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:
May. 01, 2001
Filed:
Feb. 19, 1999
Applicant:
Inventor:
William R. Lessig, III, Hunt Valley, MD (US);
Assignee:
Black & Decker, Inc., Newark, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 2/920 ;
U.S. Cl.
CPC ...
F04D 2/920 ;
Abstract
A fan retention system for a blower/vacuum securely retains the fan and creates an insulating barrier to prevent the operator from touching the functionally insulated armature shaft. A nut having interlocking ramps for interlocking with interconnecting portions on an abutting fan surface is provided. The interconnecting portions of the fan may be either ramps or recesses. Furthermore, the nut has a closed end for insulating the armature shaft from the operator.