Drive Surfaces On Longitudinally Spaced Teeth Formed Integral With Flexible Member Patents (Class 474/205)
  • Patent number: 5254049
    Abstract: A synchronous drive belt for use in low speed and high torque applications has a zero pressure angle over a relatively greater portion of the fore and aft flank surfaces of the belt teeth when used in a belt-pulley combination. A pulley is also described which is particularly suitable for use in combination with the belt.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: October 19, 1993
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Michael J. W. Gregg
  • Patent number: 5242743
    Abstract: A rubber having fiber reinforcement embedded thereon. The reinforcement comprises a cylindrically braided cords of more than four and even numbered twisted yarns. Yarns are right twist oriented and left twist oriented and they are twisted in the reverse direction in an, S-twist and a Z-twist.
    Type: Grant
    Filed: February 20, 1991
    Date of Patent: September 7, 1993
    Assignee: Bando Chemical Industries, Ltd.
    Inventors: Yasuyuki Nakanishi, Susumu Onoe, Toru Kusakabe, Hiroshi Matsuoka
  • Patent number: 5234387
    Abstract: A toothed belt comprises an organic peroxide crosslinked hydrogenated nitrile rubber composition, having a co-crosslinking agent comprising N, N'-phenylene dimaleimide in combination with at least one substance from the group consisting of a higher ester of an organic acid, a metal salt of acrylic acid and a metal salt of methacrylic acid. The belt is characterized by excellent heat resistance and resistance to tooth slippage at higher temperatures under higher loads, and is useful as the toothed belt in a camshaft drive for high performance automobile engine.
    Type: Grant
    Filed: December 15, 1992
    Date of Patent: August 10, 1993
    Assignee: Tsubakimoto Chain Co.
    Inventors: Toru Fujiwara, Yoshinori Ito
  • Patent number: 5232408
    Abstract: A flexible tape drive system of the type having a flexible yet relatively longitudinally rigid perforated drive tape which is reciprocated by a toothed cog drive arrangement to provide both push and pull driving power. The drive system includes a substantially circular cog wheel having an outer base surface of a predetermined diameter and a plurality of radially extending cog teeth spaced about the periphery of the outer base surface. A cog wheel surround includes an outer guide track having an inner cog race with an inner surface of a diameter slightly larger than the base diameter of the cog and spaced substantially parallel therewith. A pair of oppositely disposed peeler tips are situated adjacent the top of the cog wheel surround between the outer guide track and the cog wheel, each including a peeler edge which has an arcuate inner face extending from the edge at a non-parallel orientation relatively to the base surface of the cog.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: August 3, 1993
    Assignee: E. F. Bavis & Associates, Inc.
    Inventor: Michael E. Brown
  • Patent number: 5230666
    Abstract: A prepolymer of the formula ##STR1## where LG is a linking group, and copolymers thereof; polymers prepared therefrom, and a reaction injection molding process employing the same.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: July 27, 1993
    Assignee: Dayco Products, Inc.
    Inventor: Charles M. Lewis
  • Patent number: 5209961
    Abstract: A toothed belt of the present invention comprises a back surface section and tooth sections that are made of an acrylonitrile-butadiene copolymer (NBR) with a hydrogenation rate of 90% or more; a tooth cloth that covers the surface of the tooth sections and tooth lands, the tooth cloth being made of an industrial nylon raw fiber with a viscosity relative to sulfuric acid of 2.45 to 2.53, a tensile strength of 5 g/denier or more, and a fineness of single fibers of 5 denier or less and being treated with resorcinol-formaldehyde-latex (RFL) liquid in which resorcinol-formaldehyde resin is mixed with a hydrogenated NBR as a latex component; and core fibers with a core diameter of 0.63 to 0.85 mm, the core fibers being made of twisted bundles of glass fibers of high strength.
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: May 11, 1993
    Assignee: Unitta Co., Ltd.
    Inventor: Junji Yokoi
  • Patent number: 5209705
    Abstract: A synchronous drive belt has at least two adjacent rows of teeth which are at oppositely balanced oblique angles to the longitudinal direction of the belt. In addition, the centerlines of the teeth in the adjacent rows are offset from each other by a distance of up to 10% to 90% of their pitch.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: May 11, 1993
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Michael J. W. Gregg
  • Patent number: 5171190
    Abstract: A woven fabric for covering a tooth part formed on a belt body of a synchronous belt is woven with a lengthwise yarn and a widthwise yarn. The lengthwise yarn is made of a crimped yarn of synthetic fiber or a covering yarn in which a crimped yarn of synthetic fiber is wound around an elastic cord yarn. The widthwise yarn is made of a spun yarn of synthetic fiber or meta-linked type aromatic polyamide fiber. The widthwise yarn expose more to the woven fabric surface than the lengthwise yarn. Thus, the belt life is lengthened and the noise reduced.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: December 15, 1992
    Assignee: Bando Chemical Industries, Ltd.
    Inventors: Akinori Fujiwara, Susumu Onoe, Michio Tanaka, Hiroshi Matsuoka, Tsutomu Shioyama
  • Patent number: 5131215
    Abstract: An endless belt construction comprising a single endless belt composed of synthetic resin material molded integrally with a reinforcing member in a single length passed through the resin material in a plurality of adjacent loops, such loops being spaced from one another.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: July 21, 1992
    Inventor: Geoffrey A. Williames
  • Patent number: 5123881
    Abstract: A flexible endless belt for full-track vehicles comprises a belt body made of an elastomeric material, and a longitudinal pull-resistant carrier embedded therein. The soil-engaging contact surface of the belt body is provided with projections while the inner surface flat for contacting the cylindrical mantle surface of rollers of the drive assembly. For the form-locking drive of such a belt and for achieving a vibration and noise reduced drive, the inner surface is provided with bending-resistant transverse stays that are embedded in the belt body and end flush with the edges of the inner surface of the belt. The inner surface is provided with longitudinally extending recesses before and after the transverse stays for engaging teeth provided at the drive roller.
    Type: Grant
    Filed: July 12, 1991
    Date of Patent: June 23, 1992
    Assignees: Continental Aktiengesellschaft, Intertractor Viehmann GmBH & Co.
    Inventors: Jurgen Brautigam, Heinz Lause
  • Patent number: 5102374
    Abstract: A toothed belt (1) having between its teeth (7) and the grooves (8) adjacent to the said teeth curvilinear connection segments (17) whose ends are located on the end of the tooth flank and the base line delimiting the grooves. The first end (18) of the curvilinear connection segment coincides with the first terminal point of an arc (20) tangent to the end of the flank and to the base line delimiting the grooves, the second end (19) of the curvilinear segment being located between the second point (21) of the said arc and the point of intersection (22) of the central axis of the groove L-L and the base line. Preferably, the toothed belt forms part of a transmission member including pulleys in which at least one of the pulleys is provided with teeth (24) filleted laterally with respect to the adjacent grooves (23) by curvilinear segments (31, 32) shaped to correspond to the curvilinear connection segments of the belt.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: April 7, 1992
    Assignee: Pirelli Trasmissioni Industriali S.p.A.
    Inventors: Vincenzo Macchiarulo, Tommaso Di Giacomo
  • Patent number: 5066344
    Abstract: An endless belt comprising a belt main body prepared from a liquid castable elastomeric material, a reinforcing fabric providing over the surface of the main body, and a shock absorbing layer of elastomeric material formed between the main body and the fabric. The belt is in the form of a flat belt or a belt having teeth or projections on at least one side thereof, has improved bending resistance and is operable with diminished noise. The belt is prepareed by a process comprising the steps of forming a shock absorbing layer of elastomeric material over the surface of a reinforcing fabric, fitting the fabric to one of an inner die and an outer die with the layer facing the other die, and pouring or injecting a liquid castable elastomeric material into a space between the fabric and the other die for molding.
    Type: Grant
    Filed: February 13, 1990
    Date of Patent: November 19, 1991
    Assignee: Nitta Industries Corporation
    Inventors: Junichi Inami, Koozi Kikuta, Satoshi Nakane, Kazumi Fujito, Hitoshi Hirosawa
  • Patent number: 5046993
    Abstract: A toothed belt having between its teeth and the grooves adjacent to the teeth curvilinear connection segments whose ends are located on the end of the tooth flank and the base line delimiting the grooves. The first end of the curvilinear connection segment coincides with the first terminal point of an arc tangent to the end of the flank and to the base line delimiting the grooves, the second end of the curvilinear segment being located between the second point of the arc and the point of intersection of the central axis of the grooves and the base line.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: September 10, 1991
    Assignee: Pirelli Trasmissioni Industriali S.p.A.
    Inventors: Vincenzo Macchiarulo, Tommaso Di Giacomo
  • Patent number: 5041063
    Abstract: A toothed belt where the crown surfaces of its teeth are to be disposed on the bases of gear wheel grooves is provided. In order to achieve a dampened, low-noise running-up of the toothed belt upon the gear wheel, as well as to achieve a free-of-play filling of the gear wheel grooves via the belt teeth in the direction of rotation as required for a reversible belt drive, embedded in the crown surface of each tooth belt is a crown piece made of a material that is elastically softer than the belt material. Viewed in the longitudinal cross-section of the belt, the crown piece extends essentially over the entire length of the crown surface of the belt tooth and protrudes from the crown surface in such a way that as the tooth runs up on the gear wheel, first the part of the curved outer side that protrudes the most strikes the base of the gear wheel groove, and subsequently this outer side is pressed flat against the groove by the belt tension.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: August 20, 1991
    Assignee: Breco kunststoffverarbeitungs-GmbH & Co. KG
    Inventors: Rudolf Breher, Rudi Kolling
  • Patent number: 5030174
    Abstract: A driving mechanism includes a timing belt stretched over a plurality of belt pulleys. The timing belt has a first surface provided with a group of teeth and a second surface provided with another group of teeth arranged with a pitch different from that of the group of teeth on the first surface. An image forming apparatus includes a driving mechanism for driving an image carrier or image forming means. The driving mechanism includes a timing belt stretched over a plurality of belt pulleys. The timing belt has a first surface provided with a group of teeth and a second surface provided with another group of teeth arranged with a pitch different from that of the group of teeth on the first surface.
    Type: Grant
    Filed: March 22, 1990
    Date of Patent: July 9, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Takeshi Eguchi
  • Patent number: 5015218
    Abstract: A toothed pulley is provided which includes a plurality of grooves alternating with a plurality of teeth. The flank of each groove is joined to the head of the adjacent tooth by a connection formed of at least two convex curvilinear segments and a recess. The curvilinear segments are tangent to the end of the flank and to the terminal point of the tooth head delimitated by the outer circumference of the pulley respectively. The pulley engages with a toothed belt which includes a connection between the tooth flank and the adjacent groove, which may be in the form of a parabolic arc.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: May 14, 1991
    Assignee: Pirelli Transmissioni Industriali S.p.A.
    Inventors: Vincenzo Macchiarulo, Tommaso Di Giacomo
  • Patent number: 5013286
    Abstract: A belt drive comprising a toothed belt and a toothed pulley. The belt is provided with a guide rib that extends in the longitudinal direction of the belt and traverses the teeth thereof. To provide lateral guidance of the belt on a toothed pulley, the guide rib engages an annular groove on the periphery of the pulley. Disposed on the base of the annular groove of the pulley is an insert that is made of a material that has a softer resilience than does the material of the belt. The radial height of the insert is such that when the toothed belt runs up onto the toothed pulley, the guide rib of the belt first contacts the soft-elastic insert, and only after radial compression of the insert do the belt teeth rest upon the corresponding surfaces of the toothed pulley.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: May 7, 1991
    Assignee: Breco Kunststoffverarbeitungs-GmbH & Co. KG
    Inventor: Rudolf Breher
  • Patent number: 5006096
    Abstract: A belt drive comprising a toothed belt and a toothed pulley. The belt has teeth that are divided into at least two strip-like rows that are disposed next to one another, with the rows being offset relative to one another in the longitudinal direction of the belt in such a way that the teeth of one row are disposed at least partially laterally adjacent to the grooves between the teeth of the adjacent row. In conformity with the number and offset of the rows of the teeth of the belt, the toothed pulley comprises at least two pulley sections that are staggered relative to one another and are connected to one another.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: April 9, 1991
    Assignee: Breco Kunststoffverarbeitungs-GmbH & Co. KG
    Inventor: Rudolf Breher
  • Patent number: 4998906
    Abstract: A tooth belt drive has tooth pulleys (5) with evenly distributed interruptions (22) in its teeth to temporarily interrupt the force excitation from the pulleys and to reduce the oscillation amplitude of the free parts of the belt between the pulleys.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: March 12, 1991
    Assignee: AB Volvo
    Inventor: Hans Moss
  • Patent number: 4993998
    Abstract: A toothed belt power transmission system having a belt tooth configuration and pulley groove configuration providing for clearances between the belt tooth root and pulley groove outer surface, and between the belt tooth tip surface and pulley groove inner surface. A power transmitting surface on a midportion of the tooth has facial engagement with a confronting sidewall surface at the midportion of the pulley groove side surface. Locations of the centers of the different arcuate surfaces of the pulley tooth and belt groove for providing the extended life, low noise operation of the drive are disclosed. A number of different constructions embodying the invention are disclosed.
    Type: Grant
    Filed: January 12, 1989
    Date of Patent: February 19, 1991
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Hiroyuki Tanaka, Takaji Nagai, Takahide Mizuno, Yasuhiro Hashimoto, Kazumi Kawai, Hideo Hirai
  • Patent number: 4976662
    Abstract: An endless power transmission belt construction and method of making the same are provided, the belt construction having opposed side edges and having an inner surface defining a plurality of longitudinally disposed and alternately spaced apart projections and grooves for meshing with a ribbed surface of a rotatable pulley or the like and defining a plurality of transversely disposed and alternately spaced apart projections and grooves that respectively extend between and to the opposed side edges, the longitudinal spacings between the transverse grooves or/and the depths of the transverse grooves being staggered so as to tend to reduce noise during normal operation of the belt construction with the pulley or the like.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: December 11, 1990
    Assignee: Dayco Products, Inc.
    Inventor: Joseph P. Miranti, Jr.
  • Patent number: 4957472
    Abstract: A snow vehicle and more particularly an improved track and driving arrangement therefor. The track has lugs on one side that are engaged with teeth of a drive sprocket for driving the track in a positive manner. The opposite side of the track and that which faces the ground has pairs of teeth disposed on opposite sides of the track drive lugs and each having different configurations which are mirror images of each other. One of the teeth of the pairs is configured to provide good traction in soft snow on its forward face and good traction on hard snow in its rearward face while the other tooth provides the opposite effects so that good traction will be provided in either direction of drive.
    Type: Grant
    Filed: August 1, 1989
    Date of Patent: September 18, 1990
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Tomio Nakano
  • Patent number: 4938736
    Abstract: An endless power transmission belt construction and method of making the same are provided, the belt construction having opposed side edges and having an inner surface defining a plurality of longitudinally disposed and alternately spaced apart projections and grooves for meshing with a ribbed surface of a rotatable pulley or the like and defining a plurality of transversely disposed and alternately spaced apart projections and grooves that respectively extend between and to the opposed side edges, the longitudinal spacings between the transverse grooves or/and the depths of the transverse grooves being staggered so as to tend to reduce noise during normal operation of the belt construction with the pulley or the like.
    Type: Grant
    Filed: September 20, 1989
    Date of Patent: July 3, 1990
    Assignee: Dayco Products, Inc.
    Inventor: Joseph P. Miranti, Jr.
  • Patent number: 4929221
    Abstract: A power transmission toothed belt drive having a belt tooth power transmission surface defined by an arc having a radius centered on a point approximately one-half the belt tooth pitch from the centerline of the tooth. The pulley groove has a sidewall surface which confronts the power transmission surface of the belt tooth centered on the same point when the belt tooth is fully meshed with the pulley groove in the operation of the drive. A relatively small clearance with the pulley is provided adjacent the belt tooth root and a relatively large clearance is provided between the pulley groove inner surface and the tip surface of the belt tooth. In one form of the invention, both the power transmission surface and tip surface of the belt tooth are defined by a single radius and the confronting pulley groove sidewall surface and inner surface confronting the belt tooth power transmission surface and tip surface have a constant clearance therewith and are defined by continuous circular arcs.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: May 29, 1990
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Hiroyuki Tanaka, Kuniharu Uto, Kazumi Kawai, Tsuneo Shaura, Motonobu Yasuhuku
  • Patent number: 4915674
    Abstract: A belt drive having a belt provided with longitudinally spaced teeth arranged to have a preselected clearance between the side flanks thereof and the side flanks of pulley teeth with which the belt teeth are meshed in a driving operation. The clearance is caused to be a maximum at the belt tooth tips and decrease to a minimum or zero at the belt tooth roots. Different belt tooth side flank curvatures are disclosed wherein the curvatures are centered on axes located at different locations relative to the belt body. The locations of the pulley tooth flank curvature axes are related to the positions of the belt tooth flank curvature axes and a number of different relative positions thereof are disclosed.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: April 10, 1990
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Hiroyuki Tanaka, Hideo Hirai, Kazumi Kawai, Tsuneo Shaura
  • Patent number: 4884998
    Abstract: An endless power transmission belt construction and method of making the same are provided, the belt construction having opposed side edges and having an inner surface defining a plurality of longitudinally disposed and alternately spaced apart projections and grooves for meshing with a ribbed surface of a rotatable pulley or the like and defining a plurality of transversely disposed and alternately spaced apart projections and grooves that respectivley extend between and to the opposed side edges, the longitudinal spacings between the transverse grooves or/and the depths of the transverse grooves being staggered so as to tend to reduce noise during normal operation of the belt constructuion with the pulley or the like.
    Type: Grant
    Filed: March 17, 1989
    Date of Patent: December 5, 1989
    Assignee: Dayco Products, Inc.
    Inventor: Joseph P. Miranti, Jr.
  • Patent number: 4878886
    Abstract: In a toothed belt, each tooth of the belt in longitudinal cross-section has a tooth top part composed of a pair of tooth top portions and a tooth tip portions formed in circular arcs, respectively, whose radius dimensions and location of centers are predetermined by a set of equations and inequalities so that a first contact point of the belt tooth with a pulley groove approaches to a tooth center line. In a power transmission device using the abovedescribed toothed belt and a toothed pulley, a shape of each pulley groove of the pulley is predetermined by a set of equations and inequalities so that a compressive force applied to the belt tooth during engagement concentrates to the tooth center line.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: November 7, 1989
    Assignee: Bando Chemical Industries, Ltd.
    Inventors: Masayuki Kitabayashi, Michio Tanaka
  • Patent number: 4850943
    Abstract: A toothed belt is provided which is made of an elastomeric material or the like and which comprises a plurality of teeth, alternating with spaces, covered with at least one layer of textile material. The elastomeric material forming the top of at least one tooth and the relative covering textile material layer are shaped to define at least one depression limited by two lateral protuberances. The seam joining the textile layer end portions is situated along the depression so that no rubbing can take place between the seam and a surface external to the belt. Preferably, the depression botton is formed to have a curvilinear shape and the ratio between the thickness "s" of the covering textile material layer and the bending radius "r" of the depression bottom ranges between 0.1 and 10.0.
    Type: Grant
    Filed: September 28, 1988
    Date of Patent: July 25, 1989
    Assignee: Pirelli Transmissioni Industriali S.p.A.
    Inventors: Tommaso DiGiacomo, Carlo Fiordaliso
  • Patent number: 4846771
    Abstract: A cogged belt (1) having an elastic base of which accommodates a carrying element (4) and an element (6) reinforcing cogs (5) of the belt (1). The reinforcing element (6) has the form of a corrugated band corrugations (7) of which are arranged inside the cogs (5) of the belt (1). The carrying element (4) is continuous through the length of the belt (1), whereas the reinforcing element (6) and its corrugations (7) have a width substantially the same as that of the carrying element (4) equal to the length of the cog (5) of the belt. The reinforcing element (6) is arranged at one side of the carrying element (4).
    Type: Grant
    Filed: February 25, 1987
    Date of Patent: July 11, 1989
    Inventors: Gennady G. Kozachevsky, Valery V. Guskov, Vladimir P. Boikov, Oleg I. Molodan, Svetlana I. Sizova, Jury N. Gorodnichev, Tamara P. Nazarenko
  • Patent number: 4840606
    Abstract: The combination of a toothed pulley and a toothed belt and method of making the same are provided. The toothed belt has teeth that serially mesh with cavities of the pulley that are respectively disposed between adjacent teeth thereof. Each belt tooth has a longitudinal cross-sectional configuration that defines a pair of spaced side faces that respectively have free end portions thereof that are remote from adjacent roots thereof. The teeth of the pulley and the belt are so constructed and arranged that each belt tooth would have the pair of free end portions thereof compressed radially outwardly and inwardly toward each other by the respective adjacent pulley teeth if that belt tooth is fully received in the cavity between those respective adjacent pulley teeth and those respective adjacent pulley teeth are just making contact with the land areas of the belt on each side of that belt tooth while being spaced from the respective roots of that belt tooth.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: June 20, 1989
    Assignee: Dayco Products, Inc.
    Inventor: Robert E. Wetzel
  • Patent number: 4840608
    Abstract: A toothed elastomeric belt for use in a power transmission system includes teeth having a cross-sectional configuration that includes a cycloidal convex curve that extends from the tooth tip and is smoothly connected to the bottom land between adjacent teeth by an arcuate fillet.
    Type: Grant
    Filed: July 28, 1987
    Date of Patent: June 20, 1989
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Junichi Araki, Nobuhiro Saito, Hidenori Tezuka, Masuhiro Saito
  • Patent number: 4838843
    Abstract: A toothed power transmission belt having a high modulus polyurethane body, an aramid type -II tensile member occupying up to about 88 percent of the belt width, and a wear-resistant fabric disposed along the belt inner surface at the tooth flanks.
    Type: Grant
    Filed: April 16, 1982
    Date of Patent: June 13, 1989
    Assignee: The Gates Rubber Company
    Inventor: William L. Westhoff
  • Patent number: 4832670
    Abstract: An endless power transmission belt construction and method of making the same are provided, the belt construction having opposed side edges and having an inner surface defining a plurality of longitudinally disposed and alternately spaced apart projections and grooves for meshing with a ribbed surface of a rotatable pulley or the like and defining a plurality of transversely disposed and alternately spaced apart projections and grooves that respectively extend between and to the opposed side edges, the longitudinal spacings between the transverse grooves or/and the depths of the transverse grooves being staggered so as to tend to reduce noise during normal operation of the belt construction with the pulley or the like.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: May 23, 1989
    Assignee: Dayco Products, Inc.
    Inventor: Joseph P. Miranti, Jr.
  • Patent number: 4826472
    Abstract: A toothed belt having a woven fabric adhesive-bonded to the surface thereof which is adapted to be brought into contact with pulley, wherein, out of the yarns forming the woven fabric, the yarns to be located in the longitudinal direction of the belt comprise crimped yarns obtained by subjecting to crimping nylon multi-filament yarns having a relative viscosity of about 2.5 to sulphuric acid, a filament fineness of 2.5 d or under, and a filament strength of 7.5 g/d or over. This toothed belt is excellent in wear resistance on the surface thereof which is adapted to be brought into contact with pulleys and does not suffer from cracking.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: May 2, 1989
    Assignee: Ashimori Kogyo Kabushiki Kaisha
    Inventors: Akihiro Sato, Mitsuho Yamada, Shigehiro Isshiki
  • Patent number: 4815265
    Abstract: Sprockets of a toothed belt drive for a double sickle harvesting header are carefully aligned relative to each other and to the toothed belt so that the belt can be twisted about its longitudinal axis during advancement along a closed loop path of travel in order to translate rotary motion about a first axis to rotary motion about a second axis which is inclined relative to the first axis. The toothed belt has semicylindrical teeth, and two idler pulleys contact a return portion of the belt to insure that the same are maintained in parallelism with grooves formed in sprockets of the mechanism in order to avoid imposition of side thrusts on the belt or undue wear on the teeth. The toothed belt reciprocates both sickles of the harvesting header in synchronous, timed fashion along directions opposite to each other so that vibrations which would otherwise be established by non-synchronous movement of the sickles are significantly dampened.
    Type: Grant
    Filed: July 14, 1987
    Date of Patent: March 28, 1989
    Assignee: Hay & Forage Industries
    Inventors: Ronald K. Guinn, Cecil L. Case
  • Patent number: 4799919
    Abstract: A cogged belt comprising an elastic base (3) which incorporates a carrying element and a reinforcing element which reinforces; cogs (1) of the belt and is in the form of a corrugated strip. Corrugations (5) of the strip are imedded in the cogs (1). The reinforcing element (2) has a width equal to the width of the cog (1), whereas the carrying element is formed by locks (4) disposed in the zone of the corrugations (5) to powerlock their bases and portions (6) of the reinforcing element (2) interposed between the corrugations (5).
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: January 24, 1989
    Inventors: Gennady G. Kozachevsky, Valery V. Guskov, Vladimir P. Boikov, Oleg I. Molodan, Svetlana I. Sizova
  • Patent number: 4786273
    Abstract: A cogged belt comprising an elastic base (1) which incorporates a carrying element in the form of a strip (2) with crimped lugs (4), and inserts (6) for reinforcing the cogs of the belt, and which are (3) connected to the strip (2) by these lugs (4). The lugs (4) are arranged at the outer opposite sides of the strip (2) laterally of the cogs (3). The lugs (4) are interconnected by a pin (5) having an insert (6) mounted thereon.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: November 22, 1988
    Assignee: Belorussky Politekhnichesky Institut
    Inventors: Valery V. Guskov, Gennady G. Kozachevsky, Vladimir P. Boikov, Oleg I. Molodan, Svetlana I. Sizova, Petr P. Kasperovich
  • Patent number: 4781658
    Abstract: A power transmission mechanism (10) having a V-belt (11) provided with transverse reinforcing elements (22). The V-belt, in the illustrated embodiment, defines a cog belt wherein the reinforcing elements are disposed within the cogs (15) thereof to have opposite end surfaces (23) exposed at the side edge surfaces (21) of the belt. A thin film of lubricating fluid (27) is provided on the exposed end surfaces of the reinforcing elements for improved long troublefree operation of the mechanism. Different structures for providing the thin film of lubricating fluid are disclosed. In the illustrated embodiments, the thin film extends along the entire side edge surfaces of the V-belt.
    Type: Grant
    Filed: January 12, 1983
    Date of Patent: November 1, 1988
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Hiroshi Takano, Shinichi Takagi, Akihiro Fujita
  • Patent number: 4776828
    Abstract: A toothed power transmission belt (10) is manufactured by an improved method to have substantially improved resistance to tooth root face cracking. The manufacture utilizes a modified rubber blend forming the teeth (15) and may utilize the same blend for embedding the load-carrying cords (14) to provide improved bonding of the teeth (15) to the cords (14) over a wide range of temperatures.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: October 11, 1988
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Satoshi Mashimo, Hajime Kakiuchi, Masayoshi Nakajima
  • Patent number: 4775357
    Abstract: A high capacity, toothed belt having an elastomeric body composed of a single elastomeric compound which includes from 2 to 30 parts of short fiber flock reinforcement. The flock must have a length to diameter (L/D) ratio less than 10:1.
    Type: Grant
    Filed: March 6, 1987
    Date of Patent: October 4, 1988
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: John C. Wolfe
  • Patent number: 4746330
    Abstract: The apparatus and method of this invention pertain to the sharpening of the blades of a reel mower having a framework about the reel. The apparatus comprises a belt having protuberances thereon, an assembly of pulleys and a drive motor for driving the belt and guiding the belt and protuberances to engage with the blades of the reel mower. The method of the invention is to use the apparatus of this invention and place it in a position so that, when the belt is revolved about the pulleys, the protuberances engage the blades of the reel mower thereby causing the reel to rotate in an opposite direction from the belt movement.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: May 24, 1988
    Inventor: Curtis D. Johnson
  • Patent number: 4722721
    Abstract: The combination of a toothed pulley and a toothed belt and method of making the same are provided. The toothed belt has teeth that serially mesh with cavities of the pulley that are respectively disposed between adjacent teeth thereof. Each pulley cavity has a longitudinal substantially trapezoidal cross-sectional configuration. Each belt tooth has a longitudinal cross-sectional configuration that defines a pair of spaced side faces that respectively has free end portions that are remote from adjacent roots thereof and that are spaced apart from each other by a bottom face of the tooth.
    Type: Grant
    Filed: November 5, 1986
    Date of Patent: February 2, 1988
    Assignee: Dayco Products, Inc.
    Inventor: Robert E. Wetzel
  • Patent number: 4721496
    Abstract: A toothed belt with improved durability, comprising: a back surface section and tooth section that are made of a hydrogenated acrylonitrile-butadiene copolymer (H-NBR) with a hydrogenation rate of 80% or more, a tooth cloth that covers said tooth section and tooth lands positioned between the adjacent tooth sections, said tooth cloth being made of industrial nylon raw fiber with a viscosity relative to sulfuric acid of 2.6 to 2.8, a tensile strength of 5 g/denier or more, and a fineness of single fibers of 5 denier or less, and a plurality of core fibers with a core diameter of 0.9 to 1.1 mm and a ratio of said core diameter to said tooth cloth thickness in the range of 1.8 to 5.0, said core fibers being made of glass fiber filaments with a first twist number of 1.7 to 2.6 twists/inch, and a final twist number of 1.8 to 2.3 twists/inch, twisted together.
    Type: Grant
    Filed: November 5, 1986
    Date of Patent: January 26, 1988
    Assignee: Unitta Co., Ltd.
    Inventors: Nobuyuki Yokoyama, Shigehiro Isshiki
  • Patent number: 4708700
    Abstract: In a driving force transmission mechanism using a timing belt for an internal combustion engine according to the present invention, a face width of teeth of the timing belt at dedendums of the teeth is set larger than a width of engagement of a tooth of the timing belt with a tooth of a timing pulley. In the mechanism, a certain degree of freedom in accordance with elastic deformation is given to the width end portions of teeth of the timing belt, and thereby concentration of a load can be decreased on a corner of the dedendum of the teeth. As a result, breakage of the fibers of a canvas and cracking of the teeth of the timing belt etc. can be prevented, and the durability and the span of life of the timing belt can be increased.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: November 24, 1987
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Shizuo Abe
  • Patent number: 4706800
    Abstract: A device for use with conveyor tracks, comprising a continuous drive element (2), arranges so as to be moved by drive device (30) on a track with steering mechanisms for the drive element and load-carrying elements moving along the track, they being equipped with attachment devices (28) to the driving element in such a manner that they can accompany the same in their movements for the transport of materials. Drive element (2) has the shape of a band with corrugations, between which are constructed transverse grooves. The material in the drive element is hard and resilient and is preferably composed of a stiff plastic material and is dimensioned in such a way that the corrugations and hence the grooves in general retain their shape during the intended drive resistance and the intended load under the effect of the pointwise applying driving elements (30).
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: November 17, 1987
    Inventor: Mats I. Davidson
  • Patent number: 4702729
    Abstract: A timing belt having an outer section defined by cogged ribs defining a preselected controlled coefficient of friction obtained by providing controlled size grooves extending transversely through the ribs. The ratio of the effective side area of the grooves to the side area of the cogs defined in the ribs by the grooves, in the illustrated embodiment, is in the range of approximately 1/2 to 21/2 where the coefficient of the rib material is approximately 0.35. The cogs are raw edged and provided with a cover fabric. The provision of the cogged ribs permits the belt to be used as a double timing belt as well as providing improved functioning with backside rib pulleys. The effective coefficient of friction obtained by reducing the side area of the ribs as a result of the provision of the grooves is preferably in the range of 0.15 to approximately 0.90.
    Type: Grant
    Filed: February 7, 1986
    Date of Patent: October 27, 1987
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Hiroyuki Tanaka, Eiichi Takami, Kyoichi Mishima, Mitsunobu Higashi, Toshimi Kumasaki
  • Patent number: 4701154
    Abstract: A laminated reinforcing material structure provides the reinforcement for a reinforced belt assembly. A method of manufacturing laminated reinforced belt assemblies is described.
    Type: Grant
    Filed: April 18, 1985
    Date of Patent: October 20, 1987
    Assignee: National Standard Company
    Inventor: Doyle W. Rausch
  • Patent number: 4696665
    Abstract: A pulley for a synchronous drive system comprising a toothed-belt of polymeric material, the pulley comprising grooves provided with flanks having a parabolic arc-shaped profile and a bottom whose ends coincide with the vertices of said parabolic arc-shaped profile. The length of the bottom is comparable with that of the parabolic arc-shaped profiles. Preferably, the grooves have a shape determined by a hob whose rolling pitch line is tangent to the outer circumference of the pulley.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: September 29, 1987
    Assignee: Pirelli Transmissioni Industriali S.p.A.
    Inventors: Vincenzo Macchiarulo, Ezio Marcelli
  • Patent number: 4690664
    Abstract: A reinforced elastomeric drive belt 20 having tooth-like protuberances 21 for meshing with the teeth of a pulley is provided with reinforcing fibers 27 distributed through at least a portion of each tooth 21.Also provided is a method for building the improved belt and an improved apparatus for building such a belt.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: September 1, 1987
    Assignee: Dayco Products, Inc.
    Inventor: Robert E. Wetzel
  • Patent number: 4681558
    Abstract: A reinforced belt assembly or construction which utilizes a reinforcing material comprised of a reinforcing member portion possessing a high Young's modulus discontinuous throughout the length of the reinforcing material and a carrier member portion extending the length of the reinforcing material. The carrier member portion facilitates transport and winding of the reinforcing material about a forming mandel during manufacture and facilitates cutting of the belt assembly from the cured reinforced sleeve material such that the high Young's modulus member does not emerge from the cut sidewalls of the belt assembly.
    Type: Grant
    Filed: April 18, 1985
    Date of Patent: July 21, 1987
    Assignee: National Standard Company
    Inventor: Doyle W. Rausch