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:
Nov. 06, 1990
Filed:
May. 27, 1988
Bernhard Palm, Brookfield, WI (US);
Milwaukee Electric Tool Corporation, Brookfield, WI (US);
Abstract
The chuck body is centered on the power tool drive spindle by placing the smooth bore in the body over the smooth cylinder on the spindle with the recesses on the body axially moved onto the lugs (splines) on the shoulder of the spindle. The retaining screw is threaded into the end of the spindle and the screw head forces the chuck body against the shoulder. Neither the screw nor the bore/cylinder transmit torque; only the drive lugs transmit torque so the chuck can't jam on the spindle. This mount works with keyed chucks or keyless chucks as illustrated where the three inclined jaws are threadably engaged by split nut having a retainer pressed thereon. A clutch sleeve is biased rearward from the split nut and is moved towards the nut to engage interference lugs on the sleeve with lugs on the nut to restrain nut rotation to open or close the jaws. As the jaws approach full open, they push the sleeve to disengage the lugs. A spline coupler restrains sleeve rotation but can be omitted. This chuck construction can mount directly onto standard threaded splindles of existing tools.