Spur Patents (Class 74/363)
  • Patent number: 9194461
    Abstract: A shifting device for a transmission unit of a vehicle, in particular a vehicle that is driven by muscle force. The transmission unit has a first shaft, which is formed as a hollow shaft, on which a plurality of free gears is mounted. The free gears are in engagement with a corresponding plurality of gearwheels, which are mounted on a second shaft, wherein the free gears are connectable to the first shaft by selecting devices. The selecting devices can be actuated by a camshaft arranged coaxially in the first shaft, wherein the camshaft is connected to a driving device in order to be rotated relative to the first shaft to actuate the selecting device.
    Type: Grant
    Filed: January 13, 2014
    Date of Patent: November 24, 2015
    Assignee: Pinion GmbH
    Inventors: Michael Schmitz, Christoph Lermen
  • Patent number: 9163702
    Abstract: A shifting device for a transmission unit, in particular for a vehicle which is operated by muscle force is disclosed. The shifting device has a first partial transmission and a second partial transmission, which are connected in series for power transmission. The selecting devices of the first partial transmission are designed as selectable free-running clutches and the second partial transmission has a plurality of selectable gear stages. During shifting from a highest stage of the gear stages of the first partial transmission to a lowest stage of the gear stages of the first partial transmission, the free-running clutches of the two gear stages are actuated simultaneously, and a load change between the corresponding free-running clutches allows a shifting operation of the second partial transmission to a higher stage of the gear stages.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: October 20, 2015
    Assignee: Pinion GmbH
    Inventors: Michael Schmitz, Christoph Lermen
  • 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: 7311016
    Abstract: The present invention is a method and apparatus for locking a vehicle transmission where at least one directional clutch gear is located on one end of a shaft and a second directional clutch gear and a park flange are located at the other end of the shaft. A single clutch is selectively moved between the at least one directional clutch gear, the second directional clutch gear, the park flange and a neutral position between the two ends of the shaft. The transmission is locked when the single clutch is engaged with the park flange as the flange is secured to the transmission housing.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: December 25, 2007
    Assignee: Dana Corporation
    Inventors: Charles R. Busch, Allan E. Geyer, Benjamin D. Peverly, Michael F. Ryan
  • Publication number: 20020144564
    Abstract: A gearbox structure of a beach cycle includes a gearbox which may transmit a power of an engine to a power shaft and a propeller shaft. A clutch mounted between the change gears of the gearbox can be shifted by a gear shift device into a neutral position, a reverse gear position and a forward gear position. The gear shift device includes a gear lever which rotates a sector-shaped gear which rotates a gear shift cam shaft which is formed with a slot for driving a gear shift drive fork which shifts the clutch to the neutral position, the reverse gear position, and the forward gear position. The gearbox is further provided with a force increase gear, and the propeller shaft is additionally provided with a drive gear which meshes with a helical gear of a distance calculator which has a connecting line externally connected to an odometer.
    Type: Application
    Filed: April 6, 2001
    Publication date: October 10, 2002
    Inventor: Tai-Yang Luh
  • Patent number: 6357312
    Abstract: A gear wheel construction for use in a constant mesh gear box, the gear wheel construction characterized by a single gear wheel (100) provided about a shaft (18) in a rotatable and engageable manner, the gear wheel (100) being divided longitudinally (axially) into two components, the first being a synchro-gear wheel (102) and the second gear being a partially toothed gear wheel (104), wherein the synchro-gear wheel (102) is provided in constant mesh with a gear wheel (106) forming its gear wheel pair whilst the partially toothed gear wheel (104is meshed therewith intermittently during rotation, the synchro-gear wheel (102) and the partially toothed gear wheel (104) having provided therebetween at least one biasing means (108) allowing momentary asynchronous rotation therein.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: March 19, 2002
    Assignee: PreLoad International Limited
    Inventor: William Wesley Martin
  • Patent number: 6151979
    Abstract: The present invention includes a passive shifting apparatus for a marine winch having a plurality of gears thereon. The passive shifting apparatus permits the winch to be rotated in either a clockwise or counter-clockwise direction, and comprises a central shaft about which the gears rotate, supported on a base in a marine winch housing. A rotatable curvilinear cam is mounted on the shaft. A radially inwardly and outwardly movable cam follower is engaged against the curvilinear cam. A first spring is arranged between the housing and the cam follower to bias the cam follower against the curvilinear cam. A second spring is arranged between the housing and the cam follower to bias the cam follower on the inner end of the shift arm when the cam is counter rotated. The cam follower may then move into and out of a slot in the curvilinear cam, and the cam may be able to rotate either clockwise or counter-clockwise without locking-up the cam follower.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: November 28, 2000
    Inventor: Paul D. Cavanagh
  • Patent number: 5462148
    Abstract: In a vehicle multi-ratio transmission comprising a plurality of change-speed gear trains, including a backward directional gear train, with which synchronizer clutches are associated for actuating same, two multidisc-type synchronizer clutches (12) are employed for actuating one of forward directional gear trains, which is operated under a heavy condition, and for actuating the backward directional gear train. Cone-type synchronizer clutches (11) are employed for actuating the other gear trains. Seizing of clutch members as well as an unexpected start of the vehicle at a neutral condition of the transmission are well prevented and increase of cost for securing these advantages is suppressed.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: October 31, 1995
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Toshiro Azuma, Yasuo Seno, Hiroshi Kitagawara, Shusuke Nemoto
  • Patent number: 5303605
    Abstract: An automatic transmission for mounting within the rear fork of a bicycle includes a plurality of pairs of constant mesh gears and a plurality of discs. Each disc is concentric with one of the gears in each pair and includes a notch for partially enclosing a centrifugally actuated pawl. The notches in adjacent discs face in opposite directions and all the discs but one include a spring for opposing the centrifugal force on each pawl to keep each pawl in a disengaged position. The one disc includes a spring for holding the pawl in an engaged position. The pawls are shaped to permit the bicycle to coast or freewheel.
    Type: Grant
    Filed: February 5, 1993
    Date of Patent: April 19, 1994
    Assignee: Automatic Bicycle Co.
    Inventor: David S. Douglass
  • Patent number: 5269194
    Abstract: A thrust washer combination employing three thrust washers (28, 70 and 72) is provided for maintaining separation between and for transferring axial thrust to a mainshaft (2) that has been imparted to either one adjacent floating mainshaft gears (12, 18) of a change gear transmission (100) respectively by a clutch assembly (20) or (22) during the process of selectively clutchingly engaging one of gears (12, 18) to the mainshaft to effect the rotation thereof. Gears (12) and (18) have respective adjacent flanges (42) and (44) that extend towards mainshaft (48) with thrust washer (28) being contained in an annular groove (42) therebetween and keyed for rotation with mainshaft (2) and thrust washers (70) and (72) positioned on opposite sides of flanges (40, 42) and held thereagainst by retaining rings (74) and (76) respectively.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: December 14, 1993
    Assignee: Eaton Corporation
    Inventor: Joseph D. Reynolds
  • Patent number: 5226338
    Abstract: A vehicle compound change gear transmission is provided that features an auxiliary drive gear (24) carried by a mainshaft (20) having enhanced freedom of radial movement by eliminating all radial contact between a bearing member that resiliently supports mainshaft (20) for rotation relative to a stationary housing of the transmission by utilizing prescribed spacer member combinations.
    Type: Grant
    Filed: July 6, 1992
    Date of Patent: July 13, 1993
    Assignee: Eaton Corporation
    Inventors: Joseph D. Reynolds, Alan C. Stine, David O. Thompson
  • Patent number: 5207768
    Abstract: An improved elongate key (92) is provided for securing thrust washers to a mainshaft (48) of a transmission (100). Key (92) has a substantially triangular cross-sectional configuration having rounded intersections between adjacent surfaces rendering it easily insertable axially through keyways defined between external axially extending grooves (66) in mainshaft (48) and aligned internal grooves (86) in the thrust washer which itself is preferably provided with rounded corners (90) to enhance the strength thereof.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: May 4, 1993
    Assignee: Eaton Corporation
    Inventor: James D. Gluys
  • Patent number: 5149308
    Abstract: A transmission comprising a change speed mechanism and a differential housed in a transmission case. The change speed mechanism includes drive gears mounted on a transmission shaft, and driven gears meshed with drive gears. The differential includes a differential case having elongated axle-bearing bosses extending to inside walls of the transmission case. The driven gears are mounted on one of the elongated bosses to be rotatable therewith. The differential case is supported by rear wheel axles extending through the transmission case and the elongated bosses.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: September 22, 1992
    Assignee: Kubota, Ltd.
    Inventors: Norimi Nakamura, Tadao Adachi, Akio Matsui, Kouji Fujiwara, Mitsugu Kobayashi, Tetsuo Yamaguchi, Minoru Fukuda
  • Patent number: 5099712
    Abstract: An automatic transmission having a plurality of driving gears which are individually and selectedly placed in driving engagement with a drive shaft dependent upon the speed of rotation of the drive shaft. The method of automatically engaging and disengaging the drive coupling between a drive gear and the drive shaft is such as to permit the drive shaft to free wheel whenever the rotation of the drive gear is retarded or stopped. The releasable coupling is achieved by centrifugally actuated pawls which selectedly engage in detent notches about the inner diameter of the drive gears and which pawls automatically retract and disengage from these notches when the drive gears are retarded or stopped.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: March 31, 1992
    Inventor: David S. Douglass
  • Patent number: 5097717
    Abstract: A gear shift transmission for a motor vehicle has a transmission housing which comprises an axle housing, an intermediate plate and a housing bell. The input shaft and the output shaft of the gear shift transmission are supported in three places, specifically in a front bearing plate of the axle housing, in the intermediate plate, and in a rear bearing plate of the housing bell. The reverse gear and the lower forward gears are arranged in the axle housing, and the higher forward gears are arranged in the housing bell.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: March 24, 1992
    Assignee: Dr. Ing. h.c.F. Porsche AG
    Inventor: Meinrad Bardoll
  • Patent number: 4949589
    Abstract: A twin countershaft transmission (100) is provided having axially adjacent floating mainshaft gears such as referenced by numerals (30) and (32) whose axial thrust when engaged is transmitted to the mainshaft (48) rather than to the adjacent gear by means of gears (30) and (32) having respective flanges (42) and (44) that extend radially inwardly between their axially spaced-apart thrust washers (46, 50, 52) splined to mainshaft (48).
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: August 21, 1990
    Assignee: Eaton Corporation
    Inventor: Joseph E. Reynolds
  • Patent number: 4922599
    Abstract: An improved transmission for a Volkswagen brand of automobile which has five forward speeds rather than the stock four forward speeds. The transmission uses the vast majority of the parts of the four speed transmission but modifies the four speed transmission by extending the main shaft and the pinion shaft by threading shaft extensions onto the end of both of these shafts. In addition, a new gear carrier housing of greater length and a new nose cone of shorther length are substituted for the original gear carrier housing and nose cone. The method of making this conversion is also described.
    Type: Grant
    Filed: January 9, 1989
    Date of Patent: May 8, 1990
    Inventor: Mark Durfee
  • Patent number: 4901600
    Abstract: A control for an extended range splitter type compound transmission (10) comprising a main transmission section (12) connected in series with a splitter type auxiliary transmission section (14) connected in series with an extended range section (15) is provided. The main section shift lever (72) has a first (1) and a second (1E) position for selection of low ratio (50). Selection of the second position (1E) will automatically cause the extended range section clutch (206) to be shifted to the speed reduction position thereof.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: February 20, 1990
    Assignee: Eaton Corporation
    Inventor: Derek R. Wilson
  • Patent number: 4771648
    Abstract: A change-speed transmission for a motor vehicle which includes as input shafts a central shaft supported in an intermediate plate of the transmission housing and a hollow shaft supported on the central shaft near the intermediate plate. An output shaft for the axle drive is supported in the transmission housing parallelly to the input shafts. The transmission housing is constructed two-partite or three-partite whereby a separating plane extends within the area of the intermediate plate and parallel thereto. A first group of transmission speeds is coordinated to the central shaft and is located on one side of the intermediate plate, while a second group of transmission speeds coordinated to the hollow shaft is located on the other side of the intermediate plate.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: September 20, 1988
    Assignee: Dr. Ing h.c.F. Porsche Aktiengesellschaft
    Inventor: Meinrad Bardoll
  • Patent number: 4713983
    Abstract: A transmission, especially for use with small tractors and the like, provides a number of higher speed drives, typically associated with mowing, and a number of extremely slow "creep" speed drives to make said tractor more compatible with snow blower and tiller implements. All speed drives are available in a single range with each being selected sequentially by movement of a single gearshift lever. A unique reduction train exploits one or more higher speed drives to drive the "creep" speed pinions and a safer reverse speed drive at reduced rotational speed. The extremely wide speed ratio range will also dismiss the smallest pinions and severe speed increasing drives presently employed in these transmissions to greatly increase capacity and to reduce costs.
    Type: Grant
    Filed: January 14, 1987
    Date of Patent: December 22, 1987
    Inventor: Kenneth P. Rundle
  • Patent number: 4674346
    Abstract: A rotatable reverse gear is supported on a counter shaft. A member rotates and stops as an output shaft rotates and stops respectively. A device matches the rotational speed of the reverse gear to the rotational speed of the member when a transmission is shifted toward its reverse position.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: June 23, 1987
    Assignee: Nissan Motor Company, Limited
    Inventor: Kazuyoshi Hiraiwa
  • 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: 4669326
    Abstract: A transmission for an automobile including a main shaft driven by and concentric to a main drive shaft driven by an engine and a counter shaft arranged in parallel with the main shaft according to the invention comprises change gears mounted on the main shaft between two bearings journaling the main shaft in the order of higher and lower speed gears and an overdrive gear. Diameters of journals of the main shaft for these gears are stepwise enlarged in the order of the journals for the higher and lower speed gears. The overdrive gear is integrally formed on the main shaft on a side of an end of the journal for the lowest speed gear remote from the higher speed gear. The transmission is easy in assembling and manufacturing and rigid and compact in construction.
    Type: Grant
    Filed: January 29, 1980
    Date of Patent: June 2, 1987
    Inventor: Tamio Kawamoto
  • Patent number: 4662242
    Abstract: A transaxle includes a multi-stage final drive assembly with the final drive assembly with a plurality of serial stages. The transaxle has an input, a plurality of gear sets selectively engageable for directing power from the input to the first stage of the final drive assembly, and another gear set engageable for directing power from the input to another stage of the final drive assembly thereby by-passing the first stage thereof.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: May 5, 1987
    Assignee: Borg-Warner Automotive, Inc.
    Inventors: Robert W. Atkinson, Jack M. Fisher
  • Patent number: 4656882
    Abstract: By making the ratios of the gear pairs in a conventional single countershaft transmissions a particularly defined sequence, and mounting the gear elements that are not affixed to the countershaft so that, that of the first gear pair is free to rotate on and couplable to the input shaft, that of the second gear pair is free to rotate on the output shaft and couplable to both the input and output shafts, with those of the remaining pairs free to rotate on and couplable to the output shaft, the number of ratios in the transmission will be enhanced by a factor of two (2) and the continuum will be in a particular geometric progression. By extending the particularly defined ratio sequence to a series arrangement of similarly constructed gearboxes, the number of continuum ratios in the resulting transmission will be enhanced by a factor of three (3) to five (5) and the continuum will again be of the same geometric progression.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: April 14, 1987
    Inventor: John H. Kerr
  • Patent number: 4635495
    Abstract: A multi-speed power transmission utilizing ten gears, seven clutches and four shafts provides eight forward speeds and four reverse speeds. The transmission is coaxial in that the input and the output shafts are on the same centerline. The transmission requires only a minimum number of gears, clutches and shafts for the large number of gear ratios provided, and at the same time it is relatively compact and has only three shaft centers. In this transmission there are always three clutches applied in any speed range. Of the seven shifts between forward speed ranges, four of them require the engagement of one different clutch only, two of them require two different clutches to engage simultaneously, and one shift requires engaging three different clutches. The clutches are of the type having multiple friction plates, and hydraulically applied force pistons which are spring load returned. The clutches include appropriate ball dump valves in the force pistons.
    Type: Grant
    Filed: October 18, 1985
    Date of Patent: January 13, 1987
    Assignee: Twin Disc, Incorporated
    Inventor: Basil White
  • Patent number: 4614126
    Abstract: A power synchronizer assembly (10) for selectively increasing the rotational speed of a mechanical change gear transmission (12) input shaft (22), main section countershaft (58) and ratio gears (82, 84, 86, and 88) independently of the rotational speed of the drive engine (14) is provided. The power synchronizer assembly includes a sun gear shaft (174) drivingly associated with the main section countershaft and carrying a sun gear (176) fixed thereto which is in constant engagement with the planet gears (180) of a planet gear carrier (178) rotatably driven by the transmission output shaft (28). A ring gear (182) surrounds and is in constant engagement with the planet gears and is selectively frictionally coupled for rotation with the transmission housing (68) by means of a band brake and band brake operating mechanism (186 and 188).
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: September 30, 1986
    Assignee: Eaton Corporation
    Inventors: Stephen A. Edelen, Timothy J. Morscheck
  • Patent number: 4611504
    Abstract: A transaxle especially for use with small tractors, power equipment and the like wherein a range transmission is incorporated within a speed transmission to provide a unique drive that provides three forward and one reverse normal speed drives and two or three forward creep speed drives of extreme reduction ratio. Also shown, in variation, is a planetary epicyclic gear train that replaces the reverting gear trains currently employed in these transaxles to provide for more compact and economical construction. In one variation a friction drive clutch is contained within the transaxle receiving an input from a primary reduction gear and providing an input to the speed transmission mainshaft.
    Type: Grant
    Filed: July 5, 1984
    Date of Patent: September 16, 1986
    Inventor: Kenneth P. Rundle
  • Patent number: 4606236
    Abstract: A synchronizer is the type which has a hub having a boss at a central portion thereof, a sleeve axially slidably engaged with the hub with splines, synchronizer keys provided between the hub and the sleeve, and a synchronizer ring provided on one side of the hub. An annular cover plate has axially projected projections and an axially projected lug. The cover plate is secured to the hub at the other side, engaging the projections with the periphery of the boss and the lug with a hole provided in the boss, thereby preventing the keys from disengaging from the synchronizer.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: August 19, 1986
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Toshio Kobayashi, Shinichirou Mura
  • 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: 4503727
    Abstract: A transmission shift mechanism having straight line movement. The shift control operates a single shift rail carrying two shift forks to provide three speeds and a neutral position.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: March 12, 1985
    Assignee: Allis-Chalmers Corporation
    Inventor: Gerardus M. Ballendux
  • Patent number: 4399717
    Abstract: To selectively provide multi-speed two-wheel drive, multi-speed four-wheel drive and low-speed high-torque four-wheel drive, a change-speed gearing for a motor vehicle includes a rear output shaft coaxial with a front output shaft, a clutch hub fixed to the rear end portion of the front output shaft adjacent to the front end of the rear output shaft, a first hub sleeve axially slidable on the clutch hub to be shifted toward the front end of the rear output shaft to connect the front and rear output shafts, a speed-reduction driven gear freely rotatable on the front output shaft adjacent to the clutch hub and in meshing engagement with a counter gear fixed to a countershaft, and a second hub sleeve axially slidable on a hub portion of the driven gear to be shifted toward the clutch hub after the first hub sleeve is shifted.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: August 23, 1983
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Masayoshi Funato, Katunori Watanabe
  • Patent number: 4301690
    Abstract: A gear shifting mechanism comprising a drive shaft with a plurality of freely rotatable gears mounted thereon and means for making driving connection between the drive shaft and any one of the gears. Then through the operation of means actuated by limited reverse rotation of the drive shaft, the connection of the drive shaft is shifted to a second gear while the first gear is released. The shifting of the connection of the drive shaft successively to all of the other gears is accomplished in the same manner, namely, by stopping the drive shaft and reversing its rotation through a limited angle which movement actuates means for connecting the next gear to the drive shaft while releasing the previously connected gear. This procedure is continuously repeated, shifting the connection with the drive shaft progressively through all of the gears in a predetermined sequence and then returning the connection to the first gear.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: November 24, 1981
    Inventor: Paul D. Cavenagh
  • 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
  • Patent number: 4038882
    Abstract: An axially short, variable-ratio gear transmission suitable particularly for motorcycles has a first or input shaft, a second or output shaft, and a countershaft. First and second rotatable gears on the input shaft permanently mesh with respective first and second rotatable gears on the output and counter shafts. The first and second gears on the countershaft are permanently connected for joint rotation, a first coupling permits one of the two gears on the first shaft to be coupled to the first shaft, and a second coupling similarly may couple one of the gears on the second shaft to the latter.
    Type: Grant
    Filed: September 18, 1975
    Date of Patent: August 2, 1977
    Assignee: Fichtel & Sachs A.G.
    Inventor: Dieter Keller
  • Patent number: 4019400
    Abstract: A transmission is provided having a housing, a power input shaft rotatably mounted at one end, a power output shaft rotatably mounted at the other end coaxially with the power input shaft, a splined clutch member affixed to the end of one of the shafts having a gear engaged over a portion thereof, a second splined clutch member freely rotatably mounted on the other shaft and having a gear engageably mounted over a portion thereof, the end of each clutch-engaging member extending beyond each gear, a splined countershaft rotatably supported in the housing and having a gear engaged at each end engaging the gears mounted on the power input and output shafts, a third splined clutch member affixed to one of the shafts and positioned intermediate the first and second splined clutch members and of the same diameter as said clutch members, a clutch sliding ring or coupling member mounted over the cylindrical clutch member having a splined bore engaging the third clutch member and axially slidable with respect thereto
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: April 26, 1977
    Inventor: James M. Stump
  • Patent number: 3968704
    Abstract: A power transfer mechanism incorporated in a multiple path drive system includes a transfer case disposed between a source of input torque and at least one drive axle. The transfer case has a pair of parallel drive trains including a gear drive train and a chain drive train, and means for selectively engaging one of the drive trains as desired to provide power transfer. A sprocket in the chain drive train serves as one of the gears in the gear drive train.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: July 13, 1976
    Assignee: Borg-Warner Corporation
    Inventor: Mark J. Fogelberg
  • 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