US3609069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peristaltic pump for conveying liquids in chemical apparatus
Assignee: Polymetron AG
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Filing: 1969-11-17
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Granted: 1971-09-28
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Expires: 1989-11-17
Abstract
Abstract A peristaltic pump for conveying liquids in chemical apparatus having a plurality of plungers. A flexible layer of a material such as polytetrafluorethylene is arranged under tension between the plungers and the hoses containing the liquid to be pumped. The flexible layer of material adapts itself to the level of the surfaces of the individual plungers and, thereby increases the service life of the hoses.
Inventors
- 👤 Alfred Martinelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:19
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B43/0072; F04B43/08; F04B43/082
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
A peristaltic pump for conveying liquid including a pump housing, at least one hose for conveying the liquid to be pumped and a plurality of plungers operatively associated with said pump housing and adapted to be selectively moved into squeezing engagement with said at least one hose so as to pump the liquid in a desired unilateral direction, characterized in that a flexible layer of material is arranged between the surfaces of said plungers and said at least one hose, wherein one end of said flexible layer is fixedly connected a tone side of the pump housing and the other end of said flexible layer is resiliently connected at the pump housing, whereby the wall of said at least one hose steadily follows any changes in the level of the surfaces of said plungers.
Claim 2
Dependent Claim
134 words
A peristaltic pump for conveying liquid including a pump housing, at least one hose for conveying the liquid to be pumped and a plurality of plungers operatively associated with said pump housing and adapted to be selectively moved into squeezing engagement with said at least one hose so as to pump the liquid in a desired unilateral direction, characterized in that a flexible layer of material is arranged between the surfaces of said plungers and said at least one hose, wherein one end of said flexible layer is fixedly connected a tone side of the pump housing and the other end of said flexible layer is resiliently connected at the pump housing, whereby the wall of said at least one hose steadily follows any changes in the level of the surfaces of said plungers.
Claim 3
Dependent Claim
18 words
A peristaltic pump according to claim 1, wherein said flexible layer consists of polytetrafluorethylene reinforced with glass fiber.
Claim 4
Dependent Claim
20 words
A peristaltic pump according to claim 1, wherein said flexible layer has a thickness between about 0.2 and 1.5 mm.
Claim 5
Dependent Claim
28 words
A peristaltic pump according to claim 1, wherein said flexible layer consists of polytetrafluorethylene reinforced with glass fiber and has a thickness between about 0.2 to 1.5 mm.
Claim 6
Dependent Claim
19 words
A peristaltic pump according to claim 1, wherein said flexible layer is attached at the pump housing under tension.
Claim 7
Dependent Claim
28 words
A peristaltic pump according to claim 5, wherein said flexible layer consists of polytetrafluorethylene reinforced with glass fiber and has a thickness between about 0.2 to 1.5 mm.
References Cited (Backward Citations)
US3083647A
Cited
US3105447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |