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. 24, 1989
Filed:
May. 21, 1987
Rudolph W Wacek, Montoursville, PA (US);
R Lent Crevling, Jr, Williamsport, PA (US);
Shop-Vac Corporation, Williamsport, PA (US);
Abstract
A small electric motor includes a wound rotor or armature, a segmented commutator and brushes biased lengthwise against the commutator for providing a circuit through which the armature is energized. Each brush is part of an assembly that also includes a conducting brush tube from which the brush extends, and an insulating tube in which the brush tube is frictionally held. Aligned pivot projections extend transversely from opposite sides of the insulating tube and are received by recesses in the motor frame. The recess walls provide bearing formations that are engaged by the pivot projections to cooperate therewith so that during mounting of the insulating tube and elements assembled therewith, the insulating tube is pivoted from an oblique intermediate position to a final operating position. A single screw threadably engaged in the motor frame locks the insulating tube in this final operating position. Tightening of this screw generates a wedging action that stabilizes the insulating tube in its final operating position.