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. 10, 2001
Filed:
Aug. 03, 1998
Masahito Shiozaki, Shizuoka-ken, JP;
Takeshi Momochi, Numazu, JP;
Hideo Fujie, Shizuoka-ken, JP;
Kazuo Nagashima, Shizuoka-ken, JP;
Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;
Abstract
A main-shaft malfunction-state detector in an air bearing type machine tool, in which an abnormal contact of a main shaft with a housing is reliably and automatically detected. The contacting state of the main shaft,and the housing,is detected through the presence of electric conductivity by a contact detection device,A contact decision device,determines the contact of the main shaft,with the housing,based on the detected conductivity, thus automatic and certain preventative measures, such as the main shaft of the machine tool stops and so on, are based on the above decision.