Signals and indicators – Alarms – Fluid flow
Patent
1975-10-24
1977-05-03
Queisser, Richard C.
Signals and indicators
Alarms
Fluid flow
116117C, 137557, G01L 1912
Patent
active
040207846
ABSTRACT:
A visual indicator for a fluid operated system comprising a housing defining a compartment therein and having a viewing portion. First and second fluid channels are provided in the housing and terminate at respective outputs which discharge to the compartment for applying fluid pressures thereto. A vane is rotatably mounted in the compartment and is responsive to applied fluid pressures so as to rotate between first and second positions. The vane has spaced apart output sealing members for substantially sealing the first and second outlets in accordance with the extreme rotary position assumed by the vane to thereby prevent fluid from flowing through a correspondingly sealed fluid channel. Indicia is provided on the surface of the vane so as to be selectively disposed in an indicating position for viewing through the viewing portion of the housing when the vane rotates to a corresponding one of its extreme positions.
REFERENCES:
patent: 1249120 (1917-12-01), Knight
patent: 2240492 (1941-05-01), De Juhasz
patent: 2676488 (1954-04-01), Wilcox
patent: 2921157 (1960-01-01), Stein
patent: 3354716 (1967-11-01), Wiebe et al.
patent: 3525263 (1970-08-01), Rupert
patent: 3532069 (1970-10-01), Morgan et al.
patent: 3623448 (1976-07-01), Resh et al.
Eslinger Lewis H.
Micro Pneumatic Logic Inc.
Queisser Richard C.
Yasich Daniel M.
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