US3741687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet-actuated membrane pump
Assignee: Individual
•
Filing: 1971-04-05
•
Granted: 1973-06-26
•
Expires: 1991-04-05
Abstract
Abstract The invention relates to a pump having a reservoir having an inlet thereto and an outlet therefrom, and a membrane defining at least part of one wall of the reservoir and movable alternately to draw fluid into the reservoir through the inlet and to expel fluid from the reservoir through the outlet, a membrane serving to open and close the inlet and a membrane serving to open and close the outlet. One or more membranes may be used and the or each membrane is preferably movable in response to changes in fluid pressure on the opposite side thereof to the reservoir.
Inventors
- 👤 E Nystroem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:04
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0227; F04; F04B; F04B7/00; F04B7/02; F04B7/0266; F04B7/0275; F04B43/00; F04B43/02; F04B43/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
194 words
A pump comprising a reservoir, an inlet to said reservoir and an outlet from said reservoir, a pumping membrane defining at least part of one wall of the reservoir and movable alternately to draw fluid into the reservoir through the inlet and to expel fluid from the reservoir through the outlet, means including a first jet pump for moving the pumping membrane by alternately subjecting the face thereof which lies opposite the reservoir to fluid pressure and vacuum, a first valving membane movable to open and close the inlet, a second valving membrane movable to open and close the outlet, said first jet pump being operable on the first valving membrane to move it between its opening and closing positions by alternately subjecting one face thereof to fluid pressure and vacuum, and means including a second jet pump for alternately subjecting one face of the second valving membrane to fluid pressure and vacuum to move the second valving membrane to its opening position when the first valving membrane is in its closing position and to move the second valving membrane to its closing position when the first valving membrane is in its opening position.
Claim 2
Dependent Claim
194 words
A pump comprising a reservoir, an inlet to said reservoir and an outlet from said reservoir, a pumping membrane defining at least part of one wall of the reservoir and movable alternately to draw fluid into the reservoir through the inlet and to expel fluid from the reservoir through the outlet, means including a first jet pump for moving the pumping membrane by alternately subjecting the face thereof which lies opposite the reservoir to fluid pressure and vacuum, a first valving membane movable to open and close the inlet, a second valving membrane movable to open and close the outlet, said first jet pump being operable on the first valving membrane to move it between its opening and closing positions by alternately subjecting one face thereof to fluid pressure and vacuum, and means including a second jet pump for alternately subjecting one face of the second valving membrane to fluid pressure and vacuum to move the second valving membrane to its opening position when the first valving membrane is in its closing position and to move the second valving membrane to its closing position when the first valving membrane is in its opening position.
Claim 3
Dependent Claim
35 words
A pump according to claim 1, wherein a single membrane defines at least part of one wall of the reservoir, serves to open and close the inlet and serves to open and close the outlet.
Claim 4
Dependent Claim
26 words
A pump according to claim 1, wherein each membrane is movable in response to changes in fluid pressure on the opposite side thereof to the reservoir.
Claim 5
Dependent Claim
61 words
The pump of claim 1 having valve means for intermittently obstructing the flow of fluid leaving each of the jet pumps, whereby the jet pump creates a vacuum on the face of its respective membrane when the valve means is open and the jet pump exerts a pressure on the face of its respective membrane when the valve means is closed.
Claim 6
Dependent Claim
71 words
A pump according to claim 1, wherein the reservoir is formed as a hollowed out portion in a solid member, at least two further hollowed out portions also being formed in the solid member, said further hollowed out portion being connected to the reservoir and to exterior walls of the solid member by passageways, a membrane extending across the reservoir and each of the at least two further hollowed out portions.
Claim 7
Dependent Claim
58 words
A pump according to cliam 5 wherein the hollowed out portions, corresponding to the reservoir and the at least two further hollowed out portions, are formed in at least one further solid member located on the opposite side of a membrane to the reservoir and the at least two further hollowed out portions in the first solid member.
Claim 8
Dependent Claim
58 words
A pump according to cliam 5 wherein the hollowed out portions, corresponding to the reservoir and the at least two further hollowed out portions, are formed in at least one further solid member located on the opposite side of a membrane to the reservoir and the at least two further hollowed out portions in the first solid member.
Claim 9
Dependent Claim
56 words
A pump according to claim 5, wherein the reservoir is formed in an opposite face of the solid member to said at least two further hollowed out portions, and a first membrane defines at least part of one wall of the reservoir and a second membrane serves to open and close the inlet and the outlet.
Claim 10
Dependent Claim
56 words
A pump according to claim 6, wherein the reservoir is formed in an opposite face of the solid member to said at least two further hollowed out portions, and a first membrane defines at least part of one wall of the reservoir and a second membrane serves to open and close the inlet and the outlet.
Claim 11
Dependent Claim
61 words
The pump of claim 1 having valve means for intermittently obstructing the flow of fluid leaving each of the jet pumps, whereby the jet pump creates a vacuum on the face of its respective membrane when the valve means is open and the jet pump exerts a pressure on the face of its respective membrane when the valve means is closed.
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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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |