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:
Feb. 02, 1993
Filed:
Feb. 25, 1992
Kazuo Sakamaki, Ojiya, JP;
Yukiwa Seiko Kabushikikaisya, Ojiya, JP;
Abstract
A chuck for a tool is provided, which firmly fastens the working tool and can maintain the fastened state of the tool even when added vibration to be caused during operation. A plurality of jaws are obliquely provided relative to the axis of a chuck body, a grip sleeve is provided close to the rear end portion of the chuck body in unmovably fitted condition relative to the chuck body, a male screw portion is formed on the outer peripheral surface of each jaw, a nut sleeve is rotatably mounted to the chuck body, a female screw portion is provided on the inner peripheral surface of the nut sleeve, a rotational sleeve is provided in axially slidable condition to the chuck body but unrotatably engaged to the said nut sleeve, and the male screw portion and the female screw portion are engaged with each other, and whereby when said rotational sleeve is rotated by hand, the jaws are advanced/retracted to thereby clamp/release the tool. The rotational sleeve is slidably provided in the axial direction of the chuck body; a positioning mechanism for axial sliding movement of the rotational sleeve and a rotation preventing mechanism for preventing the rotational sleeve from rotating are provided; and said positioning mechanism and said rotation preventing mechanism are located at such positions where rotational operation and positioning operation of the rotational sleeve can be done easily by one hand gripping.