Abstract: A reversing eccentric member for a gerotor pump is shown. The eccentric member comprises a ring having opposed generally planar surfaces. One surface defines an arcuate notch for limiting rotation of the member. The opposite surface defines a slightly-raised radially innermost marginal portion which is knurled to minimize the surface area that supports the member in facing engagement with a stationary plate of the pump and also define channels to prevent sticking between lubricated adjacent machined surfaces. This limits the frictional engagement between the stationary plate and the eccentric member and the adhesive tendency of the film of lubricant therebetween so the member is generally freely and easily rotated on the plate in response to a change in the direction of rotation of the pump rotor.

Abstract: A reversible gerotor pump is shown which delivers a lubricant in a predetermined manner regardless of direction of rotation. The reversibility is provided by an eccentric collar having a cylindrical opening encircling the pump rotor and which is rotatable through a 180.degree. arc by frictional engagement with the rotor. To ensure this frictional engagement is greater than the frictional engagement between the collar and an adjacent stationary face plate which opposes rotation of the eccentric collar, the surface of the collar in facing engagement with the plate defines slight protrusions projecting therefrom. The protrusions abut the plate for a limited surface engagement therebetween and therefore provide limited frictional engagement. In this manner the friction between the collar and the stationary plate is minimized and the eccentric collar is relatively free to be rotated to either of two extreme positions within the 180.degree. arc depending upon the direction of the rotation of the rotor.

Abstract: A spring biased member is disposed between the facing surfaces of the reversing eccentric and the rotor of a reversible, unidirectional flow pump. The member is keyed to the eccentric and applies frictional torque to the eccentric from the rotor to drive the eccentric to the proper position as determined by a fixed stop in accordance with the rotor's rotation. The member extends generally tangentially beyond either side of the contact points on the circular rotor face and presents a wedge-shaped confined space to the lubricant on the rotor face. The lubricant is driven into the wedge by the rotating rotor and raises the member from intimate contact with the rotor surface to maintain a thin lubricant film therebetween. This film of lubricant thus separates the member from the rotor face whenever there is relative motion between them to reduce wear on the otherwise contacting parts.

Abstract: A reversible lubricant pump supplies oil to one of a pair of tandem drive axles. The pump includes a housing mounted on the axle helical gear cover to receive oil from an oil sump within the axle casing and to discharge oil to various components within the drive axle assembly. A drive gear and a driven gear are mounted within the housing for rotation in either direction to pump oil from a common inlet passage to a common outlet passage. The drive gear is mounted on a pump shaft which extends from within the housing to within the axle helical gear cover and has a pump gear fixedly mounted thereon. The pump gear is driven in response to movement of an input shaft of the axle assembly to cause the pump to operate in both the forward and reverse directions. A lubricating port within the housing extends from the pump discharge to the bearing of the pump shaft to provide the pump shaft with lubrication when the drive axle assembly is operated in the forward direction.

Abstract: A rotary pump of the stationary single vane type wherein the vane is arranged to automatically accommodate for the direction of rotor rotation to provide for the flow of fluid through the pump in a single direction regardless of the direction of rotor rotation, the vane also being operable to automatically relieve excessive pressures in the pumping chambers.

Abstract: This device functions as a compressor or pump when driven in rotation, and functions as an engine when driven by expansion energy. A housing encases a vane rotor mounted off center for rotation in a cylinder. The slotted rotor is constructed with vane bearing inserts retaining arcuate cast iron vane bearings adjacent the multiple vanes. Vanes are flexibly secured by vane retainers mounted on a rotatible central shaft surrounded by a bushing functioning as a bearing. Improved sealing means are incorporated encircling the rotor and at the edges of the rotor vanes. The device may be utilized as an internal combustion engine by incorporating fueling and spark means. The machine is particularly suited to be driven by expanding gases such as natural gas, air, fluorocarbon gases, or steam as a motor.

Abstract: Systems for delivering fluid at substantially constant pressure to consuming loads which exhibit widely varying demands. The systems employ parallel connected booster pumps which may be operated in either of two rotational directions to provide two output flow rates for each pump.