Patent ID: 6739849
Filing Date: 2004-05-25
Classification: F04C

Abstract:
A gerotor motor, comprising,a housing having a center bore aligned with and connected to a port plate, a gear set and end plate with center bores being in the port plate and gear set in axial alignment with the center bore of the housing, an elongated shaft extending through the gear set, the port plate and the housing and extending outwardly from the housing, first and second spaced fluid chambers in the housing around the shaft, a disc valve assembly on the shaft and having a surface engaging the port plate to form a sealing surface to prevent the passage of fluid between the fluid chambers of the housing, a sealing element between the first chamber in the housing and the disc valve assembly to prevent the passage of fluid between the fluid chambers in the housing, commutation slots formed in a forward end of the disc valve assembly, and blind slots formed on the rearward end of the disc valve assembly to balance the mass of material existing on opposite sides of a plane passing through the valve assembly in a direction perpendicular to the longitudinal axis of the shaft to retard any deflection of the disc valve assembly which might otherwise interfere with the sealing relationship between the disc valve assembly and the port plate.