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:
Nov. 20, 2018
Filed:
Oct. 07, 2011
Paul Hadváry, Biel-Benken, CH;
Hansjörg Tschirky, Sissach, CH;
Paul Hadváry, Biel-Benken, CH;
Hansjörg Tschirky, Sissach, CH;
PharmaSens AG, Biel-Benken, CH;
Abstract
In a syringe type pump with a barrel () and a piston () movable in the interior of the barrel the barrel has the shape of a segment of a toroidal tube () and the piston is moved by means of a driving rod () which is guided and supported by the inner surface of the barrel wall. By the toroidal shape the overall size of the pump is significantly reduced and by guiding and supporting the driving rod of the piston by the inner surface of the barrel wall intrinsic problems of tightness, stick-slip phenomena and blockage are solved. A device for injecting fluid into a patient's body or removing body fluid therefrom is using a syringe type pump with a toroidal barrel and a driving rod of the piston guided and supported by the inner surface of the barrel wall.