Flexible wall pump

Details Flexible wall pump Flexible wall pump

1976-11-16

1978-09-05

Freeh, William L.

Pumps

Expansible chamber type

Bellows-type chamber

417480, 417541, F04B 4500, F04B 1100

Patent

active

041116160

ABSTRACT:
A sludge pump which includes successive inlet, work and outlet chambers interconnected by one-way valves. Means is provided to periodically vary the volume of the work chamber thereby to induce transfer of fluid through the work chamber from the inlet to the outlet chamber. Also disclosed is a method of removing sludge from a sludge collection pit by periodic variation of the volume of an enclosed chamber in communication with the pit and with a chosen disposal site.

REFERENCES:
patent: 16373 (1857-01-01), Burnham
patent: 119996 (1871-10-01), Randall
patent: 154149 (1874-08-01), Paget
patent: 348361 (1886-08-01), Van Order
patent: 562285 (1896-06-01), Delpeyrou
patent: 1538166 (1925-05-01), Cass
patent: 1610473 (1926-12-01), Reybold, Jr. et al.
patent: 2748606 (1956-06-01), Cornelius

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