Patent US3972647A successfully refreshed from Google Patents.
US3972647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen for intake of emergency sump pump
Assignee: Individual
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Filing: 1974-09-09
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Granted: 1976-08-03
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Expires: 1994-09-09
Abstract
Abstract An emergency sump pump is employed in a sump from which the liquid is normally removed by a main pump. The main pump turns on when the liquid rises to an upper level and turns off when the liquid drops to a lower level. The emergency pump has a vertical intake conduit which opens at the bottom below the lower level. This conduit is surrounded by a tube which has openings in areas below the lower level and above the upper level. The tube is solid between those two levels and also is solid above the upper area of openings.
Inventors
- 👤 Karl O. Niedermeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:04
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/70; F04D29/708; F04B; F04B49/00; F04B49/02; F04B49/025; F04B49/10; F04D15/00; F04D15/02; F04D15/029
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
171 words
In a pump apparatus including a pump having a body, and power means for driving the pump, said pump having an intake opening and used to remove liquid from a sump, bilge, or the like wherein liquid accumulates with the liquid normally being between predetermined limits of height, and a screen device enclosing said intake opening for restricting access of floating debris to said opening, the improvement comprising: said screen device comprising a tube having upper and lower ends, the upper end being affixed to said body with the tube extending downwardly therefrom, said tube having four portions in vertical arrangement, the uppermost of the portions being solid, the next lower portion having openings therein, the then next lower portion being solid, and the lowermost of the four portions having openings therein, said pump having an intake conduit extending from said body down through said tube, said conduit defining said intake opening adjacent the lower end of the tube, said body forming a closure for the upper end of the tube.
Claim 2
Dependent Claim
171 words
In a pump apparatus including a pump having a body, and power means for driving the pump, said pump having an intake opening and used to remove liquid from a sump, bilge, or the like wherein liquid accumulates with the liquid normally being between predetermined limits of height, and a screen device enclosing said intake opening for restricting access of floating debris to said opening, the improvement comprising: said screen device comprising a tube having upper and lower ends, the upper end being affixed to said body with the tube extending downwardly therefrom, said tube having four portions in vertical arrangement, the uppermost of the portions being solid, the next lower portion having openings therein, the then next lower portion being solid, and the lowermost of the four portions having openings therein, said pump having an intake conduit extending from said body down through said tube, said conduit defining said intake opening adjacent the lower end of the tube, said body forming a closure for the upper end of the tube.
Claim 3
Dependent Claim
21 words
In a pump apparatus as set forth in claim 1, including removable cover means for the lower end of the tube.
Claim 4
Dependent Claim
188 words
In a pump apparatus including an emergency pump having a body, power means for driving said emergency pump and means for mounting said emergency pump, said pump having an intake opening and being used to remove liquid from a sump, bilge, or the like wherein liquid accumulates with the liquid normally being between predetermined limits of height, and a screen device enclosing said intake opening for restricting access of floating debris to said opening, and employed as an emergency apparatus to back up a primary sump pump which normally operates to maintain the liquid between said limits of height, the improvement wherein said device comprises a tube having upper and lower ends, and two portions between said ends, the uppermost of the two portions being solid and extending throughout said vertical height, the lowermost of said two portions having openings therein, said tube having a third portion above said uppermost of said two portions, the third portion having openings therein, said emergency pump having an intake conduit extending from said body down through said tube, said conduit defining said intake opening adjacent the lower end of the tube.
Claim 5
Dependent Claim
188 words
In a pump apparatus including an emergency pump having a body, power means for driving said emergency pump and means for mounting said emergency pump, said pump having an intake opening and being used to remove liquid from a sump, bilge, or the like wherein liquid accumulates with the liquid normally being between predetermined limits of height, and a screen device enclosing said intake opening for restricting access of floating debris to said opening, and employed as an emergency apparatus to back up a primary sump pump which normally operates to maintain the liquid between said limits of height, the improvement wherein said device comprises a tube having upper and lower ends, and two portions between said ends, the uppermost of the two portions being solid and extending throughout said vertical height, the lowermost of said two portions having openings therein, said tube having a third portion above said uppermost of said two portions, the third portion having openings therein, said emergency pump having an intake conduit extending from said body down through said tube, said conduit defining said intake opening adjacent the lower end of the tube.
Claim 6
Dependent Claim
50 words
In a pump apparatus as set forth in claim 3, wherein said tube has a fourth portion above said third portion, the fourth portion being solid, wherein said body forms a closure for the upper end of the tube, and including cover means for the lower end of the tube.
Claim 7
Dependent Claim
23 words
In a pump apparatus as set forth in claim 4, wherein said cover means for the lower end of the tube is removable.
Claim 8
Dependent Claim
20 words
In a pump apparatus as set forth in claim 4, wherein said tube and cover means are formed of plastic.
Claim 9
Dependent Claim
36 words
In a pump apparatus as set forth in claim 3, wherein said tube and conduit extend approximately to the bottom of said sump, and said pump and power means are positioned above said limits of height.
Claim 10
Dependent Claim
36 words
In a pump apparatus as set forth in claim 3, including means secured to the unit for supporting said unit in said sump, said means permitting adjustment of the height of the unit in the sump.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |