Appeal No. 2003-0025
Application No. 09/019,871
BACKGROUND
Appellants’ invention relates to a brush assembly for a power tool to apply bias at
substantially constant force directly onto a brush surface. An understanding of the
invention can be derived from a reading of exemplary claim 1, which is reproduced
below.
1. A brush assembly for an electric motor comprising:
a base, said base including a member for securing said base with a
motor spider assembly;
a brush housing associated with said base, said housing having
first and second open ends;
a brush, defining a longitudinal axis, movably positioned in said
housing between said first and second open ends, and said brush
extending from one of said open ends of said housing, said brush
including a surface, and a recessed portion, said recessed portion
including said surface, said surface being at a desired angle with respect
to the brush longitudinal axis;
a biasing member exerting a substantially constant force directly on
said brush surface in the direction of the longitudinal axis for biasing said
brush into electrical contact with a commutator; and
an electrical connector electrically coupled with said brush for
electrical connection between the commutator and a power supply.
The prior art references of record relied upon by the examiner in rejecting the
appealed claims are:
Sekyra 2,194,620 Mar. 26, 1940
Cousins et al. (Cousins) 4,593,220 Jun. 03, 1986
Peot et al. (Peot) 5,907,207 May 25, 1999
2
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