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:
Jul. 06, 1993
Filed:
Jul. 31, 1991
Tatsuo Tsuchiya, Asahi, JP;
Kenichi Sueyoshi, Asahi, JP;
Kuroda Precision Industries Ltd., Kanagawa, JP;
Abstract
This invention relates to a chuck device with multistage degree of opening composed of an oscillating actuator acting as a driving part and an arm opening or closing mechanism installed at one end part to which an output shaft of the oscillating actuator is projected, the actuator having a plurality of oscillating vanes concentrically arranged within casings, the casing for an inner oscillating vane structure being rotatably supported in respect to the casing for an outer oscillating vane structure so as to form a rotary shaft and at the same time an oscillating vane of the outer oscillating structure is fixed to the rotary shaft. The output shaft is connected to the oscillating vane of the inner-most oscillating vane structure so as to enable its intermediate stopping to be attained, the arm opening or closing mechanism being comprised of a pair of guide rail blocks oppositely arranged in a spaced-apart relation at both sides of the output shaft while being crossed at a right angle with an extending direction of the output shaft and fixed to the end of the outer-most casing of the oscillating actuator.