Pressure isolation valve and bypass valve; and filter head assem

Details Pressure isolation valve and bypass valve; and filter head assem Pressure isolation valve and bypass valve; and filter head assem

1994-10-24

1996-03-26

Savage, Matthew O.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Fluid pressure responsive

210133, 210340, B01D 35143, B01D 35147

Patent

active

055017916

ABSTRACT:
A filter head adapted for use with spin-on filters is shown. The filter head carries a spring load piston which is normally biased to close a filter bypass channel. A fluid pressure increase caused by a clogged filter causes the piston to move opening the bypass and at the same time opening a signal channel between a source of fluid pressure and a signal outlet.

REFERENCES:
patent: 3474906 (1969-10-01), Tennis
patent: 3819052 (1974-06-01), Firth
patent: 3827558 (1974-08-01), Firth
patent: 3847819 (1974-11-01), Firth
patent: 4369113 (1983-01-01), Stifelman
patent: 4428834 (1984-01-01), McBroom et al.
patent: 4480160 (1984-10-01), Stifelman
patent: 4512882 (1985-04-01), Fischer et al.
patent: 4522712 (1985-06-01), Fischer et al.
patent: 4615800 (1986-10-01), Stifelman et al.
patent: 4717472 (1988-01-01), Oberg
patent: 4883083 (1989-11-01), Fisher et al.

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