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:
Jun. 24, 2003
Filed:
May. 07, 2001
Yukio Kawagishi, late of Tokyo, JP;
Fumio Tanaka, Tokyo, JP;
Mutsumi Shibuya, Tokyo, JP;
Ikuo Kitagawa, Chiba-Ken, JP;
Renji Hayashi, Chiba-Ken, JP;
Yoshinori Katoh, Chiba-Ken, JP;
Other;
Abstract
An electrically-driven dental injector used in orally injecting such an injection liquid as an anesthetic in dental treatment. Electrically-driven dental injectors includes one having a mechanism for disengaging a pinion ( ) from a rack ( ) in order to retract a plunger rod ( ) upon completion of injection; however, it has heretofore been necessary to manually operate the operating part from outside each time. The inventive electrically-driven dental injector is so arranged that the plunger rod can be manually pushed back directly oupon completion of injection without requiring manual operation, and, to this end, the injector comprises a latch mechanism ( ) for engaging/disengaging the ring gear ( ) of a planetary reduction gear ( ) with/from a casing ( ), and an operating rod ( ) extending through a support member ( ) and functionally cooperating with the latch mechanism ( ).