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. 28, 2012
Filed:
Jun. 02, 2010
Yoshio Sato, Kanagawa-pref, JP;
Arinobu Mori, Kanagawa-pref, JP;
Tsuneaki Sudo, Kanagawa-pref, JP;
Shinichi Kurihara, Kanagawa-pref, JP;
Yoshio Sato, Kanagawa-pref, JP;
Arinobu Mori, Kanagawa-pref, JP;
Tsuneaki Sudo, Kanagawa-pref, JP;
Shinichi Kurihara, Kanagawa-pref, JP;
Obara Group Incorporated, Yamato-shi, Kanagawa, JP;
Abstract
A drive unit of a pressure device, such as a welding gun, includes a piezoelectric type load cell adapted to be arranged in an easily attached and removed manner and to have relatively small capacity. The drive unit includes a through-hole, formed in a rotary shaftof a drive motor, which is a drive source, and a pressure shaft, configured to be able to move with a part thereof being in the through-hole. The rotary shaftis rotatably supported by the bearing, and the piezoelectric type load cellis sandwiched between a preload striker plate, through which the pressure shaftpasses, and a preload setting striker plate, through which the pressure shaftpasses with a preload exerted on the load cell