Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1993-11-02
1994-12-13
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200 83P, H01H 3534
Patent
active
053731271
ABSTRACT:
A pressure responsive switch is shown having an electrically conductive body 12 formed with a bore 24 which extends from one side through the body into recess 30 formed in the opposite side of the body. A switch assembly 34 is received and locked in the recess by crimping downwardly extending wall 32 of the body over the assembly. The switch assembly has a terminal 35 formed with a stationary contact 36 on an end thereof mounted electrically isolated from an annular disc seat member 40 which in turn receives an electrically conductive disc member 56 and a flexible diaphragm 60. An elongated piston 64 is receivable in a port 18 of a pump and is slidably received in bore 24 of body 12 with an end 70 placed contiguous to the diaphragm 60 and center of the disc member 56. A piston retainer ring 68 is disposed on piston 64 adjacent end 70 and located so that a selected preload is placed on the switch assembly which in turn maintains the piston 64 in a vertical orientation relative to a retainer shelf 66 against which the retainer ring reacts.
REFERENCES:
patent: 3616114 (1971-10-01), Hamaguchi
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patent: 5278367 (1994-01-01), Homol
Baumann Russell E.
Donaldson Richard L.
Grossman Rene E.
Texas Instruments Incorporated
Tolin Gerald P.
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