Fluid handling – Processes
Patent
1982-07-02
1984-11-27
Cohan, Alan
Fluid handling
Processes
13762411, 7386301, 7386383, 366140, B67D 502
Patent
active
044845936
ABSTRACT:
An automatic milk bulk tank lockout system (10) for use with a milk agitator (12) in a stationary bulk tank (14) and a pump (18) in a milk tank truck (16) for pumping milk out of the bulk tank (14) includes an electrical receptacle (22) adapted to supply power to the pump (18). A second timer switch (42) driven by a timing motor (28) is adapted to activate an agitator relay (46) to direct electrical current to the milk agitator (12) for a selected period of time. A third timer switch (44) also driven by the timing motor (28) selectively activates the receptacle (22) in automatic coordination with the operation of the milk agitator (12). The receptacle (22) is deactivated throughout the agitating period. Thereafter it is activated, whereby the pump (18) is not powered and milk cannot be pumped out of the bulk tank (14) before expiration of the selected agitating period. Preferably, the third timer switch (44) controls a receptacle relay (48) through which electrical current is directed to the receptacle (22), activating it.
REFERENCES:
patent: 2875590 (1959-03-01), Girton
patent: 2875591 (1959-03-01), Girton
patent: 3435247 (1969-03-01), Pfeiffer
patent: 3731494 (1973-05-01), Fleck
patent: 4292994 (1981-10-01), Johnson
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