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Class 74/473.11 - Fluid actuator


Subclass of Class 74 - Machine element or mechanism
Definition: Transmission control wherein the operation or engagement
No. of patents: 121
Last issue date: 12/13/2011


1        
NumberTitleIssue Date
8074533Servo assistance device for motor vehicle variable-speed transmission
A servo-assistance device (10) for a shift mechanism of a motor vehicle transmission, with which a characteristic curve can be produced which, as a function of a manual shifting force or a shift phase, has ranges of different gradients or proportionality to t...
12/13/2011
8065930Hydraulic actuator for transmissions having reduced noise
The present invention provides a three position hydraulic piston assembly for a gear ratio change mechanism for a transmission exhibiting reduced gear shift noise. The three position hydraulic piston assembly includes a master piston and motion retarding assemblies ...
11/29/2011
8006585Actuating cylinder for vehicle gearboxes
A vehicle transmission having a housing (5) with a region in which a connection plate (7) can be firmly attached. The connection plate includes areas for receiving at least parts of the actuating elements, which actuate the torque-transmitting componen...
08/30/2011
7703348Device for controlling and/or regulating a hydraulically activatable shifting element of a gearing mechanism and a gearing mechanism
A device (1) is described for controlling and/or regulating a hydraulically activatable shifting element. The shifting element (2) is configured with a piston-cylinder unit (3) that can be acted upon by a hydraulic operating pressure (p) and can...
04/27/2010
7294089Multiple-speed automatic transmission
An automatic transmission includes a first power path producing a first ratio of a speed of the input and a speed of a first power path output; a second power path producing a second ratio of a speed of the input and a speed of the second power path output, the seco...
11/13/2007
7246538Centering device for longitudinal elements and a resetting device for motor vehicles
A centering device for elongated elements consisting of a fixed position-retaining part (13) which includes a concave guiding surface (16), and a mobile position-retaining part (12) arranged on the elongated element, or vice versa. The mobile po...
07/24/2007
7222554Shift actuator for a transmission
A shift actuator for a transmission for turning, in a direction of shift, a shift lever support mechanism mounting the shift lever of the transmission, wherein it comprises an operation lever coupled, at its intermediate portion, to said shift lever support mechanis...
05/29/2007
7219574Hydraulic gear shift mechanism
A shift control device is described. The shift control device is attachable to the handlebar of a bicycle for controlling the piston of a hydraulic shift mechanism and includes a bracket attachable to the handlebar, a pivot shaft, a rotating member, and a control le...
05/22/2007
7188540Method and apparatus for controlling a transmission of a vehicle
The movement of a shift rail in an automatic gear transmission system, wherein each shift rail is connected to an associated actuator, is controlled with an electrical control signal. When a first electrical control signal is sent to a first of the actuators to actu...
03/13/2007
7137314Hydraulic gear shift mechanism
A hydraulic gear shift mechanism for a bicycle having a positioning mechanism for controlling the motion of the piston of a master cylinder assembly is disclosed, wherein the master cylinder assembly is in communication with a slave cylinder for operation of a derai...
11/21/2006
7086461Combined grip control of elevator and spider slips
Apparatus for gripping and releasing a tubular and comprising an elevator (13) having slips (15) for gripping and releasing a tubular (39,40). A spider (12) has slips (14) for gripping and releasing the tubular (33). A mecha...
08/08/2006
7082851Hydraulic servo assembly for an internal electronic transmission range selection (ETRS) system
A hydraulic servo assembly includes a piston slidably disposed within a housing and a pin extending from the piston. The pin is interconnected with a servo link rod of the ETRS system. A port enables inlet of hydraulic fluid to induce movement of the piston and the ...
08/01/2006
7076413Simulation result displaying apparatus for a pneumatic device and record of displayed result
A stroke time of a piston from excitation of a solenoid valve for driving the piston of a pneumatic cylinder to arrival at an end position thereof and a velocity of the piston at the arrival of the piston at the end position are determined by a simulation calculatin...
07/11/2006
7069800Coupling device and a method for coupling
Method and apparatus for positioning a coupling means in a gearbox in a first gear position, a second gear position and an intermediate neutral position. The apparatus includes a housing (5) that forms a working cylinder (6), a main piston (7) a...
07/04/2006
7069806Transmission auxiliary box seal system
The present invention provides a transmission including a main gear box and an auxiliary gear box secured to the main box. The auxiliary gear box includes an auxiliary shaft supporting an auxiliary gear with a clutch collar support on the auxiliary shaft adjacent to...
07/04/2006
7044260Vacuum actuated direction and speed control mechanism
An electronic control system for shifting the direction in an off road vehicle such as a lawn and garden tractor or a utility vehicle is disclosed. The control system consists of a control mechanism that activates a control circuit that in turn activates an actuator...
05/16/2006
7032475Hydraulic gear shift mechanism
A hydraulic shift gear mechanism for a bicycle having a positioning mechanism for controlling the motion of the piston of a master cylinder assembly is described. The master cylinder assembly is in communication with a slave cylinder for operation of a derailleur. T...
04/25/2006
7028575Transmission shifting mechanism
Monostable shifting mechanism, in which two shifting channels are provided for the shift lever. “Monostable” means that the shifting element or the shift lever has only one stable position. As a function of the actual “operating condition” of the shifting me...
04/18/2006
7017443Kickdown for pedal assembly
A pedal assembly (12) for electronically controlling an engine throttle (38). The pedal assembly (12) includes a pedal housing (14), a pedal arm (18) pivotally engaging the pedal housing (14), and an electrical generator (
03/28/2006
6976553Multimodal vehicle traction system
This invention relates to multiple driven axle vehicles, and particularly to all-terrain vehicles equipped for rear wheel drive, four wheel drive, and on-demand front wheel drive. The invention is directed toward a system of switchable traction options allowing the ...
12/20/2005
6973850Transmission gear shift lever device having a variable select lever ratio
The transmission gear shift lever device has a variable select lever ratio adapted to accommodate most of the operating mechanisms of the conventional transmission gear shift (TGS) lever device without major design changes. The select lever ratio is a ratio of rotat...
12/13/2005
6955103Kickdown member for pedal assembly
A pedal assembly (12) for electronically controlling an engine throttle (38). The pedal assembly (12) includes a pedal housing (14), a pedal arm (18) pivotally engaging the pedal housing (14), and an electrical generator (
10/18/2005
6892599Gear shift device for vehicles
A gear shift device for vehicles with a mechanical, manually operable gearbox (9) for the vehicle (2). A gear level (1) is linked to the hydraulic master (55, 55′, 56, 56′) to respective slave cylinders (8, 18) for engagement o...
05/17/2005
6892598Gearbox mechanism
A gear change mechanism is provided which is intended for a gearbox in which changes of the gear ratio in the gearbox are made mechanically in response to actuating signals. The mechanical movements required are as for a conventional gearbox having a H type pattern....
05/17/2005
6889573Shift actuator for a transmission
A shift actuator for transmission, for turning, in a direction of shift, a shift lever support mechanism mounting the shift lever of the transmission. An operation lever is coupled, at an intermediate portion thereof, to the shift lever support mechanism. A first el...
05/10/2005
6854353Gear shift mechanism
A gear shift mechanism has a displacement device, which can be operated by an actuator, for the axial displacing of a sliding sleeve. The actuator is connected with the displacement device by way of at least one joint. Such an articulated connection between the actu...
02/15/2005
6766710Hydraulic control device for operating a sliding selector shaft
A hydraulic control device operates a sliding selector shaft, in particular a gearbox for motor vehicles, with a bore made in a wall of a gearbox housing for accommodating a plastic piston. The piston is actively connected to the sliding selector shaft and delimits ...
07/27/2004
6723021Gear actuator for engaging and/or disengaging gears of a transmission
A gear actuator for engaging and disengaging gears in an automatic manual transmission has a single working piston or two working pistons provided with a first working piston surface and a second working piston surface. An auxiliary piston is provided also. A pressu...
04/20/2004
6658961Shift manipulating apparatus of automatic transmission
A shift manipulating apparatus for an automatic transmission is disclosed that transmits manipulating force from a shift lever to a manual valve to position the spool of a manual valve at identical places in ranges P and N. The apparatus comprises a shift...
12/09/2003
6615682Device and method for selecting a gutter of a transmission
An actuator for gutter selection in a gear positioning device for an automatic manual transmission has a selector shaft with a selector finger. A gutter selection device is movable back and forth along an axis into a first position and a second position. ...
09/09/2003
6612196Gear shifting device
A power-assisted gear shifting device (118) for a multi-speed step-change transmission (102) having a step-down design. The power-assisted gear shifting device (118) comprises a plurality of auxiliary units. Each one of the auxiliary units comprises a plu...
09/02/2003
6484600Pneumatic three-position shift mechanism with fewer components
An improved transfer case has fewer parts than the prior art to achieve the pneumatic three-position function. In the prior art the pneumatic cylinders were provided by bolt-on housings which required additional components to achieve a fluid tight connect...
11/26/2002
6397698Controlling device for transmission
The present invention intends to provide a controlling device for transmission in which locking action of the locking mechanism is not hindered by a part of the controlling device such as an actuator, when a fork shaft as an operating mechanism is held at...
06/04/2002
6363806Shift control method for pneumatic shift system
A shift control method for a pneumatic shift system including the steps of determining if a gearshift lever is positioned in a neutral range after receiving gearshift lever position signals, controlling a first magnetic chamber of a magnetic valve assembl...
04/02/2002
6357315Differential lock and four wheel drive control arrangement
An arrangement 1 for selectively actuating the four-wheel drive and differential lock engagement means of a vehicle comprises a hand operable selector mounted a bracket 4, the bracket 4 including a pathway, the selector comprising a protrusion which co-op...
03/19/2002
6347559Connecting device
The device connects a first shaft having a respective first axis, and a second shaft having a respective second axis located a given distance from and parallel to the first axis, and has an arm integral with the first shaft, and a pocket located along the...
02/19/2002
6338286Control device
Apparatus for controlling the gears of a motor vehicle comprising a pivotable gear lever for pivoting between gear positions corresponding to the gear positions for the motor vehicle transmission, a primary hydraulic piston/cylinder arrangement coupled to...
01/15/2002
6327931Control device
Apparatus is disclosed for controlling the operational states of a motor vehicle comprising a maneuvering console including a maneuvering lever, a pivot hinge for the maneuvering lever so that the maneuvering lever can be actuated into a number of positio...
12/11/2001
6325166Hydraulic travelling agricultural machine
In a hydraulic travelling agricultural machine which includes travelling sections, a pump operating unit is disposed in an operating section for controlling the steering and speed change of the travelling sections. The pump operating unit is connected int...
12/04/2001
6305237Bicycle shift control device for controlling a gas actuated shifting device
A bicycle shift control device for controlling a gas actuated shifting device includes a housing; a first gas valve actuating member; a second gas valve actuating member; a first shift member coupled to the housing for movement in a first direction, where...
10/23/2001
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