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. 14, 1995
Filed:
Jul. 01, 1993
Roger R Smith, Erin, NY (US);
Hardinge Brothers Inc., Elmira, NY (US);
Abstract
An expanding collet assembly comprises an arbor having a flange portion for securing to a machine tool spindle and a shaft portion extending from the flange portion. The shaft portion includes a first conical surface disposed at its free end and a second conical surface disposed adjacent the flange portion. Conical surfaces are parallel to each other and disposed radially inwardly in the direction away from the flange portion. An expanding collet having alternately disposed slots to form a plurality of fingers extend inwardly from opposite collet ends and have inner conical surfaces at the collet ends that cooperate with the first and second conical surfaces. The expanding collet is axially slidably disposed around the shaft portion between a relaxed position when the collet is disposed away from the flange portion and an expanded position when disposed toward the flange portion. A draw plug with a flanged head in engagement with one end of the collet is disposed axially through the arbor in an opening in the shaft portion. A draw bar adapter is disposed within a recess in the arbor and secures one end of the draw plug, the adapter being secured to a draw bar for axially actuating the draw plug, thereby actuating the collet. An annular work locating stop is secured to the flange portion and overlies at least a portion of the collet, the stop having an annular free edge for abutting against a workpiece. Another embodiment of the expanding collet assembly for smaller workpieces is also disclosed.