Positive displacement pump

Details Positive displacement pump Positive displacement pump

1981-11-12

1983-11-01

Freeh, William L.

Pumps

Inertia liquid piston

Movable confining means

F04F 700

Patent

active

044127863

ABSTRACT:
This invention relates to a positive displacement pump. The pump utilizes a source of rotary motion in the back and forth, clockwise, counterclockwise direction. The rotary oscillatory motion drives an annular piston weight mass in a toroidal rotary track, back and forth within the track in combination with at least a pair of one-way valves to pump fluid through the pump. Specially designed electric motors that rock back and forth, without a 360.degree. rotation, for example, may be coupled to a positive displacement pump of this invention. In the medical profession, this pump may be used to pump liquids at a very slow, precise rate to transmit, for example, a variety of medications into a patient.

REFERENCES:
patent: 2645184 (1953-07-01), Lowe
patent: 2969761 (1961-01-01), Youtie
patent: 3116695 (1964-01-01), Faller
patent: 3289594 (1966-12-01), Thiele
patent: 3737253 (1973-06-01), Foote
patent: 4370101 (1983-01-01), Horst

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