Hydraulic valve

Details Hydraulic valve Hydraulic valve

1995-11-21

1996-10-08

Nguyen, Hoang

Motors: expansible chamber type

Working member position responsive motive fluid control

Exhaust control

91418, 92118, F15B 1522, F01B 1504

Patent

active

055620183

ABSTRACT:
A check valve (10) for a hydraulic actuator (14), wherein the check valve (10) includes a valve seat (72) and a displaceable valve component (62) for controlling the flow of hydraulic oil through valve seat (72). Check valve (10) also includes a cylindrical body portion (50) and a cap (54). A slot (70) is formed in the sidewall of the cylinder (22) of the hydraulic actuator. A valve stem (66) of valve component (62) extends through slot (70) into the working chambers of cylinder (22) and into the path of movement of piston (16). Springs (80, 94) bias valve component (62) into its seated position. Engagement of piston (16) with the lower end (90) of valve stem (66) pivots valve component (62) and unseats the plug member of the valve to allow fluid communication between the working chambers of cylinder (22) and passageway (56).

REFERENCES:
patent: 3056165 (1962-10-01), Berrill et al.
patent: 4472942 (1984-09-01), Nomura et al.
patent: 4709805 (1987-12-01), Foster
patent: 4712467 (1987-12-01), Foster
patent: 4788821 (1988-12-01), Mienko et al.
patent: 4852351 (1989-08-01), Price
patent: 5050383 (1991-09-01), Nakaharai
patent: 5193661 (1993-03-01), Foster
patent: 5273405 (1993-12-01), Chalmers et al.
patent: 5315916 (1994-05-01), Foster
patent: 5325763 (1994-07-01), Foster

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