Serpentine Spring Patents (Class 192/45.016)
  • Patent number: 10415657
    Abstract: A one-way bearing, including: an outer race fixed around an inner supporting bracket, wherein the combination of the outer race and the inner supporting bracket defines a plurality of cavities between the outer race and the inner supporting bracket; and a rolling member provided in each of the plurality of cavities, wherein the rolling member is arrange to rotate and move within each of the plurality of cavities; wherein a blocking structure is provided at each of the plurality of cavities so as to block the rolling member within each of the plurality of cavities from entering an adjacent cavity.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: September 17, 2019
    Assignee: SHANGHAI CHANGYI MACHINERY MANUFACTURE CO., LTD
    Inventors: Bang Chen, Junrong Tan
  • Patent number: 10184531
    Abstract: A rotation transmission device includes torque cams provided between opposed surfaces of a flange of a control retainer and a flange of a rotary retainer and configured to convert an axial movement of the control retainer to relative rotational motion between the two retainers. All of the torque cams are circumferentially offset from all of the pillars of the control retainer and all of the pillars of the rotary retainer, and a pair of cam grooves forming each torque cam are heat-treated only at their areas that are brought into contact with a ball of the torque cam, to increase the hardness of these areas, thus improving the durability of the retainers.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: January 22, 2019
    Assignee: NTN CORPORATION
    Inventors: Takahide Saito, Koji Sato, Naotsugu Kitayama
  • Patent number: 9920821
    Abstract: A high-load linear actuator includes a driving mechanism, a worm shaft, a worm wheel assembly, a lead screw, a telescopic pipe and an outer pipe. The driving mechanism includes a base and a motor. The base has a supporting portion and an accommodating portion. The motor is fixed to the supporting portion. The worm shaft extends from the motor into the supporting portion. The worm wheel assembly includes a worm wheel and two bearings for supporting the worm wheel in the accommodating portion. The worm wheel is engaged with the worm shaft. The lead screw is disposed through the worm wheel and driven by the motor for rotation. The telescopic pipe slips on the lead screw to be threadedly connected therewith. The outer pipe slips on the telescopic pipe. The rotation of the lead screw drives the telescopic pipe to linearly extend or retract relative to the outer pipe.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: March 20, 2018
    Assignee: TIMOTION TECHNOLOGY CO., LTD.
    Inventor: Chou-Hsin Wu
  • Patent number: 8931609
    Abstract: The present invention provides a roller type one-way clutch comprising an outer race in which pockets provided at their inner surfaces with cam surfaces are formed, an inner race spaced apart from the outer race in a radial inner diameter side and disposed coaxially with the outer race for a relative rotational movement and having an annular outer peripheral track surface, a roller disposed within the pocket to be engaged with the cam surfaces and adapted to transmit torque between the outer race and the inner race, and an accordion spring disposed within the pocket and adapted to bias the rollers to be engaged with the cam surfaces, and wherein one end of each accordion spring is secured to an axial end face of the outer race.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: January 13, 2015
    Assignee: NSK-Warner K.K.
    Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando
  • Patent number: 8485332
    Abstract: The present invention provides a roller type one-way clutch comprising an outer race in which pockets provided at their inner surfaces with cam surfaces are formed, an inner race spaced apart from the outer race in a radial inner diameter side and disposed coaxially with the outer race for a relative rotational movement and having an annular outer peripheral track surface, a plurality of rollers disposed within the pockets to be engaged with the cam surfaces and adapted to transmit torque between the outer race and the inner race, a holder having a cylindrical portion and windows provided in the cylindrical portion to hold the plurality of rollers, and springs disposed within the pockets between the outer race and the inner race and adapted to bias the rollers to be engaged with the cam surfaces, and wherein the holder is rotatable relative to the outer race and biasing forces of the springs are transmitted to the holder via the rollers.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: July 16, 2013
    Assignee: NSK-Warner K.K.
    Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando
  • Patent number: 8459424
    Abstract: A freewheel clutch which has rollers arranged between an inner and outer ring. One of the rings has ramps that interact with the rollers. Each roller is spring-loaded against a ramp by a leaf spring. Each spring is held on a web of a cage by a U-shaped section that encompasses the web. The spring has a securing section connected to the U-shaped section that extends tangentially, limits mobility of a roller in a first radial direction, and is connected to a U-bottom of the U-shaped section. An end section of a U-leg facing away from the U-bottom is bent from the U-leg, forming a second securing section, which limits mobility of the roller in the second radial direction. An extension of the end section facing the U-bottom engages the web such that the spring is held on the web radially by the U-bottom and extension of the end section.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: June 11, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Frieder Altmann, Swen Doerrie
  • Patent number: 8434605
    Abstract: A one-way clutch of roller type comprises an outer race having pockets provided at their inner peripheries with cam surfaces, an inner race arranged in an inner diameter side of the outer race coaxially, a plurality of rollers disposed in the pockets and adapted to transmit torque between the outer race and the inner race when engaged by the cam surfaces, and accordion springs disposed in the pockets between the outer race and the rollers and having one ends secured to an axial end face of the outer race and adapted to bias the rollers toward engagement directions with respect to the cam surfaces, and the axial end face of the outer race is provided with a discriminating area to which the accordion springs are secured, and the discriminating area is capable of being discriminated from the other areas.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: May 7, 2013
    Assignee: NSK-Warner K.K.
    Inventors: Hirobumi Shirataki, Tomoharu Ando, Yasuhide Takasu, Shinya Okuma
  • Patent number: 8413778
    Abstract: A one-way clutch comprising an outer race provided with a pocket and having a groove portion formed at an inner diameter side of an axial one end face of the outer race, an inner race arranged coaxially with the outer race, a roller disposed in the pocket and adapted to transmit torque between the outer race and the inner race, a cage having a cylindrical portion with a window and a flange portion extending from an axial one end face of the cylindrical portion in an outer diameter direction, a projection provided on the cylindrical portion, a spring disposed in the pocket between the outer race and the roller and adapted to bias the roller toward an engagement direction with respect to the cam surface, and a side plate secured to abut against the axial one end face of the outer race and provided at its inner diameter portion with spline grooves, and wherein the cage is prevented from being rotated relative to the outer race by fitting the projection in the groove portion.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: April 9, 2013
    Assignee: NSK-Warner K.K.
    Inventors: Yasuhide Takasu, Shinya Okuma, Tomoharu Ando, Tetsuya Wakamori
  • Patent number: 8397888
    Abstract: The present invention provides a one-way clutch comprising an outer race, an inner race, a roller adapted to transmit torque between the outer race and the inner race, a cage having a window for holding the roller, a spring disposed in the pocket and adapted to bias the roller toward an engagement direction with respect to the cam surface, and a side plate provided at its inner diameter portion with spline grooves into which a crankshaft of an engine is fitted, and wherein the side plate is secured to the outer race by inserting rivets into through holes provided in the outer race and through holes provided in the side plate and by caulking the rivets.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: March 19, 2013
    Assignee: NSK-Warner K.K.
    Inventors: Hirobumi Shirataki, Tomoharu Ando, Yasuhide Takasu, Shinya Okuma
  • Patent number: 8393453
    Abstract: A one-way clutch comprising an outer race having at least one pocket and a stepped portion formed on an axial one end face of the outer race; an inner race spaced apart from and radially inside of the outer race and coaxially arranged for a relative rotational movement; a roller disposed in the pocket and adapted to transmit torque between the outer race and the inner race ; a cage rotatable relative to the outer race and having a window formed in a cylindrical portion and having a circumferential width smaller than a diameter of the roller and adapted to hold the roller; and a spring disposed in the pocket and adapted to bias the roller toward an engagement direction with respect to a cam surface; wherein a cover portion for covering at least a part of the pocket is provided on the other axial end face of the outer race.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: March 12, 2013
    Assignee: NSK-Warner K.K.
    Inventors: Hirobumi Shirataki, Tomoharu Ando