Links Patents (Class 59/84)
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Patent number: 4815271Abstract: A transmission or conveyor chain composed of a plurality of interconnected identical links which are attachable and detachable without need for pivot pins or other separate connecting hardware. Each link is preferably molded as a unitary structure of plastic material.Type: GrantFiled: May 1, 1986Date of Patent: March 28, 1989Assignee: The Laitram CorporationInventor: James M. Lapeyre
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Patent number: 4815270Abstract: A transmission or conveyor chain composed of a plurality of interconnected identical links which are attachable and detachable without need for pivot pins or other separate connecting hardware. Each link is preferably molded as a unitary structure of plastic material.Type: GrantFiled: May 1, 1986Date of Patent: March 28, 1989Inventor: James M. Lapeyre
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Patent number: 4813225Abstract: 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: GrantFiled: February 13, 1987Date of Patent: March 21, 1989Assignee: Sulzer Brothers LimitedInventor: Hans Fricker
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Patent number: 4809496Abstract: 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: GrantFiled: July 6, 1987Date of Patent: March 7, 1989Inventor: Ragnar T. Boasson
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Patent number: 4799522Abstract: The present invention relates to a snow chain for vehicle wheels, whereby the snow chain comprises two chain members adapted to extend along the peripheral tread surface of the vehicle wheel when the snow chain is mounted on said wheel. The snow chain comprises tie bars connecting the chain members to each other and adapted to extend transversely to the tread surface when the snow chain is mounted on the vehicle wheel. The snow chain preferably is mounted on arms which are foldable relative to each other and retractable to a position adjacent an end side of the vehicle wheel by means of a retraction device.Type: GrantFiled: December 4, 1986Date of Patent: January 24, 1989Assignee: Autotyp S.A.Inventor: Bengt E. Ilon
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Patent number: 4779411Abstract: 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: GrantFiled: December 29, 1986Date of Patent: October 25, 1988Assignee: Link Enterprises CorporationInventor: Steven E. Kendall
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Patent number: 4757681Abstract: This invention relates to a chain link plate which is constructed by a high tensile strength fiber which is wound around between two pivot points and which is fixed to each other by adhesive material. The link plate is improved in strength and decreased in weight.Type: GrantFiled: June 18, 1987Date of Patent: July 19, 1988Assignee: Tsubakimoto Chain Co.Inventors: Kazumasa Matsuno, Takashi Tsujimoto, Takerou Nakagawa, Yasumasa Tubakimoto, Makoto Kanehira
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Patent number: 4750325Abstract: 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: GrantFiled: April 9, 1987Date of Patent: June 14, 1988Inventor: Fernand Messier
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Patent number: 4747261Abstract: 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: GrantFiled: September 10, 1986Date of Patent: May 31, 1988Assignee: Rexnord Kette GmbH & Co KGInventor: Ludger Frenker-Hackfort
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Patent number: 4724669Abstract: A conveyor or chain having a tubular filament-wound cylindrical element used as the pins interconnecting the link plates and/or as rollers or bushings in the chain assembly. The element is formed from a length of tubular material which is wound on a mandrel having an outside diameter equal to the inside diameter of the tubular element. The filament of the winding is a long aramid fiber which is integrated in the tubular material by an adhesive agent.Type: GrantFiled: April 30, 1986Date of Patent: February 16, 1988Assignee: Tsubakimoto Chain Co.Inventors: Makoto Kanehira, Takashi Koizumi, Takerou Nakagawa, Kazumasa Matsuno, Yasumasa Tsubakimoto, Fumio Ochiai, Takashi Tsujimoto
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Patent number: 4682467Abstract: A method for producing oriented, one-way links from a stock chain having first and second rounded ends and parallel spaced straight sides. The method comprises: moving the chain to a first forming station; forming protuberances in each straight side adjacent the first end of at least a single first link at the first station, the protuberances extending laterally outwardly from the at least on first link; moving the chain to a second forming station; rotating the chain; forming protuberlances one each straight side adjacent the first end of at least a single second link orthogonal to the first link at the second station, the protuberances extending laterally outwardly from the at least one second link; and repeating the above step until all links of the chain have protuberances formed therein.Type: GrantFiled: February 13, 1985Date of Patent: July 28, 1987Assignee: Cooper Industries, Inc.Inventors: Ronald G. Waltemyer, Royce L. Brown
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Patent number: 4671055Abstract: A bracelet for the jewelry and watch making industry, includes rectangular elements connected in a flexible manner by oval links to form several parallel rows adjacent each other. The elements of adjacent rows are also connected with each other by oval links. Each element includes an upper plate and a bottom plate having cutouts that receive the free ends of pillars protruding from the upper plate. The links are of a sufficient dimension to embrace one pillar each of adjacent elements with sufficient play in the longitudinal and transverse direction of the plate, a vertical play being assured by the height of an abutment that keeps the upper plate and the bottom plate at an appropriate distance from each other.Type: GrantFiled: October 4, 1985Date of Patent: June 9, 1987Inventors: Pierre Tschanz, Jean-Pierre Hagmann
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Patent number: 4660611Abstract: An improved passenger car tire chain employing heat treated medium carbon steel is disclosed. The improved tire chain is approximately twice as durable as that presently furnished to meet NACM-5179(TC) for Type PL chains when AISI 1026 or 1029 carbon steel is employed at least for links of a cross chain meeting the road surface. The cross chain links are closed by welding prepared abutting link ends which have been previously beveled. After being welded closed, the cross chain links are case hardened, quenched, tempered and air cooled. The improved tire chain is then assembled in a conventional manner to include a pair of side members, fastening means to secure a end of each side member to the other end, and a plurality of cross chains extending between the sidewall members at preselected intervals.Type: GrantFiled: July 31, 1985Date of Patent: April 28, 1987Assignee: Cooper IndustriesInventors: Glenn E. Gockley, Michael D. Shaffer
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Patent number: 4649977Abstract: 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: GrantFiled: March 13, 1985Date of Patent: March 17, 1987Assignee: RUD-Kettenfabrik Rieger & Dietz GmbH u. Co.Inventor: Erhard A. Weidler
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Patent number: 4635438Abstract: A self-locking link includes two identical link elements which are adapted for connection to two chain links and for mutual engagement with each other. Each link element is generally L-shaped and includes a head portion and a body having an aperture therein. Each body aperture includes an enlarged portion as well as a narrower, elongated portion aligned with a straight line extending between the two chain links to be coupled. The enlarged portion of each aperture is adapted to receive the head portion of the other link element and includes a V-shaped notch therein extending along the aforementioned straight line between the two coupled chain links. Application of a work force along the thus connected link elements of the generally rectangular shaped self-locking link results in the displacement of the head portion of each link element into the elongated portion of the aperture of the other link element.Type: GrantFiled: March 1, 1985Date of Patent: January 13, 1987Inventor: Robert B. Rottinghaus
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Patent number: 4627232Abstract: 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: GrantFiled: January 3, 1985Date of Patent: December 9, 1986Assignee: Brupat LimitedInventor: Peter Bruce
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Patent number: 4578941Abstract: An overload detection and safety arrangement for a load carrying link chain, including a fuse link having link plates connected by a fuse bar of a tensile strength less than the tensile strength of the remainder of the load carrying chain, the fuse link being laced into the remainder of the chain. The fuse bar is designed to break under predetermined overload conditions, but is positioned and arranged to carry normal tensile loads on the device. A safety link, offset from but substantially parallel to the line of tension through the fuse bar, connects the link plates. The safety link has a tensile strength greater than the tensile strength of the fuse bar and at least substantially equal to the tensile strength of the remainder of the chain, the safety link holding the load when the fuse bar breaks due to overload conditions.Type: GrantFiled: August 27, 1984Date of Patent: April 1, 1986Assignee: Emerson Electric Co.Inventor: Roger P. Butterfield
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Patent number: 4571934Abstract: In a chain with chain links of round material, the chain links have, in the region of their contact points, supporting arcs (7,8) with a supporting arc angle .alpha. of 180.degree. and a radius of curvature R.sub.s of 0.5 to 0.52 d, d being the diameter of the round material. On the side of the unwelded leg (3) of the chain link, the supporting arcs (7,8) are connected by a boundary line (9) of the clear inner space (6) of the chain link, which boundary line has an arcuate indentation (11), while the supporting arcs on the side of the welded leg (4) of the chain link are connected by a substantially straight boundary line. The greatest inner width b.sub.1max of the chain link is at most equal to 1.15 times the diameter d of the round material.Type: GrantFiled: January 26, 1983Date of Patent: February 25, 1986Assignee: RUD-Kettenfabrik Rieger & Dietz GmbH u. Co.Inventors: Werner Rieger, Hans H. Dalferth, Franz Eberhardt
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Patent number: 4517913Abstract: A semi-submersible drilling rig having a plurality of chain lockers, a plurality of anchor windlass assemblies and a plurality of fairlead assemblies, a plurality of lengths of chain each having a multiplicity of interconnected links configured to move from a chain locker in cooperative relation through an associated anchor windless assembly and an associated fairlead assembly and an anchor for each length of chain connected to the end of the associated length of chain outboard of the associated fairlead assembly so as to engage with the water bottom. Each length of chain has at least one frangible link normally disposed within the associated chain locker inboard of the associated anchor windlass and fairlead assemblies of a different construction with respect to the remaining links of the associated length of chain.Type: GrantFiled: February 3, 1984Date of Patent: May 21, 1985Assignee: Baldt IncorporatedInventors: Rocco D. Albertini, Thomas V. Grzeczkowski
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Patent number: 4510032Abstract: A cathodically protected, studded chain link of theta configuration is provided with at least one anode member (13) provided with a connector (21) for fastening it to the stud (12) of the link to facilitate subsequent renewal of the anode member.Type: GrantFiled: August 6, 1984Date of Patent: April 9, 1985Inventor: David A. Timmington
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Patent number: 4498284Abstract: An elliptical chain link having a "D" shaped cross sectional configuration along the longitudinal sides of the ellipse is shown and described. In addition there is a unique relationship between the cross sectional areas and configurations of the ends and sides of the link shown and described.Type: GrantFiled: May 25, 1982Date of Patent: February 12, 1985Assignee: E.V. Camp Steel Works, Inc.Inventor: Gordon E. Gearhart
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Patent number: 4497169Abstract: 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: GrantFiled: May 19, 1983Date of Patent: February 5, 1985Assignee: Parsons Controls LimitedInventor: Michael J. Millington
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Patent number: 4490970Abstract: A removable, polymeric conveyor link and conveyor utilizing such a link are disclosed. The link is essentially an elongated body of tough, hard slightly flexible elastomer with at least a pair of spaced, parallel, cylindrical cavities in which are disposed rod locking devices. The conveyor is constructed of metal rods, generally round in cross-section, wherein at least a pair of spaced metal rods are held in position by flexible elastomer spacers (fixed links) near each end whereby the end rods protrude through such spacers and then are joined by the removable elastomer links having rod locking sleeves.Type: GrantFiled: July 24, 1981Date of Patent: January 1, 1985Assignee: Superior Chain, Inc.Inventor: Robert B. Curl
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Patent number: 4487013Abstract: A chain link, comprising a rod of substantially circular cross-section formed into a generally Omega shape. The link includes a transverse bight portion, a pair of side portions offset below the bight portion, a pair of curved leg portions, and a pair of foot portions splaying transversely outward from the ends of the leg portions.Type: GrantFiled: February 22, 1983Date of Patent: December 11, 1984Assignee: Agri-Chain Products, Inc.Inventors: Gail G. Worsley, Thomas D. Woodward
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Patent number: 4467598Abstract: 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: GrantFiled: April 28, 1981Date of Patent: August 28, 1984Inventor: William M. Wells
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Patent number: 4463550Abstract: A link set capable of connection in series to form an endless silent chain has a pair of guide links held apart by, and non-rotatively fastened to the ends of a pair of pins. A central link pack devoid of bushings to maximize the amount of material available to resist the stresses encountered under load is connected between and directly engages the pins. A pair of articulating link packs are rotatively connected to one of the pins on either side of the central link pack. Bushings are provided in the articulating packs to improve the wear life of the chain.Type: GrantFiled: September 21, 1981Date of Patent: August 7, 1984Assignee: PT Components, Inc.Inventor: Stellios A. Avramidis
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Patent number: 4428781Abstract: A steel with good weldability and hardenability, a yield point of at least 600 MPa, a rupture limit of at least 900 MPa at room temperature and an impact toughness of at least 40 Joule at -20.degree. C., has the following chemical composition as % by weight:C: 0.03-0.07Si: 0.10-1Mn: 1.2-2.5Cr: 1.8-3Ni: 1.5-3Mo: max 0.5Nb, V, Ti total 0-0.10with the remainder mainly only iron and impurities in normal amounts. The best impact toughness in achieved when the ratio Mn/Cr is about 2/3 or 0.6. The total content of Mn+Cr is, in accordance with a preferred embodiment, between 3 and 5, suitably between 3.5 and 4.5%. The steel is particularly suitable for anchor chains for e.g. off-shore oil drilling platforms. A recommended heat treatment after welding includes normalizing at 800.degree.-1000.degree. C., cooling to room temperature and duplex annealing.Type: GrantFiled: September 24, 1982Date of Patent: January 31, 1984Assignee: Uddeholms AktiebolagInventor: Lars A. Norstrom
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Patent number: 4411131Abstract: 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: GrantFiled: January 5, 1981Date of Patent: October 25, 1983Assignee: Tsubakimoto Chain Co.Inventors: Tatsuo Ohnishi, Takeshi Uemura, Teruo Nakajima
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Patent number: 4400933Abstract: A connecting link having identical C-shaped elements which are mated by movement first transversely and then longitudinally relative to each other and equipped with internal, deformable locking means.Type: GrantFiled: March 16, 1981Date of Patent: August 30, 1983Assignee: ESCO CorporationInventors: Dale A. Fillmore, Terry L. Briscoe
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Patent number: 4373910Abstract: A chain for use on rotary kiln type devices has a plurality of flat area links each with flat areas and loops at each end joined by connector loops. The loops are defined by extensions from each side of the flat area with the extensions defining an opening which at their junction has a smaller inside radius of curvature than the radius of curvature of the contacting portion of said connector links, causing the flat area links to hang with their flat areas parallel to each other and perpendicular to the median plane of said connector links.Type: GrantFiled: September 1, 1981Date of Patent: February 15, 1983Inventor: Jorgen O. Bernt
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Patent number: 4355502Abstract: A polymeric chain link including two sidebars and a barrel connecting the sidebars. The barrel is comprised of a male barrel portion and a female barrel portion, each barrel portion being an integral extension of one of the sidebars. The male barrel portion fits inside the female barrel portion, and the inner mating surface of the female barrel portion cooperates with the outer mating surface of the male barrel portion to couple the two portions, mechanically locking them together.Type: GrantFiled: December 24, 1980Date of Patent: October 26, 1982Assignee: Rexnord Inc.Inventor: Jerome F. Sheldon
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Patent number: 4272952Abstract: A plastic chain has a link which includes two sections formed of molded thermoplastic material. One end of each link section includes a first opening and is shaped so that when the link sections are joined, the ends will be spaced apart and the first openings aligned. The other end of each section includes a second opening. First and second mating means cooperate to join the other end to form a link. The ends with the first openings are spaced apart a sufficient distance to accommodate at least a portion of the joined other ends of an adjacent similarly-shaped link so that the first openings can be aligned with the second openings in the adjacent link to receive a link pin which is in the form of a hollow tube with a manually releasable resilient latch.Type: GrantFiled: May 8, 1979Date of Patent: June 16, 1981Assignee: Dresser Industries, Inc.Inventor: Richard B. Graham
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Patent number: 4271663Abstract: Adjacent links of a chain are releasably locked together by a pin, which is inserted through the pivot joints of the chain. The pin has spaced apart shoulders which engage the outer surfaces of the outer links at the pivot joints when the pin is fully inserted in the links. The pin has a front end which is compressible to permit passage of the forward locking shoulder through the inner and outer links of the chain.Type: GrantFiled: June 22, 1979Date of Patent: June 9, 1981Assignee: FMC CorporationInventors: Harry W. Templin, Edward O. Enders
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Patent number: 4265084Abstract: PCT No. PCT/US79/00504 Sec. 371 Date July 16, 1979 Sec. 102(e) Date July 16, 1979 PCT Filed July 16, 1979A method and apparatus for assembling an articulated track chain (10) affording controlled minimum end play, the chain (10) comprising a plurality of coacting, overlapping pairs of oppositely disposed links (20,22,24,26) having integral interconnecting pin and sprocket engaging members (16,18). An apparatus (122,124) for locating the coacting, overlapping pairs of links (20,22,24,26) at a preselected position on the pin (16,18), regardless of the variations in the link thickness due to manufacturing tolerances is disclosed.Type: GrantFiled: July 16, 1979Date of Patent: May 5, 1981Assignee: Caterpillar Tractor Co.Inventor: Richard E. Livesay
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Patent number: 4263779Abstract: 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: GrantFiled: April 4, 1979Date of Patent: April 28, 1981Assignee: Rexnord Inc.Inventor: Victor D. Petershack
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Patent number: 4244687Abstract: A chain for use with kilns defines links, each with a flat area. The connection between the links is such that the flat areas in adjacent links tends to align with each other in the hanging attitude of the chain whereby the chain may be hung with the flat areas facing axial flow of materials in the kiln and acting as an impediment thereto. Arrays of such chains are hung from the wall of the kiln to collectively impede the flow of gas-borne particulate material.Type: GrantFiled: April 30, 1979Date of Patent: January 13, 1981Assignee: J. O. Bernt & Associates LimitedInventors: Jorgen O. Bernt, Barry C. Forster
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Patent number: 4220052Abstract: The ends of the metal pins of a chain of balanced design are carried in the aligned bores of the chain link sidebars. The links are of an engineering plastic and the ends of each pin are deliberately fitted differently in the one and the other bores of the two sidebars such that cyclic loading as in chain operation causes the pin to "walk" in the direction of the other bore. Abutment means prevents movement of the pin in that direction and the pin is thereby self-securing but can be readily removed in the other direction when required.Type: GrantFiled: May 25, 1979Date of Patent: September 2, 1980Assignee: Rexnord Inc.Inventor: Jerome F. Sheldon
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Patent number: 4216070Abstract: A system for cathodic protection of anchor chain-cables.The chain-cable in this system comprises at least one stud-link, and at least the outer layer of the stud of at least one such link consists of soluble anodic material.The purpose of this device is to ensure unbroken cathodic protection of an anchor-chain for a given number of years.Type: GrantFiled: March 28, 1979Date of Patent: August 5, 1980Assignee: Societe Nationale Elf Aquitaine (Production)Inventor: Robert Debost
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Patent number: 4198814Abstract: A chain of the trolley conveyor type has T-headed pins and links with slots at each chain joint for assembly and disassembly wherever desired. The slots of the center link are slightly restricted to prevent disassembly when not desired, as in handling the chain. Also, U-shaped center link bushings in which the pins are turnable and with which the pins may pivot for chain side-flexing provide a restriction to assembly and disassembly and particularly the latter so that unintended disassembly is prevented.Type: GrantFiled: August 31, 1978Date of Patent: April 22, 1980Assignee: Rexnord Inc.Inventor: Ralph R. Schoenick
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Patent number: 4134255Abstract: 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: GrantFiled: November 22, 1977Date of Patent: January 16, 1979Assignee: Columbia Steel Casting Co., Inc.Inventors: Robert T. McBain, Bruce C. Johnson
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Patent number: 4129285Abstract: 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: GrantFiled: March 18, 1977Date of Patent: December 12, 1978Inventor: John P. Graham
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Patent number: 4110971Abstract: A link chain, particularly for use as an anchor chain, comprises a plurality of links joined together in sequence, each link including a closed member comprising a pair of facing U-shaped portions, the base of the U at each end of the member having a portion of its inside surface of part cylindrical form, the cylindrical axes of said portions being arranged substantially transversely with one convex and the other concave so that the part cylindrical convex surface of one end of one link mates with one part cylindrical concave surface at the other end of a preceding link when the chain is straight under tension, and enables the chain to withstand greater loads, the U-ends being shaped to permit relative pivoting of the links about an axis substantially transverse to the plane of the link.Type: GrantFiled: February 3, 1977Date of Patent: September 5, 1978Inventor: Peter Bruce
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Patent number: 4086855Abstract: A shallow low cost conveyor system is disclosed for use with tow vehicles. The conveyor chain is provided with a drive which includes two idler sprockets and a drive sprocket all disposed to one side of the tow pin slot so that there is no chain in the adjacent portion of the slot. An auxiliary transfer mechanism transfers the tow pin across said portion of said slot.Type: GrantFiled: April 5, 1976Date of Patent: May 2, 1978Assignee: SI Handling Systems, Inc.Inventor: John L. Newbegin
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Patent number: 4067188Abstract: A heavy-duty chain link which constitutes a chain for use with vessels and the like. The link is fitted with a stud across the center thereof, which tends to prevent stretching and kinking of the link. Heat sources such as electron beams and plasma arcs fusion weld the abutting of two ends of the link, and the stud is wedged at at least one of its ends to said link by means of roots of weld beads provided by the heat sources. Such wedges lie at a right angle with the axis of the link for most effectively preventing the stretching and kinking of the link when it is subjected to a heavy load. A method of making this kind of stud chain link is disclosed also.Type: GrantFiled: September 24, 1976Date of Patent: January 10, 1978Assignee: Kyuroku Kabushiki-KaishaInventor: Soroku Takahashi
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Patent number: 4060978Abstract: 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: GrantFiled: February 24, 1977Date of Patent: December 6, 1977Assignee: Columbia Steel Casting Co. Inc.Inventors: Robert T. McBain, Bruce C. Johnson
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Patent number: 4050323Abstract: Industrial conveyor chains of pintle-connected types featuring stub journals removably interengageable with socket bearings through access leads which provide increased bearing surface area and shear strength in the pivoted connections relieving the connecting pins of all or a major role in the bearing and load carrying functions of the link couplings.Type: GrantFiled: January 12, 1976Date of Patent: September 27, 1977Inventor: Thomas I'Anson
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Patent number: 4036010Abstract: A studded chain link wherein a stud is inserted between the sides of the link and fixed thereto only by pressing said sides of the link towards the opposed ends of the stud, the ends of said stud having concave configuration in two mutually perpendicular planes.Type: GrantFiled: April 2, 1976Date of Patent: July 19, 1977Assignee: Bergvik och Ala AktiebolagInventor: Bengt Hedman
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Patent number: 4034556Abstract: 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: GrantFiled: November 20, 1975Date of Patent: July 12, 1977Assignee: A/S Pusnes Mekaniske VerkstedInventor: Simon Riber
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Patent number: 4002509Abstract: 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: GrantFiled: December 22, 1975Date of Patent: January 11, 1977Assignee: Stora Kopparbergs Bergslags AktiebolagInventors: Barbro Marie Rohlin, Sten Lennart Bergh, Gustav Nils Herman Westerberg
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Patent number: 3965769Abstract: A continuous press has two rotatively driven endless conveyor belts forming opposed, substantially linear spans defining a pressing zone, press platens applying pressure through these traveling spans to work carried therebetween, and anti-friction means being interposed between the platens and the spans. Such a press is improved in that the anti-friction means is formed by a multiplicity of endless loops of rotatively unpowered roller chains forming a bed interposed between the platens and the belt spans, the roller chain spans extending longitudinally with respect to the belt spans and being transversely packed together, but each chain being individually free to travel independently with respect to the others and to the belt span. The chains are formed so as to not have a continuous link gap so that the overall path is free from transverse interspacing.Type: GrantFiled: November 4, 1974Date of Patent: June 29, 1976Assignee: Eduard Kuesters MaschinenfabrikInventors: Karl-Heinz Ahrweiler, Valentin Appenzeller, Kurt Quoos, Eduard Kusters