Vacuum line control valves

Details Vacuum line control valves Vacuum line control valves

1981-10-15

1984-11-06

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

F16K 31126

Patent

active

044806574

ABSTRACT:
A vacuum line control valve having a single vacuum input port and a pair of output ports to which vacuum is supplied alternately, each output port being vented to atmosphere when not at vacuum pressure. A reciprocating valve control member is carried by a resilient diaphragm which separates two internal chambers. A first valve control setting corresponds to the initial, rest position of the diaphragm. Differential pressures in the chambers first displace the diaphragm to the second valve control setting and then return it to the first. Frequency of alternation is determined by a bleed aperture between one output port and one chamber.

REFERENCES:
patent: 1501408 (1924-07-01), Lindstrom
patent: 2292401 (1942-08-01), Orre
patent: 2359508 (1944-10-01), Bergstedt
patent: 2379483 (1945-07-01), Hapgood
patent: 2664095 (1953-12-01), Magni

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