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. 27, 1976
Filed:
Jul. 31, 1974
Danny L Dunlap, Minster, OH (US);
Charles E Huelsman, Minster, OH (US);
John H Muhlenkamp, Minster, OH (US);
Stamco Division, The Monarch Machine Tool Company, New Bremen, OH (US);
Abstract
A mandrel assembly in which the mandrel segments are expanded and contracted by means of a draw rod extending through the mandrel and driven by the same motor that rotates the mandrel during winding or unwinding operations. The draw rod is fixed for rotation with the mandrel but is movable longitudinally thereof and is provided with power threads on one end which are in engagement with complementary power threads on a nut member carried by the motor shaft. A drive gear is keyed to the nut member so that it is rotatable with the nut member but capable of movement longitudinally thereof into and out of engagement with a driven gear secured to the mandrel. A nonrotatable gear segment is mounted for shifting movement with the drive gear and moves into engagement with the driven gear as the drive gear is disengaged from the driven gear to lock the mandrel against rotation. When the mandrel, and hence the draw rod, are thus locked against rotation, continued rotational movement of the nut member results in longitudinal movement of the draw rod and radial movement of the mandrel segments.