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:
Jun. 21, 1977
Filed:
Jul. 12, 1976
Donald Peter Stait, Steinmaur, CH;
Willi Zenger, Zurich, CH;
Contraves AG, Zurich, CH;
Abstract
A syringe for injecting liquids into blood vessels of living bodies comprising a cylinder equipped at one end with an attachment flange and at the other end with a catheter connection. A piston insertable into the cylinder and having a sealing ring arranged in a groove. Between the sealing ring and the inner wall of the cylinder there is arranged a substantially L-shaped slide ring operatively connected with the piston. This slide ring sealing bears by means of a first leg at the inner wall of the cylinder and by means of a second leg in a channel or recess which is parallel to the aforesaid groove. A substantially cylindrical shoulder extending from the channel up to an inclined portion of the tip of the piston extends at least to the center or center line of the deformed sealing ring.