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Subassembly for a pressure switch

  • US 5,252,792 A
  • Filed: 09/06/1991
  • Issued: 10/12/1993
  • Est. Priority Date: 05/12/1989
  • Status: Expired due to Term
First Claim
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1. In a pressure switch of the type having a first cupped housing shell (12) with a fluid pressure sensing chamber (30) and a pressure responsive diaphragm (18) disposed therein and movable in response to changes in chamber pressure for actuating a switch, a sub-assembly removable from said first shell comprising:

  • (a) a support deck structure (68) having an aperture therethrough (100) and having a snap-acting switch (70) mounted on one side thereof, said switch having an actuator member (102) extending over said aperture; and

    ,(b) a spring capsule (66) removably assembled to said support deck structure including a preload spring (82) and a spring retaining cup member (88) registered against one end of said spring with the opposite end of said spring registered against a first portion (76) of an operating rod (28), said rod including other portions (78) thereof operative to limit movement of said rod in one direction with respect to said retaining cup member, said capsule being disposed on said deck on the side opposite said switch with said rod extending through said aperture and in registration with said switch actuator member, wherein said spring retaining cup member (88) is guided for sliding movement on said deck structure and retained thereon to preload said spring, said support deck with said spring capsule mounted thereon comprising a unit adapted for sliding assembly in said pressure switch first housing shell.

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