US4288205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable volume peristaltic pump
Assignee: Pako Corp
•
Filing: 1980-01-18
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Granted: 1981-09-08
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Expires: 2000-01-18
Abstract
Abstract A peristaltic pump driven by a single speed power source has a fixed length of flexible wall tubing circumferentially positioned between the wall of the inner chamber and an adjustable band. The flexible band has one end fixed to the pump housing and the other to an adjusting screw. Turning the adjusting screw varies the effective length of the adjustable band and consequently the degree of contact with the flexible wall tubing. Increasing the effective length of the adjustable band flattens the tubing against the wall, thereby changing the volumetric capacity of the tubing and delivery rate of the pump. Decreasing the effective length of the adjustable band has the opposite effect.
Inventors
- 👤 Keith L. Henk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:08
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1253
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
111 words
A peristaltic pump comprising: housing means with an arcuate chamber defined by an arcuate wall; rotor means coaxially positioned within the arcuate chamber; a plurality of roller means spaced circumferentially within the arcuate chamber and rotatably attached to the rotor means; flexible conduit means circumferentially arranged within the arcuate chamber; adjustable band means circumferentially arranged in the arcuate chamber between the flexible conduit means and the roller means for longitudinally engaging the flexible conduit means; and, adjusting means for adjusting the effective length of the flexible band means to adjust the extent of flattening of the flexible conduit means against the arcuate chamber wall and thereby adjusting the volumetric capacity thereof.
Claim 2
Dependent Claim
111 words
A peristaltic pump comprising: housing means with an arcuate chamber defined by an arcuate wall; rotor means coaxially positioned within the arcuate chamber; a plurality of roller means spaced circumferentially within the arcuate chamber and rotatably attached to the rotor means; flexible conduit means circumferentially arranged within the arcuate chamber; adjustable band means circumferentially arranged in the arcuate chamber between the flexible conduit means and the roller means for longitudinally engaging the flexible conduit means; and, adjusting means for adjusting the effective length of the flexible band means to adjust the extent of flattening of the flexible conduit means against the arcuate chamber wall and thereby adjusting the volumetric capacity thereof.
Claim 3
Dependent Claim
19 words
The peristaltic pump of claim 1 wherein the roller means comprises two rollers rotatably attached to the rotor means.
Claim 4
Dependent Claim
12 words
The peristaltic pump of claim 1 including a single speed power source.
Claim 5
Dependent Claim
17 words
The peristaltic pump of claim 1 wherein the flexible band means is a fatigue-resistant synthetic polymer band.
Claim 6
Dependent Claim
13 words
The peristaltic pump of claim 4 wherein the synthetic polymer band is polypropylene.
Claim 7
Dependent Claim
30 words
The peristaltic pump of claim 4 wherein the flexible band further includes a fatigue-resistant metal band fixedly attached to the synthetic polymer band on the side engaging the flexible conduit.
Claim 8
Dependent Claim
31 words
The peristaltic pump of claim 6 wherein the fatigue-resistant metal band is a metal of the group consisting of beryllium nickel alloys, beryllium copper alloys, and series 400 stainless steel alloys.
Claim 9
Dependent Claim
23 words
The peristaltic pump of claim 1 wherein the adjustable band means completes a full spiral within the arcuate chamber of the housing means.
Claim 10
Dependent Claim
29 words
The peristaltic pump of claim 1 further comprising: pivot arm means for holding the adjustable band means in an arcuate shape within the arcuate chamber of the housing means.
Claim 11
Dependent Claim
36 words
The peristaltic pump of claim 9 wherein the pivot arm means is pivotally connected to the housing at a first pivot point and is pivotally connected to the adjustable band means at a second pivot point.
Claim 12
Dependent Claim
34 words
The peristaltic pump of claim 1 wherein the adjustable band includes retaining members longitudinally positioned on opposing sides of the flexible conduit retaining the flexible conduit in an engaging position with the adjustable band.
Claim 13
Dependent Claim
31 words
The peristaltic pump of claim 1 wherein the adjustable band means is connected to the housing proximate a first end and is connected to the adjusting means proximate a second end.
Claim 14
Dependent Claim
33 words
The peristaltic pump of claim 12 wherein the adjusting means is connected to the housing and includes means for clamping the adjustable band means proximate the second end of the adjustable band means.
Claim 15
Dependent Claim
17 words
The peristaltic pump of claim 13 wherein the flexible conduit means has an inlet and an outlet.
Claim 16
Dependent Claim
58 words
The peristaltic pump of claim 14 and further comprising pivot arm means pivotally connected to the housing at a first pivot point and pivotally connected to the adjustable band means at a second pivot point, and wherein the adjusting means adjusts the effective length of the adjustable band means between the adjusting means and the second pivot point.
Claim 17
Dependent Claim
46 words
The peristaltic pump of claim 15 wherein adjusting the effective length of the adjustable band means between the adjusting means and the second pivot point adjusts the extent of flattening of the flexible conduit means in a portion between the inlet and the second pivot point.
References Cited (Backward Citations)
US3583838A
Cited
US3591319A
Cited
US3609069A
Cited
US3737251A
Cited
US3723030A
Cited
US3990444A
Cited
DE2812805A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |