Abstract: The present invention relates to an eccentric-type vane pump and, in particular, to an eccentric-type vane pump being capable of generating minimum heat and noise due to frictional force produced from rotation of the vane pump. The vane pump comprises a rotor connected to a rotor shaft having vanes slidably received in vane grooves and recessed within a space in the periphery of the rotor for moving radially by rotation of the rotor. A cylinder ring is positioned eccentrically around the rotor and is rotated by the frictional force produced from abutting the front end of the vanes. A pump chamber is formed between the rotor and the cylinder ring. A cylinder body is provided having a bearing between the outer surface of the cylinder ring and the cylinder body. A front body is connected to a first end of the cylinder body. One end of a rotor shaft is supported on a recess formed on one side of the front body.

Abstract: Rotation of transmission shafts as typically provided by the clutch brake is instead provided by increasing the load on the transmission shafts. In one embodiment, this is achieved by restricting flow through the supply line between the shaft driven pump and the oil cooler. By restricting this flow, the load on the pump increases, and the torque required to drive the pump increases. This, in turn, retards rotation of the transmission shafts to achieve the function typically provided by the clutch brake of stopping rotation. The present invention thus provides the function without the requirement of a clutch brake. The present invention is much more easily serviced or replaced than a clutch brake, and includes only elements which are accessible from outside of the transmission, and thus may be easily serviced or replaced.

Abstract: The invention relates to a drive unit for a motor vehicle having a hydrodynamic retarder and a drive train with an engine and a transmission. The hydrodynamic retarder is comprised of a rotor impeller wheel and a stator impeller wheel and is coordinated with the main drive train in a manner such that the rotor impeller wheel of the hydrodynamic retarder is driven by the drive train. The operating fluid of the hydrodynamic retarder is a medium used for cooling the vehicle and a clutch is arranged between the drive train and the hydrodynamic retarder.

Abstract: A torque converter (1) including a front cover (2), a torque converter main body housing (3) and a retarder (5). The front cover (2) is coupleable to a crankshaft of an engine. The torque converter main body housing (3) is coupled to the front cover (2) forming a hydraulic fluid chamber (A). The torque converter (1) outputs torque transmitted from the front cover (2) to the main drive shaft (34). The retarder (5) is arranged inside the hydraulic fluid chamber (A) and uses the fluid to dampen torque transmitted from the torque converter main body housing (3) to the main drive shaft (34).

Abstract: The present invention is directed to a retarder control system for protection against transmission overspeed. The system operates in conjunction with a rotatable input member and an output member that is rotatable relative to the input member. A torque transfer device is operatively connected between the relatively rotatable input and output members. Specifically, a piston assembly is operated by an input control chamber that selectively receives pressurized hydraulic fluid which effects translation of the piston assembly to actuate the torque transfer device and thereby effect a driving connection between the relatively rotatable input and output members. The present system is adapted to control a hydrodynamic retarder assembly having a work cavity to receive hydraulic fluid. The retarder input valve assembly is supported from one of the relatively rotatable members selectively to deliver pressurized hydraulic fluid from the input control chamber to the retarder cavity.

Abstract: A hydraulic retarder including a rotor vane fixable to a rotational shaft rotating with vehicle wheels to relatively be unrotatable with respect thereto, a stator vane substantially unrotatable with respect to the vehicle body, and a clutch apparatus for engaging the rotational shaft with and disengaging same from the rotor vane. The clutch apparatus is provided with a plurality of clutch plates which are engaged with the rotational shaft to be axially slidable and alternately provided among a plurality of pressure plates. The rotor vanes, stator vanes and clutch apparatus is accommodated in a casing secured to the vehicle body parts within which an operation fluid is filled. The hydraulic retarder of the invention further includes plungers disposed spaced apart from one another and penetrating through the casing with fluid sealingly and located at an end of the support member. A drive apparatus disposed outside the casing for actuating the clutch apparatus by depressing the plunger into the casing.

Abstract: According to the invention, there is provided a damper for a flapdoor that does not show any damping effect when its movable shaft of the damper is rotated with the door in one sense whereas it effectively damps the rotary movement of the flapdoor when the movable shaft is rotated with the door in the other sense, wherein a one-way clutch for engaging or disengaging the movable shaft with a movable member depending on the sense of rotation of the movable shaft to cause a viscous shearing drag in the viscous fluid contained in the damper and a power source constitute so many integral parts of a coil spring. A damper for a flapdoor having such an arrangement can have a simplified configuration as compared with a damper provided with a separate coil spring as power source and a separate one-way clutch and therefore can be realized with reduced dimensions.

Abstract: A differential includes a planet gear through which two shafts coupled to laterally spaced road wheels of a motor vehicle are interconnected. The planet gear has a rotatable shaft with a brake mechanism coupled thereto. A braking force produced by the brake mechanism is transmitted through the differential to the road wheels depending on the rotational speeds of the road wheels. The brake mechanism may include either a turbine for producing a resistive force upon rotation thereof or a hydraulic damper comprising a hydraulic pump and a variable restriction.

Abstract: A damper for damping rotation has a construction in which a rotor having a braking plate immersed in oil disposed within a casing and a gear are coupled together by a means of a clutch spring in the form of a coil spring. When the gear is rotated in one direction, it is coupled with the rotor as a result of diametrical contraction of the spring, and a restoring force is stored within the clutch spring, thus producing a resistance against rotation. When it is rotated in the opposite direction, the restoring force of the clutch spring is released so as to permit free rotation of the gear. The coil spring is coiled about a shouldered portion of the rotor shaft and a lower portion of a gear sleeve, supporting the gear, which have the same diametrical extent. In this manner, projecting end portions of the spring, upon which excessive loads have been impressed within the prior art, are able to be eliminated thereby providing extended service life to the spring and damper assembly.

Abstract: A one-way clutch comprises a stationary panel rotatably supporting in place an inner toothed ring possessing inner teeth, an output toothed wheel provided on the stationary panel at a position not to be meshed with the inner teeth of the inner toothed ring, and a planet gear interposed between the inner teeth and the output toothed wheel and adapted to be meshed with or separated from the output toothed wheel, depending on the direction of rotation of the inner toothed ring. This one-way clutch, with a braking plate attached to the output toothed wheel thereof and sealed in a damper housing together with viscous oil, can be utilized as a damper for a lid in a machine for the purpose of absorbing shocks produced only while the lid is being opened.

Abstract: A method of making a tensioner for a power transmission belt that is adapted to be operated in an endless path is provided and comprises the steps of providing a support unit for being fixed relative to the belt, providing a belt engaging unit to be carried by the support unit and be movable relative thereto, operatively associating a mechanical spring unit with the support unit and the belt engaging unit for urging the belt engaging unit relative to the support unit and against the belt with a force to tension the belt, operatively associating a fluid dampening unit with the support unit and the belt engaging unit to dampen the movement of the belt engaging unit relative to the support unit in at least one direction thereof, forming the mechanical spring unit to comprise a pair of springs disposed in substantially parallel spaced relation, disposing at least a part of the fluid dampening unit between the springs and in substantially parallel relation therewith, and forming the fluid dampening unit to compris

Abstract: A vehicle clutch having clutch plate and disc members within a sealed clutch housing operative to effect engagement and disengagement of the clutch by operation of a disengaging member. An oil pump structurally associated with the disengaging member provides oil for the clutch through a guide wheel which is axially movable together with the disengaging member. In the engaged position, a deflector directs an oil stream from the guide wheel through openings to the clutch plate and disc members, while in the disengaged position a pump wheel is provided with pump impeller blades to deflect the oil stream from the guide wheel away from the clutch plate and disc members.

Abstract: A combined hydrodynamic retarding brake and oil-cooled driveline flywheel clutch, the clutch (72) being integral with a retarding brake impeller (52) rotatable in a body of oil (58) contained within a housing (22) having a retarder flow circuit (118) therein, the amount of retardation being controllable by varying the amount of oil present in the circuit (118), the retarder impeller (52) operating to supply a flow of cooling oil through the clutch (72), and a clutch brake (102) operable to apply a braking action to the clutch, as the clutch (72) is disengaged operating to stop clutch output, and cut off oil flow to the clutch thereby reducing viscous drag at the clutch.

Abstract: A hydraulic retarder in conjunction with a multi-speed power transmission that finds particular utility for off-highway trucks. The hydraulic retarder is continuously filled with oil and is positioned in series with a hydraulically actuated friction type clutch. The retarder remains filled at all times and consequently there is no loss of time in filling or dumping the retarder when it is desired to utilize its retarding action by engaging its clutch.This "instantaneous" reaction to engagement and disengagement of the retarder makes it possible to use this retarder in certain automatic modes where conventional dump and fill hydrodynamic retardation devices are so slow to react as to be difficult to apply. This retarder has clutched engagement and disengagement. The torque capacity versus speed is varied through cavity pressure control.

Abstract: A hydrodynamic retarder for vehicles with an internal working circulation within a working space between at least one rotating and one fixed blade wheel and with an external cooling circulation, whereby the filling of the working circulation takes place from a filling cylinder actuated by a pressure medium, whose actuation is controllable by an actuating device such as a hand brake lever by means of a control valve; a relay valve is thereby arranged in the pressure medium inlet line which, in its turn, is controllable by the actuating device by means of the control valve.

Abstract: A time delay device for delaying movement in one direction and permitting relatively free movement in the opposite direction wherein alternate plate members and wall members in a housing are coated with a viscous grease and the plate members are rotated through a shaft connected by a one-way clutch to the control member whose motion is to be delayed.

Abstract: A clutch and brake device for the impeller of a hydrodynamic device in which the clutch is engaged by selectively admitting pressure from a source of pressure to a clutch servomotor, this pressure being conducted to a release chamber for the brake servomotor to automatically release the brake, thus insuring proper timing of release of the brake and engagement of the clutch. The brake is applied by the charge pressure within the hydraulic torque converter which is applied to the opposite side of the piston for the brake with respect to the pressure from the source of pressure. Thus, when the pressure from the source of pressure is exhausted releasing the clutch, the charge pressure of the converter will automatically engage the brake. The charge pressure is also conducted to the release side of the piston for the clutch device, thus insuring the clutch will be fully released when the brake is engaged.

Abstract: A continuous brake for motor vehicles, especially for heavy commercial vehicles, in the form of a hydrodynamic coupling, which is filled from a storage device during actuation of the brake valve and which is automatically emptied into the storage device when the brake valve is disengaged, a solenoid-actuated threeway valve is thereby arranged in the line from the brake valve to the storage device which, when energized, closes the line from the brake valve and vents the line to the storage device while a switch is connected in the energizing circuit of the solenoid valve which closes during actuation of the clutch pedal when the clutch is disengaged.