Electrically Operated Patents (Class 74/365)
  • Patent number: 10274083
    Abstract: A connector in a clutch connection structure used in an electrical automobile, which includes: a locking part formed at a body; a latch in contact with the locking part; a first solenoid driving part disposed on one side of the latch; and a second solenoid driving part disposed on the other side of the latch, in which the first solenoid driving part and the second solenoid driving part face each other with the latch being interposed therebetween, such that an operation of a clutch when the clutch operates becomes simple, and thus, noise, vibrations, and durability thereof are improved.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: April 30, 2019
    Inventors: Young Min Seo, Choong Hee Rhew
  • Patent number: 9200707
    Abstract: A method for controlling a transmission includes using actuation of a button of a shift module to produce a signal representing a desired gear, using the signal and a second signal commanding a park range to determining a priority range, using a shift mechanism to attempt engagement of the transmission in the priority range, and if the priority range is park and park is not engaged, engaging a park brake.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: December 1, 2015
    Inventors: Todd C. Spaulding, Brian J. Deurloo, Mark E. Zyskowski, Christopher L. Danks, Matthew L. Fyie, Charles C. Poon, William R. Goodwin, Richard R. Hathaway
  • Patent number: 8245590
    Abstract: A device (1) for transmitting torque from a first shaft (2) to a second shaft (3) of a transmission device, in particular a counter shaft transmission. The device (1) has a first gear (5) supported on the first shaft (2) by a bearing device (4) and which, in an assembled state, engages a second gear (6) arranged on the second shaft (3). The first gear (5) can be shifted into an activated state in which the first gear is connected in a rotationally fixed manner to the first shaft (2). A supporting mechanism (18) is associated with the first gear (5), next to the bearing device (4), via which tilting moments present and acting on the first gear (5), at least in a connected state, are transmitted to and supported by the first shaft (2).
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: August 21, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Matthias Reisch, Mark Mohr, Ralf Dreibholz, Gerhard Gumpoltsberger
  • Patent number: 8167104
    Abstract: The invention relates to a gear shifting point (10) for producing a rotationally fixed connection between a toothed wheel (16, 18) and a shaft (12). Said gear shifting point (10) comprises a shaft (12), a sliding sleeve (24) and at least one toothed wheel (16, 18). The toothed wheel (16, 18) is mounted rotationally with respect to the shaft (12). The sliding sleeve (24) is mounted on the shaft (12) in such a way that it is not rotatable therewith. The toothed wheel (16, 18) and the sliding sleeve (24) are embodied in such a way that a rotationally fixed connection can be produced therebetween in the coupled state of the gear shifting point (10) and no connection can be produced between the toothed wheel (16, 18) and the sliding sleeve (24) in the neutral state of the gear shifting point (10).
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: May 1, 2012
    Assignee: Deere & Company
    Inventors: Nicolai Tarasinski, Rainer Gugel
  • Patent number: 8145399
    Abstract: Method and arrangement for providing an electronic gear shift selector associated with an automatic mechanical transmission for a heavy vehicle. The gear shift selector includes a toggle switch for asserting at least one gear shift request, a counter receiving the at least one gear shift request, and a time delay for preventing communication of the at least one gear shift request from the counter until a predefined time period has passed. A method for communicating a collective gear shift request to a gear box includes asserting one or more gear shift requests with a gear shift selector, communicating the gear shift requests to a counter, determining the collective gear shift requests occurring within a predefined time period, communicating the gear shift requests occurring within the predefined time period to a gearbox.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: March 27, 2012
    Assignee: Volvo Lastvagnar AB
    Inventors: Anders Lindgren, Anders Eriksson
  • Publication number: 20090066169
    Abstract: An actuator arrangement for the axial displacement of an actuation member by means of a drive force which is generated by an electric machine, in particular for a shift-clutch arrangement of a multi-step gear change transmission. The actuation member is mounted axially displaceably on a rotary shaft. The electric machine has a stator fixed to a housing and a rotor which is coupled to the actuation member and is arranged coaxially with respect to the actuation member. The rotor is coupled to the actuation member with a form fit in the axial direction. Here, the rotor or the actuation member has a radial projection which engages into a radial groove of the other part.
    Type: Application
    Filed: September 3, 2008
    Publication date: March 12, 2009
    Inventors: Mark Schweiher, Uli Christian Blessing, Thorsten Gatzka, Ulrich Knoedel
  • Patent number: 7350435
    Abstract: The invention relates to a method for determining the moving direction of a motor, especially an electric motor of a transmission actuating system for gear selection and/or shifting, whereby at least one signal of the motor is detected. The inventive method is characterized in that the moving direction of the motor is validated by means of the detected signal, on the basis of the feed direction. The invention also relates to a motor, especially a gear motor or a selector motor of a transmission actuating system, especially for carrying out the method, whereby at least one device is provided for validating the moving direction of the motor.
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: April 1, 2008
    Assignee: LuK Lamellen und Kupplungsbau Betelligungs KG
    Inventors: Hans-Juergen Renk, Klaus Henneberger, Martin Zimmermann
  • Patent number: 6230577
    Abstract: Shift control assembly for a power transmission device includes an electric drive motor and gear train having an output which is coupled to and bi-directionally rotates a shift rail. The shift rail includes a pair of spaced-apart cam followers. Freely rotatably receiving the shift rail and disposed thereon between the cam followers is a shift fork assembly. The shift fork assembly includes a body having a pair of spaced-apart helical cam surfaces engaged by the cam followers and a fork engaging a shift clutch collar. As the shift rail rotates bi-directionally, the shift fork assembly and clutch collar bi-directionally translate. A circular plate is disposed for rotation with the shift rail and includes an array of apertures. A plurality of sensors are disposed in adjacent, sensing relationship to the circular plate.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: May 15, 2001
    Assignee: BorgWarner Inc.
    Inventors: Dan J. Showalter, Carl Randall Vogt, John S. Sewell, Paul G. Kowaleski, Rodney E. Barr, Michael Wayne Miller, Thomas P. Knox, Richard K. Rader, Scott Wood
  • Patent number: 5765671
    Abstract: An electric power apparatus and a power transmitting apparatus of an electric vehicle are each constructed as a unit structure to improve the overall range and reliability of the electric vehicle. In the electric vehicle including, as a power system, a battery power supply, a motor, and a controller for controlling rotation of the motor, an electric power unit comprises a plurality of storage cells making up the battery power supply, a case housing the storage cells, a motor driving circuit and a charger both mounted on the case, a plate substrate covering the storage cells, and sockets for connecting respective terminals of the storage cells, the motor driving circuit and the charger.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: June 16, 1998
    Assignee: Seiko Epson Corporation
    Inventors: Ken-ichi Endo, Issei Yamakoshi, Masao Ono, Tamotsu Fukazawa
  • Patent number: 5466996
    Abstract: The remote-control device features a servomechanism that transmits the movements of a first control cable or tie rod, which is connected to handgrip or control pedal, to a second cable or tie rod which is connected to an application. The servomechanism features two neutral levers with bodies having a cylindrical sector. The levers are connected, respectively, to the cables or tie rods. This servomechanism features a shaft of a geared motor which is arranged coaxially between two bodies of the levers, features a spiral spring arranged between the two bodies and the shaft, and is tightly wound on the shaft. The spring has opposing ends which face outward and extend between the bodies. The servomechanism further features a transducer which detects the movements of first control cable and actuates an electronic unit which controls the geared motor in such a way that the remote control can be effected electromechanically or, in the event that the electrical components malfunction, mechanically.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: November 14, 1995
    Assignee: Ultraflex S.r.L.
    Inventors: Giorgio Gai, Walter Trivella
  • Patent number: 5205179
    Abstract: A speed changing device for a gear box, particularly for a toothed change speed gear of a motor vehicle in which a gear wheel, freely rotatable on a driven shaft can be coupled with the driven shaft by means of an axially displaceable claw ring and a toothed bushing, the claw ring being axially displaceable by an electric driving device via a gearshift fork, arranged on a selector shaft which is parallel to the driven shaft, characterized in that the gearshift fork is axially displacable on the associated stationary selector shaft by a spindle drive comprising an externally threaded section arranged on the selector shaft and an internally threaded section, the axes of both threaded sections being arranged on the axis (D.sub.1), of the selector shaft and one of the threaded sections being actuatable by rotation by an electromotor.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: April 27, 1993
    Assignee: INA Walzlager Schaeffler KG
    Inventor: Joachim Schneider
  • Patent number: 4930366
    Abstract: An electrical transmission control mechanism includes first and second control members which are individually limitedly rotatable to respectively select the directional and neutral modes or the speed ratio modes of a transmission. First and second electrical rotary type switching devices which are respectively responsive to the movement of the control members are disposed within the mechanism for controllably disconnecting the supply and ground side leads of one of a plurality of transmission clutch actuating solenoids and connecting the supply and ground side leads of another one to minimize the possibility of any inadvertent electrical short in causing unexpected operation of the transmission. Each of the compact and reliable rotary switching devices has a plurality of upstanding contact members arranged at preselected radii and a plurality of radially oriented wiper members that make selected contact with pairs of the contact members to provide a multitude of desirable operating functions.
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: June 5, 1990
    Assignee: Caterpillar Inc.
    Inventors: Val G. Boucher, Weldon L. Phelps, Daniel R. Ekstrand
  • 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: 4899607
    Abstract: An electrically controlled, fluidly actuated X-Y type shifting mechanism (30) for cooperation with a mechanical change gear transmission shift bar housing assembly (10) normally controlled by a manual shift lever is provided. The mechanism (30) includes a housing (32) having a single pressurized fluid connection (52) and a single electrical connection assembly (50) which is mounted to a shift bar housing assembly normally receiving a shift lever lower. A shift finger (38) extends into the shift bar housing for cooperation with the shift rail (12, 14, 16) shift blocks (24, 26, 28) and is positioned by two transversely mounted, axially movable shafts (68, 110). Each of shafts is axially positioned in a selected one of three selectable axial position by piston/cylinder assemblies (46, 42) controlled by six three-way, two-position electrically operated valves (150, 152, 154, 156, 158, 160).
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: February 13, 1990
    Assignee: Eaton Corporation
    Inventor: John E. Stainton
  • Patent number: 4886151
    Abstract: In a gear shifting device for the manual transmission of a motor vehicle with a gearshfit lever, with which the individual gear steps can be engaged over a gearshift rod, the gear shifting motion of the gearshift lever is transferred to the gearshift rod in a nonmechanical manner. The movement of the gearshift lever from the neutral position into the gear shifting position takes place in two steps, the first step acting as a preselection step and the function of the second step being to engage the selected gear step. A locking device permits movement of the gearshift lever from the first into the second step only when the necessary conditions exist for engaging the selected gear step perfectly; that is, when the clutch is disengaged and the gear wheels of the gear steps to be engaged are synchronized.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: December 12, 1989
    Inventors: Erich R. Muller, Edmund Volkert
  • Patent number: 4873881
    Abstract: An electrically actuated shift mechanism (100) is provided that is mountable upon a manual mechanical change gear transmission and operable to move a shift finger (20) in an (X--X) direction into registration with a selected shift rail and then move the shift rail in a (Y--Y) direction to effect the gear shift is response to either a selected operator input signal (S.sub.1) or a speed signal (S.sub.2).
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: October 17, 1989
    Assignee: Eaton Corporation
    Inventors: Stephen A. Edelen, David T. Allen, Bill E. Zylman
  • Patent number: 4817468
    Abstract: An electric shift apparatus for controlling a motor vehicle manual transmission. The apparatus includes a power module adapted to be bolted to the housing of the transmission, a control module adapted to be positioned in the passenger compartment of the vehicle, and a gear selector assembly positioned on the steering column assembly of the vehicle.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: April 4, 1989
    Assignee: Ap Aero, Inc
    Inventors: Keith V. Leigh-Monstevens, Edward L. Tury, Leslie P. Branum, Gregg A. Thoe
  • Patent number: 4722237
    Abstract: A pressurized fluid actuated shift bar housing assembly (12) for a change gear transmission (10) is provided having a plurality of shift bars (54, 56, 58), each shift bar having associated therewith a first (108) and a second (110) selectively pressurized and exhausted chamber utilized to axially position the shift bar in a first and second axially displaced position. A third relatively small volume selectively pressurized chamber (140) is utilized to positively axially position each of the shift bars in the nondisplaced axially centered positions thereof.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: February 2, 1988
    Assignee: Eaton Corporation
    Inventor: Joseph H. McNinch, Jr.
  • Patent number: 4621328
    Abstract: In an apparatus for operating the change lever of the speed change gear on the basis of the data concerning the passage for a change lever, the apparatus comprises a memory for storing the data, and a computer for obtaining detection signals corresponding to the opposite side positions of the passage by moving the change lever between the opposite sides at any desired portion within the passage, for updating the data stored in the memory on the basis of the detection signals and for computing the optimum moving path for the change lever on the basis of the updated data stored in the memory. Thus, the optimum moving path of the change lever can be automatically determined by the learning function, so that maintenance, inspection and the like can be remarkably simplified. Furthermore, it is possible to move the change lever smoothly to the desired gear shift position.
    Type: Grant
    Filed: April 14, 1983
    Date of Patent: November 4, 1986
    Assignee: Diesel Kiki Co., Ltd.
    Inventors: Kenji Arai, Masaharu Inamo
  • Patent number: 4583171
    Abstract: In an automatic transmission control device, an electric selector includes a circular common switch, a P range switch, a R range switch, a N range switch and a D range switch. A range shifting is instructed by the electric selector. When the common switch and one of the range switches are both operated in a predetermined manner, an instruction signal is delivered from the electric selector to a microcomputer. The microcomputer discriminates whether the instruction is proper or not. When the instruction is not proper, the microcomputer does not generate range shifting signals to a transmission actuator and generates a long buzzer drive signal. A driver of a vehicle is notified about this fact by a long sound of a buzzer.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: April 15, 1986
    Assignee: Nippondenso Co., Ltd.
    Inventors: Kiyoshi Hara, Yutaka Ninoyu, Munetaka Noda
  • Patent number: 4570765
    Abstract: A gearshift system for an automobile with an electromagnetic powder clutch and a transmission having four forward-gear sets. The system comprises a first synchronizing device for selectively engaging a second speed gear and a fourth speed gear with an output shaft of the transmission, a second synchronizing device for selectively engaging a first speed gear and a third speed gear with the output shaft, a first shifter arm for operating the first synchronizing device, and a second shifter arm for operating the second synchronizing device. A select lever is provided to engage one of the first and second shifter arms. The select lever is operated by a manual shift lever for shifting one of the shifter arms. Further, the select lever is moved by an electric actuator so as to engage with one of the shifter arms for the selection of the synchronizing device.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: February 18, 1986
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Fujio Makita
  • Patent number: 4570502
    Abstract: A transmission gearshifting arrangement in which the gearshift lever is provided with a normal shift position and a fast shift position, the latter resulting in relative motion between the gearshift lever and a cam plate. This relative motion produces closure of a fast shift switch to signal the electronic evaluation circuit of the desired fast shift. In the absence of a signal, a normal shift speed is indicated. A pressure control valve capable of producing a bilevel rate or pressure is controlled by the evaluation circuit to cause a power cylinder to effect the gearshifting at either a normal or a fast speed.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: February 18, 1986
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventor: Alfred Klatt
  • Patent number: 4567969
    Abstract: A gearshift system for an automobile with an electromagnetic powder clutch and a transmission having four forward-gear sets. The system comprises a first synchronizing device for selectively engaging a second speed gear and a fourth speed gear with an output shaft of the transmission, a second synchronizing device for selectively engaging a first speed gear and a third speed gear with the output shaft, a first shifter arm for operating the first synchronizing device, and a second shifter arm for operating the second synchronizing device. A select lever is provided to engage one of the first and second shifter arms. The select lever is operated by a manual shift lever for shifting one of the shifter arms. Further, the select lever is moved by an electric actuator so as to engage with one of the shifter arms for the selection of the synchronizing device.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: February 4, 1986
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Fujio Makita
  • Patent number: 4477072
    Abstract: Apparatus that simulates the exercise obtained in either of two modes of bicycling, e.g. sit-down, normal pedalling; and stand-up, hill climbing pedalling. Two different systems are disclosed, both yielding the desired bimodal choice of exercise. One system includes the use of clutches and gearing that allows switching between the normal 180.degree. fixed pedal relationship and a relationship that assists each pedal through bottom and top dead center, with the unweighted pedal being returned by the force generated by the other pedal as this other pedal is moved through the most powerful portion of the pedalling cycle. The second system includes the use of locking ratchets, adjustable spring returns, and adjustable stops to allow switching between the normal 180.degree. fixed pedal relationship and a relationship that avoids passage of the pedals through top and bottom dead center and confines all pedal movement to the power portion of the pedalling cycle.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: October 16, 1984
    Inventor: Richard J. DeCloux
  • Patent number: 4455885
    Abstract: A gear selector for a motor vehicle has a gear shift lever which is rotatable about its longitudinal axis to activate micro switches that select the desired gear ratio and is rotatable in the plane of its longitudinal axis about a pivot mounted to the steering column to activate micro switches for effecting forward or reverse movement of the vehicle. The gear selector contains a lockout device that prevents movement of the gear selector between the forward and reverse positions when the vehicle is operating in one of the higher gears.
    Type: Grant
    Filed: March 16, 1982
    Date of Patent: June 26, 1984
    Assignee: Zahnradfabrik Friedrichshafen Aktiengesellschaft
    Inventor: Willy Beig
  • Patent number: 4449416
    Abstract: A four speed, constant mesh transmission includes an input and an output shaft with four pairs of driver and driven gears respectively spaced on the two shafts. A pair of gear couplings are slidably disposed on the output shaft and splined for rotation therewith. Each gear coupling is selectively moved along the shaft for engagement with one of the driven gears by means of a pair of shift forks respectively engaged with the gear couplings. The two shift forks are slidably disposed on a guide rail which extends parallel to the input and output shafts of the transmission. Each shift fork includes a solenoid lock which may be selectively engaged with the guide rail for preventing sliding movement of the shift fork with respect thereto.
    Type: Grant
    Filed: September 4, 1981
    Date of Patent: May 22, 1984
    Assignee: J. I. Case Company
    Inventor: Thomas W. Huitema
  • Patent number: 4444072
    Abstract: A shift mechanism for a two-speed countershaft type transmission is operable to move the shift rail in response to a rotary input drive motor. The shift mechanism includes a control mechanism which ensures that the rotation of the drive motor will stop when the neutral position is effected during a gear interchange prior to completion of a shift so that normal gear synchronizing will occur. The control mechanism includes a rotatable plate having a slotted portion which includes stop surfaces at the neutral position. The stop surfaces are engaged during gear interchange by a pin member which must be selectively moved prior to completion of the gear interchange. Selective movement of the pin member is controlled by a solenoid mechanism.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: April 24, 1984
    Assignee: General Motors Corporation
    Inventors: Michael P. Grimes, William J. Vukovich
  • Patent number: 4304155
    Abstract: A transmission comprising a torque convertor and a power shift gear box having rotatable input and output shafts, multi-ratio drive means to produce different speeds of rotation of the output shaft relative to the input shaft, said drive means including gears which are in constant mesh and clutches, which are engageable and disengageable under load, to connect the gears in a desired drive path, control means for operating the clutches of the multi-ratio drive means to change the ratio of the gear box in dependence upon an electrical signal derived from rotation of a first element associated with the torque convertor input shaft and of a second element associated with an intermediate shaft upstream of the multi-ratio drive means and downstream of a variable torque capacity clutch located between the torque convertor output shaft and the multi-ratio drive means.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: December 8, 1981
    Assignee: Brockhouse Transmissions, Ltd.
    Inventors: Denis V. J. Want, Norman Schofield, Richard Gibbens
  • Patent number: 4269079
    Abstract: Arrangement for preventing incorrect shifting in a gearbox having a base portion and a two-speed range portion has a gear selector mechanism coupled to a shift unit and comprising a first blocking system coordinated with the shift unit of the range portion and the gear selector mechanism of the base portion to block shifting in the base portion during shifting of the shift unit in the range portion, and a second blocking system coordinated with means for sensing the rotational speed of the output shaft and with the gear selector mechanism of the base portion to prevent shifting to certain gears in the base portion when the rotational speed of the output shaft exceeds certain values. First and second blocking systems have a common blocking device. The first system has apparatus sensing the shifting movement of the shift unit and disposed to activate the blocking device to block the gear selector of the base portion in the neutral position during shifting.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: May 26, 1981
    Assignee: AB Volvo
    Inventors: Soren Fredell, Stig Jarl
  • Patent number: 4218938
    Abstract: A control system for a differential gear lock mechanism including a power transmission having at least two forward drives and a backward drive and a manually operated speed change lever associated with said power transmission.The control system comprises a differential gear, an air tank containing compressed air therein, a conduit for connecting said air tank with said differential gear, a valve disposed in said conduit for selectively supplying compressed air to said differential gear when actuated, and a solenoid-controlled valve disposed in said conduit for interrupting air supply to said differential gear when actuated wherein said solenoid-controlled valve is adapted to be actuated when said speed change lever is shifted to a higher drive.
    Type: Grant
    Filed: July 27, 1978
    Date of Patent: August 26, 1980
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventor: Masaharu Hattori
  • Patent number: 4175448
    Abstract: An electromechanical switching system which includes a multi-stage gearbox which has a plurality of manually selectable gear ratios corresponding to a plurality of positions of components which are movable between these positions, apparatus for automatically locating the components in the position corresponding to the selected gear ratio, and a device for locking the gearbox in a selected gear ratio while the operation is running. The position of the components is monitored and an indication provided the operator to prevent the start before the components are correctly positioned.
    Type: Grant
    Filed: October 21, 1977
    Date of Patent: November 27, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Loew, Wolfgang Hummel
  • Patent number: 4164876
    Abstract: In a transmission control system for a multiple speed ratio powershift transmission having a plurality of fluid pressure operated clutches adapted to establish torque ratio changes and also including an electronic speed sensing system and downshift valve means for automatically shifting the transmission from a higher speed ratio to a lower speed ratio at a first predetermined vehicle ground speed, the addition of a downshift inhibitor or delay circuit for prohibiting downshifts from the higher speed ratio to the lower speed ratio while the vehicle undergoes a full throttle directional reversal.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: August 21, 1979
    Assignee: Clark Equipment Company
    Inventor: Jon H. Peppel
  • Patent number: 4150416
    Abstract: A control circuit for a vehicle transmission system having a multi-ratio gearbox the individual ratios of which are obtained by energizing one of a plurality of solenoids by means of a selector switch. The control circuit is connected to a source of supply by means of a master switch and circuit means is provided to prevent energization of the solenoids in the event that the selector switch is left in a selection position prior to closure of the master switch.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: April 17, 1979
    Assignee: Lucas Industries Limited
    Inventors: Keith Heppenstall, Stephen A. White
  • Patent number: 4073198
    Abstract: In a device such as a spectrophotometer with an associated chart recorder in which the speed ratio between a first displaceable member and a second displaceable member may be selectively changed within a predetermined range of speed ratios, in a first embodiment of invention which is mechanical in nature, a number of gear trains in constant mesh with each other are provided to obtain the different speed ratios. Each of the gear trains has associated therewith a rotary disc with circumferentially even spaced apertures, the gear train obtaining an input from the first displaceable member by means of arms rotatable concentric with the discs, the arms carrying a pin adapted to enter into positive engagement with any one aperture, the number apertures depending on the scale served by the associated gear train.
    Type: Grant
    Filed: August 20, 1976
    Date of Patent: February 14, 1978
    Assignee: Perkin-Elmer Limited
    Inventor: Michael A. Ford
  • Patent number: 3983405
    Abstract: A shift control system is disclosed for use with a multi-stage transmission adapted to be disposed in a plurality of states in which various serial combinations of gears are disposed between an input and an output shaft. Two position solenoid valves are provided to control the engagement of each stage. A manually energized state selector for the transmission may take the form of either a shiftable lever or a plurality of push buttons, only one of which may be engaged at a single time. Pairs of single pole switches are associated with each state of the selector switch and are wired into two sets. Power is applied to one set or the other depending upon the position of a shift direction switch. Circuitry connects each solenoid valve to at least one switch in the upshift set and one in the downshift set. The higher shift ratios may be selectively deenergized to prevent the transmissionn from being accidently disposed in an excessively high shift ratio.
    Type: Grant
    Filed: December 19, 1974
    Date of Patent: September 28, 1976
    Inventor: John S. Donovan