The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 1991
Filed:
Mar. 02, 1989
Marvin Adelberg, Encino, CA (US);
Other;
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 which is substantially parallel to the travel of the wheel. The surface has a variable cross-sectional area channel extending within or therealong. Flow rate through the tubing is changed by longitudinal adjustment of the position of the roller wheel, the ratio between the portion of the tubing which is clamped shut to that which is exposed to the channel, and consequently not being clamped, thereby being varied. A plurality of raised elements are formed in the surface and act to locally pinch or grip the tubing at discrete intervals thereby both improving the grip and lessening the creep of the tubing. The raised element which is most remote from the channel is substantially higher than the raised element closer to the channel to provide a more constant flow rate especially with thicker and harder walled tubing.