Thin valve plate for a hydraulic unit

Details Thin valve plate for a hydraulic unit Thin valve plate for a hydraulic unit

1984-04-27

1985-11-05

Freeh, William L.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Cylinders parallel to rotation axis

291567R, 291564R, B23P 1560, B21K 120, B21K 124

Patent

active

045506450

ABSTRACT:
A thin valve plate for use in an axial piston hydraulic unit wherein valve plate ports are provided with slot shaped extensions passing through the valve plate to provide limited initial fluid communication between cylinder block ports and valve plate ports and wherein the thickness of the valve plate is no greater than one half the width of the slots. Furthermore, such valve plate facilitates economical manufacture wherein the slots and valve plate ports can be stamped in a hardened steel disk.

REFERENCES:
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patent: 2297518 (1942-09-01), Wegerdt
patent: 2633104 (1953-03-01), Lauck et al.
patent: 2708879 (1955-05-01), Van Meter
patent: 2847984 (1958-08-01), Gallant
patent: 3186352 (1965-06-01), Anderson
patent: 3286647 (1966-11-01), Lambeth
patent: 3416312 (1968-12-01), Margolin
patent: 3709107 (1973-01-01), Alger
patent: 3904318 (1975-09-01), Born
patent: 3996891 (1976-12-01), Gostomski
patent: 4300273 (1981-11-01), Lockart
patent: 4437389 (1984-03-01), Kline

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