Pumps – Condition responsive control of pump drive motor – Responsive to accumulation of pumped liquid in receiver
Patent
1981-09-11
1983-12-20
Look, Edward K.
Pumps
Condition responsive control of pump drive motor
Responsive to accumulation of pumped liquid in receiver
137389, 137391, 417 40, F04B 4900
Patent
active
044214596
ABSTRACT:
A fluid level control apparatus for a fluid reservoir and comprising a weatherproof housing having a plurality of micro switches mounted therein, the interior of the housing being in communication with the fluid reservoir, a reciprocal rod member extending between the interior of the housing and the fluid reservoir and operably connected with the micro switches for actuation thereof upon reciprocation of the rod, a diaphragm secured to the reciprocal rod and flexible thereby, a helical spring acting against the diaphragm for providing a preselected constant force thereagainst in one direction, a pair of in-line weight members suspended from the reciprocal rod outboard of the diaphragm and calibrated in relation to the physical characteristics of the fluid and force of the spring for counterbalancing of the spring to maintain the diaphragm in a neutral position during normal fluid level conditions within the fluid reservoir, the combined weights of the weight members being variable upon the fluctuation of the fluid level beyond preselected highs and lows for reciprocation of the rod to actuate the micro switches, the micro switches being operably connected with fluid discharge pumping equipment and fluid inlet apparatus to control the supply of fluid to the reservoir and discharge fluid therefrom.
REFERENCES:
patent: 2941712 (1960-06-01), Cook
patent: 3279380 (1966-10-01), Clark
patent: 3717421 (1973-02-01), Schaefer
patent: 4001533 (1977-01-01), Conery et al.
patent: 4081638 (1978-03-01), Thorn et al.
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