1979-10-31
1981-10-06
Freeh, William L.
Pumps
Inertia liquid piston
F04F 702
Patent
active
042932858
ABSTRACT:
A pump for raising liquids through a height exceeding the barometric height has adjacent to an outlet of the pump a pumping chamber whereof one end is defined by a reciprocable center portion and a rubber annulus which is in non-sliding engagement with the center portion and with a peripheral wall of the chamber. Openings in the center portion are normally closed by a flap valve. The valve is held closed whenever the center portion is being moved in a direction to reduce the volume of the pumping chamber. Adjacent to an inlet to the pump, there is a chamber having a wall portion formed by an elastomeric sleeve which can store potential energy. Contraction of the sleeve is limited by a perforate metal support.
REFERENCES:
patent: 1047489 (1912-12-01), Beau
patent: 1941593 (1934-01-01), Billoca
patent: 2232678 (1941-02-01), Dickinson
patent: 2572977 (1951-10-01), Bodine
patent: 3307492 (1967-03-01), Selwood et al.
patent: 4097203 (1978-01-01), Selwood et al.
Simple Novel Pumps by K. Jenson, Publication Date Jun. 1976.
Freeh William L.
William R. Selwood Limited
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