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:
Jun. 25, 1998
Akio Higuchi, Tokyo, JP;
Hayato Hyugaji, Tokyo, JP;
Dr. Japan Co., Ltd., Tokyo, JP;
Abstract
A medical anesthetic needle ( ) is provided that includes an inner needle ( ) of a straight needle shape, having a pencil-pointed tip ( ), and an outer needle ( ) of a straight tubular shape, having the inner needle inserted thereinto and therethrough from the rear end thereof. A foremost-end part ( ) of a hollow, truncated conical shape or the like of the outer needle ( ) is formed so that the minimum inner diameter thereof is smaller than the outer diameter of the main body ( ) of the inner needle ( ). When the inner needle ( ) is inserted into and through the outer needle ( ), the circumferential fore-end edge of the foremost-end part ( ) is in close contact with the circumferential surface of the tip ( ) or the main body ( ) of the inner needle ( ), and no gaps are thus formed therebetween. Therefore, when needled, a patient's nervous tissue is unlikely to be nipped in a gap between the inner and outer needles to cause pain to the patient.