    Inventor: Harry E. Featherstone
  • Patent number: 5077965
    Abstract: The present invention provides a conveyor chain for textile processing machines in which a lubricant supply is safeguarded at all times in the event of maximum mechanical stressing. The conveyor chain is connected to a center clip body 1 by a pin 2, the pin 2 being surrounded by a link bushing 11 which has a transverse bore 27 for the lubricant supply of an antifriction bearing 10 surrounding the link bushing by lubricant ducts 23, 25 being defined within the pin 2; and at least one side bar 13 is supported on the link bushing 11. The link bushing 11 is coupled to the side bar 13 in a manner to preclude rotation of the link bushing. Between a roller element 20 and the link bushing 11, an internal ring 19 is provided and staggered axially relative to the transverse bore 27, and the antifriction bearing is bounded in an axial direction by at least one cover plate 15.
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: January 7, 1992
    Assignee: Kolb GmbH & Co.
    Inventor: Karl-Heinz Jedamzik
  • Patent number: 5058645
    Abstract: A stud link for a tire chain is provided. The stud link includes a link body that has at least one attachment opening for further links of the chain. Longitudinal surfaces of the link body form a tire contact surface, and also form a wear surface beyond which at least one profiled element projects. At least a portion of the profiled element extends at an angle to a longitudinal central plane of the stud link.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: October 22, 1991
    Assignee: Eisen- und Drahtwerk Aktiengesellschaft
    Inventor: Anton Muller
  • Patent number: 5042244
    Abstract: One piece, molded, snap-fit roller chain cap of polymer material can be removably affixed to roller chain. The cap includes a pair of legs which, when affixed to a link of the chain, straddle the side plates thereof. Each of the plates and its associated leg have interlock portions. In the preferred form, the legs extend slightly below the bottom surfaces of the plates when the legs and plates are interlocked.
    Type: Grant
    Filed: November 7, 1990
    Date of Patent: August 27, 1991
    Assignee: Drives-Incorporated
    Inventor: Gail G. Worsley
  • Patent number: 4986067
    Abstract: A process for the production of an elongated composite member of circular cross section, comprising producing a hollow metal tube having an inside diameter, inserting in the hollow tube an elongated core of circular cross section of a light-weight, tough and ductile material having an outer diameter substantially smaller than the internal diameter of the tube, and reducing the diameter of the tube until said tube is firmly bonded to the outer surface of the core. Thereafter, the diameter of the tube and core together is reduced. The core is of aluminum and the tube is of copper alloy. The composite thus produced is formed into a jewelry chain and then gold plated.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: January 22, 1991
    Inventor: Gianfranco Caccialupi
  • Patent number: 4951457
    Abstract: A narrow pitch articulated chain wherein the chain links have a narrow pitch and include a concave bearing surface in the bottom thereof in order to travel around a small diameter nose bar and effect an end transfer of small items from a flat top product transport chain. The pitch of the chain links is 0.625 inches or less, and the radius of the bearing surface and nose bar are both 0.5 inches or less and substantially equal to each other.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: August 28, 1990
    Inventor: Douglas O. Deal
  • Patent number: 4947912
    Abstract: In a preferably edge-hardened or case-hardened stud link for tire chains, to increase the link surface a plurality of troughs (10) which are open on only two sides is arranged on the side faces (8, 9) of the ground-facing link part (1). The troughs (10) arranged in the region of the side faces (8, 9) can be supplemented by troughs (13) designed to resemble blind holes, which are arranged in the region of the contact face (11) and are open on only one side and which form chambers for receiving highly abrasive rock grains exerting a wear-inhibiting effect.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: August 14, 1990
    Assignee: RUD-Kettenfabrik Rieger & Dietz GmbH U. Co.
    Inventor: Erhard A. Weidler
  • Patent number: 4941316
    Abstract: The present invention discloses an improved chain assembly and a method for making the same. In general, the method of making a chain assembly in accordance with the present invention, comprises forming a plurality of links having a preselected shape and placement of apertures therein. A plurality of wire blanks are formed having an outer diameter to permit insertion into the apertures of the links. Such link is retained in a fixed position and a wire blank is inserted into each aperture of the link. On one end of each wire blank, a head is formed having a diameter larger than the aperture into which the wire blank is inserted. A mating link is placed into engagement with each link containing wire blanks with the end of each blank inserted in one aperture of the mating link in a manner to form a chain assembly. On the other end of each wire blank, a head is formed to complete interlocking of the links and blanks in forming the chain assembly.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: July 17, 1990
    Inventor: Stephen K. Bechtold
  • Patent number: 4941315
    Abstract: A sidebar is provided for a trenching chain. The sidebar has an inner edge which slides along a boom of a trenching machine, when the trenching chain is in use. The sidebar is induction hardened through a portion thereof extending from the inner edge, for increased resistance to wear due to friction.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: July 17, 1990
    Assignee: Rexnord Corporation
    Inventor: John H. Thuerman
  • Patent number: 4914903
    Abstract: A shackle of cast metal defines a threaded bore for a cast pin. The shackle is specially shaped to define a circular locus for a joined link whether said link contacts shackle body, ear or pin.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: April 10, 1990
    Assignee: J. O. Bernt & Associates Limited
    Inventors: Jorgen O. Bernt, Barry C. Forster
  • Patent number: 4893464
    Abstract: An offset sidebar chain for use in a machine including pairs of offset sidebars having heights perpendicular to the direction of chain travel, when the chain is in use, at least one pair of offset sidebars of the chain having an extended height, and each including a first portion having opposite ends, a forward end adapted to be connected by a chain pin to a preceding pair of sidebars, and a rearward end adapted to be connected by another chain pin to a trailing pair of sidebars and the pair of extended height sidebars including an extended height portion having structure for supporting a tool.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: January 16, 1990
    Assignee: Rexnord Corporation
    Inventor: John H. Thuerman
  • Patent number: 4885907
    Abstract: The invention is called a "Chainbar" because it may be quickly and easily adjusted to have the characteristics of a flexible chain and/or that of a rigid bar; and may be easily folded into any size rectangular solid of equal volume. It consists of a series of interconnected links, which are flexible like a chain, but have means for restricting the movement between the links, to form a rigid bar. If the Chainbar is in the form of a flexible chain, and is passed through a tube which may be less than one link long, and has proper activating tabs, the movement between links will be sequentially restricted to form a rigid bar, adjustable in length in one link increments. The Chainbar has ubiquitous uses. It may anchored at one end and have a device attached to the other end, that may be extended out and away from the anchored end, such as a mirror, microphone, light source, etc. It may be used as folding handles or legs in folding, compact items such as tables, tripods, luggage carriers, etc.
    Type: Grant
    Filed: November 25, 1988
    Date of Patent: December 12, 1989
    Inventor: Sofia Pappanikolaou
  • Patent number: 4872306
    Abstract: A chain mesh for easy installation comprises a plurality of running lengths of chain. In one embodiment a plurality of vertical running lengths are positioned in parallel spaced relationship. A plurality of substantially horizontal running lengths are then positioned closely adjacent the plurality of vertical running lengths, and then the points of crossing are interconnected by connecting links therebetween. Each connecting link is normally open, and then closed after being installed between a respective vertical link and a close horizontal link. The connecting links permit a flexibility between the vertical and the horizontal chains, but substantially retain the cross parallel chains in such relationship. This crossed relationship may have the respective plurality of chains substantially perpendicular to each other, or they may be at an oblique angle to each other.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: October 10, 1989
    Assignee: Cooper Industries, Inc.
    Inventors: Gerald H. Ensminger, Andrzej Kalazny
  • Patent number: 4869061
    Abstract: A chain mesh for easy installation comprises a plurality of running lengths of chain. In one embodiment a plurality of vertical running lengths are positioned in parallel spaced relationship. A plurality of substantially horizontal running lengths are then positioned closely adjacent the plurality of vertical running lengths, and then the points of crossing are interconnected by connecting links therebetween. Each connecting link is normally open, and then closed after being installed between a respective vertical link and a close horizontal link. The connecting links permit a flexibility between the vertical and the horizontal chains, but substantially retain the cross parallel chains in such relationship. This crossed relationship may have the respective plurality of chains substantially perpendicular to each other, or they may be at an oblique angle to each other.
    Type: Grant
    Filed: July 24, 1987
    Date of Patent: September 26, 1989
    Assignee: Cooper Industries, Inc.
    Inventors: Gerald H. Ensminger, Andrzej Kalazny
  • Patent number: 4850542
    Abstract: A winding apparatus for winding a magnetic element through a form, the apparatus having at least one chain which has a plurality of magnetic carrier units disposed about the form for loading the coil of the element through the form and, after loading, for winding the element from the loading coil about the form under tension to tightly wind a final coil. Each carrier unit includes a device for generating a magnetic force to magnetically hold the element and to release portions of the element when tension on the element between the outer periphery of the final coil and the advancing point of separation of the element from the inner periphery of the loading coil exceeds the magnetic force exerted by the carrier units. The winding apparatus also includes a device for driving the chain during loading and winding, and structure for defining the path of the chain during loading and winding.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: July 25, 1989
    Assignee: Isoreg Corporation
    Inventor: Emil B. Rechsteiner
  • Patent number: 4813225
    Abstract: The chain for pressing a plurality of annular segments against a pipeline includes a plurality of links which are interconnected by pivot pins. At least some of the pivot pins are provided with eccentrics which are disposed within the inner links so that upon turning of a pivot pin using a suitable tool, the tension on the chain can be adjusted. Nuts are rigidly secured at the ends of the pivot pins carrying the eccentrics to facilitate turning of these pivot pins.
    Type: Grant
    Filed: February 13, 1987
    Date of Patent: March 21, 1989
    Assignee: Sulzer Brothers Limited
    Inventor: Hans Fricker
  • 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: 4796420
    Abstract: A fusible link has a tubular housing having a recess in one side thereof in communication with a bore at one end of which one end of a thermally sensitive strut is seated. A yoke has at one end thereof an arm against which the opposite end of the strut seats. The strut resists relative movement of the housing and the yoke until such time as the strut collapses whereupon the arm is cammed out of the recess enabling separation of the housing and the yoke.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: January 10, 1989
    Assignee: Van Wormer Management Corporation
    Inventor: Carmen Gueli
  • Patent number: 4779411
    Abstract: Non-metallic rigging chain formed with a plurality of linked flexible loops. Each loop has a core which consists of a continuous strand of non-metallic materially coiled upon itself. The coiled core material is sheathed within a woven outer fabric. Except for the two terminal loops of each chain, one loop is formed by coiling a continous strand of core material in linked relation within a pair of completed loops. The length of each chain is determined by the diameter of its loops and the number of loops linked together.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: October 25, 1988
    Assignee: Link Enterprises Corporation
    Inventor: Steven E. Kendall
  • Patent number: 4750325
    Abstract: A chain link having a pair of curved extremities and being generally in the shape of an elongated loop. The loop defines two sides which converge towards the middle of the link where the two sides are rigidly jointed together, as by a weld, thereby forming a pair of interior spaces progressively narrowing towards the middle. Such link is adapted for use in alternation with pin links in a chain designed to remove waste material in a livestock enclosure. A method of making the link is further disclosed.
    Type: Grant
    Filed: April 9, 1987
    Date of Patent: June 14, 1988
    Inventor: Fernand Messier
  • Patent number: 4747261
    Abstract: A load transmitting chain (1) comprises a series of links each formed by a number of link plates (2) arranged side by side and meshing with the link plates of the adjacent link to which they are pivotally connected by link pins (4). The chain is intended for use in transmitting force from a hydraulic cylinder having a piston rod, for example in a fork-lift truck. To avoid damage to the piston rod by contact of the links (2), which are of steel, with it, the chain is provided with a row of additional protective link plates (5) which are sandwiched between the link plates (2) and have projecting portions (11). The protective link plates (5) are made of plastics material and the projecting portions (11) act as buffers so that they come into contact with the piston rod without causing damage and prevent direct contact between the steel link plates (2) and the piston rod.
    Type: Grant
    Filed: September 10, 1986
    Date of Patent: May 31, 1988
    Assignee: Rexnord Kette GmbH & Co KG
    Inventor: Ludger Frenker-Hackfort
  • Patent number: 4744211
    Abstract: A detachable chain composed of chain links is broadly used as a conveyor chain with attachments for various kinds of articles to be conveyed, or as a power transmitting chain. The conventional chain of this type, however, could convey only light load when used as a conveyor chain and could run only at a low speed when used as a power transmitting chain. This invention provides a detachable chain improved both in the rupture strength and service life, as well as a method of producing the same.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: May 17, 1988
    Assignee: Hitachi Metals, Ltd.
    Inventor: Tetuo Abe
  • Patent number: 4724929
    Abstract: Disclosed is a compensating cable adapted to be used in combination with an elevator cab, counterweight, hoist rope and traveling cable. The compensating cable is composed of a sheath, at least one elongated strength member such as a link chain or stranded wire rope, made from metal or other materials of high tensile strength disposed in the sheath and the volume of the sheath not otherwise occupied by the strength member substantially occupied by a mixture of metal particles and plastic.
    Type: Grant
    Filed: May 14, 1985
    Date of Patent: February 16, 1988
    Assignee: Siecor Corporation
    Inventors: John D. Coleman, Donald L. Obst
  • Patent number: 4716989
    Abstract: Disclosed is a compensating cable adapted to be used in combination with an elevator cab, counterweight, hoist rope and traveling cable. The compensating cable is composed of a sheath, at least one elongated strength member such as a link chain or stranded wire rope, made from metal or other materials of high tensile strength disposed in the sheath and the volume of the sheath not otherwise occupied by the strength member substantially occupied by a mixture of metal particles and plastic.
    Type: Grant
    Filed: August 4, 1982
    Date of Patent: January 5, 1988
    Assignee: Siecor Corporation
    Inventors: John D. Coleman, Donald L. Obst
  • Patent number: 4706451
    Abstract: A chain lock for round chain links, particularly for use in mining, consisting of preferably congruent part links, a center portion and a locking pin. The center portion is supported on cylindrical surfaces which form the base of a recess. The recess is provided in either inner side of the inner shank of the part links and undercuts both outer sides of the shank attached to it. The center piece has cylindrical supporting surfaces on opposite sides, and a pair of flat surfaces which are pierced by the cylindrical-surfaced supports. The ends of the center piece are supported in the receiver of the shanks when the center piece is inserted. The pin pierces the center piece at an angle and protrudes with its ends above and below the surfaces of the center piece to prohibit it from being rotated.
    Type: Grant
    Filed: March 13, 1986
    Date of Patent: November 17, 1987
    Assignee: Becker-Pronte GmbH
    Inventors: Wilfried Stromberg, Theo Kuhnigk
  • Patent number: 4673015
    Abstract: A chain net comprises a plurality of warp strands (1.1) with mutually equal links (1.2) which at intersections lock round links (1.5) of weft strands (1.4) having mutually equal links. The links of the warp strands have dimensions such that they first allow the insertion of weft strands and, after plastic or elastic deformation, lock links of the weft strands. The plastic deformation is provided by elongating the warp strands. The elastic deformation is provided by the warp strand links being first expanded to allow the insertion of weft strands, after which the warp links are elastically re-deformed for locking round weft links.
    Type: Grant
    Filed: July 12, 1984
    Date of Patent: June 16, 1987
    Inventor: Olof I. Andreasson
  • Patent number: 4664229
    Abstract: An elevator compensating cable which has an elongated plastic tube shaped member which delimits a predetermined volume. Disposed within the predetermined volume are: (a) at least one elongated member; (b) an elongated means made from a mixture of metal particles of plastic; and (c) a plurality of elongated fibers adapted to move relative to one another, the strength member, and the elongated plastic tube shaped member, having a coefficient of elongation of not more than 30% and a coefficient of friction relative to all surrounding materials of not less than 0.3.
    Type: Grant
    Filed: June 28, 1985
    Date of Patent: May 12, 1987
    Assignee: Siecor Corporation
    Inventor: Donald L. Obst
  • Patent number: 4649977
    Abstract: In a tire chain, at least one junction point has a horizontal link having the form of a shackle with a main part and with outward-directed ends adjoining this. The hardness of the main part is greater than the hardness of the ends facing one another, these being joined to one another by means of a connecting part which is mushroom-shaped. The connecting part in turn has a hardened head and a hardened foot which are connected to one another via a soft shank.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: March 17, 1987
    Assignee: RUD-Kettenfabrik Rieger & Dietz GmbH u. Co.
    Inventor: Erhard A. Weidler
  • Patent number: 4627232
    Abstract: A chain comprises interconnected links with each link comprising opposed C-shaped ends joined by joining limb portions. Each C-shaped end includes a central crown with shoulders on either side of the crown, and by the present invention the section modulus about an axis perpendicular to the plane of the link of a cross-section at a shoulder is greater than the corresponding section modulus of a cross-section at the crown, and preferably additionally said section modulus of the section at the shoulder is greater than a corresponding section modulus of a cross-section at the associated joining limb portion.
    Type: Grant
    Filed: January 3, 1985
    Date of Patent: December 9, 1986
    Assignee: Brupat Limited
    Inventor: Peter Bruce
  • Patent number: 4615171
    Abstract: Bicycle Chain is made of alternating bushing links and pin links. The bushing links have parallel bushings held in interference fit in bushing plates and extended axially beyond the bushing plates, solid metal rolls with a lubricating plating are held loosely on the bushings, and loosely between the bushing plates. The bushings extend axially outward beyond the bushing plates for substantial distances. Pins extend through the bushings and are fixed in pin plates to form pin links which alternate with the bushing links. The pin plates are held outward from the bushing plates for a substantial amount by the axial bushing extensions to prevent dirt build up. The pin plates, bushing plates and bushings are plated with an anti-corrosion plating. The pins and rolls are plated with a porous metal plating with solid polymeric lubricant held within pores of the plating for lubricating the pin-bushing interior interface and for lubricating the roll-bushing and roll-bushing plate interfaces.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: October 7, 1986
    Assignee: Incom International Inc.
    Inventor: Robert G. Burk
  • Patent number: 4505465
    Abstract: A wood splitter's aid tool comprising an elongated, elastically stretchable, flexible member comprising a length of metal chain in series with a length of elastic cord, with the cord and a portion of the length of chain protectively surrounded by a preferably precurved length of synthetic hose and having, at one end of the member, a hook adapted to engage a selected link of the chain in order to encircle a block of wood to be split with the member under tension. The encircling band allows the block of wood to be split by an axe and holds it in assembled condition against pieces flying off and against the necessity of a person risking one hand to hold a small remaining piece in place as the other hand wields an axe.
    Type: Grant
    Filed: April 7, 1983
    Date of Patent: March 19, 1985
    Inventor: Frank R. McCrary
  • Patent number: 4497169
    Abstract: An elongate main link 2 for a chain or cable sling shaped as a pair of generally semi-circular crown portions 4 connected by parallel-extending side portions 6 has the crown portions 4 formed with inner and outer circumferentially extending flanges 8 and 10 connected by webs 12 and the side portions 6 formed with inner flanges 14 joined to outwardly extending webs 16.
    Type: Grant
    Filed: May 19, 1983
    Date of Patent: February 5, 1985
    Assignee: Parsons Controls Limited
    Inventor: Michael J. Millington
  • Patent number: 4467598
    Abstract: An energy absorbing chain which can be used as a "one shot" safety chain to absorb sudden impacts or short term tensional forces is disclosed. According to the invention, the safety chain is made of a metal having high ductility such that the chain will tend to deform, stretch, and/or deflect rather than break. According to a preferred embodiment, the chain may include links such as links (36), (38), (40) and (42) each of which includes a twist of 90.degree. to increase the amount of available deformation. In the preferred embodiment, link (36) and (40) include a twist in a first direction such as a clockwise direction whereas links (38) and (42) which alternate with links (36) and (40) include a 90.degree. twist in the opposite or counterclockwise direction. Thus upon receiving or being subjected to such tensional forces, the links can deform as shown by links (58), (60) and (62) as they absorb energy for a short period of time.
    Type: Grant
    Filed: April 28, 1981
    Date of Patent: August 28, 1984
    Inventor: William M. Wells
  • Patent number: 4415625
    Abstract: A spiral linkage belt comprising a multiplicity of intermeshing plastic helices, with the windings of each helix penetrating into the windings of the adjacent helix so that the helices form passageways, and pintle wires extending through each passageway to connect the helices, the spiral linkage belt further including a fabric of interwoven structural warp wires and weft wires connected to the helices.
    Type: Grant
    Filed: November 19, 1982
    Date of Patent: November 15, 1983
    Assignee: Hermann Wangner GmbH & Co. KG
    Inventor: Georg Borel
  • Patent number: 4411131
    Abstract: A chain link plate including a pair of enlarged end parts joined by an intermediate constricted part. Each end part has an opening therethrough. The link plate is symmetrical about a first axis which extends longitudinally of the link plate and passes through the centers of the openings. The link plate is also symmetrical about a second axis which extends perpendicular to the first axis and perpendicular to the axes of the openings. Each end part has a convex curved exterior edge surface generated about a first radius which is centered on the first axis. The intermediate constricted part has upper and lower concave curved exterior edge surfaces each defined about a second radius which is generated about a center point located in sidewardly spaced relationship from the link plate. The second radius is equal to the first radius.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: October 25, 1983
    Assignee: Tsubakimoto Chain Co.
    Inventors: Tatsuo Ohnishi, Takeshi Uemura, Teruo Nakajima
  • Patent number: 4408645
    Abstract: Tire protective or traction chain comprising a network of wearing plates 14 substantially perpendicular to the surface of a tire and connectors 12 substantially parallel to the surface of the tire interconnecting the wearing plates. Each wearing plate on the tread portion of tire comprises an assembly of multiple plates 16 that are relatively thin and that together form a wearing plate assembly of the required thickness. Alternate plates of an assembly may be of different heights or have sloping ground engaging edges arranged opposite to one another for increased traction.
    Type: Grant
    Filed: May 24, 1982
    Date of Patent: October 11, 1983
    Inventor: Hans O. Dohmeier
  • Patent number: 4397145
    Abstract: A universal or ball pivot-link chain arrangement has chain link elements subdivided in an axial plane, each chain link element has a ball pivot body provided with an undercut portion of substantially hemispherical shape. A ball socket enclosing the ball pivot body of an adjacent link has a ring connection at the region of said undercut portion of the adjacent link. Each ring connection has ring-shaped braces engaging countersurfaces of the ball socket. These braces are effective not only in the radial direction, but are arranged to act as blocking devices against any relative displacement of the two halves of the chain link elements in the axial direction.
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: August 9, 1983
    Assignee: Ferag AG
    Inventor: Walter Reist
  • Patent number: 4349101
    Abstract: A conveyor of the endless chain type passing around two or more sprockets provided with means for compensating for the chordal action which ordinarily occurs as a chain passes around its associated sprocket. The chain is composed of links having overlapping portions pivoted together by pins which have eccentrics associated therewith that have sprocket-engaging surfaces. As the links move onto and off the sprockets, these eccentrics are controlled to rock relative to the pivot pins to vary the pitch of the successive links, which serve to keep the runs of the chain moving at a constant speed.
    Type: Grant
    Filed: December 24, 1980
    Date of Patent: September 14, 1982
    Assignee: The Eldred Company
    Inventors: John W. Eldred, James B. Legg, James A. Earley
  • Patent number: 4263779
    Abstract: A T-headed pin for use in rivetless chain, generally of the trolley conveyor type, is disclosed. The pin can entirely replace the conventional forged pin of any ordinary size and has superior design matching abilities. It is unique in that it is constructed entirely from a flat piece of sheet metal. Rectangular metal blanks with paired oppositely projecting tabs are provided. The blank is first curled to form the body of the pin with the tabs projecting endwise therefrom. In automated manufacture of chain of the type mentioned in selected lengths, the links may be readily assembled with curled pins having tabs projecting axially from both ends. The tabs may then be bent as required to complete the chain length. Alternatively, the tabs at one end only may be bent and lengths of chain may be readily assembled by inserting the other end of each pin into place and then bending the tabs at said other end.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: April 28, 1981
    Assignee: Rexnord Inc.
    Inventor: Victor D. Petershack
  • Patent number: 4177635
    Abstract: A swivel link for a dual chain conveyor which permits predetermined sections of a pair of endless chains to be rotated perpendicular to the longitudinal direction of movement of the chains. The dual chain is used as a conveyor for a load and the swivel link allows a work piece transported on the dual chain conveyor to be moved at a work station.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: December 11, 1979
    Inventor: Frank Klimezky
  • Patent number: 4134255
    Abstract: A chain particularly useful for draglines in various type strip mining operations is disclosed. The chain is made up of individual, separately assembled links of generally a U-shape having spaced pin lugs at one end. The lugs have aligned pin eyes for holding a pin between them, which is received generally flush with the outside surfaces of the lugs. To prevent pin rotation and to prevent oblong wear in the pin eyes, the pin and the eyes have a flat surface on the side toward the open end of the U-shaped link. With the pin installed in the eyes, a roll pin is press fit through one lug and through that end of the pin to retain the link pin in place. Openings in the lug are oblong shaped, so that some forward and backward movement of the link pin is permitted and the roll pin is never put in a shear situation. The link units are assembled at 90.degree. to one another, with a pin of one link passing through the next link.
    Type: Grant
    Filed: November 22, 1977
    Date of Patent: January 16, 1979
    Assignee: Columbia Steel Casting Co., Inc.
    Inventors: Robert T. McBain, Bruce C. Johnson
  • Patent number: 4129285
    Abstract: A chain for binding logs on a transport platform may be fabricated from a plurality of sequentially connected generally planar links, each link having laterally directed, log-penetrating extensions mounted to its external sides and having an elongated member with two log-penetrating ends rigidly mounted between the sides of the link normal to the plane of the link. A combination of the chain with an over-center binder attached to said chain and having a chain-engageable first end is also disclosed.
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: December 12, 1978
    Inventor: John P. Graham
  • Patent number: 4118995
    Abstract: Integrated tie strap and rivet assemblies for saw chains are made by the steps of rough cutting, coning, coining and trimming a length of elongate bar. The integrated tie strap and rivet assemblies thus formed replace the separate tie straps, rivets and concentric shoulders heretofore used in saw chains.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: October 10, 1978
    Assignee: Omark Industries, Inc.
    Inventors: Donald D. Lanz, Ronald E. Hencye
  • Patent number: 4106542
    Abstract: A tire chain comprising tread links formed with a perforation and connectors that are loops threaded through the perforations in three or more tread links interconnecting the tread links to form a network of closed figures. The connectors are loops of a carbon steel rod with the ends of the loops lapping each other and being welded together along the length of their adjacent surfaces. The tread links and connectors are of different carbon steels whereby after heat treating each is hardened throughout its thickness with the tread links having a surface hardness in the range 46 to 54 Rockwell C and the connectors having a core hardness in the range 15 to 35 Rockwell C.
    Type: Grant
    Filed: February 4, 1977
    Date of Patent: August 15, 1978
    Assignee: Dome Inventions (Proprietary) Limited
    Inventor: Hans Otto Dohmeier
  • Patent number: 4060978
    Abstract: A chain particularly useful for draglines in various type strip mining operations is disclosed. The chain is made up of individual, separately assembled links of generally a U-shape having spaced pin lugs at one end. The lugs have aligned pin eyes for holding a pin between them, which is received generally flush with the outside surfaces of the lugs. To prevent pin rotation and to prevent oblong wear in the pin eyes, the pin and the eyes have a flat surface on the side toward the open end of the U-shaped link. With the pin installed in the eyes, a keeper is welded onto the flat surface of the pin, extending between the two lugs to retain the pin in place. The units are assembled at 90.degree. to one another, with a pin of one link passing through the next link. The body of the link may be of a more wear-resistant material than the pin so that the easily replaceable pin wears out first.
    Type: Grant
    Filed: February 24, 1977
    Date of Patent: December 6, 1977
    Assignee: Columbia Steel Casting Co. Inc.
    Inventors: Robert T. McBain, Bruce C. Johnson
  • Patent number: 4034556
    Abstract: A chain link, which is asymmetric about its longitudinal axis, one longitudinal side of the link being convex, the other being concave, or a plurality of such links alternating with common type links, is used for twisting the chain into predetermined synchronization with the pockets and teeth (whelps) of a chain sheave (cable lifter, wildcat), particularly as applied to a chain and a rope interconnected by a coupling link larger than a common link.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: July 12, 1977
    Assignee: A/S Pusnes Mekaniske Verksted
    Inventor: Simon Riber
  • Patent number: 4002509
    Abstract: The invention relates to a process for the manufacture of a chain having an ultimate tensile strength of at least 90 kg/mm.sup.2 and an impact strength at .+-. 0.degree. C of at least 2.8 kgm starting from a steel ingot containing C, Si, Mn, Cr, Mo, N, Al, Nb (Cb), and Fe in certain amounts, said ingot being hot rolled to a rod of a dimension suitable for use in a chain, cut into pieces of adjusted length and after resistance heating to 700.degree.-900.degree. C said pieces being bent and flash-butt welded to connected links of a chain, said chain being then normalized by heating to a temperature of 700.degree.-900.degree. C and then cooled in air. The invention also covers chains prepared by the process.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: January 11, 1977
    Assignee: Stora Kopparbergs Bergslags Aktiebolag
    Inventors: Barbro Marie Rohlin, Sten Lennart Bergh, Gustav Nils Herman Westerberg
  • Patent number: RE33339
    Abstract: A chain for supporting energy conveying means, especially power lines and hoses, and a chain link therefor, according to which the chain links are of H-shape having two oppositely located laterally elastically yieldable arms interconnected by a transverse wall while two oppositely located arm sections of each link are provided with holes and the other two oppositely located arm sections of the same link are provided with studs having a diameter corresponding to a slide fit in said holes, the arrangement being such that the studs of one chain link pivotally engage the holes of the next following chain link.
    Type: Grant
    Filed: May 27, 1980
    Date of Patent: September 18, 1990
    Assignee: Kabelschlepp Gesellschaft mit beschrankter Haftung
    Inventors: Klaus Heidrich, Alfred Krewitt, Kurt Loos, Fritz Ipithan
  • Patent number: D322230
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: December 10, 1991
    Inventor: Martha A. Hawkins