Patent ID: 7093528
Filing Date: 2006-08-22
Classification: F01K,F02C,Y10T

Abstract:
1. An epicycling device with improved sealing, comprising: a housing defining a piston chamber having at least three walls, wherein adjacent walls are spaced apart; a piston element linked eccentrically to a drive shaft passing through the center of the piston element, wherein the piston element is positioned within the housing, has a cross sectional shape for mating with the housing walls, and includes a generally circular recessed surface at each corner; seal housings with a hollow cylindrical cross sectional shape with openings mating with the space between the adjacent walls; an inner seal element positioned within each of the recessed surfaces, the inner seal element including an elongate cylindrical body with a slot passing therethrough; an outer seal element positioned within each of the seal housings, the outer seal element including an elongate cylindrical body with a slot; and a partition positioned between each pair of the inner and outer seal elements and slidably engaged with the slots in the seal elements, wherein each of the seal elements includes a ring seal around each end of the elongate cylindrical body.