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. 26, 1988
Filed:
Nov. 25, 1986
Franz Glaser, Nuremberg, DE;
Hertel Aktiengesellschaft Werkzeuge & Hartstoffe, Furth, DE;
Abstract
In a rapid release chucking device, particularly for drills, including a machine spindle (1) and a tool head (2) attached thereto in a manner secure against rotation, wedge faces (9) are provided at the circumference of a spreadable ring element (14). In the unspread state, this ring element lies withdrawn in an annular groove (15) surrounding the spindle end (3). A control slide (16) is mounted in the spindle (1) so as to be axially displaceable by an externally initiated displacement movement. A plurality of spreading elements (18) lie in openings (17) which radially penetrate the spindle end (3) and open into the annular groove (15). Axial displacement of control slide (16) causes the openings to be urged radially outwardly toward the inner ring wall (19) of the ring element (14). At the same time, the inner wedge faces (9) of the ring element are urged against a corresponding, conical inner ring flank (24), into position where the wedge is tightened.