Pilot controlled valve for motor vehicle tank systems

Details Pilot controlled valve for motor vehicle tank systems Pilot controlled valve for motor vehicle tank systems

1994-09-15

1996-09-03

Chambers, A. Michael

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 44, 251 55, F16K 3112

Patent

active

055516645

ABSTRACT:
A pilot controlled valve for motor vehicle tank systems whose valve body consists of two parts (10, 12). In the first housing part (10) an inlet duct (14), an outlet duct (16), an annular valve seat (20) and an annular duct (18) surrounding the latter are formed. A valve closure member (24) is urged by a compression spring (26) into engagement with the valve seat (20) and on a side thereof remote from the valve seat defines a pressure equalizing space (22), which is formed in the second housing part and connects a pressure equalizing duct (52) with the inlet duct (14). By means of a pilot valve (30, 32) a flow path (42) between the pressure equalizing space (22) and the outlet duct (16) is controlled. In the pressure equalizing duct (52) a check valve (54, 56) is arranged adapted to shut in the direction of flow from the pressure equalizing space (22) to the inlet duct (14). This means that the valve is counter pressure resistant.

REFERENCES:
patent: 1511009 (1924-10-01), Spear
patent: 2958503 (1960-11-01), Vaughn
patent: 3206158 (1965-09-01), Bloomquist
patent: 3738607 (1973-06-01), Peruglia
patent: 3860073 (1975-01-01), Willms
patent: 3957244 (1976-05-01), Chauvigne
patent: 4332368 (1982-06-01), Woloszczuk
patent: 4450863 (1984-05-01), Brown
patent: 4930665 (1990-06-01), Devine
patent: 4934565 (1990-06-01), Helsey et al.

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