Saddle bearing liner for axial piston pump

Details Saddle bearing liner for axial piston pump Saddle bearing liner for axial piston pump

2007-02-06

2007-02-06

Stashick, Anthony D. (Department: 3746)

Pumps

Expansible chamber type

Pump mounted in vertical tubular flow conduit removable as...

C417S222100

Reexamination Certificate

active

10473990

ABSTRACT:
A saddle bearing liner (30) for a variable displacement axial piston pump (10) includes two axially-spaced apart bearing surfaces (62, 64) with an offset central section (54) integrally joining them. A hollow projection (80) extends radially from the convex side of the pressure bearing section (50) and is received with a recess (82) of the housing (12) to locate the liner (30). The liner (30) has radially extending ledges (70, 72) which mate with surfaces (74, 76) of the housing (12) to inhibit skewing of the bearing liner (30) relative to the axis of the bearing surfaces (62, 64). The projection (80) is hollow and opens to the bearing surface (62) so that presurrized fluid from the housing (12) can be injected between the bearing surface (62) and the mating surface (22) of the swashblock (20). The projection (80) also prevents the liner (30) from rotating about the bearing surface axis.

REFERENCES:
patent: 3747476 (1973-07-01), Ankeny et al.
patent: 4627330 (1986-12-01), Beck, Jr.
patent: 4903577 (1990-02-01), Loffler
patent: 5709141 (1998-01-01), Ohashi et al.
patent: 6027250 (2000-02-01), Reubelt et al.
patent: 2002/0136475 (2002-09-01), Harimoto et al.
International Search Report, Form PCT/ISA/210, as issued by European Patent Office in Connection with PCT Application No. PCT/US02/09556.
Written Opinion, Form PCT/IPEA/408, as issued by United States Patent and Trademark Office in Connection with PCT Application No. PCT/US02/09556.

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