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:
Feb. 11, 2003
Filed:
Nov. 09, 2000
Mark D. Williams, Hampstead, MD (US);
Black & Decker Inc., Newark, DE (US);
Abstract
An overmolded motor bearing is provided for use with an electric motor. A conventional ball-bearing has a rubberized sleeve molded directly onto the bearing so that the bearing and insulating rubber sleeve form a unitary subassembly. The bearing sub-assembly is formed by inserting the conventional ball-bearing directly into the mold of an injection molding machine. Importantly, the rubberized material encapsulating the bearing extends around the outer bearing race and along the side faces of the bearing. In a preferred embodiment, separate nylon washers are installed on either side of the bearing when the bearing is inserted into the mold. The rubberized material is then injection molded around the outer bearing race to capture the nylon washers. The preferred embodiment thus prevents the bearing shields on the side faces of the bearing from being subjected to the injection molding pressures within the mold which can deform and thus damage the bearing shields.