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:
Sep. 18, 1984
Filed:
Mar. 01, 1982
Applicant:
Inventor:
Jan F Wenstrup, Doylestown, PA (US);
Assignee:
Air-Shields, Inc., Hatboro, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417477 ;
Abstract
Infusion pumping apparatus having means for releasing back pressures which can develop in an infusion tube (18) through which fluid is being driven. When an excessive back pressure is developed, the infusion tube expands into a peripheral groove (43) on a drive roller (38) carried at the periphery of a rotor body (20).