Patent US3689204A successfully refreshed from Google Patents.
US3689204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated liquid pump and method of making same
Assignee: Motors Liquidation Co
•
Filing: 1970-05-18
•
Granted: 1972-09-05
•
Expires: 1990-05-18
Abstract
Abstract A liquid pump is formed by superposing several sheets of thin flexible material which may be fused together, for example, polyvinyl chloride. The flexible sheets form a displacement chamber, an air pressure operated pumping chamber inlet and outlet passages and check valve flaps in the passages. The valve flaps are formed from the flexible sheets by slitting in appropriate places or are provided by separate flexible sheets. The several sheets are laminated by applying heat and pressure in a predetermined pattern to provide the essential pump elements. The pumping air chamber may be omitted.
Inventors
- 👤 Bert C Prisk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:02
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/10; A; A61; A61M; A61M60/00; A61M60/10; A61M60/104; A61M60/117; A61M60/122; A61M60/40; A61M60/424; A61M60/427; A61M60/435; A61M60/457; A61M60/462; A61M60/80; A61M60/835; A61M60/837; A61M60/845; A61M60/851; A61M60/855; A61M60/89; A61M60/894; F04B43/0009; F04B43/0054; F04B43/02; F04B43/025; F04B43/06; F04B53/00; F04B53/10; F04B53/109; F04B53/1092; A61M60/126; A61M60/148; A61M60/20; A61M60/247; A61M60/253; A61M60/268; A61M60/892; A61M60/896
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A liquid pump operable by pulsed air pressure having a displacement chamber with walls formed of two flat sheets of flexible material joined at their sides, inlet and outlet passages communicating with the displacement chamber and having walls formed of the same sheets, an inflatable pumping chamber within the displacement chamber and formed of two flat sheets of flexible material joined at their periphery, inlet means for supplying air to the pumping chamber for varying the volume of the displacement chamber, and inlet and outlet valves in the inlet and outlet passages respectively, the valves comprising pairs of flexible flaps each secured to one of the sheets and cooperating to provide unidirectional fluid flow.
Claim 2
Dependent Claim
114 words
A liquid pump operable by pulsed air pressure having a displacement chamber with walls formed of two flat sheets of flexible material joined at their sides, inlet and outlet passages communicating with the displacement chamber and having walls formed of the same sheets, an inflatable pumping chamber within the displacement chamber and formed of two flat sheets of flexible material joined at their periphery, inlet means for supplying air to the pumping chamber for varying the volume of the displacement chamber, and inlet and outlet valves in the inlet and outlet passages respectively, the valves comprising pairs of flexible flaps each secured to one of the sheets and cooperating to provide unidirectional fluid flow.
Claim 3
Dependent Claim
118 words
A liquid pump operably by pulsed air pressure having a displacement chamber with walls formed of flat sheets of flexible material joined at their sides, inlet and outlet passages communicating with the displacement chamber and having walls formed of the same sheets, at least a portion of each displacement chamber wall being double layered to define an air chamber between the two wall layers, an inlet means for supplying pulsed air pressure to the air chambers for varying the volume of the displacement chamber, and inlet and outlet valves in the inlet and outlet passages respectively, each valve comprising a pair of flexible flaps each secured to one of the sheets and cooperating to provide unidirectional fluid flow.
Claim 4
Dependent Claim
118 words
A liquid pump operably by pulsed air pressure having a displacement chamber with walls formed of flat sheets of flexible material joined at their sides, inlet and outlet passages communicating with the displacement chamber and having walls formed of the same sheets, at least a portion of each displacement chamber wall being double layered to define an air chamber between the two wall layers, an inlet means for supplying pulsed air pressure to the air chambers for varying the volume of the displacement chamber, and inlet and outlet valves in the inlet and outlet passages respectively, each valve comprising a pair of flexible flaps each secured to one of the sheets and cooperating to provide unidirectional fluid flow.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |