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. 02, 2001
Filed:
Jul. 10, 1997
Russell J. Bohart, Baltimore, MD (US);
Dale K. Wheeler, Fallston, MD (US);
Black & Decker Inc., Newark, DE (US);
Abstract
A brush assembly preferably for a universal motor comprises a tubular brush holder,, a carbon brush,, an arm,for biasing the brush and a spring,for biasing the arm. The brush is slidably mounted in the cavity,of the holder. A stop,is formed between the brush and the holder and has a disengaged position to permit travel of the brush partially through the inner end,of the holder and an engaged position to limit travel of the brush through the inner end,of the holder. The electrically conductive arm,is pivotally mounted on the support and extends through a slot,of the holder. A distal end,of the brush engages the outer end,of the brush and biases the brush,toward the inner end,of the cavity. The spring,is connected between the support,and the arm,for biasing the arm,into engagement with the brush,. The arm is spaced outwardly of the end of the slot to apply a bias to the brush when the stop is in an engaged position. As a result the brush, when worn out is firmly held between the arm and the stop to reduce degradation of the arm,and commutator