Back to results
US 3,973,871 AGranted
Sump pump
AssigneeAteliers de Constructions Electriques de Charlerol (ACEC)
InventorPierre G. Hance
Life of this patent
Estimating the term…
Abstract
A sump pump comprising a sump having an inlet for the liquid to be pumped and a discharge outlet, the pump proper being received at the bottom of the sump and being driven by a vertically mounted shaft. The pump comprises two impellers each having two intakes, the impellers being mounted one above the other on the shaft and surrounded by two volutes each having one or two outlets which are connected to the inlets of a collecting manifold, the outlet of such manifold being connected to the outlet of the sump.
Claims4
A sump pump comprising:
- a. a sump casing;
- b. a single vertical driving shaft in said sump casing;
- c. an upper impeller and a lower impeller, said impellers being mounted in vertically spaced disposition on said shaft, each impeller having a pair of intake means;
- d. an upper volute and lower volute, each volute surrounding one impeller, each volute being of a spirally, radially, outwardly extending configuration with a radially innermost portion, a radially outermost portion and a radial gap between said innermost and outermost portions;
- e. at least one outlet in the radially outermost portion of each volute;
- f. said outlets and radially outermost portions being angularly staggered with respect to one another and so disposed that the outlet of said lower volute is immediately below said radial gap between said innermost and outermost portions of said upper volute;
- and
- g. a pair of pipe means, each pipe means being connected with one outlet, the one pipe means connected with the outlet of said lower volute extending through the region of said radial gap;
- whereby a radially compact arrangement is achieved.
6 more elements
Dependencies are inferred from the claim text.