Expanding Fluid Motor Chamber Mechanically Contracts Second Motor Patents (Class 475/143)
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Patent number: 11865912Abstract: A transfer for a four wheel drive vehicle includes first and second distribution mechanisms. The first distribution mechanism includes a first clutch and is configured to distribute a portion of power from a power source to a second transmission mechanism through the first clutch. The second distribution mechanism includes a planetary gear set and a second clutch, and is configured to distribute a portion of power from the power source to a second transmission mechanism through the planetary gear set and the second clutch in order. The first and second clutches are configured to be controlled to a half-engaged state between engagement and disengagement. An input shaft of the first distribution mechanism and an input shaft of the planetary gear set are unitized.Type: GrantFiled: June 16, 2022Date of Patent: January 9, 2024Assignee: SUBARU CORPORATIONInventors: Masayuki Ushiki, Katsuya Higuchi
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Patent number: 9822860Abstract: A drive-train for a vehicle with at least one electric drive, which can be coupled via a driveshaft (2) to at least a first transmission ratio stage (i1) and a second transmission ratio stage (i2). At least one shifting mechanism is provided for engaging the transmission ratio stages (i1, i2). To carry out powershifts, the shifting mechanism includes at least one interlocking shifting element (5) and at least one frictional shifting element (6, 6A). Each of the transmission ratio stages (i1, i2) can be engaged by the interlocking shifting element (5) and at least one of the transmission ratio stages (i2) can be engaged both by the interlocking shifting element (5) and by the frictional shifting element (6). Methods for carrying out a powershift, between a frictional shifting element (6, 6A) and an interlocking shifting element (5) in the drive-train, are also disclosed.Type: GrantFiled: February 12, 2014Date of Patent: November 21, 2017Assignee: ZF Friedrichshafen AGInventors: Johannes Kaltenbach, Matthias Reisch, Ulrich Kehr, Michael Preuβ, Kai Bornträger
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Patent number: 9360109Abstract: A method of controlling movement of an actuator fork and attached synchronizer sleeve of a transmission through a pre-synchronization phase of a synchronization event at a pre-synchronization fork velocity below a breakaway velocity such that a strut is retained to the sleeve by a ball plunger for the duration of the pre-synchronization phase. A method of adjusting one of a pressure signal and a flow signal to an actuator piston to control movement of the actuator fork includes moving the fork from an initial disengaged position through a pre-synchronization phase of a synchronization event by controlling one of a pre-synchronization fluid pressure value and flow value, where the controlled pre-synchronization fluid value is less than a threshold value corresponding to a breakaway force of a ball plunger configured to selectively retain a strut assembly to a synchronizer sleeve operatively attached to the actuator fork.Type: GrantFiled: April 16, 2014Date of Patent: June 7, 2016Assignee: GM Global Technology Operations LLCInventors: Christopher Jay Weingartz, Glenn W. Hoefflin
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Patent number: 6997840Abstract: A transmission includes at least one planetary gear set having first, second and third members; a clutch pack connected to one of the members; and a rotatable housing member connected to another one of the members. A piston assembly is supported on the rotatable housing member and rotatable therewith. The piston assembly includes a thrust bearing operatively connected with an axially movable piston to receive an apply force from the piston, and a piston apply member positioned between the thrust bearing and the clutch pack for transmitting the apply force to the clutch pack. Fluid for applying the piston is carried through a stationary support member, through the rotatable housing member, and into the piston assembly.Type: GrantFiled: February 23, 2004Date of Patent: February 14, 2006Assignee: General Motors CorporationInventor: Paul D. Stevenson
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Patent number: 6949042Abstract: A shiftable transmission in which at least two clutches (2, 7) actuated in closing direction by spring force and in opening direction by the exertion of pressure are arranged, wherein output of the transmission is stopped by unpressurized shifting of both actuation devices (9, 13) thereby closing both clutches (2, 7). When pressure is exerted upon the second actuation device (13), the actuation force of the first actuation device (9) is composed of a spring force of the first actuation device (9) and a hydraulic force from the pressurization of the second actuation device (13). The clutch belonging to the first actuation device can thus be impinged upon with different forces depending on whether or not the second actuation device is impinged upon with pressure.Type: GrantFiled: April 27, 2002Date of Patent: September 27, 2005Assignee: ZF Friedrichshafen AGInventors: Helmut Eymüller, Siegfried Stützle, Jürgen Legner
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Patent number: 6826449Abstract: A method to produce natural motions, or self-motion, of animate or inanimate bodies or their parts by the application of pulses at two or more locations on the surface, or inside, of the bodies or their parts. Here, energy is converted into motion in one step. Turn on the pulses, and motion results instantly. The mechanism can emulate living motions, and as living motions can take on infinite gaits and forms, so can the mechanism produce infinite forms of motion. Smooth, repeatable, controllable or random motions can be induced. Just as living muscles convert the pulses from the nervous system into natural motion in one step, so will the mechanism convert artificially generated pulse-trains into motion in one step. The dynamic coupling or modulation of waves which travel within a body, and which are caused by artificially generated pulse-trains, produces the desired motions in directions perpendicular to the plane of the pulses.Type: GrantFiled: December 30, 1997Date of Patent: November 30, 2004Inventor: Ali F. Abu-Taha
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Patent number: 5788038Abstract: Anti-gear hopping device for a power transmission mechanism for an automotive vehicle. The power transmission mechanism may be a torque transfer case of a four wheel drive system. The anti-gear hopping device prevents undesired shifting between high range speed and low range speed modes of operation. The anti-gear hopping device comprises: (A) a fluid pressure mechanism for controlling the movements of a shift member; (B) a valve mechanism for actuating the fluid pressure mechanism; and (C) a valve actuator. The fluid pressure mechanism may include either a diaphragm or a piston which divides a chamber into two cavities which may be at different pressures. An output member linked to the diaphragm or piston controls shifting.Type: GrantFiled: October 3, 1996Date of Patent: August 4, 1998Assignee: Dana CorporationInventors: John L. Hickey, Wesley M. Dick
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Patent number: 5758302Abstract: A control system for a multiple ratio transmission including two overrunning couplings acting in cooperation with friction clutches and brakes to effect controlled shifts between ratios to reduce inertia torque upon engagement of friction brakes associated with speed ratio downshifts that occur in time-controlled stages following a command for a downshift and for establishing an electronic pressure accumulator effect upon speed ratio upshifts following a command for an upshift.Type: GrantFiled: February 11, 1997Date of Patent: May 26, 1998Assignee: Ford Global Technologies, Inc.Inventors: Winfried Franz-Xaver Schulz, Johann Kirchhoffer
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Patent number: 5203747Abstract: An integrated hydromechanical transmission capable of achieving continuous variability from maximum forward, through zero, to full reverse, and vice versa. The unit will achieve significantly higher rates of efficiency than current hydrostatic transmissions and, as well, has many other desirable characteristics. Intended for use in heavy-duty drive-wheel-steered and tracked vehicle applications such as hay windrowers, grain swathers, crawler tractors, military armoured vehicles, etc.Type: GrantFiled: October 10, 1991Date of Patent: April 20, 1993Inventor: Walter S. Warren
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Patent number: 5188570Abstract: An automatic transmission has a low clutch and a band brake. The band brake is actuated by a hydraulic servo device. In order to establish well timed operations of the low clutch and the band brake upon shifting from third gear to fourth gear, both the release of the low clutch and engagement of the band brake are effected by discharging a hydraulic pressure through a common oil passage from the low clutch and one of the oil chambers of the servo device.Type: GrantFiled: January 14, 1992Date of Patent: February 23, 1993Assignee: Nissan Motor Co., Ltd.Inventor: Tatsuo Wakahara