US3677667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peristaltic fluid pump
Assignee: Individual
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Filing: 1970-08-28
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Granted: 1972-07-18
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Expires: 1990-08-28
Abstract
Abstract A peristaltic pump embodying a tube formed of flexible material surrounded by a chamber that contains a ferromagnetic fluid. A plurality of electrically conducting loops are placed circumferentially around the flexible tube in the vicinity of the ferromagnetic fluid. The conducting loops are sequentially energized along the length of the flexible tube in such a manner that the resultant force on the ferromagnetic fluid causes the portion of the flexible tube in the vicinity of the energized loops to flex in a predetermined manner. This action provides a motive force that advances fluid through the tube in any selected manner.
Inventors
- 👤 Clyde A Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/09
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
95 words
A peristaltic pump, comprising: a. a continuous flexible tube defining a main fluid path; b. a chamber containing a ferromagnetic fluid that surrounds said flexible tube; and c. a plurality of electrically conducting wires positioned at selected intervals along the length of said flexible tube, each of said wires comprising a loop circumferentially located immediately adjacent to said flexible tube and within said chamber, the sequential energization of said loops causing the portion of said flexible tube adjacent to said energized loop to collapse to provide a motive force for said fluid within said tube.
Claim 2
Dependent Claim
95 words
A peristaltic pump, comprising: a. a continuous flexible tube defining a main fluid path; b. a chamber containing a ferromagnetic fluid that surrounds said flexible tube; and c. a plurality of electrically conducting wires positioned at selected intervals along the length of said flexible tube, each of said wires comprising a loop circumferentially located immediately adjacent to said flexible tube and within said chamber, the sequential energization of said loops causing the portion of said flexible tube adjacent to said energized loop to collapse to provide a motive force for said fluid within said tube.
Claim 3
Dependent Claim
56 words
The invention according to claim 1 wherein a portion of said loops are circumferentially located adjacent to said chamber at a distance from said flexible tube, the sequential energization of said portion of loops causing the portion of said flexible tube nearest thereto to expand to provide a motive force for said fluid within said tube.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |