Patent US5919195A successfully refreshed from Google Patents.
US3645649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stirling cycle-type thermal device servo pump
Assignee: Research Corp
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Filing: 1970-03-04
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Granted: 1972-02-29
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Expires: 1990-03-04
Abstract
Abstract A servo pump assisting a pulsating primary pump. A Stirling cycle engine drives an expansible chamber pump in series with the primary pump. Pulses are transmitted from the primary pump to drive the displacer piston of the engine to drive the pump in phase with the primary pump.
Inventors
- 👤 William T Beale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:13
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/40; A61M60/424; A61M60/427; A61M60/10; A61M60/122; A61M60/165; A61M60/438; A61M60/441; A61M60/80; A61M60/855; A61M60/89; A61M60/894; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A servo pump for assisting a pulsating primary pump comprising: a Stirling cycle engine having displacer and power piston means; an expansible chamber pump driven by said power piston, means connecting said expansible chamber pump in series with said primary pump; and means for transmitting pulses from said primary pump to initiate drive of said displacer piston to thereby actuate said engine to drive said expansible chamber pump in phase with said primary pump.
Claim 2
Dependent Claim
74 words
A servo pump for assisting a pulsating primary pump comprising: a Stirling cycle engine having displacer and power piston means; an expansible chamber pump driven by said power piston, means connecting said expansible chamber pump in series with said primary pump; and means for transmitting pulses from said primary pump to initiate drive of said displacer piston to thereby actuate said engine to drive said expansible chamber pump in phase with said primary pump.
Claim 3
Dependent Claim
110 words
A servo pump for assisting a pulsating primary pump comprising: a Stirling cycle engine having displacer and power piston means; an expansible chamber pump driven by said power piston, means connecting said expansible chamber pump in series with said primary pump; and means for transmitting pulses from said primary pump to initiate drive of said displacer piston to thereby actuate said engine to drive said expansible chamber pump in phase with said primary pump, wherein said means for transmitting pulses comprises a fluid column interconnecting said primary pump and said engine, and means for translating fluid pressure pulses transmitted through said column to mechanical movement to actuate said displacer piston.
Claim 4
Dependent Claim
110 words
A servo pump for assisting a pulsating primary pump comprising: a Stirling cycle engine having displacer and power piston means; an expansible chamber pump driven by said power piston, means connecting said expansible chamber pump in series with said primary pump; and means for transmitting pulses from said primary pump to initiate drive of said displacer piston to thereby actuate said engine to drive said expansible chamber pump in phase with said primary pump, wherein said means for transmitting pulses comprises a fluid column interconnecting said primary pump and said engine, and means for translating fluid pressure pulses transmitted through said column to mechanical movement to actuate said displacer piston.
Claim 5
Dependent Claim
33 words
A pump in accordance with claim 2 wherein said means for translating includes a diaphragm bisecting a chamber with one side thereof communicating with said fluid column and the other with ambient pressure.
Claim 6
Dependent Claim
24 words
A pump in accordance with claim 3 wherein said means for translating further includes a drive rod interconnecting said diaphragm and said displacer piston.
Claim 7
Dependent Claim
45 words
A pump in accordance with claim 3 wherein said means for transmitting pulses further comprises a return fluid column and valve means provide flow from said primary pump, through said one side of said chamber and back to said primary pump through said return column.
Claim 8
Dependent Claim
43 words
A pump in accordance with claim 1 wherein said expansible chamber pump comprises a pump housing, a pump piston reciprocable in said pump housing, means connecting said pump piston to said drive piston and inlet and outlet means communicative with said pump housing.
Claim 9
Dependent Claim
59 words
A pump in accordance with claim 6 wherein said pump piston divides said pump housing into inlet and outlet chambers, said inlet and outlet means comprising check valve controlled conduits communicating with said inlet and outlet chambers, respectively, and check valve means disposed through said pump piston to provide transfer of fluid from said inlet to said outlet chambers.
References Cited (Backward Citations)
US2746241A
Cited
US3478695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |