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. 15, 1986
Filed:
Aug. 29, 1984
Osada Electric Co., Ltd., Tokyo, JP;
Abstract
A spring chuck has a clamp member opening mechanism comprising a guide groove formed in a rotating shaft and inclined in one direction, a guide groove formed on a wall surface of a bar stopper and inclined in the other direction opposite to the one direction, a push member, a holding hole formed in the push member, and a ball held in the holding hole in the push member, one projection of which is engaged with the guide groove in the rotating shaft and the other projection of which is engaged with the guide groove in the bar stopper. When the push member is moved downward, the rotating shaft and the bar stopper are rotated in opposite directions, and the relative rotation between the rotating shaft and the bar stopper becomes a sum of rotational angles of the rotating shaft and the bar stopper. A displacement of an upper cover and the push member becomes small, so that the clamp member opening mechanism can be held in a head case.