Abstract: A seal having a steel backing ring closely surrounding a shaft supporting a seal through a teflon intermediate member, the seal itself having a generally "L" shaped steel backup plate next to the intermediate member.

Abstract: In a hydraulic motor having an orbiting valve, the improvement of the orbiting valve being connected to the wobble stick for rotation therewith and the orbiting valve being non-circular with a series of discreet valving openings and notches formed therein.

Abstract: A closed center gerotor device wherein the sealing between the commutator for the device and the surrounding body is provided by a wave spring biased "O" ring sealed pressure operated piston.

Abstract: A seal utilizing a two part construction of a rubber resilient body and a steel sealing wear member for use in a cavity to create a seal between two parts that have relative motion in respect to each other.

Abstract: A hydrostatic steering valve utilizing a shaft mounted valve seat and a surrounding valve member which has no physical impediments such as a bearing or seal surrounding the valve member so as to allow the valve member to float with the valve seat totally unimpeded.

Abstract: A gerotor device with an orbiting valve wherein the outside diameter of the valving passages in the orbiting valve are smaller than the inside diameter of the rotor wobblestick drive connection.

Abstract: A lubrication system for the main drive connection of a gerotor device, the lubrication system having a pressure operated piston valve connected directly off of the gerotor cells of the device for bi-directional circulation of fluid therethrough.

Abstract: An improved hydrostatic steering mechanism is disclosed having the operation valve for the steering mechanism located within the rotor of the metering and feedback operational gerotor set.

Abstract: A gerotor device is disclosed wherein the pressurized fluid is segregated to the area of the device near the orbiting valve by the sealing of the wobblestick drive connection to the valve. In the preferred embodiment shown this sealing is accomplished by restricting the effective size of the drive opening through the valving plate of the manifold plate to an area less than that capable of being sealed by the inside drive surface of the valve.

Abstract: A device having two gerotor structures, each having a rotor oriented with a certain neutral phase relationship in respect to its stator, is disclosed having the neutral phase relationship of one gerotor structure being different in respect to the neutral phase relationship of the other gerotor structure so as to even the torque output of the device.

Abstract: A rotary fluid pressure device is disclosed comprising a housing having fluid inlet and outlet means and enclosing a gerotor having an internally toothed member and a coacting externally toothed member having a less number of teeth than the internally toothed member and having its axis positioned eccentrically relative to the axis of the internally toothed member. A wobble stick in the housing has a first end connected to the axial drive shaft and a second end connected to the gerotor member having the orbital movement. The housing has one set of passageways communicating at all times with the expanding and contracting gerotor cells. The gerotor member having orbital movement is, in addition to its usual function, a valve with two travel passageways, one travel passageway coaxially surrounding the other passageway.

Abstract: An improved hydrostatic steering mechanism is disclosed having a rotary valve with a radially displaced resilient feedback mechanism.

Abstract: An improved gerotor device is disclosed wherein the lobes of the rotor are cutaway to the main lines of action of the device.

Abstract: An improved hydrostatic steering mechanism is disclosed having a rotary valve with a radially displaced resilient feedback mechanism.

Abstract: A balancing plate for rotor valved gerotor motors is disclosed. The balancing plate is mounted on the opposite side of the high pressure rotor valving input with its own connection to high pressure to compensate for the pressure imbalance in the device.

Abstract: A rotary fluid pressure device is disclosed comprising a housing having fluid inlet and outlet means and enclosing a gerotor having an internally toothed member and a coacting externally toothed member having a less number of teeth than the internally toothed member and having its axis positioned eccentrically relative to the axis of the internally toothed member. A wobble stick in the housing has a first end connected to the axial drive shaft and a second end connected to the gerotor member having the orbital movement. The housing has one set of passageways communicating at all times with the expanding and contracting gerotor cells. The gerotor member having orbital movement is, in addition to its usual function, a valve with two travel passageways, one travel passageway coaxially surrounding the other passageway.

Abstract: An apparatus and method for honing cylindrical bores adjacent to a larger cavity or bore is disclosed. The apparatus comprises a set of expandable abrasive-coated frustro-conical sleeves mounted on rotating shafts, one for each cylindrical bore, which circumferentially surround, and are supported by, a rotating inner supporting member. The sleeves and supporting member are moved through the bore and larger cavity in a direction along their axis of rotation, and in so doing, the sleeves contact the bore walls to impart a honing action. A means for precisely adjusting the final honing diameter of the sleeves is provided, as well as means for adjusting the distance of the sleeves from the center of the larger cavity. By adjusting the sleeves at successively closer positions to a desired final bore, the bore can be honed with great accuracy.

Abstract: A hydrostatic steering unit is presented with axial spool valve actuation, and a gerotor set with valving in the rotor side face. The gerotor set comprises an orbiting gerotor displacement device with rotor valving, and with an input drive system directly to the gerotor device without driving through the valving, and also with an axially movable valve with a torsion member between the orbiting gerotor member and the input shaft. There is a split actuation pin for the valve, an eccentric bushing for the pin, and an adjustment for the neutral position of the valve.

Abstract: A hydrostatic steering unit is presented with axial spool valve actuation, and a gerotor set with valving in the rotor side face. The gerotor set comprises an orbiting gerotor displacement device with rotor valving, and with an input drive system directly to the gerotor device without driving through the valving, and also with an axially movable valve with a torsion member between the orbiting gerotor member and the input shaft.

Abstract: A hydrostatic steering unit is presented with axial spool valve actuation, and a gerotor set with valving in the rotor side face. The gerotor set comprises an orbiting gerotor displacement device with rotor valving, and with an input drive system directly to the gerotor device without driving through the valving, and also with an axially movable valve with a torsion member between the orbiting gerotor member and the input shaft.