US3784323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peristaltic pump
Assignee: Gambro Industries SAS
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Filing: 1972-11-09
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Granted: 1974-01-08
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Expires: 1992-11-09
Abstract
Abstract A peristaltic pump in which the material and thickness of the wall of the tube are chosen so that, at a predetermined pressure differential, between the exterior and interior, collapse of the tube wall to a flattened condition occurs, thereby causing restriction in the flow rate of liquid in the tube as a function of the pump inlet pressure.
Inventors
- 👤 A Sausse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:06
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1215
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
A method of peristaltic pumping comprising providing a flexible compressible tube said tube being constructed from a silicone elastomer and a pumping portion thereof and reducing the inlet pressure to said tube until the pressure difference between the inside and outside of the pumping portion of the tube becomes so high that said pumping portion partially collapses along the entire length thereof, and successively compressing said partially collapsed pumping portion at spaced apart points of compression and moving the points of compression longitudinally of said portion thereby to reduce the available pumping volume whereby the output from the pump is controlled as a function of the inlet pressure.
Claim 2
Independent Claim
108 words
A method of peristaltic pumping comprising providing a flexible compressible tube said tube being constructed from a silicone elastomer and a pumping portion thereof and reducing the inlet pressure to said tube until the pressure difference between the inside and outside of the pumping portion of the tube becomes so high that said pumping portion partially collapses along the entire length thereof, and successively compressing said partially collapsed pumping portion at spaced apart points of compression and moving the points of compression longitudinally of said portion thereby to reduce the available pumping volume whereby the output from the pump is controlled as a function of the inlet pressure.
Claim 3
Independent Claim
114 words
A method of operating a peristaltic pump to pump liquid from a source, said pump being of the type comprising a flexible compressible tube, a pumping portion to said tube and means for successively compressing said pumping portion at spaced apart points of compression and moving the points of compression longitudinally of said portion, including the step of progressively increasing the height of the pump above the source of liquid to be pumped until said pumping portion at least partially collapses due to reduction of the pressure of fluid within the tube thereby to reduce the available pumping volume whereby the output from the pump is controlled as a function of the inlet pressure.
Claim 4
Independent Claim
114 words
A method of operating a peristaltic pump to pump liquid from a source, said pump being of the type comprising a flexible compressible tube, a pumping portion to said tube and means for successively compressing said pumping portion at spaced apart points of compression and moving the points of compression longitudinally of said portion, including the step of progressively increasing the height of the pump above the source of liquid to be pumped until said pumping portion at least partially collapses due to reduction of the pressure of fluid within the tube thereby to reduce the available pumping volume whereby the output from the pump is controlled as a function of the inlet pressure.
References Cited (Backward Citations)
US2572658A
Cited
US3180272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |