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US4013263A Expired / Lapsed US ⏱️ 0.0 years remaining

Clamp for regulating fluid flow through plastic tubing

Assignee: Individual
•
Filing: 1975-12-24
•
Granted: 1977-03-22
•
Expires: 1995-12-24
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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 11:42
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

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