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:
Apr. 23, 2002
Filed:
Dec. 30, 1999
Akio Higuchi, Tokyo, JP;
Hayato Hyugaji, Tokyo, JP;
Dr. Japan Co., Ltd., Tokyo, JP;
Abstract
A medical anesthetic needle which comprise an outside needle and a mandrin inserted into the outer needle to freely move in and out, and is slightly bent upward at is tip when its needle axis is positioned horizontal. The mandrin is manufacture by a first step of cutting the tip end of a metallic wire such as stainless steel wires obliquely to form a blade surface which intersects the axis at a predetermined angle of the mandrin blade surface, a second step of cutting off that portion of the metallic wire, which extends from the underside of the wire up to a horizontal plane located at a higher level than the center line of the wire, in a columnar region between the upper end of the blade surface and a position rearwardly distant three times the diameter of the wire or more from the upper end, to form a blade tip, a split-columnar connection succeeding the blade tip, and a columnar portion succeeding the connection, and a third step of bending the connection in such a manner that the upper end of the blade surface becomes higher a predetermined distance than the upper surface of the columnar portion and the axis of the blade tip is inclined at a predetermined angle (&thgr;) relative to the horizontal, and cutting the entire length of the mandrin into a predetermined length.