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:
Jul. 07, 1998
Filed:
Jun. 22, 1996
Larry Wilson, Belton, SC (US);
Glenn L Salpaka, Evansville, IN (US);
Valerie Owens, Townville, SC (US);
Power Tool Holders Incorporated, Wilmington, DE (US);
Abstract
A chuck for use with a manual or powered driver having a rotatable drive shaft includes a body and a primary gripping mechanism utilizing a three-jaw assembly actuated by a nut driven by a sleeve. The chuck includes a supplemental tightening mechanism. The supplemental tightening mechanism includes at least one L-shaped lever having a portion disposed between the nut and nose section of the body of the chuck. The nut can include a passage through which the lever passes. The lever bar will push off a hardened washer disposed against the body and thus force the nut forward to produce an enhanced gripping force on the tool through the jaws. The supplemental tightening mechanism can further include a detent to restrain relative rotation between the nut and the sleeve. The detent can include a groove formed in the nut and a resilient retaining clip held by the sleeve to selectively engage the groove.