Valves and valve actuation – Tube compressors – Roller tube contacting element
Patent
1981-08-10
1984-05-15
Schwadron, Martin P.
Valves and valve actuation
Tube compressors
Roller tube contacting element
251 7, F16K 706
Patent
active
RE0315842
ABSTRACT:
The rate of flow of a fluid through plastic tubing is varied by clamping a portion of a circumferential section of the tube wall with sufficient force to fully close that part of the passage between the clamped wall portions, permitting fluid flow only through the resulting, remaining open cross-sectional area. Cold flow of the plastic material of the clamped portion of the tubing wall, such as might otherwise effect a change in the remaining cross-sectional flow area, is prevented or minimized by rigidly confining the clamped section. To adjustably vary the flow rate, the operative, passage-defining wall section of the tubing is varied by uniformly varying the ratio of the section of clamped tubing, and the remaining, operative wall portion of the tubing, or by deforming the operative wall portion.
REFERENCES:
patent: 3012710 (1963-09-01), Dresden
patent: 3016915 (1962-01-01), Moeller, Jr.
patent: 3078501 (1963-02-01), Thorman
patent: 3099429 (1963-07-01), Broman
patent: 3189038 (1965-06-01), Von Pechmann
patent: 3289999 (1966-12-01), Konzak
patent: 3477454 (1969-11-01), Fields
patent: 3477686 (1969-11-01), Engelsher et al.
Novack Sheri
Schwadron Martin P.
Sokolski Edward A.
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