Title:
WATER PUMPS AND MOTORS
Document Type and Number:
WIPO Patent Application WO/1993/010349
Kind Code:
A1
Abstract:
A water pump or motor comprises an outer casing (1), a cylinder block (7) which is rotatably mounted within the outer casing (1) and a plurality of piston assemblies (9). Each of the piston assemblies (9) is mounted within a respective piston bore in the cylinder block and comprises a piston (41) having a piston ball end supporting a slipper (42). An angled swash plate (12) is fixed in position relative to the rotatable cylinder block (7), against which the slippers (42) are pre-loaded. Each slipper (42) fits into and is held in place on the piston ball end by a retaining cap (47). The retaining caps (47) are each held in position on their respective piston ball end by means of a retaining ring (13) which is angled at the same angle as the angled swash plate. The retaining ring (13) has a plurality of apertures therein.
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Inventors:
SEABROOK COLIN (GB)
Application Number:
PCT/GB1992/002160
Publication Date:
May 27, 1993
Filing Date:
November 23, 1992
Export Citation:
Assignee:
FENNER CO LTD J H (GB)
International Classes:
F04B1/20; F04B1/12; (IPC1-7): A62C31/22; F03C1/06; F04B1/20
Foreign References:
| US3357363A | 1967-12-12 | |||
| US3246575A | 1966-04-19 | |||
| US3978772A | 1976-09-07 | |||
| US3865194A | 1975-02-11 | |||
| US4271909A | 1981-06-09 |
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