Filter change indicator

Details Filter change indicator Filter change indicator

2008-04-22

2008-04-22

Allen, Andre J. (Department: 2855)

Measuring and testing

Fluid pressure gauge

Piston

C116S268000

Reexamination Certificate

active

11601508

ABSTRACT:
A fluid system pressure indicator is adapted for use in fluid systems having a filter element. The fluid system force indicator includes a housing partitioned to be exposed to the fluid system to provide transmission of a mechanical force between these partitioned environments to indicate the fluid pressure. This exterior shape change is such that it can be identified through tactile means not requiring visual identification.

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patent: 6190442 (2001-02-01), Redner
patent: 2004/0113803 (2004-06-01), Keown

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