US3945767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper apparatus
Assignee: DeSoto Inc
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Filing: 1974-08-08
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Granted: 1976-03-23
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Expires: 1994-08-08
Abstract
Abstract The pulsations produced by a pulsating positive displacement pump are damped by interposing in the inlet line to the pump a conduit carrying at least one upstanding open ended tube having its lower end communicating with the conduit.
Inventors
- 👤 Abdullah M. Rokadia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:30
CPC Classifications
F; F04; F04B; F04B11/00; F04B11/0008; F04B11/0016; F04B11/0025; F04B53/00; F04B53/10; F04B53/1037
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
95 words
In combination with a liquid supply and a pulsating positive displacement pump, a conduit connected to said liquid supply at its inlet end and to the pump at its outlet end, said conduit carrying a plurality of upstanding open-ended tubes ccmmunicating with said conduit at their lower ends and extending upwardly to contain the liquid flowing in said conduit when said pump is not drawing liquid through said conduit, said tubes having float-operated check valves at the upper ends thereof to prevent spillover, and a flow meter interposed in the liquid supply to said conduit.
Claim 2
Dependent Claim
95 words
In combination with a liquid supply and a pulsating positive displacement pump, a conduit connected to said liquid supply at its inlet end and to the pump at its outlet end, said conduit carrying a plurality of upstanding open-ended tubes ccmmunicating with said conduit at their lower ends and extending upwardly to contain the liquid flowing in said conduit when said pump is not drawing liquid through said conduit, said tubes having float-operated check valves at the upper ends thereof to prevent spillover, and a flow meter interposed in the liquid supply to said conduit.
Claim 3
Dependent Claim
21 words
Apparatus as recited in claim 1 in which a flow restriction valve is mounted on the inlet end of said conduit.
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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |