Robert A Huebner

US Patent:

52792056, Jan 18, 1994

Filed:

Dec 15, 1992

Appl. No.:

7/990969

Inventors:

Guy C. Carlson - Minooka IL
William K. Engel - Peoria IL
Robert J. Huebner - Peoria IL
Donald H. Sherman - Morton IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F01B 1300

US Classification:

91485

Abstract:

Axial piston fluid translating units commonly experience undesirable shaft deflections and barrel tilting during operation. A fluid translating unit includes a barrel plate interposed the end of a barrel and a porting surface defined within a housing thereof. The barrel plate is axially spaced from an end of the barrel and is in face sealing engagement with the porting surface. The barrel plate defines a plurality of fluid ports, each communicating between one of a plurality of barrel cylinder bores and the porting surface. In one aspect a plurality of counterbores are provided in the barrel in surrounding relation to the fluid ports. A plurality of seal rings having a sealing end defining an annular seal face of a predetermined width for face sealing engagement with the barrel plate. The seal rings are each disposed in one of the counterbores in circumferential sealing relation of a predetermined length which is no greater than the width of the sealing face. A plurality of annular springs are disposed in the counterbores for urging the seal rings into sealing engagement with the other of the barrel and the barrel plate.