Remote valve operators

Details Remote valve operators Remote valve operators

1984-08-28

1986-02-11

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

60476, F15B 13042

Patent

active

045693722

ABSTRACT:
A remote valve positioning apparatus is provided in which a valve spool is resiliently loaded at each end to a normal position, hydraulic fluid is delivered selectively to one end or the other of the valve spool at a fixed flow and the valve is positioned by pressure drop caused by the fixed flow over an orifice proportional to the stroke of the valve spool.

REFERENCES:
patent: 2902885 (1959-09-01), Wright
patent: 3058038 (1962-10-01), Stedman, Jr. et al.
patent: 3408035 (1968-10-01), Lathrop et al.
patent: 3409036 (1968-11-01), Sherburne
patent: 3410308 (1968-11-01), Moog, Jr. et al.
patent: 3500380 (1970-03-01), Jessee
patent: 3590873 (1971-07-01), Duff
patent: 3665962 (1972-05-01), Dornseiffen
patent: 3789876 (1974-02-01), Kempton et al.
patent: 3839662 (1974-10-01), N'Guyen Van
patent: 4137825 (1979-02-01), Leonard

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