Vacuum cut-off valve

Details Vacuum cut-off valve Vacuum cut-off valve

1977-08-08

1979-09-04

Cline, William R.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

1376275, 137DIG8, 60290, 123117A, F02P 510

Patent

active

041664760

ABSTRACT:
A vacuum cut-off valve for cutting off vacuum communication between an inlet port and an outlet port when the inlet vacuum increases above a predetermined vacuum level so that the outlet vacuum is maintained at a constant predetermined vacuum level. When the valve cutting operation between the inlet port and the outlet port is insufficient and vacuum leakage results, atmospheric pressure is admitted to the outlet port to thereby maintain the outlet vacuum at the constant predetermined level.

REFERENCES:
patent: 2652847 (1953-09-01), Segebarth
patent: 3055678 (1962-09-01), Alfieri
patent: 3766933 (1973-10-01), Nicholson, Jr.
patent: 3921666 (1975-11-01), Leiber
patent: 3933166 (1976-01-01), Gould et al.
patent: 3948045 (1976-04-01), Budinski et al.
patent: 3955364 (1976-05-01), Lewis
patent: 3996955 (1976-12-01), Kawabata
patent: 4033125 (1977-07-01), Inada et al.
patent: 4050423 (1977-09-01), Inada et al.
patent: 4052996 (1977-10-01), Burrus
patent: 4064894 (1977-12-01), Ludwig

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