Vacuum regulator apparatus

Details Vacuum regulator apparatus Vacuum regulator apparatus

1988-04-07

1990-05-01

Chambers, A. Michael

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

1374925, 137509, 137557, 137907, F16K 3700

Patent

active

049210068

ABSTRACT:
Vacuum regulator apparatus comprising: a valve that in use is arranged to admit air to a vacuum system that in operation is at a sub-atmospheric pressure, the apparatus being so arranged that an increase in the pressure in the vacuum system tends to cause less air to be admitted to the vacuum system by the regulator apparatus, and vice versa; means responsive to the position of the said valve arranged to give a first signal if air is being admitted at more than a first predetermined rate and a second signal if air is being admitted at less than a second predetermined rate lower than the first; and pressure-responsive means arranged to give a third signal if the pressure in the vacuum system is outside a predetermined range.

REFERENCES:
patent: 1208392 (1916-12-01), Simmons
patent: 2631600 (1953-03-01), Flanagan
patent: 2877791 (1959-03-01), Rich
patent: 4198030 (1980-04-01), Jackson et al.
patent: 4366943 (1983-01-01), Licary
patent: 4616215 (1986-10-01), Maddalena
patent: 4708316 (1987-11-01), Cook

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