Patent US4521162A successfully refreshed from Google Patents.
US4521162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping system
Assignee: Sellafield Ltd
•
Filing: 1984-05-07
•
Granted: 1985-06-04
•
Expires: 2004-05-07
Abstract
Abstract A fluidic pumping system comprises a reverse flow diverter positioned below the level of a liquid to be pumped and inserted between a charge vessel and a delivery pipe. Control means including signal generating means, conveniently an ultrasonic transducer, effect alternate pressurizing and venting of the charge vessel for pumping the liquid. A pipe for the supply of compressed air to the charge vessel serves as a waveguide for the signals from the signal generating means.
Inventors
- 👤 Francis J. Parkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:26
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
A fluidic pumping system comprising a vessel for a liquid to be pumped, a reverse flow diverter positioned at a level below the level of the liquid to be pumped, a charge vessel and a delivery pipe with the reverse flow diverter inserted therebetween, compressed gas supply means for the charge vessel and control means for effecting alternate pressurising and venting of the charge vessel to effect pumping of the liquid, the control means including a conduit communicating with the charge vessel and means for generating signals along the conduit for detecting the liquid level at at least one position in the operating cycle.
Claim 2
Dependent Claim
104 words
A fluidic pumping system comprising a vessel for a liquid to be pumped, a reverse flow diverter positioned at a level below the level of the liquid to be pumped, a charge vessel and a delivery pipe with the reverse flow diverter inserted therebetween, compressed gas supply means for the charge vessel and control means for effecting alternate pressurising and venting of the charge vessel to effect pumping of the liquid, the control means including a conduit communicating with the charge vessel and means for generating signals along the conduit for detecting the liquid level at at least one position in the operating cycle.
Claim 3
Dependent Claim
17 words
A pumping system according to claim 1 in which the signal generating means comprises an ultrasonic transducer.
Claim 4
Dependent Claim
28 words
A pumping system according to claim 2 including valve means operable in response to the signals generated by the transducer for alternately pressurising and venting the charge vessel.
Claim 5
Dependent Claim
22 words
A pumping system according to claim 3 in which the transducer is mounted on a pipe communicating directly with the valve means.
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) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |