Patents Examined by Lance Chandler
  • Patent number: 4193322
    Abstract: A casing for a power transmission unit for an automotive vehicle of the type including a clutch coupled to a crankshaft of an engine, a change-speed gearing drivingly connected to the clutch, and a differential gear assembly drivingly connected to the change-speed gearing for driving a pair of wheels of the vehicle. The casing consists of a transaxle case and a transmission case. The transaxle case has a first portion attached to the rear end face of the engine and a second portion extending forwardly below the engine. The clutch is disposed in a first chamber defined by the first position of the transaxle case and the differential gear assembly is disposed in a second chamber defined by the second portion. The transmission case is attached to its rear end of the transaxle case for enclosing the change-speed gearing.
    Type: Grant
    Filed: February 14, 1978
    Date of Patent: March 18, 1980
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Hideki Morino, Yasuyoshi Yasui
  • Patent number: 4192203
    Abstract: A constant meshed, infinitely variable gear ratio transmission using relatively low pressure, low volume hydraulic systems to control the transmission gear ratio. The transmission includes a gear box having an input and output shaft. The gear box houses two sets of planetary gears which couple the input and output shafts together. A pinion gear is fixed to each shaft. A set of planetary gears mesh with each pinion and a plurality of planetary gear shafts connect the corresponding planetary gears of each pinion together. A cage is rotatably supported in the housing. A first hydraulic system controls the rotation of the cage. A second and independent hydraulic system controls the rotation of the planetary gear shafts by selectably controlling the rotation of the cage and the rotation of the planetary gear shafts so that the gear ratio for the transmission may be intermediately selected.
    Type: Grant
    Filed: February 1, 1978
    Date of Patent: March 11, 1980
    Inventor: Alvin Dailey
  • Patent number: 4192202
    Abstract: Apparatus for controlling the closing limit of a carburetor throttle valve in a motor vehicle having an automatic transmission with a shift control that includes a governor producing a speed-dependent pressure. The apparatus comprises a vacuum-actuated device for varying the closing limit of the throttle valve in dependence upon the vacuum applied thereto; a vacuum line connecting the vacuum actuated device with a source of intake manifold vacuum downstream of the throttle valve; a hydraulic or solenoid valve arranged in the vacuum line for controlling the vacuum transmitted by the line; and a hydraulic or electrical circuit for controlling this valve in dependence upon the speed-dependent pressure produced by the governor.
    Type: Grant
    Filed: October 19, 1977
    Date of Patent: March 11, 1980
    Assignee: Volkswagenwerk Aktiengesellschaft
    Inventors: Reinhard Gospodar, Paulus Heidemeyer
  • Patent number: 4191060
    Abstract: A car side window glass lifting mechanism is disclosed, in which the problem of pre-tensioning the operative wire in a mechanism of the single-shaft, wire-actuated type, is solved by the provision of a rupturable dowel properly located on the wire-winding drum. Means are also provided to stop the motion of a reducing gear which is intended for providing a correct relationship between the gearwheel of the gear in order to obtain a correct positioning of the active component parts as a function of the position of the glass window within its window frame.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: March 4, 1980
    Inventor: Terenzio Sessa
  • Patent number: 4191072
    Abstract: A transmission which includes a hydrodynamic torque converter provided in the input side of a stepped gear transmission shiftable under load. The stator of a retarder is connected directly to a housing cover and a counterpressure valve, a lubrication pressure valve and a further valve for controlling the flow of the hydrodynamic unit and of the retarder are provided on this housing cover as well.
    Type: Grant
    Filed: December 14, 1977
    Date of Patent: March 4, 1980
    Assignee: Zahnradfabrik Friedrichshafen AG
    Inventors: Friedrich J. Ehrlinger, Horst Bock
  • Patent number: 4191070
    Abstract: There is described a transmission arrangement wherein a substantially steady-state power source drives an input shaft. The output shaft is selectively driven by gear arrangements between the input and output shafts. The output shaft is driven and accelerated as a function of retardation which is supplied to the gear arrangement between the input and output shafts.
    Type: Grant
    Filed: March 31, 1978
    Date of Patent: March 4, 1980
    Inventor: Chester L. McKinniss
  • Patent number: 4191069
    Abstract: To obtain a large number, in excess of 1000, of different speeds for a thread carriage driven by the warp cylinder of a sectional warping machine a multi-speed gear transmission is provided which has two gear mechanisms, each with several gear ratios, interposed between drive input and output shafts of the transmission, the two gear mechanisms being mechanically connected in parallel with the drive input shaft and driving respective crown wheels of a differential gear the planet carrier or spider of which is in turn mechanically coupled to the transmission output shaft.
    Type: Grant
    Filed: May 5, 1978
    Date of Patent: March 4, 1980
    Inventor: Luigi Sasso
  • Patent number: 4188837
    Abstract: The system permits selective combining of one of a plurality of prime movers with a plurality of propeller shafts by means of a transverse chain drive between the propeller shafts to enable efficient multi-screw ship operation with one engine.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: February 19, 1980
    Inventor: Wilfrid H. Bendall
  • Patent number: 4188831
    Abstract: An automatic transmission is provided in which the torque from the motor is converted and coupled to the load via n (typically n=3) intermediate mechanisms, each delivering power to the load with a constant phase difference of between successive deliveries. Three different intermediate mechanisms consisting of springs, springs and a crankshaft, and levers with variable lever arms are provided. These systems have no frictional or hydraulic or other dissipative clutch mechanisms, and are regenerative in that power not delivered to the load goes back to the motor. Also, there are no discrete gears, and as the torque required by the load varies, the torque conversion is accomplished automatically and continuously as if an infinite number of gears were provided. The system also has infinite gear ratio capability in reverse as well as in forward direction.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: February 19, 1980
    Inventor: Ahmad Amjadi
  • Patent number: 4187741
    Abstract: An inertia balanced, power regenerative transmission system for vehicles augments the power of the prime mover to the transmission output shaft during acceleration and recovers power from the drive shaft during deceleration. The transmission system includes torque sensitive gearing subsystems for transferring power intermediate a flywheel, the prime mover and the drive shaft. A decrease in rotational velocity of the prime mover output shaft and an accompanying decrease in kinetic energy of the vehicle is inherently coupled to increase the rotational speed and attendant kinetic energy of the flywheel, which energy is immediately available upon renewed acceleration of the vehicle.
    Type: Grant
    Filed: January 3, 1977
    Date of Patent: February 12, 1980
    Inventor: Bengt E. Nyman
  • Patent number: 4186626
    Abstract: A wheel final drive assembly for vehicles, wherein the assembly includes a two stage or double reduction planetary gearing mechanism positioned within wheel hubs and connected to the vehicle drive wheels, a drive axle shaft for interconnecting a vehicle power train differential and the gearing mechanism, a separable part hollow hub having positioning faces contacting and axially positioning gears of the mechanism, a hollow spacer plug insertable through the hollow hub and having a face contactable with the outer end of the axle shaft to operatively position the axle shaft, removal of the plug permitting movement of the axle shaft through the hollow hub to an inoperative position in the assembly, and partial stowing therewithin or complete removal therefrom.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: February 5, 1980
    Assignee: Caterpillar Tractor Co.
    Inventor: Richard W. Chamberlain
  • Patent number: 4186624
    Abstract: A drive mechanism in which rotary power is supplied in sequence to one output shaft and then to another, the desired arrangement of one input and two outputs being provided by a planetary transmission. Each output shaft is connected to a set of notched cams that rotate at different speeds as the output shaft turns. When the notches of a set of cams become aligned, they are engaged by a pawl that arrests the associated output shaft while simultaneously releasing the other output shaft.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: February 5, 1980
    Assignee: Western Gear Corporation
    Inventor: Donald J. Fessett
  • Patent number: 4185521
    Abstract: A hydraulic circuit adjusts an infinitely variable drive ratio hydro-mechanical transmission in response to movements of operators speed and torque controls to enable precise selection of the wheel torque of a vehicle and selective variation of ground speed by changing drive ratio while the driving engine operates at a constant engine speed. Control fluid from a pump driven by the engine is used to generate a displacement signal for the hydrostatic section of the transmission. The displacement signal is limited to a value determined by an operators maximum speed selector while being modulated within that limit by means which compare actual output torque with a selected torque signal from the operators controls and which vary the displacement signal to conform output torque with that called for by the operator. The displacement signal is further modified when necessary by engine underspeed and overspeed sensing means responsive to variations in control fluid flow from the pump.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: January 29, 1980
    Assignee: Caterpillar Tractor Co.
    Inventor: Charles E. Beals
  • Patent number: 4185509
    Abstract: The invention contemplates an improved mechanical traction drive providing a single control whereby a desired range of speed ratios between input and output shafts is selectively available, without requiring clutch connection to the power source, such as an internal-combustion engine. The transmission involves a combination of completely mechanical friction-roller and meshing-gear planetary systems which are connected at all times, whether the single control is operated to call for a forward drive, a stop or a reverse drive of the output shaft. For the particular disclosed forms, provision is made for automatic downshifting reaction to increasing load, and major axial-reaction forces are self-contained by rotating mechanism, thus (a) avoiding substantial axial force components on main-bearings of the mechanism, and (b) reducing to very small magnitudes the requisite force for selective control actuation.
    Type: Grant
    Filed: June 29, 1978
    Date of Patent: January 29, 1980
    Assignee: Textron Inc.
    Inventor: Daniel R. McLarty
  • Patent number: 4184388
    Abstract: An infinitely variable speed transmission is disclosed in which, in a preferred embodiment, a drive shaft is connected to an adjustable drive spoke disposed within a rotatable toothed wheel. The drive force received by the wheel from the input drive shaft is imparted to either a sun gear or a ring gear or both. A second ring gear may be axially secured to the first ring gear. A second sun gear may be axially secured to the first ring gear. A planetary gear engages second sun and ring gears and transmits force received by it to an output shaft. When the drive spoke adjustment causes the second ring gear, through the first ring gear, to become the driving gear the slowest output speed results. Intermediate arc settings of the spoke at any point along about a range results in both ring and sun gear driving the planetary gear simultaneously, but at an intermediate speed between the fastest and slowest setting.
    Type: Grant
    Filed: February 3, 1978
    Date of Patent: January 22, 1980
    Inventor: Albert Sfredda
  • Patent number: 4184387
    Abstract: A vehicle with an engine, a torque converter, planetary gearing sets operatively connected with the torque converter, running means on either lateral side operatively connected with the respective planetary gearing set, a turning drive mechanism with two output shafts to rotate in opposite directions with each other and switching over means for selectively switching over output rotation directions of the turning drive mechanism. The turning drive mechanism takes the driving power from input side of the torque converter and transmits the power to drive either sun gear or planetary gears of the planetary gearing sets, thus to cause differential rotary speeds of the running means on one side as compared with the other side. The vehicle can thus turn very sharply when it travels at slow speed.
    Type: Grant
    Filed: May 3, 1977
    Date of Patent: January 22, 1980
    Assignee: Kubota, Ltd.
    Inventors: Masaaki Kiritani, Mitsugu Kanai, Denzaburo Harada, Chikashi Nishida, Yoshiyuki Asanuma, Kenji Ikeda, Kouzi Masutani
  • Patent number: 4184385
    Abstract: An output split-type mechanical and hydraulic transmission includes input and output shafts, first and second differential gear mechanisms for establishing different input-output speed ratios, at least two clutch mechanisms for selectively cooperating with components of the differential gear mechanisms and the input and output shafts to establish different input-output speed ratio ranges, and first and second hydraulic pump motors. The first pump motor has a variable hydraulic capacity and is mechanically and drivably connected to the input shaft for establishing variations in the hydraulic capacity. The second pump motor is mechanically connected to at least one component of both the first and second differential gear mechanisms for establishing rotational speeds of the components of the differential gear mechanisms during the different input-output speed ratio ranges in relationship to the variations of the first pump motor's hydraulic capacity.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: January 22, 1980
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Hiroaki Maeda
  • Patent number: 4181036
    Abstract: Stepped-ratio gearing for motor vehicles incorporates a simplified arrangement for the noiseless engagement of reverse ratio, by the use of a synchronizing arrangement for one of the forward ratios.For this purpose a motion-transmitting member is connected to a shift member (for example a shift fork) and/or to a selector shaft and is effective during movement of this shift member and/or selector shaft to act upon a shift fork for a synchronized forward ratio to effect a movement of the shift fork to provide pre-synchronization, with braking of rotating elements of the stepped-ratio gearing for engagement of the reverse ratio, and thereby noiseless engagement of the reverse ratio.
    Type: Grant
    Filed: May 24, 1978
    Date of Patent: January 1, 1980
    Assignee: General Motors Corporation
    Inventor: Fritz Janke
  • Patent number: 4181040
    Abstract: Infinitely variable speed ratio gear drive with reversible output-end direction of rotation, featuring a mechanical power train and a further power train incorporating an infinitely variable and reversible torque transmitting unit which preferably comprises a hydrostatic pump and a hydrostatic motor. The two power trains are re-joined in a planetary gear train, with the mechanical power train delivering its power to the sun gear and the further power train delivering its power to the internal gear via an intermediate transmission and the planet carrier being connected to the output. A third power train with a hydrodynamic converter which also delivers its power to the internal gear can be provided in addition.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: January 1, 1980
    Assignee: Getrag Getriebe- und Zahnradfabrik GmbH
    Inventor: Hans Hofmann
  • Patent number: 4178815
    Abstract: A sealed torque transmission assembly comprising a casing having a drive shaft rotatably mounted to extend through a wall portion into the casing and terminate with an eccentric end portion which is parallel with the axis of rotation of the drive shaft. An externally toothed, non-rotating driving gear is mounted on a bearing on the eccentric end portion and held against rotation by an anti-rotation sleeve which is coupled by involute teeth at one to the casing and at the other end to the driving gear. A flexible bellows around the drive shaft seals the externally toothed, non-rotating drive gear to the casing. An internally toothed driven gear, having a greater number of teeth than the driving gear and teeth which mesh with at least one tooth of the drive gear, is mounted on a driven shaft which is also mounted for rotation in a wall portion of the casing.
    Type: Grant
    Filed: December 2, 1977
    Date of Patent: December 18, 1979
    Assignee: Atomic Energy of Canada Limited
    Inventor: Cyril J. Astill