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:
Jul. 04, 2000
Filed:
Dec. 04, 1996
Nissho Corporation, Osaka-fu, JP;
Abstract
A method for making an outer cannula of an intravenous cannula. An insert pin (3) is inserted into an outer cannula (1) having a hub (12) and a tube (11) made of a shape memory polyurethane resin and having an untreated distal end portion, until a tip end of the insert pin (3) reaches a position retracted from a distal end of the tube (11). While holding the position of the insert pin (3), the tube (11) with the insert pin (3) is forced into a cavity in a mold (4) heated to a temperature of 120.degree. C. to 180.degree. C. until the insertion of the tube into the cavity is obstructed. Subsequently, the insert pin (3) is moved within the tube (11) toward the extremity of the tube until the tip end of insert pin (3) reaches a first predetermined position in the mold (4). After maintaining the tube at the mold temperature until the tube is softened, the insert pin is further moved within the tube toward the extremity thereof and held in position for a certain period of time. The mold (4) is then cooled for a certain period of time. Then, the tube (11) is removed from the mold (4) together with insert pin (3), and subsequently the insert pin (3) is removed from the tube (11). Finally, the distal end portion of the tube (11) is cut to a desired length.