Pneumatic control apparatus for bi-manual security

Details Pneumatic control apparatus for bi-manual security Pneumatic control apparatus for bi-manual security

1980-09-29

1981-12-22

Nilson, Robert G.

Fluid handling

Systems

Multi-way valve unit

91424, 251 28, F16P 322

Patent

active

043065880

ABSTRACT:
The invention relates to a security pneumatic control apparatus comprising an OR cell, an AND cell, a capacitor, connected to the OR cell by means of a debit regulator, and a priority cell connected to the capacitor and to the AND cell. The AND cell comprises a valve member, for engaging two seats, and a diaphragm, for moving the valve member onto one of the two seats. The cross-sections of the diaphragm and of the last mentioned seat of the AND cell are S'.sub.3 and S'.sub.2 respectively. The priority cell comprises a valve member, for engaging two seats, and a diaphragm, for moving the valve member onto one of the two seats. The cross-sections of the diaphragm and of the last mentioned seat of the prioritary cell are S.sub.3 and S.sub.1 respectively. In the invention,

REFERENCES:
patent: 3047017 (1962-07-01), Brinkel
patent: 3605554 (1971-09-01), Philbrick
patent: 4063627 (1977-12-01), Wright

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