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US4013263A
Expired / Lapsed
US
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Clamp for regulating fluid flow through plastic tubing
Assignee: Individual
•
Filing: 1975-12-24
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Granted: 1977-03-22
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Expires: 1995-12-24
Abstract
Abstract Tubing through which fluid flow is to be regulated is placed in a regulating clamp wherein it is clamped between a roller wheel and a surface having a variable cross-sectional area channel extending therealong. This surface is parallel to the travel path of the wheel, and thus there is a constant separation distance between these two elements for all wheel positions. Flow rate through the tubing is changed by longitudinal adjustment of the position of the roller wheel, the ratio of the portion of the tubing which is clamped between the wheel and the surface to that which is not clamped and over the channel, thereby being varied. A plurality of ridge elements are formed in the surface and act to locally pinch or grip the tubing at discrete intervals, thereby substantially lessening creep of the plastic tubing which, in turn, minimizes the flow rate change once the clamp has been set for the desired rate of flow.
Inventors
- 👤 Marvin Adelberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:59
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/22; A61M39/28; A61M39/286
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
133 words
In a clamp for regulating fluid flow through plastic tubing having a body portion with a longitudinal clamping surface, a variable cross-section longitudinal channel being formed in or along said surface and a roller wheel mounted in said body for longitudinal motion parallel to said clamping surface, the tubing being clamped between the roller wheel and said surface, the improvement comprising: a plurality of distributed raised portions separated from each other by discrete valley portions formed in said clamping surface for locally gripping the tubing wall at given locations, the height of said raised portions above the lowest point of said valley portions and the separation between said raised portions having magnitudes of the order of the compressed wall thickness of the tubing, thereby constraining the tubing so as to reduce creep thereof.
Claim 2
Dependent Claim
133 words
In a clamp for regulating fluid flow through plastic tubing having a body portion with a longitudinal clamping surface, a variable cross-section longitudinal channel being formed in or along said surface and a roller wheel mounted in said body for longitudinal motion parallel to said clamping surface, the tubing being clamped between the roller wheel and said surface, the improvement comprising: a plurality of distributed raised portions separated from each other by discrete valley portions formed in said clamping surface for locally gripping the tubing wall at given locations, the height of said raised portions above the lowest point of said valley portions and the separation between said raised portions having magnitudes of the order of the compressed wall thickness of the tubing, thereby constraining the tubing so as to reduce creep thereof.
Claim 3
Dependent Claim
15 words
The clamp of claim 1 wherein said raised portions are in the form of ridges.
Claim 4
Dependent Claim
14 words
The clamp of claim 2 wherein said ridges run substantially parallel to each other.
Claim 5
Dependent Claim
19 words
The clamp of claim 3 wherein said ridges run substantially parallel to the longitudinal axis of said clamping surface.
Claim 6
Dependent Claim
34 words
The clamp of claim 3 wherein the height (a) of said ridges and the separation (b) between ridges are substantially equal to each other and to the compressed wall thickness (c) of the tubing.
Claim 7
Dependent Claim
14 words
The clamp of claim 5 wherein the top portions of said ridges are rounded.
Claim 8
Dependent Claim
18 words
The clamp of claim 1 wherein said raised portions are in the form of spaced apart ridge members.
Claim 9
Dependent Claim
18 words
The clamp of claim 1 wherein said raised portions are in the form of spaced apart rounded projections.
References Cited (Backward Citations)
US3477686A
Cited
US3685787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |