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:
Oct. 29, 2013
Filed:
Jun. 26, 2009
Fumio Tanaka, Chuo-ku, JP;
Mitsuhiro Haraguchi, Chuo-ku, JP;
Yoshihiko Kawasaki, Chuo-ku, JP;
Mutsumi Shibuya, Chuo-ku, JP;
Kiyoshi Wakabayashi, Matsudo, JP;
Yoshinori Katoh, Matsudo, JP;
Renji Hayashi, Matsudo, JP;
Fumio Tanaka, Chuo-ku, JP;
Mitsuhiro Haraguchi, Chuo-ku, JP;
Yoshihiko Kawasaki, Chuo-ku, JP;
Mutsumi Shibuya, Chuo-ku, JP;
Kiyoshi Wakabayashi, Matsudo, JP;
Yoshinori Katoh, Matsudo, JP;
Renji Hayashi, Matsudo, JP;
Showa Yakuhin Kako Co., Ltd., Chuo-ku, Tokyo, JP;
Abstract
A linear cartridge-type motorized dental syringe has a plunger rod aligned with a drive shaft of a motor, the externally threaded plunger rod movable longitudinally, but not rotatably, relative to the casing, a cylindrical body rotated by the shaft, a nut having arm-like nut halves with internal threads engaging external threads on the rod, a locking ring for rotation around an axis of the rod and for longitudinal movement between a rearward position where the ring forces the threads on the nut halves to engage the threads on the rod, and forward where the ring releases engagement of the threads, pusher pins for moving the ring rearward when the cartridge holder is inserted, and a spring for pushing the locking ring back to the forward position, with rotation of the cylinder body resulting in rotative motion of the nut around the rod to move it forward.