Motors: expansible chamber type – Three or more cylinders arranged in parallel radial or... – Cylinders parallel to rotation axis
Patent
1990-03-29
1992-02-04
Michalsky, Gerald A.
Motors: expansible chamber type
Three or more cylinders arranged in parallel radial or...
Cylinders parallel to rotation axis
417269, F01B 1304
Patent
active
050851276
ABSTRACT:
A problem with hydraulic displacement units of the axial piston type is the cavitation which occurs at the porting face of the cylinder block due to the conventional use of a bearing material which, because of its very nature, has a tendency to erode. A solution to this problem is provided by a hydraulic axial displacement pump or motor which comprises a housing (10), a rotatable cylinder block (18) in the housing (10) and including a plurality of bores (30), a piston (35) in each of the bores (30) and reciprocable therein upon rotation of the cylinder block (18), a valve member (12) having inlet and outlet ports (34) and in abutment with the cylinder block (18) wherein each of the bores (30) has a port (31) opening to the ports (34) in the valve member (12) to establish fluid communication therewith, and a porting face (63) on the cylinder block (18) about the ports to the bores (30) and abutting the valve member or endcap (12) formed of a hard, erosion resistant material, and at least one stabilization foot (65) extending from the cylinder block (18) toward the valve member (12) and formed of a bearing material. This configuration results in a pump or motor which avoids cavitation caused erosion in the porting face which in turn results in a longer life and more efficient operation of the pump or motor.
REFERENCES:
patent: Re32197 (1986-07-01), Self
patent: 3080854 (1963-03-01), Wiggermann
patent: 3169488 (1965-02-01), Galliger
patent: 3180275 (1965-04-01), Boulet
patent: 3204570 (1965-09-01), Firth et al.
patent: 3280758 (1966-10-01), Leeming et al.
patent: 3292553 (1966-12-01), Hann
patent: 3382793 (1968-05-01), Gantzer
patent: 3407744 (1968-10-01), Slimm
patent: 3487788 (1970-01-01), Thoma et al.
patent: 3585901 (1971-06-01), Moon, Jr. et al.
patent: 3611876 (1971-10-01), Day
patent: 3707034 (1972-12-01), Alger, Jr. et al.
patent: 3709107 (1973-01-01), Alger, Jr. et al.
patent: 3768378 (1973-10-01), Adams et al.
patent: 3803687 (1974-04-01), Alger, Jr. et al.
patent: 3954124 (1976-05-01), Self
patent: 4437389 (1984-03-01), Kline
patent: 4550645 (1985-11-01), Beck, Jr.
patent: 4799419 (1989-01-01), Krause
Michalsky Gerald A.
Sundstrand Corporation
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