Motors: expansible chamber type – With motive fluid valve – Contracting chamber exhaust valve controlled by expanding...
Patent
1986-08-21
1987-11-17
Michalsky, Gerald A.
Motors: expansible chamber type
With motive fluid valve
Contracting chamber exhaust valve controlled by expanding...
91446, 91454, 13759618, 1375962, F15B 13042
Patent
active
047065478
ABSTRACT:
The invention relates to a coaxial multi-function insertable hydraulic distribution cartridge valve including various inlet and outlet ports (P1,X1,R1,S1,s1,D1,B1), a first compensating slide (N1) urged towards a position of full opening by a first spring (r1), a second internal slide (J1), concentric with the first, providing the principal regulation of the oil inlet flow rate, urged by a second spring (r2), against the control pressure delivered by the inlet port (X1), towards the position of closure of the communication between the oil pressure inlet port (P1) and the outlet port (R1) delivering the actuating pressure, and isolating (C) check valve and a backfeed (G) check valve, which are urged by a third spring (r3) to return these two check valves into the position of closure of communication towards (S1) for the check valve (C) and towards (T1) for the check valve (G), a third balancing slide (E1) urged by a fourth spring (r4), against the pressure delivered by the balancing pressure port (B1) and the pressure delivered by the actuating outlet port (R1), towards the position of closure of the communication between the actuating outlet port (R1) and the port (T1) for return of oil to the reservoir.
REFERENCES:
patent: 3283779 (1966-11-01), Rosaen
patent: 4475442 (1984-10-01), Breeden
patent: 4569272 (1986-02-01), Taylor et al.
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