Pump station construction

Claim 2

A pump station assembly for sewage handling and the like, wherein the assembly is mounted in a manhole, comprising: a. a deck plate horizontally disposed and fitted on the upper periphery of the manhole; b. vertical shaft, centrifugal pump unit mounted on said deck plate; c. said pump unit including motor means mounted on and extending upwardly from said deck plate; d. centrifugal pump means mounted under and extending downwardly from said deck plate; e. said pump means including volute means separate from but connected directly to the underside of said deck plate, and inlet and outlet means depending from said volute means; and f. said pump means being driven from said motor means through said deck plate.

Claim 3

The pump station assembly of claim 1, further characterized by and including, a vacuum priming system for said pump unit; said vacuum priming system being mounted in a housing enclosing said motor means and mounted above said deck plate.

Claim 4

The pump system assembly of claim 1, further characterized by and including, thermostat control means effective to cause said pump unit to drain all liquid contained therein when the liquid contained in said pump unit falls below a predetermined temperature.

Claim 5

The pump station assembly of claim 3, further characterized in that said thermostat means senses the temperature of the liquid and controls a solenoid vent valve which allows air into said pump unit to drain said pump Unit.

Claim 6

The pump system of claim 1, further characterized by and including, thermostat control means effective to cause said pump unit to drain all liquid contained therein when the temperature of the surrounding structural surface falls below a predetermined level.

Claim 7

The pump station assembly of claim 1 further characterized by and including: a high-level displacement switch and a low-level displacement switch; said high-level displacement switch positioned so as to cause said pump unit to operate when the liquid level is just below said volute; and said low-level displacement switch positioned so as to stop said pump unit when said liquid level falls below a predetermined point in the manhole.

Claim 8

The pump station assembly of claim 4, further characterized in that said solenoid vent valve opens automatically to drain all the liquid contained within said pump unit during a power failure.

Claim 9

A pump station assembly for sewage handling and the like, wherein the assembly is mounted in a manhole, comprising; a. a deck plate horizontally disposed, having an aperture therein, fitted on the upper periphery of the manhole; b. vertical shaft, centrifugal pump unit mounted on said deck plate; c. said pump unit including motor means mounted on and extending upwardly from said deck plate; d. centrifugal pump means mounted under and extending downwardly from said deck plate; e. said pump means including volute means, having an aperture therein, connected directly to the underside of said deck plate, said volute aperture being in vertical alignment with said deck plate aperture, and inlet and outlet means depending from said volute means; f. impeller means located within said volute being driven through said deck by said motor means; and g. said impeller means positioned with respect to said deck plate aperture and said volute aperture so as to permit said motor means and said impeller means to be lifted from said deck plate without disturbing said volute means and said inlet and outlet means.

Claim 10

A pump station assembly for sewage handling and the like, wherein the assembly is mounted in a manhole, comprising; a. a deck plate horizontally disposed, having an aperture therein, fitted on the upper periphery of the manhole; b. vertical shaft, centrifugal pump unit mounted on said deck plate; c. said pump unit including motor means mounted on and extending upwardly from said deck plate; d. centrifugal pump means mounted under and extending downwardly from said deck plate; e. said pump means including volute means, having an aperture therein, connected directly to the underside of said deck plate, said volute aperture being in vertical alignment with said deck plate aperture, and inlet and outlet means depending from said volute means; f. impeller means located within said volute being driven through said deck by said motor means; and g. said impeller means positioned with respect to said deck plate aperture and said volute aperture so as to permit said motor means and said impeller means to be lifted from said deck plate without disturbing said volute means and said inlet and outlet means.

Claim 11

The pump station assembly of claim 8, further characterized by and including: a. a vacuum priming system for said pump unit, said vacuum priming system being mounted in a housing enclosing said motor means and mounted above said deck plate; and b. said thermostat control means controls a solenoid vent valve which allows air to enter said pump unit and thereby drain said pump unit of all liquid contained therein when said contained liquid falls below said predetermined temperature.

Claim 12

In a pumping unit having a centrifugal pump, an operating motor, a vacuum priming pump for priming said centrifugal pump, the improvement comprising: a. thermostat control means effective to determine when the liquid contained within said pump unit falls below a predetermined temperature; b. said thermostat control means controls a solenoid vent valve which allows air to enter said pump unit and thereby drain said pump unit of all liquid contained therein when said contained liquid falls below said predetermined temperature.

Claim 13

In a pumping unit having a centrifugal pump, an operating motor, a vacuum priming pump for priming said centrifugal pump, the improvement comprising: a. thermostat control means effective to determine when the liquid contained within said pump unit falls below a predetermined temperature; b. said thermostat control means controls a solenoid vent valve which allows air to enter said pump unit and thereby drain said pump unit of all liquid contained therein when said contained liquid falls below said predetermined temperature.