US3972649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of peristaltic pumping and device for working by such method
Assignee: Individual
•
Filing: 1974-10-30
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Granted: 1976-08-03
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Expires: 1994-10-30
Abstract
Abstract In pumping devices based on the known principle of peristaltic movement the flexible tube conveying the fluid is regularly advanced while the pump is operating. In a peristaltic pump working by the aforesaid principle the tube is provided with a prolongation in excess serving as a store length while the tube is fed regularly during operation of the pump.
Inventors
- 👤 Werner Jutte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:34
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1253
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
121 words
In a method for using the principle of peristaltic movement for conveying a fluid in a peristaltic pump, said pump comprising a flexible tube and clamping elements squeezing said tube periodically against a base surface so as to define clamping points with said base surface, the clamping points travelling in the conveying direction of the fluid to be pumped, the improvement comprising the steps of: storing an excess portion of said tube upon a rotatable drum; and rotating said drum in a controlled manner and in a direction such that said tube is fed in the axial direction of said tube, and said tube is fed with respect to said base surface and said clamping points with a predetermined feeding rate.
Claim 2
Dependent Claim
121 words
In a method for using the principle of peristaltic movement for conveying a fluid in a peristaltic pump, said pump comprising a flexible tube and clamping elements squeezing said tube periodically against a base surface so as to define clamping points with said base surface, the clamping points travelling in the conveying direction of the fluid to be pumped, the improvement comprising the steps of: storing an excess portion of said tube upon a rotatable drum; and rotating said drum in a controlled manner and in a direction such that said tube is fed in the axial direction of said tube, and said tube is fed with respect to said base surface and said clamping points with a predetermined feeding rate.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said tube is fed in respect to said base surface in the conveying direction of the fluid to be pumped.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein said tube is fed continuously and the predetermined feeding rate is determined on the wear rate of the tube.
Claim 5
Dependent Claim
32 words
The method of claim 1 wherein said tube is fed continuously and the predetermined feeding rate is determined on the number of clamping contacts during a predetermined period or unit of time.
Claim 6
Dependent Claim
85 words
A peristaltic pump comprising: a flexible tube, claming elements for squeezing said tube periodically against a base surface so as to define clamping points with said base surface, the clamping points travelling in the conveying direction of the fluid to be pumped, said flexible tube having a storage portion movably supported upon storage means for movably supplying said storage portion of said tube to said clamping points, and means for controlling the movement of said storage means and said flexible tube at a predetermined rate.
Claim 7
Dependent Claim
85 words
A peristaltic pump comprising: a flexible tube, claming elements for squeezing said tube periodically against a base surface so as to define clamping points with said base surface, the clamping points travelling in the conveying direction of the fluid to be pumped, said flexible tube having a storage portion movably supported upon storage means for movably supplying said storage portion of said tube to said clamping points, and means for controlling the movement of said storage means and said flexible tube at a predetermined rate.
Claim 8
Dependent Claim
30 words
A peristaltic pump as in claim 5, said means for controlling the movement of the flexible tube including a rotatably mounted store drum receiving the storage portion of said tube.
Claim 9
Dependent Claim
17 words
A peristaltic pump as in claim 6, wherein said store drum is rotated at a continuous speed.
Claim 10
Dependent Claim
18 words
A peristaltic pump as in claim 6 wherein said drum is driven by a uniformly rotating driving motor.
Claim 11
Dependent Claim
15 words
A peristaltic pump as in claim 8 wherein said driving motor is a clock work.
Claim 12
Dependent Claim
20 words
A peristaltic pump as in claim 8 wherein between said driving motor and said drum a reduction gear is interposed.
Claim 13
Dependent Claim
23 words
A peristaltic pump as in claim 6, wherein said drum is arranged upstream of the pump and is provided with a retarding mechanism.
Claim 14
Dependent Claim
15 words
A peristaltic pump as in claim 11, wherein said retarding mechanism is a reduction gearing.
Claim 15
Dependent Claim
23 words
A peristaltic pump as in claim 6, wherein said drum is provided with a helical groove receiving said storage portion of 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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |