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:
Dec. 07, 1999
Filed:
Jul. 21, 1998
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A tool clamp mechanism includes a hollow spindle in which a tool can be inserted, the spindle having at least one slot which is axially elongated, a draw bar movably provided in the spindle, and a spindle head which rotatably supports the spindle. A drive ring is provided around the spindle. The drive ring and the draw bar are connected by a connecting pin which penetrates the drive ring and the draw bar through the slot of the spindle. A pusher lever is provided to the spindle head, which urges the drive ring so that the draw bar releases the tool. The drive ring has a contact surface which the pusher lever abuts. The contact surface is positioned ahead of the connecting pin in a pushing direction of the pusher lever.