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. 18, 1997
Filed:
Sep. 28, 1995
Terumi Matsuda, Nishinomiya, JP;
Nobuo Tanaka, Osaka, JP;
Takeda Chemical Industries, Ltd., Osaka, JP;
Abstract
A syringe has a tubular body provided at its front end portion with a portion for mounting an injection needle thereon and opens at its rear end portion so as to have a rear end opening. A gasket for sealing the rear end opening of the tubular body is slidably inserted into the tubular body. A plunger rod is detachably coupled with a rear end portion of the gasket through the rear end opening of the tubular body. A male screw is formed at a front end portion of the plunger rod and is circumferentially alternately divided into at least one male screw portion and at least one first recess portion. A female screw is formed on a rear end face of the gasket and is circumferentially alternately divided into at least one female screw portion and at least one second recess portion. A state where the male screw portion and the first recess portion of the male screw are, respectively, fitted into the second recess portion and the female screw portion of the female screw, the male screw is rotated relative to the female screw so as to be brought into engagement with the female screw such that the plunger rod is coupled with the gasket.