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:
Aug. 09, 2016
Filed:
Dec. 27, 2010
Fumio Tanaka, Kawasaki, JP;
Mitsuhiro Haraguchi, Shiraoka, JP;
Yoshihiko Kawasaki, Tokyo, JP;
Mutsumi Shibuya, Yokohama, JP;
Renji Hayashi, Matsudo, JP;
Yoshinori Kato, Matsudo, JP;
Akiko Kawasaki, Yokohama-shi, JP;
Fumio Tanaka, Kawasaki, JP;
Mitsuhiro Haraguchi, Shiraoka, JP;
Yoshihiko Kawasaki, Tokyo, JP;
Mutsumi Shibuya, Yokohama, JP;
Renji Hayashi, Matsudo, JP;
Yoshinori Kato, Matsudo, JP;
Showa Yakuhin Kako Co., Ltd., Chuo-ku, Tokyo, JP;
Abstract
Provided is an anesthetic solution-filled cartridge-type electric dental syringe, wherein the plunger has been shortened but the plunger can nevertheless be extended to the distance necessary to evacuate the anesthetic solution from the cartridge. The syringe comprises: an extension tube into which a plunger is movably inserted, the extension tube being movably disposed in the through hole of a support block and having racks formed in the side surface thereof that are coordinated with the racks of the plunger; and a means for the plunger to draw the extension tube to engage the racks of the extension tube with a pinion when the plunger reaches the middle of the distance corresponding to the anesthetic solution accommodation length of the cartridge. By the engagement of the racks of the extension tube with the pinion, the plunger moves together with the extension tube for the remainder of the distance corresponding to the anesthetic solution accommodation length of the cartridge.