Patent US5230614A successfully refreshed from Google Patents.
US5230614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduced pulsation tapered ramp pump head
Assignee: Johnson and Johnson Surgical Vision Inc
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Filing: 1992-06-03
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Granted: 1993-07-27
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Expires: 2012-06-03
Abstract
Abstract A peristaltic pump includes a plurality of rollers for compressing and sealing a collapsible and resilient tube. A housing and a pump arm with a specific arcuate surface and position with respect to the housing enable the succesive contact and gradual compression of the rollers with the tube in a manner for moving a fluid through the tube in one direction without creating substantial fluid back pressure in an opposite direction.
Inventors
- 👤 Frank Zanger
- 👤 Tim Surber
- 👤 Susanne Roslon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:31
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1253; F04B43/1284
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
172 words
A peristaltic pump comprising: assembly head means for supporting a plurality of rollers, said rollers being mounted in an arcuate pattern about an assembly head axis, each roller having a rotation axis generally parallel to the assembly head axis; a collapsible and resilient tube; housing means for rotatably mounting said assembly head and for guiding the collapsible and resilient tube over said rollers; a pump arm having an arcuate surface and mounted to said housing means in a position enabling said rollers to compress the tube against the arcuate surface as the assembly head is rotated, said arcuate surface being shaped and positioned with respect to said assembly head so that as the assembly head is rotated, each roller successively contacts the tube and gradually seals the tube during approximately a 45° rotation of the assembly head, said pump arm being pivotally mounted to said housing means; and means for rigidly positioning and locking the pump arm in a closed position enabling said rollers to compress the tube against the arcuate surface.
Claim 2
Dependent Claim
172 words
A peristaltic pump comprising: assembly head means for supporting a plurality of rollers, said rollers being mounted in an arcuate pattern about an assembly head axis, each roller having a rotation axis generally parallel to the assembly head axis; a collapsible and resilient tube; housing means for rotatably mounting said assembly head and for guiding the collapsible and resilient tube over said rollers; a pump arm having an arcuate surface and mounted to said housing means in a position enabling said rollers to compress the tube against the arcuate surface as the assembly head is rotated, said arcuate surface being shaped and positioned with respect to said assembly head so that as the assembly head is rotated, each roller successively contacts the tube and gradually seals the tube during approximately a 45° rotation of the assembly head, said pump arm being pivotally mounted to said housing means; and means for rigidly positioning and locking the pump arm in a closed position enabling said rollers to compress the tube against the arcuate surface.
Claim 3
Dependent Claim
17 words
The peristaltic pump according to claim 1 wherein said plurality of tube compressor means comprises four rollers.
Claim 4
Dependent Claim
28 words
The peristaltic pump according to claim 2 wherein each roller comprises means, defining a circumferential surface thereon, for uniformly sealing the tube as each roller compresses the tubing.
Claim 5
Dependent Claim
25 words
The peristaltic pump according to claim 3 wherein said collapsible and resilient tube comprises means for preventing movement of the tube through the housing means.
Claim 6
Dependent Claim
40 words
The peristaltic pump according to claim 4 wherein said means for preventinq movement of the tube comprises at least one collar disposed on said tube and having a dimension sufficient to prevent entry of the collar into the housing means.
Claim 7
Dependent Claim
26 words
The peristaltic pump according to claim 5 wherein each roller has an inside diameter that is smaller than roller diameters at each end of each roller.
Claim 8
Dependent Claim
30 words
The peristaltic pump according to claim 6 wherein each roller has a constant diameter extending between end diameters of each roller, said end diameters being greater than said constant diameter.
Claim 9
Dependent Claim
21 words
The peristaltic pump according to claim 7 wherein said end diameters are interconnected with said constant diameter by an arcuate surface.
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) | 1996-07-26 | 1997-01-25 | 1997-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-26 | 2001-01-25 | 2001-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-26 | 2005-01-25 | 2005-07-27 | $7700.00 | Window Closed / Lapsed |