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:
Jan. 21, 1997
Filed:
Feb. 07, 1994
Applicant:
Inventor:
Xu X Hua, Shenyang City 110024, CN;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23Q / ;
U.S. Cl.
CPC ...
269 481 ; 269 63 ; 279-212 ; 279-217 ;
Abstract
A mandrel for use in processing a workpiece having an internal spline. The mandrel includes an expandable collet having an upper expandable spline-shaped portion and a lower portion with a groove adapted to receive two half-keys. Inside the expandable collet are a series of sleeves and steel balls. A bolt having a conical head and a nut hold the mandrel together. As the nut is tightened, the sleeves and balls cause the upper spline-shaped portion of the collet to expand to hold a workpiece having an internal spline. At the same time, the half-keys are forced apart in the key-way of an indexing rotary table to accurately position the mandrel on the table.