Patent US3630481A successfully refreshed from Google Patents.
US3630481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drip-rate control apparatus for intravenous administration
Assignee: Individual
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Filing: 1970-07-21
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Granted: 1971-12-28
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Expires: 1990-07-21
Abstract
Abstract A wedge-type pinch roller is formed of a resilient material and includes a peripheral opening capable of controlling the flow of flexible tubing used in intravenous administration sets. Movement of the roller element, in one position, relative to the flexible tubing pinches the tubing to effectuate in the remaining portion an orifice of size as a function of desired drip-rate flow therethrough. Movement in another position either changes said drip rate or closes the peripheral opening because of the resilient nature of the pinch roller and hence shuts off flow in the tubing.
Inventors
- 👤 John B Mcgay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:52
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/22; A61M39/28; A61M39/285
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
An apparatus to control the drip rate through intravenous administration tubing of the type having a housing through which said tubing is positioned, said housing including an inclined surface and a pinch roller adapted to move in a plane that would intersect said surface, the improvement in said roller comprising: said roller composed of a resilient material and including a groove about its periphery such that when said roller is oriented opposite said surface with said tubing therebetween will, in one position, be such that the outer periphery of said roller adjacent said groove pinches at least a portion of one side of said tubing allowing the remainder of said tubing to enter said groove for control of said drip rate and in a second position, such that said groove is collapsed relative to said tubing to shut off flow through said tubing.
Claim 2
Independent Claim
143 words
An apparatus to control the drip rate through intravenous administration tubing of the type having a housing through which said tubing is positioned, said housing including an inclined surface and a pinch roller adapted to move in a plane that would intersect said surface, the improvement in said roller comprising: said roller composed of a resilient material and including a groove about its periphery such that when said roller is oriented opposite said surface with said tubing therebetween will, in one position, be such that the outer periphery of said roller adjacent said groove pinches at least a portion of one side of said tubing allowing the remainder of said tubing to enter said groove for control of said drip rate and in a second position, such that said groove is collapsed relative to said tubing to shut off flow through said tubing.
Claim 3
Dependent Claim
24 words
Apparatus of claim 1 the improvement comprising said roller outer periphery pinching said tubing on both sides of said groove in said one position.
Claim 4
Dependent Claim
19 words
Apparatus of claim 1 wherein said roller comprises a rigid cylindrical core about which said resilient material is attached.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |