Spur Gears Patents (Class 74/369)
  • Patent number: 8561492
    Abstract: A multi-stage transmission has driving gears m and driven gears n in constant mesh and supported for being individually engageable and disengageable with a hollow driven gear shaft. The transmission realizes a smooth speed change by providing cam rods within the driven gear shaft for engagement and disengagement between the driven gears n and the driven gear shaft and by providing compact lost motion mechanisms with axially acting springs for the cam rods, respectively. Swing pawl members each disengageably engage projections formed at circumferentially spaced positions on the inner peripheral surface of each driven gear n to control engagement and disengagement between each driven gear n and the driven gear shaft. The cam rods are moved in the driven gear shaft to operate the swing pawl members. Gear shift driving means includes a control rod moved in sliding contact with the inner surfaces of the cam rods.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: October 22, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventor: Shinya Matsumoto
  • Patent number: 8549941
    Abstract: Driven gears are supported on a hollow driven gear shaft in a manner engageable with and disengageable from a hollow driven gear shaft via swing pawl members. The transmission has first a engaging member for engaging the gear shaft with a first driven gear, so as to effect synchronous rotation thereof and a second engaging member for engaging the gear shaft with a second gear, one step lower in the reduction gear ratio than the first gear, so as to effect synchronous rotation thereof. When making an upshift by changing over the engaging member from the engagement with the first gear to the engagement with the second gear, the gear shift is made by engaging the second gear with the gear shaft through the second engaging member while the first gear is being in engagement with the gear shaft through the first engaging member.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: October 8, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventor: Shinya Matsumoto
  • Patent number: 8171814
    Abstract: A transmission system and method for operating the transmission system, where the transmission system includes a selector assembly arranged to select between gear ratios instantaneously without substantial power interruption. The selector assembly includes first and second sets of engagement members and an actuator system. The actuator system may have a first actuator member for moving the first set of engagement members, a second actuator member for moving the second set of engagement members, a first actuator device for actuating the first actuator member and a second actuator device for actuating the second actuator member independently of the first actuator device.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: May 8, 2012
    Assignee: Zeroshift Limited
    Inventors: William Wesley Martin, Anthony Joseph Child
  • Patent number: 5533416
    Abstract: A shift key mechanism using a lateral pivot riding on milled ridges on the outer surface of a shift shaft in order to index a spring biased shift key to a gear location.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: July 9, 1996
    Assignee: MTD Products Inc.
    Inventors: Mike Weirich, Kurt E. Vogt
  • Patent number: 5455767
    Abstract: A control for a motor vehicle drive having an automatic transmission includes a circuit configuration for generating an output signal adapting shifting points to a load state of the motor vehicle from an evaluation of a power takeoff rpm of the transmission or of a variable equivalent to it. The circuit configuration ascertains a deviation between a calculated and a measured power takeoff rpm in successive time intervals and forms a correction term by multiplication with a factor. At least one characteristic curve memory stores shifting points of the transmission. The at least one characteristic curve memory receives the correction term as an output signal for adapting a characteristic curve to the load state. In a method for controlling a vehicle drive having an automatic transmission, shifting points or characteristic curves for shifting are varied as a function of driving parameters.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: October 3, 1995
    Assignee: Siemens Aktiengesellschaft
    Inventor: Klaus Staerker
  • Patent number: 5404768
    Abstract: A speed changing arrangement for the bicycle having a changing arrangement mounted on the frame of the bicycle and positioned between the left and right pedals. The speed changing arrangement generally includes: a speeding changing gear set engaging an output gear set, a gear shifting shaft and a hand lever to manipulate the gear shifting shaft. The hand lever can be utilized to manipulate a neutral gear cable and a gear shifting cable, so that the gear shifting shaft can be moved within a spacing between the speed changing gear set of the desired gear stage and the output gear set.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: April 11, 1995
    Inventors: Tan J. Hwang, Chin K. Lo
  • Patent number: 4773277
    Abstract: A self-contained remotely actuated power take-off assembly for front mounting to an engine. A sump containing hydraulic fluid is contained within the power take-off housing to supply hydraulic fluid by a gerotor pump connected to the output shaft supplying fluid under pressure to a piston and cylinder hydraulic actuator. A friction disk clutch operatively engages a gear train between the input and output shaft when acted upon by the piston. A remotely operated solenoid valve located between the pump and hydraulic cylinder is used for such actuation.
    Type: Grant
    Filed: December 17, 1986
    Date of Patent: September 27, 1988
    Assignee: Dana Corporation
    Inventors: Richard A. Cook, Thomas W. Huetteman
  • Patent number: 4716777
    Abstract: A ten-speed transmission which is located inside the hub of the driving wheel of a pedal powered vehicle, and which includes a pedal drive shaft mounted in bearings on the axis of the wheel, is used to provide a compact, low maintenance alternative to the chain and derailleur system used for conventional multiple speed bicycles. Three idler shafts divide the pedal torque between three gear teeth permitting the gear widths to be one third that which would be required for a transmission using a single idler shaft. The resulting narrow gears coupled with a shift arrangement which adds nothing to the transmission width, permits the width between the pedals to be approximately that of a conventional chain driven bicycle. This transmission is particularly well suited for use in recumbent front wheel drive bicycles and tricycles.
    Type: Grant
    Filed: May 8, 1986
    Date of Patent: January 5, 1988
    Inventor: Dirck T. Hartmann
  • Patent number: 4674358
    Abstract: A vehicular transmission in which a multiple speed manual transmission of the two parallel shaft type has an auxiliary transmission connected in series between the two shafts for some of the multiple speeds. The auxiliary transmission providing a high speed and a low speed. The auxiliary transmission includes gearing for providing the high or low speeds to the gears on one of the shafts. A hydraulic clutch and a one-way clutch in said auxiliary transmission selectively connect the high or low speed gearing, with the one-way clutch engaging when the hydraulic clutch is disengaged and being overrun when the hydraulic clutch is engaged.
    Type: Grant
    Filed: September 18, 1986
    Date of Patent: June 23, 1987
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Sadanori Nishimura
  • Patent number: 4566655
    Abstract: A two-speed drive for a fishing reel wherein a low friction clutch is interposed between the drive shaft and the high speed main drive gear. Planetary gears extend from one side of the main drive gear and are engaged by the secondary drive gear so that, in the event the low friction clutch slips, the main drive gear will be driven by the smaller secondary drive gear through orbital rotation of the planet gears.
    Type: Grant
    Filed: November 9, 1984
    Date of Patent: January 28, 1986
    Assignee: Charles C. Worth Corporation
    Inventor: John N. Young
  • Patent number: 4539856
    Abstract: An auxiliary transmission unit having multiple countershafts is disclosed for use in a motor vehicle. The countershafts are disposed about an input sun gear and an output sun gear in such a manner as to provide an opening for a shift fork to reach a central shift mechanism locating the planet gears, one with respect to the other, at angular alignment positions in an unequally spaced manner. A tooth of one sun gear at an alignment position will be aligned with a tooth of the other sun gear at least once during one revolution of a countershaft. The unequal spacing of the countershafts provides reduced height for the auxiliary transmission housing.
    Type: Grant
    Filed: September 23, 1983
    Date of Patent: September 10, 1985
    Assignee: Doug Nash Equipment & Engineering
    Inventor: Barry L. Frost
  • Patent number: 4493223
    Abstract: A gear shifting speed change apparatus for a rotary electric tool such as a drill having an electric motor driving a first pair of unequal diameter pinion gears which are in continuous driving engagement with a second pair of pinion gears. The gears of second pair are independently mounted next to each other for free rotation on a shaft having an axial keyway. An axially sliding key is manually shifted to engage either one, but not both, of the second pair of gears by means of a pair of projections extending radially outwardly from the sliding key, one projection being axially outside the outer face of each gear and engageable with a recess in the outer face of the adjacent gear.
    Type: Grant
    Filed: September 8, 1982
    Date of Patent: January 15, 1985
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Ichiro Kishi, Hisao Nakagawa
  • Patent number: 4485692
    Abstract: An auxiliary transmission is provided for a light and medium duty truck having manual transmissions. The auxiliary transmission is an electrically actuated two speed gear system to be installed between the clutch and manual transmission for providing a direct pass through of engine rpm or for providing overdrive or underdrive depending on the gear set design.
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: December 4, 1984
    Inventors: Jeff D. Moore, Eddie C. Moore
  • Patent number: 4311067
    Abstract: The device is so designed as to be cheap enough to be sold in large numbers and is particularly simple, compact and has a very low power consumption. It comprises a hydrokinetic converter and a gear mechanism having two forward speeds established by means of two pairs of pinions. It is completed by two clutches and a free-wheel disposed in the converter which provide the connection with the two input elements of the mechanism. These two clutches are actuated by a single slidable plate which moves as a function of parameters such as the speed of the vehicle or the load on the engine. The two clutches are disposed on opposite sides of the plate and one clutch is connected in parallel with the free-wheel.
    Type: Grant
    Filed: November 2, 1979
    Date of Patent: January 19, 1982
    Assignees: Automobiles Peugeot, Societe Anonyme Automobiles Citroen
    Inventor: Armand Froumajou
  • Patent number: 4291587
    Abstract: In a multistage speed change gear system including a plurality of gears selectively interconnecting an input shaft and an output shaft located parallel to one another, the gears disposed concentric with the input shaft are supported by ball-and-roller bearings supported by at least one stationary member which is an entity separate from the input shaft. By this arrangement, relative movements occur between inner and outer races of the ball-and-roller bearings when a rotational force is transmitted from the input shaft to the output shaft, thereby preventing or reducing the development of fretting corrosion in the ball-and-roller bearings.
    Type: Grant
    Filed: July 6, 1979
    Date of Patent: September 29, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Keiji Tachibana, Masatosi Terasaki, Yoshihiko Nakayama, Junichi Kaneko
  • Patent number: 4279178
    Abstract: A power transfer case for a four wheel drive land cruiser is altered to provide overdrive capability. A main drive gear is journaled for rotation about a main drive shaft driven by the vehicle transmission system. The main drive gear includes an axially extending hub section. A direct drive gear is splined onto the main drive shaft, as is an overdrive driving gear. An overdrive idler gear provides a mechanical speed advantage and is engaged with an overdrive driven gear that is journaled for rotation about the main shaft. A shift collar is splined in continuous engagement with the hub section of the main drive gear, and is longitudinally shifted to alternatively effectuate splined engagement with either a direct drive gear or with an overdrive driven gear. The vehicle is provided with four wheel overdrive drive capability without axial relocation of any of the major structural drive line supports or assemblies.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: July 21, 1981
    Assignee: Todd Overdrive Company
    Inventor: William Todd