Pneumatic Tire Patents (Class 152/405)
  • Patent number: 11932049
    Abstract: Assembly of a rim and of a flexible adapter, intended to make up, with a tyre, a rolling assembly. The rim having a mounting well that is extended axially by a boss, a rim seat and a rim flange that extends the rim seat axially on the outside, with a bearing face of substantially radial orientation. The adapter having an axially inner end intended to rest on the rim seat, an axially outer end and a substantially cylindrical body that connects the axially inner end and the axially outer end and is intended to receive, in cooperation with the axially outer end, a tyre bead. The rim seat of the rim has an inclination relative to the axis of rotation of between ?2 and +6 degrees, the angle being counted as positive when the virtual vertex of the substantially frustoconical seat is situated axially on the outside.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: March 19, 2024
    Assignee: MAXION WHEELS HOLDING GMBH
    Inventors: Daniel Walser, Johan Vits, Bertrand Vedy
  • Patent number: 10259261
    Abstract: A wheel (10), including a rim (12) and a disc (14) by which the wheel (10) is attachable to a hub of a vehicle, the disc (14) being attachable to the rim (12) by means of generally axially extending fasteners (20), each of which passes through a respective opening (18) of the disc (14) and is received in a respective generally axially extending passage (24) provided in a connecting member (16) of the rim (12), wherein the wheel (10) also includes a spacer (40) having an axial depth to space the disc (14) from the connecting member (16) of the rim (12), the spacer (40) including an opening (42) through which a fastener (20) is receivable to connect the disc (14) to the connecting member (16) of the rim (10), and a locating member (44) which is receivable in a corresponding locating opening (26) in the connecting member of the rim (12).
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: April 16, 2019
    Assignee: GKN Wheels Ltd.
    Inventor: Paul Michael Turner
  • Patent number: 9925827
    Abstract: The present disclosure provides devices related to aircraft wheel assemblies and aircraft wheel air pressure release channels. In various embodiments, an inboard aircraft wheel half may comprise an inboard flange portion disposed on an inboard end of the inboard wheel half, a bolted flange portion disposed on an outboard end of the inboard wheel half, and a tubewell portion disposed between the inboard flange portion and the bolted flange portion. In various embodiments, the bolted flange portion may comprise an o-ring seat, an inboard bolt hole, a register, and a release channel disposed in the register.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: March 27, 2018
    Assignee: Goodrich Corporation
    Inventor: Nathaniel John Herrmann
  • Patent number: 9469156
    Abstract: Wheel hub and method for forming a wheel hub. Wheel hub includes a rim having a circumferential surface with axial ends, and one rim flange being arranged at each axial end of the circumferential surface. The rim includes a fiber-reinforced plastic as a main component and each of the rim flanges is releasably connectable to the rim.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: October 18, 2016
    Assignees: ROEDER PRAEZISION GMBH, FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Andreas Bueter, Erik Bormann, Paul Becker, Branko Kupresanin
  • Patent number: 8925604
    Abstract: A take-apart vehicle wheel assembly includes an inner wheel part defining an axis and including a generally radially extending annular flange having an outboard surface; an outer wheel part configured to be secured to the inner wheel part, the outer wheel part including a generally radially extending annular flange having an inboard surface; a gap defined between the outboard surface of the inner wheel part and the inboard surface of the outer wheel part in an area adjacently surrounding each of a plurality of stud receiving holes formed in the inner and outer wheel parts; and a seal disposed in the gap; wherein the gap is formed by providing a recess in at least one of the outboard surface of the inner wheel part and the inboard surface of the outer wheel part in at least a portion of the area adjacently surrounding each of the plurality of stud receiving holes formed therein.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: January 6, 2015
    Assignee: Hayes Lemmerz International, Inc.
    Inventor: Christopher A. Putz
  • Patent number: 8505598
    Abstract: The instant invention is a pressure release safety system for a multi-piece wheel rim and tubeless tire combination, teaching designs for automatically relieving/releasing pressure as part of its disassembly. In this invention, fastening elements used to hold together portions of a wheel rim are provided with a blocking device or devices that prevents loosening and/or removal of fastening elements until said blocking device is first moved from a blocking position, where movement of the blocking device from its blocking position directly or indirectly opens or requires the opening of a pressure relief channel or channels—allowing, enabling and effecting depressurization of the sealed pressure vessel. When applied in the context of a tubeless two-piece wheel/tire assembly, the invention advantageously may include a blocking or safety device (typically in the form of a ring) that covers all or a critical portion of the nuts/studs that hold the two piece wheel together.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: August 13, 2013
    Assignee: Hutchinson, S.A.
    Inventors: Olivier Marsaly, Larry K. Rogers, Peter K. Hobe
  • Patent number: 8029071
    Abstract: A take apart vehicle wheel assembly includes at least a first, a second and a third wheel part operatively connected together to form the take apart vehicle wheel assembly. A first one of the first, second and third wheel parts is provided with a plurality of first stud receiving holes spaced circumferentially therearound in a first unevenly spaced circumferential pattern such that each of the first stud receiving holes is spaced apart from a next adjacent first stud receiving hole by a different angular spacing. A second one of the first, second and third wheel parts is provided with a plurality of second stud receiving holes spaced circumferentially therearound in unevenly spaced circumferential pattern which corresponds to the first unevenly spaced circumferential pattern of the first stud receiving holes to enable stud bolts and nuts to be used to releasably connect the first one and the second one of the first, second and third wheel parts together.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: October 4, 2011
    Assignee: Hayes Lemmerz International
    Inventors: Chris Putz, Dave Hengstebeck
  • Patent number: 7779877
    Abstract: A take apart vehicle wheel assembly includes at least a first, a second and a third wheel part operatively connected together to form the take apart vehicle wheel assembly. A first one of the first, second and third wheel parts is provided with a plurality of first stud receiving holes spaced circumferentially therearound in a first unevenly spaced circumferential pattern such that each of the first stud receiving holes is spaced apart from a next adjacent first stud receiving hole by a different angular spacing. A second one of the first, second and third wheel parts is provided with a plurality of second stud receiving holes spaced circumferentially therearound in unevenly spaced circumferential pattern which corresponds to the first unevenly spaced circumferential pattern of the first stud receiving holes to enable stud bolts and nuts to be used to releasably connect the first one and the second one of the first, second and third wheel parts together.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: August 24, 2010
    Assignee: Hayes Lemmerz International, Inc.
    Inventors: Chris Putz, Dave Hengstebeck
  • Patent number: 7451794
    Abstract: A take-apart safety vehicle wheel assembly includes an inner rim and an outer rim joined thereto. The inner rim includes an outer cylindrical surface and a generally radially extending disc portion. The outer rim includes a generally axially extending portion defining an inner cylindrical rim surface and a generally radially extending disc portion having an air passage formed therethrough. An air passage groove is formed in one of the inner rim and the outer rim, and extends from the air passage to a tire air chamber of the wheel.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: November 18, 2008
    Assignee: Hayes Lemmerz International, Inc.
    Inventors: Lindsey T. Baird, Ross S. Hill
  • Patent number: 7083238
    Abstract: A multi-piece safety wheel includes a plurality of circumferentially spaced, interlocking bosses and tabs on the inner rim portion and outer rim portion. In the event of improper disassembly of the wheel with an inflated tire mounted thereon, any failure of the wheel assembly fasteners will result in the outer rim portion separating from the inner rim portion a sufficient distance to vent air pressure from within the tire, at which point the interlocking bosses and tabs resist further movement of the outer rim portion. The outer rim portion is thereby resisted from becoming a potentially dangerous projectile. A method of safely deflating the tire upon improper disassembly of the multi-piece safety wheel is also provided.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: August 1, 2006
    Assignee: Alcoa, Inc.
    Inventors: Roger Frank Clements, Zara Finley Hudson, Matthew Charles Brest, Donald R. Fenrich, III, Warren R. Gleason, Dennis R. Werthman
  • Patent number: 6763865
    Abstract: A wheel (1) includes three parts: an outer rim (2), an inner rim (3), and a disc (4) joined by coach screws or stud bolts (18) directly screwed into the thickness of a wall (10) of the inner rim (3). The outer rim (2) is made from stamped light alloy plate, while the other parts are obtained by casting or other process. A portion of the outer rim (2) is compressed between the disc (4) and a portion of the inner rim (3).
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: July 20, 2004
    Assignee: O.Z. S.p.A.
    Inventor: Claudio Bernoni
  • Patent number: 6315366
    Abstract: A take apart safety vehicle wheel assembly including a disc, an inner rim joined to the disc, and an outer rim joined to the disc. The disc has a generally centrally located wheel mounting surface and includes an outer annular flange which defines an outer cylindrical surface. The inner rim includes an inboard tire bead seat retaining flange, an inboard tire bead seat, a generally axially extending well, and an outboard tire bead seat which terminates at an axial endmost surface. The outer rim includes an inner mounting surface and outer annular flange. The outer annular flange of the outer rim defines an outboard tire bead seat retaining flange of the take apart safety vehicle wheel assembly and includes an inner surface. An elastomeric member disposed in a cavity defined by the axial endmost surface of the inner rim, the inner surface of the outer annular flange of the outer rim, and the outer cylindrical surface of the outer annular flange of the disc.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: November 13, 2001
    Assignee: Hayes Lemmerz International, Inc.
    Inventors: Charles C. Post, James B. Weeks, Michael R. Bernard, Joseph S. Reding, Gale Raymond
  • Patent number: 5018566
    Abstract: A three-piece steel wheel rim for vehicle tires containing a front part, a center part, and a rear part. The front part and the rear part converge at the rear surfce of the center part and are bolted to the center part. Above the point of conversion, the rear part and the front part widen to form a V-shaped pocket which is partially closed by a rearwardly extending bulge on the front part. An O-ring is contained within the pocket. The center part may have a rearwardly extending support upon which the rear part may rest.
    Type: Grant
    Filed: December 22, 1989
    Date of Patent: May 28, 1991
    Inventor: Ludwig Thoni
  • Patent number: 4836261
    Abstract: A take-apart wheel rim and disc assembly for use in a safety tire and wheel assembly which includes a pneumatic tubeless tire. The wheel includes an inboard rim part, a wheel mounting disc having an outer marginal flange telescoped into and secured to the inboard rim part, the disc flange having an outer surface protruding axially outboard beyond and clear of the inboard rim part. An outboard rim part telescopically received from an axially outboard direction over the disc flange, an O-ring seal disposed between the disc and opposing surfaces of the inboard and outboard rim parts, and a clamp ring for axially clamping the outboard and inboard rim parts together with the O-ring captured in compression between the disc and the opposing surfaces of the rim parts to seal against air leakage. The disc has an air bleed vent structure outboard of the O-ring and normally sealed from the tire cavity by the O-ring.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: June 6, 1989
    Assignee: Motor Wheel Corporation
    Inventors: James B. Weeks, Roger E. Payne, Roger E. Swartz
  • Patent number: 4682640
    Abstract: A closed torus tire may be inflated by means of a circumferential conduit located at the interface of the tire and a rim. The closed inflation chamber of the closed torus tire communicates with the circumferential conduit via an air inlet passageway through the annular base region of the tire's carcass. An inflation valve passageway through the rim also communicates with the circumferential conduit to provide an air conduit means for inflating the closed torus tire.
    Type: Grant
    Filed: June 21, 1982
    Date of Patent: July 28, 1987
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Robert E. Berger, Richard L. Crossman, William F. Conley
  • Patent number: 4658876
    Abstract: A pneumatic tire and a mounting system therefor, having constructional features designed to provide optimized operational characteristics. The tire has a low aspect ratio .lambda. and a low height ratio .theta. conforming substantially to the relations .lambda.=0.236/.theta. and 0.32<.theta.<0.39. The mounting system includes a vehicle axleborne drum and a pair of ring members adapted to be securely fastened to the drum, each ring member defining a bead seat, a bead restraining flange and a sidewall-supporting extension, and the ring members being adhered to the tire at the beads and the lower sidewalls. A layer of a suitable sealant at the juncture between each ring member and the drum renders the joints airtight.
    Type: Grant
    Filed: July 23, 1985
    Date of Patent: April 21, 1987
    Assignee: The Uniroyal Goodrich Tire Company
    Inventor: Pierre J. Augier
  • Patent number: 4466670
    Abstract: According to this invention, there is provided a three piece wheel for vehicle tires comprising a disc and dual inner and outer rim and wherein the inner rim and the outer rim are at their radially directed bases secured by a fastening means to a disc mount connected to a hub through a plurality of spike members and the inner rim has an inwardly and axially curved portion formed integrally with the radially directed base thereof, characterized in that an annular V-shaped groove is defined between the inner and outer rims and is filled with a sealing material.
    Type: Grant
    Filed: July 24, 1981
    Date of Patent: August 21, 1984
    Inventor: Yasutaka Kaji
  • Patent number: 4424842
    Abstract: A vehicle wheel comprises two circular wheel halves, each having a portion of a rim, approximately one-half of the circumference of a safety tread and means for attaching the tread portion to the rim portion. The parts of the tread interface with each other on a bias so they can be brought together and separated by relative movement having a component transverse to the central axis of the wheel.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: January 10, 1984
    Inventor: Francois P. Trebaol
  • Patent number: 4373567
    Abstract: Adapters mounted between the beads of a tire and the respective bead seats of a standard rim to permit the mounting of oversize tires on standard rims. A first surface on an adapter is contoured to conform to and engage a respective rim bead seat and flange. A second surface on an adapter is contoured to conform to and engage a respective tire bead. The adapter may comprise an annular body, a pair of cores in the annular body, and a reinforcing ply enveloping the pair of cores.
    Type: Grant
    Filed: October 10, 1980
    Date of Patent: February 15, 1983
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Pierre J. R. Declercq
  • Patent number: 4308907
    Abstract: A pneumatic tire and wheel construction having a tire annularly disposed around the wheel and engaged therewith to form an air space for pressurized air. The tire is formed by a pair of undeformable side wall portions each having inner edges including beads of the tire and engaged with the wheel, a deformable side wall portion connected to each outer edge of the undeformable side wall portions, a restricted pliable wall portion connected each to outer edges of the deformable side wall portions and a belt portion connected between the outer edges of the restricted pliable wall portions. A tread carrying portion is connected to and around the outer surface of the belt portion and includes side projections extending axially outwardly of the belt portion with a cavity defined between each of the side projections and each of the restricted pliable wall portions respectively.
    Type: Grant
    Filed: May 15, 1979
    Date of Patent: January 5, 1982
    Inventor: Renato Monzini
  • Patent number: 4253514
    Abstract: A light alloy divided wheel rim comprises a pair of substantially symmetrical rim members fastened together in face-to-face relationship by fastening devices. Each rim member integrally includes an outer flange, an intermediate bead and an inner flange. The rim members further include reinforcing devices. An O-ring is positioned between the facing inner flanges. A device is provided for protecting the O-ring against excess fastening force applied by the fastening devices.
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: March 3, 1981
    Assignee: Daido Kogyo Co., Ltd.
    Inventor: Kazuo Imamura
  • Patent number: 4207940
    Abstract: The assembly of a large size pneumatic tire for a heavy off the road vehicle and an annular bead seat for a bead of the tire is characterized by the fact that said annular bead seat has a lateral face terminating in a flange and an inner face with a heel portion adjacent said lateral face and a toe portion meeting at a vertex and forming in radial cross section the shape of a very open V open toward said bead, and said bead has a reinforcing bead wire so arranged that the median plane of the bead wire intersects the toe portion of the inner face at a distance from the vertex at least equal to one-tenth of the diameter of the cross-section of the bead wire, the outer surface of the bead being thus in permanent contact with the lateral face and the inner face of the annular bead seat and the assembly being slidably mountable on a wheel of the vehicle.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: June 17, 1980
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventor: Jack Roger
  • Patent number: 4196765
    Abstract: A vehicle wheel having a detachable rim ring with a rim flange. The fastening means for the rim ring may be covered by a detachable plate which also seals off an air duct which leads to the hollow interior of the tire.
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: April 8, 1980
    Assignee: Continental Gummi-Werke Aktiengesellschaft
    Inventors: Herbert Heuer, Hans Kafer, Manfred Kunz
  • Patent number: 4121643
    Abstract: A pneumatic tire and wheel rim assembly comprises a one-piece wheel rim comprising a pair of annular flanges, inwardly of the outboard rim flange a bead seat adjacent and axially inwardly of which is a circumferential notch, a center portion of diameter substantially equal to the diameter of the bead seat, a well wide enough to accept a single tire bead adjacent the inboard rim flange and a blanking member blanking off said well and acting as at least a part of a bead seat for the inboard bead of the tire.
    Type: Grant
    Filed: May 11, 1976
    Date of Patent: October 24, 1978
    Assignee: Dunlop Limited
    Inventor: Thomas Holmes
  • Patent number: 4108228
    Abstract: A vehicle wheel equipped with an annular solid rubber tire having its marginal portions provided with beads resting in and held by lateral wheel flanges. The rubber tire extends around an annular channel into which the tire can partially deflect. The wheel flanges are spreadable away from each other by spring tension.
    Type: Grant
    Filed: November 26, 1975
    Date of Patent: August 22, 1978
    Assignee: Continental Gummi-Werke Aktiengesellschaft
    Inventor: Reinhard Tiemann
  • Patent number: 4106543
    Abstract: A structure for sealing air valves for split rim type wheels having an outer split rim member with a hole therein passing through a first end surface. The hole is provided with a screw thread. An inner split rim member has a passage therethrough from the periphery to a second end surface which butts with the first end surface of the outer split rim member. A sealing member is disposed in the hole, and an air valve is threadedly engaged in the hole to compress the sealing member against the second surface of the inner split rim member.
    Type: Grant
    Filed: September 23, 1976
    Date of Patent: August 15, 1978
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Shoichi Sano
  • Patent number: 4102379
    Abstract: A pair of split rim members are secured to the outer periphery of a wheel disc, and are provided with at least one projection piece which forms a space between it and the outer periphery of the wheel disc. An elastic sealing ring is inserted in such space to maintain airtightness, with the sealing ring having a normal width which is greater than the width of such space.
    Type: Grant
    Filed: September 23, 1976
    Date of Patent: July 25, 1978
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Tadashi Kamiya
  • Patent number: 4085786
    Abstract: An integral tire and rim assembly in which the tire is built and cured on the rim. The tire is a closed torus crown over-lap type having a pair of annular inextensible beads. The rim is an annular and axially continuous unitary rigid member with flanges that extend radially outwardly beyond the minimum diameter of the inextensible bead cores. A run-flat device is included in the tire cavity.
    Type: Grant
    Filed: November 19, 1975
    Date of Patent: April 25, 1978
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Vito A. Caravito
  • Patent number: 4043374
    Abstract: A wheel rim assembly comprises a pair of annular rim sections each having a rim flange secured on an outboard end thereof for retaining an air-inflated tire thereon. A pair of back-to-back mounting flanges extend radially inwardly from inboard ends of the rim sections and are bolted together. One of the mounting flanges preferably extends radially inwardly beyond the other mounting flange and is adapted to be bolted to an axle hub of a vehicle. At least two latch means are mounted on peripheral portions of the rim sections to straddle the same for releasably attaching them together. Carrying forth the method of this invention, the tire is first deflated whereby a tool may be inserted through an opening formed through one of the rim sections to release the latch means to provide for separation of the rim sections upon release of the bolts.
    Type: Grant
    Filed: December 17, 1975
    Date of Patent: August 23, 1977
    Assignee: Caterpillar Tractor Co.
    Inventor: Duane R. Smith
  • Patent number: 3999588
    Abstract: A split rim assembly, the one-half of the rim being furnished with both bead seating portions, one of said bead seating portions extending substantially parallel to the rim axis and merging into a ramp which is engageable by the toe of the bead of an associated tire to seal the tire/rim cavity. The diameters of the bead seating portions may be the same or alternatively the diameter of the outboard bead seating portion may be less than the diameter of the inboard bead seating portion.
    Type: Grant
    Filed: December 19, 1974
    Date of Patent: December 28, 1976
    Assignee: Dunlop Limited
    Inventor: William Eric Mitchell
  • Patent number: 3998258
    Abstract: An expandable tire rim arrangement is disclosed including a transversely split tire supporting rim having an outer peripheral tire engaging surface, an inner peripheral surface, and relatively circumferentially movable ends disposable between a rim diameter reducing position for ease of insertion of the supporting rim axially into a tire and a rim diameter increasing position, and a rim expanding and wheel mounting assembly having diametric dimensions somewhat larger than the diameter of the inner peripheral surface of the supporting rim when in its diameter reducing position and being axially slidably insertable into the supporting rim for tightly expanding it against the tire.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: December 21, 1976
    Assignee: Caterpillar Tractor Co.
    Inventors: Charles E. Grawey, John J. Groezinger
  • Patent number: 3990494
    Abstract: A vehicle wheel, on which a tire is mounted, comprised of two rim portions fixed together by fastening bolts is provided with a means to prevent disassembly of the rim portions while the tire mounted thereon remains inflated. In the preferred embodiment, a cover plate affixed to one of the rim members by a hinge is positionable over the heads of the fastening bolts and retained thereon by an elongated pin having an enlarged head, the pin extending through an aperture in the rim. The locking pin is urged to this locking position while the tire is inflated by pressure in the tire.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: November 9, 1976
    Assignee: Caterpillar Tractor Co.
    Inventors: Gary E. Stambaugh, Kenneth W. Timmons
  • Patent number: 3976116
    Abstract: A rim for a pneumatic tire carcass has a pair of rim portions which are securable together to form such rim. One rim portion is integral with a wheel hub and includes a plurality of pockets or guide openings formed therein. The other rim portion includes guide members which correspond to these pockets and which are positionable therein to position the rim portions relative to each other. Apparatus for separating the rim portions with the tire carcass mounted on them is disclosed, as is apparatus for pulling the tire carcass off a rim portion after the other rim portion has been separated therefrom. In another embodiment, a pair of rim portions are assembled by positioning posts fixed on one rim portion into angled slots defined by the other rim portion, and rotating one rim portion relative to the other, the posts being drawn into the slots during such rotation to draw the rim portions together.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: August 24, 1976
    Assignee: Caterpillar Tractor Co.
    Inventors: Charles E. Grawey, Robert W. Untz, Keith E. Koch, Charles F. Gekhardt
  • Patent number: 3938576
    Abstract: A divided or one piece wheel rim comprising two tire bead retaining flanges with inclined bead seating portions and a substantially flat well base portion positioned therebetween. A radially inwardly tapering groove being provided adjacent the toe portion of an associated tire bead.
    Type: Grant
    Filed: December 14, 1973
    Date of Patent: February 17, 1976
    Assignee: Dunlop Limited
    Inventor: William Eric Mitchell
  • Patent number: 3930527
    Abstract: A wheel having a pair of spaced-apart seats for tire beads and annular, axially extending rim portions extending from adjacent the bead seats and forming faces against which a sidewall of a tire can be deflected and supported when the tire is deflated.
    Type: Grant
    Filed: September 20, 1973
    Date of Patent: January 6, 1976
    Assignee: Dunlop Holdings Limited
    Inventor: Tom French