US3630637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage-pumping station
Assignee: ENPO INDUSTRIES Inc A CORP OF
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Filing: 1970-01-22
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Granted: 1971-12-28
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Expires: 1990-01-22
Abstract
Abstract A sewage-pumping station including a sump and above the sump a machinery compartment. A pair of sewage pumps and a priming chamber for holding sewage are provided in the machinery compartment. A feed conduit extending from adjacent the base of the sump into the priming chamber provides for the flow of sewage into the priming chamber. A vacuum pump also mounted in the machinery compartment when actuated produces a subatmospheric pressure in the priming chamber effective to draw sewage from the sump into the priming chamber. The pair of sewage pumps have their inlet sides connected to the priming chamber and sewage in the priming chamber is used to prime these pumps.
Inventors
- 👤 Fred J Repp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:41
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/04; F04D9/041; F04D13/00; F04D13/12; F04D13/14; F04D29/00; F04D29/60; F04D29/605; F04D29/606
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
257 words
A sewage-pumping station comprising a sump having a bottom and sides, a supply conduit connecting with the sump at a point elevated above the bottom of the sump for the admission of sewage thereinto, an overflow conduit connecting with the sump at a point elevated above the connection of said supply conduit with the sump, casing structure forming a machinery compartment disposed above the sump, a discharge conduit leading into said machinery compartment, a sewage pump mounted in said machinery compartment having an inlet side and a discharge side, said discharge side being connected to said discharge conduit, a priming chamber having sides and closed off at its bottom disposed in said machinery compartment, a feed conduit having a lower end connecting with the sump at a point below the connection of said supply conduit with the sump and an upper end opening to the priming chamber at a point elevated from the bottom thereof, said priming chamber being adapted to hold a body of sewage for priming the sewage pump, said sewage pump having its inlet side connected to said priming chamber adjacent the base of the priming chamber and below the top of said feed conduit, a vacuum pump mounted in said machinery compartment and means connecting said vacuum pump to said priming chamber whereby operation of the vacuum pump produces a vacuum in said priming chamber, and means responsive to the degree of vacuum in the priming chamber for starting and stopping the vacuum pump thereby to maintain the vacuum in the priming chamber.
Claim 2
Dependent Claim
257 words
A sewage-pumping station comprising a sump having a bottom and sides, a supply conduit connecting with the sump at a point elevated above the bottom of the sump for the admission of sewage thereinto, an overflow conduit connecting with the sump at a point elevated above the connection of said supply conduit with the sump, casing structure forming a machinery compartment disposed above the sump, a discharge conduit leading into said machinery compartment, a sewage pump mounted in said machinery compartment having an inlet side and a discharge side, said discharge side being connected to said discharge conduit, a priming chamber having sides and closed off at its bottom disposed in said machinery compartment, a feed conduit having a lower end connecting with the sump at a point below the connection of said supply conduit with the sump and an upper end opening to the priming chamber at a point elevated from the bottom thereof, said priming chamber being adapted to hold a body of sewage for priming the sewage pump, said sewage pump having its inlet side connected to said priming chamber adjacent the base of the priming chamber and below the top of said feed conduit, a vacuum pump mounted in said machinery compartment and means connecting said vacuum pump to said priming chamber whereby operation of the vacuum pump produces a vacuum in said priming chamber, and means responsive to the degree of vacuum in the priming chamber for starting and stopping the vacuum pump thereby to maintain the vacuum in the priming chamber.
Claim 3
Dependent Claim
53 words
The pumping station of claim 1, wherein screening means is mounted within the priming chamber divIding said chamber into two compartments, and said means controlling operation of the vacuum pump includes a float located in one of said compartments, said upper end of said feed conduit being in the other of said compartment.
Claim 4
Dependent Claim
103 words
The pumping station of claim 1, which further comprises another sewage pump mounted in said machinery compartment having an inlet side connected to said priming chamber adjacent the base of the pump and a discharge side connected to said discharge conduit, sewage level sensing means operable to sense the level of sewage in said sump, and pump control means connected to said sensing means for starting up the sewage pumps on a rise in the level of sewage in said sump, said pump control means including an alternating switch means operable to actuate said pumps alternately on successive startups of the sewage pumps.
References Cited (Backward Citations)
FR530791A
Cited
US1840257A
Cited
US1910775A
Cited
US1964034A
Cited
US2461925A
Cited
US3247864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |