Fluid handling – Liquid level responsive or maintaining systems – With control fluid connection at desired liquid level
Patent
1984-05-29
1985-05-07
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
With control fluid connection at desired liquid level
73290R, 137842, 141198, 222 64, F15C 114, F16K 2118
Patent
active
045151784
ABSTRACT:
A fluid amplifier for sensing the level of a liquid in a reservoir, storage tank or other container and for generating a differential in pressure signal in response to the static presence of the liquid level at a predetermined level. An inlet develops a liquid flow stream. A first passage of major cross-sectional dimensions is provided for delivering a major portion of the flow stream to the reservoir or storage tank. A second passage of minor cross-sectional dimensions is spaced laterally of the first passage for developing a small signal fluid power stream substantially parallel to the major supply stream. A sensor is responsive to the static presence of the liquid level at the predetermined level for altering the smaller fluid power stream from its substantially parallel flow condition to a condition in which it diverts and attaches to the major supply stream. A signal developing device is provided for receiving a fluid pressure signal of one magnitude when the fluid power stream is parallel to the major supply stream and of a second magnitude when the fluid power stream is diverted.
REFERENCES:
patent: Re29715 (1978-08-01), Richards
patent: 3561465 (1971-02-01), de Graaf
patent: 3703907 (1972-11-01), Richards
patent: 4202367 (1980-05-01), Roth et al.
patent: 4211249 (1980-07-01), Richards
patent: 4296996 (1981-10-01), Pataki et al.
patent: 4345618 (1982-08-01), Altman et al.
patent: 4444222 (1984-04-01), Yamagiwa
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