Measuring and testing – Liquid level or depth gauge – Float
Patent
1986-02-21
1989-04-18
Shoap, Allan N.
Measuring and testing
Liquid level or depth gauge
Float
73430, G01D 1112, G01F 2332
Patent
active
048215716
ABSTRACT:
The present invention relates to a damping device of the type comprising a housing (40) defining a sealed chamber (42) containing a viscous damping fluid such as silicone and receiving a blade capable of displacement relative to the housing. In accordance with the invention, the housing (40) and the blade (80) comprise respective series of fins (50, 51, 52, 53 and 90, 92, 94, and 96) which are interleaved. Thus, relative displacement of the blade inside the housing (40) is braked by a combination firstly of the controlled flow of fluid from one side of the blade to the other via interstices between the blade and the housing, and secondly by viscous friction between the interleaved fins. The invention also relates to a device for measuring the level of fuel in a motor vehicle fuel tank and including such a damping device.
REFERENCES:
patent: 916166 (1909-03-01), Kaplan
patent: 2266298 (1941-12-01), Bacon
patent: 2569311 (1951-09-01), Hoare et al.
patent: 3598208 (1971-08-01), Bronder
patent: 3854737 (1974-12-01), Gilliam
patent: 3915462 (1975-10-01), Bruns et al.
patent: 4229973 (1980-10-01), Hara
Jaeger
Scanlon Patrick R.
Shoap Allan N.
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