Multiple Key Patents (Class 74/374)
  • Patent number: 11255412
    Abstract: The present invention provides a multi-speed transmission including: a driving shaft rotated by an input rotational force; a plurality of driving gears coupled to the driving shaft to be rotated by the rotation of the driving shaft; a plurality of transmission gears engaged with the driving gears; a transmission shaft including a plurality of pawls moved in and out of the outer circumferential surface, and coupled to the transmission gears, specifically, selectively coupled to at least a few of the transmission gears according to the in and out-movement of the pawls; a transmission control means for selectively controlling the in and out-movement of the pawls; a plurality of driven gears engaged with at least a few of the transmission gears; and a driven shaft coupled to the plurality of driven gears and transferring the rotational force to an object to be driven.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: February 22, 2022
    Inventor: Eun Su Han
  • Patent number: 8728350
    Abstract: There are provided a method for producing metal nanoparticles including preparing a first solution including a metal precursor, an amine, and a non-aqueous solvent; producing metal nanoparticles capped with amine by heating, agitating, and reducing the first solution; preparing a second solution by washing a non-reactive amine among the produced metal nanoparticles and dispersing the metal nanoparticles in the non-aqueous solvent; and partially capping an acid on the metal nanoparticles dispersed by adding the acid to the second solution and heating and agitating it, an ink composition using the same, and a method for producing the same. The exemplary embodiments of the present invention can provide a method for producing metal nanoparticles having surface stability, excellent adhesion, an effect of reducing cracks by modifying the substituents of metal nanoparticles, an ink composition using the same, and a method for producing the same.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: May 20, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Sung Koo Kang, Dong Hoon Kim, Joon Rak Choi
  • Publication number: 20100257969
    Abstract: A transmission system including a first shaft (3), a first gear element (13, 16, 17, 21, 22, 25) rotatably mounted on the shaft (3), a selector assembly (29, 31, 33) arranged to selectively lock the first gear element (13, 16, 17, 21, 22, 25) for rotation with the first shaft (3) and a damping system (200; 300; . . . 1300) arranged to damp the locking of the first gear element (13, 16, 17, 21, 22, 25) with the first shaft (3). A gear element (13, 16, 17, 21, 22, 25) including first and second parts (202, 204; 302, 304; . . . 1002, 1004; 1202, 1204) that are arranged to rotate relative to each other and a damping system (200; 300; . . . 1000; 1300) for damping the relative rotational movement.
    Type: Application
    Filed: November 21, 2007
    Publication date: October 14, 2010
    Applicant: Zeroshift Limited
    Inventors: William Wesley Martin, Anthony Joseph Child, Richard John Evan Thompson
  • Publication number: 20100162841
    Abstract: The invention relates to a set of devices for changing the gear ratio in a gearbox without false neutral positions. A casing includes: on a first axis, the shaft of the crankset including a primary sprocket, a tertiary shaft including fixed tertiary sprockets and tertiary sprockets on a free wheel; on a second axis, a secondary shaft includes a primary sprocket and secondary sprockets with inner flutes capable of free rotation on a smooth cylindrical bearing of the secondary shaft. The claims also relate to the following devices: each secondary sprocket has associated thereto one or more ratchets urged by a spring into a flute of the smooth bearing. A shuttle controlled by the user and moving inside the shaft applies a pressure, via spring loaded tabs, on the ratchets of the associated sprocket, which permits the engagement of two neighbouring sprockets during a gear change without any blocking or false neutral position.
    Type: Application
    Filed: March 10, 2008
    Publication date: July 1, 2010
    Inventor: Guy Cavalerie
  • Patent number: 6883395
    Abstract: A transmission shift system for idler wheels comprising at least one actuating device that actuates a respective sliding sleeve non-rotatably connected with a main shaft in order to bring the sliding sleeve to positive fit with an idler wheel to be shifted. It is provided that the shiftable idler wheel is disposed upon the main shaft directly juxtaposed in axial direction and that the respective actuating devices are provided as unit on the main shaft outside the group of idler wheels, each actuating device being connected with the respective sliding sleeve via at least one connecting element extending along the main shaft.
    Type: Grant
    Filed: May 12, 2003
    Date of Patent: April 26, 2005
    Assignee: ZF Friedrichshafen AG
    Inventor: Hermann Lanz
  • Patent number: 5732595
    Abstract: A slidable transmission shaft for a manual transmission includes a plurality of closely-spaced splines at a second end, a first plurality of keys at a first end, which are slidably engagable to an impeller fastened to the crankshaft of a motor vehicle for high gear, and a second plurality of keys spaced from the first plurality of keys and which are slidably engagable to a clutch for low gear. This slidable transmission shaft can also achieve reverse by sliding into a position where neither of the plurality of keys are engaged.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: March 31, 1998
    Inventor: Ernie Brookins
  • Patent number: RE32125
    Abstract: A change-speed transmission with a shift mechanism which selectively couples a plurality of change gears one at a time to a shaft on which the gears are journalled. The shift mechanism is disposed entirely within the transmission housing and includes a shift key arranged for axial sliding movement in a groove in the shaft. A pair of axially spaced projections at one end of the key project outwardly of the groove to embrace a collar which is journalled on the shaft. The collar is axially shifted on the shaft by a rotary shift fork which engages a circular groove in the collar to selectively position the key axially of the shaft in its several gear-engaging positions. A third radial projection at the other end of the key engages a different gear in each of the several positions thereby drivingly coupling the selected gear to the shaft to provide various forward drive speeds.
    Type: Grant
    Filed: March 26, 1981
    Date of Patent: April 29, 1986
    Assignee: Tecumseh Products Company
    Inventors: Roland L. Von Kaler, Norman E. Jolliff