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. 25, 1985
Filed:
Sep. 30, 1982
Issei Imahashi, Yamanashi, JP;
Teruo Asakawa, Nirasaki, JP;
Telmec Co., Ltd., Nirasaki, JP;
Abstract
A first stage adapted to be moved in predetermined directions by a first driving device is provided in a machine base supported from a foundation by an intermediary of resilient means. This first stage is provided a second stage adapted to be moved in the directions at right angles to the directions of movement of the first stage by a second driving device. Upon movement of these respective stages, vibration of the machine base is excited by reaction forces exerted upon the machine base as a result of acceleration and deceleration. These reaction forces are offset by resistive forces generated by first and second force generators respectively. The first and second force generators establish an electromagnetic coupling between the foundation and the machine base. The first force generator is made to act against the first driving device, and the second force generator is made to act against the second driving device, in such manner that the first and second force generators generate forces directed in the opposite directions to and having substantially the same magnitudes as the reaction forces exerted upon the machine base by the first and second driving devices, respectively. This occurs simultaneously with energization of the corresponding driving devices and effectively suppresses vibration of the machine base.