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:
Mar. 07, 1989
Filed:
Sep. 03, 1987
Motonori Kobara, Futtsu, JP;
Kuroda Seiko Company Limited, Kanagawa, JP;
Abstract
A tap holder for detachably securing a tool to a machine tool including a main portion having a shank which is to be secured to a main shaft of the machine tool, a quick change portion having a float shaft which is inserted into a hole formed in the main portion and a quick change mechanism including a clamp collar, a first coiled spring for pressing the clamp collar toward the main portion, steel balls arranged in holes formed in the float shaft, a supporting ring slidably inserted into the float shaft and a second coiled spring for pressing the supporting ring toward a tool, and a tool supporting portion including a driven shaft whose rear end has a recess formed therein and is inserted into the float shaft and a torque control mechanism. By moving the clamp collar toward the main portion against the resilient force of the first coiled spring, the engagement between the steel balls and the recess of the driven shaft is released and the tool holding portion is removed from the quick change portion.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile