Banded ceramic valve and/or port plate
OwnerJohn P. MacHarginventor
Life of this patent
Estimating the term…
Abstract
Valve and/or port plates incorporating or formed entirely of ceramic can each be provided with a reinforcing band. The band, which can optionally be metal, can be placed around the plate to provide additional strength to the plate, thereby allowing for a reduction in the overall diameter and/or thickness of the plates and, thus, the use of less ceramic material. The band can hold the plate in compression and/or be glued to hold the band in place.
Claims16
A rotary axial piston pump comprising:
- a housing;
- a swash plate, the swash plate having an inclined surface;
- a rotor assembly positioned adjacent the swash plate, the rotor assembly comprising a rotor-drum having at least one cylinder bore disposed therein, and having piston(s) disposed within the respective cylinder bore(s), the pistons having a ball-shaped end extending from the cylinder bore(s);
- at least one slipper interposed between the swash plate and the rotor-drum, the slipper(s) comprising socket joints for accommodating the piston ball-shaped end(s) therein, the slipper(s) having a swash plate interface surface in contact with the swash plate inclined surface and optionally formed from a ceramic material;
- a port plate positioned adjacent an end block disposed in the housing open end;
- and
- a valve plate interposed between the port plate and the rotor-drum;
- wherein the port and valve plates each have a ceramic surface at an interface thereof;
- and wherein a reinforcing band is provided surrounding at least a portion of one of the plates to hold the plate in compression.
A set of valve and port plates, wherein each of the plates includes a ceramic interface surface for rotatably sliding engagement with the other plate, further comprising a reinforcing band radially surrounding one of the ceramic interface surfaces to hold the surface in compression.
Dependencies are inferred from the claim text.