Series spool pressure regulator arrangement for a double-acting

Details Series spool pressure regulator arrangement for a double-acting Series spool pressure regulator arrangement for a double-acting

1987-10-16

1989-06-06

Garrett, Robert E.

Motors: expansible chamber type

With motive fluid valve

Relatively movable serial valves

91468, 91165, 1371163, 13750526, F15B 13042, F16K 31122

Patent

active

048360899

ABSTRACT:
A regulator arrangement (14) for a servo system (10) having a first stage valve spool piston (44) for developing a primary operational fluid (P.sub.c) and a second stage valve spool piston (70) for developing secondary operational fluid P.sub.cr having a constant fluid pressure. A control valve (109) selectively connects a first chamber (100) of a cylinder housing bore to either the primary operational fluid pressure P.sub.c or a reference fluid pressure P.sub.B to develop a fluid pressure P.sub.x in first chamber (100) while a second chamber (102) is connected to the secondary operational fluid (P.sub.cr). A load piston (96) responds to a pressure differential (P.sub.x -P.sub.cr) by moving to either expand or contract the second chamber (102) and produce a fluid pressure (P.sub.crx) in the secondary operational fluid. The fluid pressure P.sub.crx is communicated to the second valve piston (70) to correspondingly allow either additional primary fluid (P.sub.c) to flow to the secondary chamber ( 102) or release secondary operational fluid until the secondary operational fluid pressure returns to P.sub.cr.

REFERENCES:
patent: 3665810 (1972-05-01), Parrett
patent: 3884254 (1975-05-01), Kogure
patent: 3920040 (1975-11-01), Powell
patent: 4112825 (1978-09-01), Murata
patent: 4244275 (1981-01-01), Smilges
patent: 4537220 (1985-08-01), Anderson
patent: 4590968 (1986-05-01), Wolfges
patent: 4748896 (1988-06-01), Ott et al.

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