Patent US3743447A successfully refreshed from Google Patents.
US3743447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self coupling submersible pump
Assignee: PACO PUMPS Inc A CORP OF DE
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Filing: 1971-06-24
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Granted: 1973-07-03
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Expires: 1991-06-24
Abstract
Abstract A pump apparatus for catch basins or sumps includes a pump unit supported for up and down movement on fixed guide means. The pump, having a tubular outlet, tilts at an angle when being raised or lowered, and the outlet is vertically aligned with the inlet opening of a discharge pipe. When the pump outlet engages the discharge pipe opening as the pump unit is lowered, it is automatically forced into a full coupling position by the weight of the pump unit.
Inventors
- 👤 C Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:15
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/605; F04D29/606; F04D29/607; F16; F16L; F16L37/00; F16L37/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
247 words
In a pumping plant including in combination a sump for accumulating sewage or the like, vertical guide means fixedly mounted in said sump, a self coupling pumping apparatus comprising: an immersible casing with a pump and motor therein, said pump having an extended outlet nozzle; a base support means slidably connected to said vertical guide means for up and down movement; means pivotally connecting said casing to said base support means so that said casing and said outlet nozzle will tilt relative to said support means and said guide means, said connecting means being located for producing a relatively large thrusting force on said outlet nozzle when said casing is caused to pivot as a result of a relatively small downward force applied to said base support means; stop means for holding said casing in a tilted position; a discharge tube fixedly mounted in said sump and having an extended end portion with a free infeed opening, said pump nozzle being vertically aligned to engage said discharge end portion; the distance from the end of said outlet nozzle to said connecting means being greater than the distance from said outlet discharge end portion to said connecting means when the pump is in its lowermost coupling position, whereby when said immersible casing is lowered into said sump, said pump outlet nozzle engages said discharge end portion and slidably enters therein into a coupling position as said casing continues to lower and simultaneously pivots upwardly from its tilted position.
Claim 2
Dependent Claim
247 words
In a pumping plant including in combination a sump for accumulating sewage or the like, vertical guide means fixedly mounted in said sump, a self coupling pumping apparatus comprising: an immersible casing with a pump and motor therein, said pump having an extended outlet nozzle; a base support means slidably connected to said vertical guide means for up and down movement; means pivotally connecting said casing to said base support means so that said casing and said outlet nozzle will tilt relative to said support means and said guide means, said connecting means being located for producing a relatively large thrusting force on said outlet nozzle when said casing is caused to pivot as a result of a relatively small downward force applied to said base support means; stop means for holding said casing in a tilted position; a discharge tube fixedly mounted in said sump and having an extended end portion with a free infeed opening, said pump nozzle being vertically aligned to engage said discharge end portion; the distance from the end of said outlet nozzle to said connecting means being greater than the distance from said outlet discharge end portion to said connecting means when the pump is in its lowermost coupling position, whereby when said immersible casing is lowered into said sump, said pump outlet nozzle engages said discharge end portion and slidably enters therein into a coupling position as said casing continues to lower and simultaneously pivots upwardly from its tilted position.
Claim 3
Dependent Claim
21 words
The pumping apparatus as described in claim 1 including an annular sealing means mounted near the end of the pump nozzle.
Claim 4
Dependent Claim
29 words
The pumping apparatus as described in claim 1 wherein said extended end portion on the lower end of said discharge tube has a semi-cylindrical shape with the same curvature.
Claim 5
Dependent Claim
68 words
The pumping apparatus as described in claim 1 wherein said base support means comprises a member with projections along its opposite sides forming channels to receive said vertical guide means, a first pin means near the lower end of said member attached to said pivotally connecting means extending from said casing, and a second pin means for retaining said stop means near the upper end of said member.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |