Pneumatic valve with slow start and quick exhaust

Details Pneumatic valve with slow start and quick exhaust Pneumatic valve with slow start and quick exhaust

1993-10-22

1994-08-16

Nilson, Robert G.

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

137629, F16K 31122

Patent

active

053377885

ABSTRACT:
A pneumatic valve that has slow start and quick exhaust features and includes a housing structure defining a main flow passage between a supply inlet and a system outlet and a by-pass flow passage around a main valve in the main flow passage, a control valve that controls flow through the by-pass flow passage, an adjustable restriction in the by-pass flow passage, and an exhaust valve member that opens or closes an exhaust opening to the main flow passage.

REFERENCES:
patent: 2129938 (1938-09-01), Johnson
patent: 3458769 (1969-07-01), Stampfli
patent: 3460798 (1969-08-01), Carsten
patent: 3473570 (1969-10-01), Herion
patent: 3742984 (1973-07-01), Wilkins
patent: 3801063 (1974-04-01), Holmes et al.
patent: 4519422 (1985-05-01), Cohen
patent: 4615354 (1986-10-01), Bianchi
patent: 4624441 (1986-11-01), Kreitchman et al.
patent: 4799645 (1989-01-01), Kramer et al.
patent: 4921208 (1990-05-01), LaMarca

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