Cylinder pump having an air sensor activated reversing valve

Details Cylinder pump having an air sensor activated reversing valve Cylinder pump having an air sensor activated reversing valve

1987-09-25

1988-10-25

Croyle, Carlton R.

Pumps

Motor driven

Fluid motor

91308, F04B 1700, F01L 2502

Patent

active

047800658

ABSTRACT:
The present invention relates to an improved cylinder pump. The cylinder pump includes air hoists enabling the entire pump assembly to be lifted so that a container may be placed thereunder and thereafter the air hoists may be biased downwardly so that the follower plate of the pump mechanism will bear down on top of the liquid contained within the container. Thereafter, the air cylinder of the pump is activated and reciprocated up and down through the provision of a four port reversing valve activated through the use of air sensors to cause the pump to pump fluid out of the container while the downward bias of the air hoists keeps the follower plate in contact with the surface of the liquid within the container. By separating the air cylinder actuator for the pump mechanism from the four port reversing valve thereof, improved reliability and quietness are attained.

REFERENCES:
patent: 2157367 (1939-05-01), Warner et al.
patent: 4213298 (1980-07-01), Milgram
patent: 4679989 (1987-07-01), Harrman et al.

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