Device for adjusting the switching time of a valve member

Details Device for adjusting the switching time of a valve member Device for adjusting the switching time of a valve member

1986-06-09

1987-08-18

Michalsky, Gerald A.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

91443, 1375135, 137538, 13761417, 251207, F16K 31122

Patent

active

046871772

ABSTRACT:
The switching time in opening and closing a valve is determined by a closing throttle and an opening throttle which both together are arranged in series with a check valve. For closing the valve the check valve is opened thus making the opening throttle ineffective so that the closing speed is solely determined by the cross-section of the closing throttle. For opening the valve the check valve is closed so that the control pressure is decreased across the opening throttle defining a desired opening speed.

REFERENCES:
patent: 535813 (1895-03-01), Cooper et al.
patent: 3558100 (1971-01-01), Hulsey
patent: 3595265 (1971-07-01), Cryder et al.
patent: 3623509 (1971-11-01), Sesseler et al.
patent: 3631888 (1972-01-01), Anton et al.
patent: 3683959 (1972-08-01), Tsuji et al.
patent: 3938777 (1976-02-01), Foster et al.
patent: 4022113 (1977-05-01), Blatt
patent: 4588163 (1986-05-01), Christensen

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