Indicating gauge with pressure relief valve

Details Indicating gauge with pressure relief valve Indicating gauge with pressure relief valve

1981-02-02

1983-02-15

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Bourdon

73431, 73715, G01L 1906, G01L 708

Patent

active

043733980

ABSTRACT:
A vehicular instrument or gauge of the type that has a sealed housing filled with an inert gas and a pressure responsive drive assembly for an indicating element such as a needle pointer. The housing is provided with a pressure relief valve to relieve excessive pressure within the housing that includes an inwardly facing integral frusto-conical projection with a central aperture in the back of the housing that receives a valve member which is actually a rivet covered by a flexible adhesive such as silicone rubber. The amount of adhesive and the housing wall area covered by adhesive determine, with the diameter of the head of the rivet, the pressure at which the rivet will be blown from the housing relieving internal pressure.

REFERENCES:
patent: 3388601 (1968-06-01), Ingham
patent: 3795148 (1974-03-01), Luich
patent: 3929020 (1975-12-01), Honkanen
patent: 3938393 (1976-02-01), Morgensen et al.
patent: 4096760 (1978-06-01), Bilbert et al.
patent: 4154116 (1979-05-01), Stahn et al.
patent: 4248080 (1981-02-01), Chuck

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