Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Reexamination Certificate
2006-01-30
2008-08-19
Enad, Elvin (Department: 2832)
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
C200S0830SA
Reexamination Certificate
active
07414207
ABSTRACT:
Commercially available filter-monitoring switches suffer from problems related to over sensitivity and reliability. Accordingly, the present inventors have devised, among other things, various embodiments of filter-monitoring switches and related components, subassemblies, methods, and systems. One exemplary filter-monitoring switch includes a diaphragm operably couple to move a conductive element back and forth between a pair of fixed terminals in response to pressure differences across the diaphragm. The conductive element is mounted to an insulative pin of substantially uniform width, and the terminals include leaf contacts that constantly engage the pin or the contacts throughout normal operation of the switch, thereby reducing flexure of the contacts and effectively providing a self-cleaning and self-healing electrical switch.
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International Search Report and Written Opinion for PCT/US2006/003263, Jun. 2, 2006; 10 pages.
“International Search Report for corresponding PCT Application No. PCT/US2006/003263”, (Jun. 2, 2006), 2 pgs.
Berry, III Charles H.
Heuthorst Joseph P.
Lockert, Jr. Michael J.
Enad Elvin
Engineered Products Company
Klaus Lisa
Schwegman Lundberg & Woessner, P.A.
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