Patent application number | Description | Published |
20100043901 | HYDRAULIC APPARATUS HAVING AN AXIALLY ACTUATABLE BYPASS VALVE - A hydraulic apparatus includes a housing portion having two main conduits and a central conduit. Valves are supported in the housing portion. At least one valve is interposed between each main conduit and the central conduit. Each of the valves has a closed position for preventing a free flow of fluid between the central conduit and its associated main conduit and have an open position for enabling the free flow of fluid between the central conduit and its associated main conduit. The hydraulic apparatus also includes a bypass valve assembly having a plunger portion that extends into the central conduit. The plunger portion is movable in an axial direction for moving the valves from the closed position to the open position. | 02-25-2010 |
20110085928 | GEROLLER HYDRAULIC MOTOR WITH ANTI-COGGING STRUCTURE - A hydraulic motor | 04-14-2011 |
20110189019 | SHROUD FOR ROTATING MACHINE COMPONENT | 08-04-2011 |
20120275933 | HYDRAULIC APPARATUS RETURN TO NEUTRAL MECHANISM - A hydraulic apparatus is provided with a return to neutral mechanism for returning a trunnion control bracket arm to a neutral position. The return to neutral mechanism comprises a pair of springs, one spring connecting a fixed bracket to a first rotatable bracket and the other spring connecting the fixed bracket to a second rotatable bracket. The mechanism uses springs with different spring constants and the springs are attached to the brackets in a single plane. | 11-01-2012 |
20130145890 | HYDRAULIC APPARATUS RETURN TO NEUTRAL MECHANISM - A return to neutral mechanism is provided for hydraulic apparatuses such as motors/pumps that utilize a swashplate and a trunnion arm to control flow. The return to neutral mechanism includes two rotating brackets which have ends aligned to a single plane. Two springs are utilized and attached to the ends of the two rotating brackets giving the force mechanism the ability apply the force in a direct path, reducing friction, increasing life, and improving accuracy. This design is an “x” type mechanism, the force arms are in-line and do not cross, the force is applied equally on both sides of the fulcrum and therefore balanced. The mechanism can be can be used with compression springs, tension springs, torsion springs, or leaf springs | 06-13-2013 |
20130302188 | ELECTRO-HYDRAULIC DRIVE SYSTEM - Provided is an electro-hydraulic drive system including first and second electro-hydraulic transmissions for driving respective wheels, the transmissions each including an electric motor, a hydraulic pump driven by the electric motor, and a hydraulic motor drive by the hydraulic pump. When used in a turf vehicle, such as a zero-turn-radius mower, the electro-hydraulic drive system operates the wheels independently from an engine of the mower, thereby allowing the mower to be moved without having to start the engine. In this way, power consumption is lowered and total efficiency of the mower is increased. | 11-14-2013 |
20140305091 | RESIDENTIAL TRANSMISSION - Provided is a hydrostatic transmission including a pump/motor module having a reservoir housing and a hydraulic pump and motor disposed in the reservoir housing, and a speed reduction module having a speed reduction housing coupled to the reservoir housing and a speed reduction assembly disposed in the speed reduction housing. The speed reduction assembly includes an input member driven by the output shaft of the hydraulic motor, an output member rotationally connected to the input member by one or more belts/chains, and an axle shaft driven by rotation of the output member. By providing the speed reduction assembly in a separate housing from the hydraulic fluid in the reservoir housing, the speed reduction assembly is isolated from the hydraulic fluid thereby preventing particulates from the speed reduction assembly from entering the hydraulic fluid in the reservoir housing. | 10-16-2014 |
20140367180 | HYDROSTATIC TRANSMISSION WITH INTEGRATED PUMP AND MOTOR - A hydrostatic transmission includes a hydraulic pump, a top housing that houses the hydraulic pump, and a hydraulic motor. An endblock sub-assembly has a pump running face for interfacing with the hydraulic pump, and a motor connection portion for interfacing with a hydraulic motor. The enblock sub-assembly forms a porting manifold for communicating hydraulic fluid from the hydraulic pump to the hydraulic motor. The hydraulic motor includes an internal rotor set, and the hydraulic motor is secured to the endblock sub-assembly in a manner that permits rotation of the rotor set. The top housing is fixed to the endblock sub-assembly such that the housing and endblock sub-assembly form a reservoir for the hydraulic fluid. The motor connection portion of the endblock sub-assembly supports the hydraulic motor externally to the top housing. The hydrostatic transmission is suitable for incorporation into various light vehicle categories, including zero-turn radius vehicles. | 12-18-2014 |