Hydraulic switch

Details Hydraulic switch Hydraulic switch

1984-10-29

1985-09-10

Look, Edward K.

Pumps

Condition responsive control of pump drive motor

Responsive to accumulation of pumped liquid in receiver

200 84R, 200 84C, F04B 4900

Patent

active

045403422

ABSTRACT:
An hydraulic switch (10) for buoyingly controlling a secondary electrical switch (74) is disclosed. A float (68) is retained to move between a first position spaced apart from a vent opening (64) and a second position in sealing contact with vent opening (64). The electrical switch (74) changes state from an open condition to a closed condition as the float (68) approaches its second position.

REFERENCES:
patent: 1698693 (1929-01-01), Durdin
patent: 2483084 (1949-09-01), Callahan
patent: 2840000 (1958-06-01), Gramenzi
patent: 2844678 (1958-07-01), Nielsen
patent: 3316845 (1967-05-01), Schumann
patent: 3384218 (1968-05-01), West
patent: 3748066 (1973-07-01), Sully
patent: 3819297 (1974-06-01), East
patent: 3941073 (1976-03-01), Ridgeway
patent: 3963374 (1976-06-01), Sullivan
patent: 4081639 (1978-03-01), Tice

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