Patent US3908689A successfully refreshed from Google Patents.
US3908689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free flow siphon pump and assembly
Assignee: Individual
•
Filing: 1973-09-07
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Granted: 1975-09-30
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Expires: 1993-09-07
Abstract
Abstract A pump for use as a siphon includes an elongated cylindrical body having an inlet nipple at one end to which an inlet hose is attached, the inlet hose being substantially smaller in diameter than the cylinder body. The actuator for the pump includes a piston dimensioned to engage the cylinder walls, and having a central hollow nipple to which a length of discharge hose is attached, the discharge hose being substantially longer than the housing. The housing includes a guide bushing at the discharge end, having a central opening for guiding the discharge hose. Moving the piston toward the discharge end while closing the free end of the discharge hose, enlarges the expansible pump chamber creating partial vacuum to initiate flow of liquid through the pump.
Inventors
- 👤 Glen R Wingate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:25
CPC Classifications
F; F04; F04F; F04F10/00; F04B; F04B33/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2842; Y10T137/2877; Y10T137/2883; Y10T137/289
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
A PUMP FOR A SIPHON COMPRISING A PUMP HOUSING COMPRISING AN ELONGATED CYLINDERICAL SLEEVE, FABRICATED FROM PLASTIC TUBING PROVIDED WITH AN INTERIOR COATING OF A TERAFLUOROTHYLENE, AN INLET END CAP CEMENTED TO SAID SLEEVE IN SEALING RELATION, HAVING AN INLET HOSE NIPPLE WITH AN OPENING OF A DIAMETER SMALLER THAN THAT OF SAID SLEEVE, A DISCHARGED END BUSHING CEMENTED TO SAID SLEEVE, HAVING A CENTRAL GUIDE EPENING OF A DIAMETER SMALLER THAN TAT OF SAID SLEEVE, A PUMP ACTUATOR COMPRISING AN ELONGATED TUBLAR CONDUIT AND A PISTON FIXED TO ONE END THEREOF, SAID CONDUIT EING DIMENSIONED TO PASS THROUGH SAID END BUSHING OPENING AND BEING SUBSTANTIALLY LONGER THAN SAID HOUSING, SAID PISYTON BEING A UNITARY MEMBER MOLDED FROM A RESILIENT PLASTIC MATERIAL, HAVING A PERRIPHERAL CYCLINDERICAL SURFACE DIMENSIONED FOR A SLIDING FIT WITH SAID HOUSING SLEEVE INTERIOR WALL, AND HAVING A PERIPHERAL AXIAL FLANGE DIVERGING OUTWARDLY FROM SAID CYCLINDERICAL SURFACE, SAID PISTON
Claim 2
Dependent Claim
152 words
A PUMP FOR A SIPHON COMPRISING A PUMP HOUSING COMPRISING AN ELONGATED CYLINDERICAL SLEEVE, FABRICATED FROM PLASTIC TUBING PROVIDED WITH AN INTERIOR COATING OF A TERAFLUOROTHYLENE, AN INLET END CAP CEMENTED TO SAID SLEEVE IN SEALING RELATION, HAVING AN INLET HOSE NIPPLE WITH AN OPENING OF A DIAMETER SMALLER THAN THAT OF SAID SLEEVE, A DISCHARGED END BUSHING CEMENTED TO SAID SLEEVE, HAVING A CENTRAL GUIDE EPENING OF A DIAMETER SMALLER THAN TAT OF SAID SLEEVE, A PUMP ACTUATOR COMPRISING AN ELONGATED TUBLAR CONDUIT AND A PISTON FIXED TO ONE END THEREOF, SAID CONDUIT EING DIMENSIONED TO PASS THROUGH SAID END BUSHING OPENING AND BEING SUBSTANTIALLY LONGER THAN SAID HOUSING, SAID PISYTON BEING A UNITARY MEMBER MOLDED FROM A RESILIENT PLASTIC MATERIAL, HAVING A PERRIPHERAL CYCLINDERICAL SURFACE DIMENSIONED FOR A SLIDING FIT WITH SAID HOUSING SLEEVE INTERIOR WALL, AND HAVING A PERIPHERAL AXIAL FLANGE DIVERGING OUTWARDLY FROM SAID CYCLINDERICAL SURFACE, SAID PISTON
Claim 3
Dependent Claim
18 words
A pump as set forth in claim 1 said piston comprising a membEr molded from high density polyethylene.
Claim 4
Dependent Claim
30 words
A pump as set forth in claim 2 said polyethylene piston and said tetrafluroethylene coated sleeve coacting to minimize friction wear and to provide a tight long lasting piston-to-wall seal.
Claim 5
Dependent Claim
71 words
A pump as set forth in claim 1 said actuator conduit being dimensioned sufficiently long to be gripped by the hand of the user when said piston is disposed adjacent to said inlet end cap; and the distal end of said actuator conduit adapted to be closed by the thumb of the user for preventing ingress of air to the pump chamber during withdrawal of said actuator conduit from said housing.
Claim 6
Dependent Claim
33 words
A pump as set forth in claim 1 said inlet end cap and said bushing comprising respective unitary molded parts fabricated from a plastic material, and both being permanently cemented to said sleeve.
Claim 7
Dependent Claim
27 words
A pump as set forth in claim 5 said sleeve being fabricated from polyvinylchloride; and said end cap and said bushing being fabricated from acrylonitrile butadiene styrene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |