Pumps – Condition responsive control of pump drive motor – Responsive to accumulation of pumped liquid in receiver
Patent
1981-03-23
1983-02-01
Cohan, Alan
Pumps
Condition responsive control of pump drive motor
Responsive to accumulation of pumped liquid in receiver
200 84R, F04B 4904
Patent
active
043713165
ABSTRACT:
To commence and maintain the operation of a bilge pump until the bilge area is sufficiently evacuated of excess bilge water, an electrically conductive ball is deposited in spanning relation across, and thus closes, a pair of circuit switch contacts, and then rolls off said contacts when the permissible lower level is reached to terminate the pump operation. This operational mode is, of course, repeated when the bilge is again filled to excess.
REFERENCES:
patent: 3941073 (1976-03-01), Ridgeway
patent: 4001533 (1977-01-01), Conery
patent: 4215975 (1980-08-01), Niedermeyer
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