Fluid handling – Pressure modulating relays or followers – With counter-balancing pressure feedback to the modulating...
Patent
1980-01-17
1981-05-19
Nilson, Robert G.
Fluid handling
Pressure modulating relays or followers
With counter-balancing pressure feedback to the modulating...
1371165, 1376275, 137DIG8, G05D 1606
Patent
active
042678552
ABSTRACT:
A pneumatic vacuum regulator (10) is disclosed for supplying a modulated vacuum output signal proportional to an input pressure signal. Upper (18) and lower (20) diaphragms mounted within a housing (14, 16, 36), cooperate therewith to define a fluid chamber (46), a control chamber (58), and an atmospheric vent (104). A spacer (22) between the diaphragms allows the diaphragms to move as a unit in response to sensing subatmospheric pressure in the fluid chamber, atmospheric pressure on one side of the upper diaphragm, and fluid pressure in the control chamber. A valve member (92) is integrally molded into the upper diaphragm and is engageable with an atmospheric valve seat (96) formed around an opening (98) in an upper diaphragm plate (88). A vacuum valve seat (52) is aligned with opening (98) such that the valve member is engageable with either or both valve seats, thus permitting pressure in the fluid chamber to be modulated proportional to the pressure in the control chamber.
REFERENCES:
patent: 3125111 (1964-03-01), Daly
patent: 3411522 (1968-11-01), Golden
patent: 3575190 (1971-04-01), Puster
patent: 3739797 (1973-06-01), Caldwell
patent: 3818923 (1974-06-01), Puster
patent: 3915136 (1975-10-01), Caldwell
patent: 4173204 (1979-11-01), Takayama
patent: 4192453 (1980-03-01), Frankenberg
Crist E. C.
Eaton Corporation
Johnston R. A.
McCloskey R. J.
Nilson Robert G.
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