Brushing – scrubbing – and general cleaning – Implements – Brush or broom
Reexamination Certificate
1999-03-29
2001-08-14
Chin, Randall E. (Department: 1744)
Brushing, scrubbing, and general cleaning
Implements
Brush or broom
C015S207200, C015SDIG005
Reexamination Certificate
active
06272714
ABSTRACT:
FIELD OF THE INVENTION
The invention relates generally to the field of oral are, and in particular to toothbrushes.
BACKGROUND OF THE INVENTION
U.S. Pat. No. 2,242,743 discloses a toothbrush having a handle
12
, a head
14
, and a plurality of tufts
16
of bristles which extend outward from the head. The tufts are positioned at an acute or obtuse angle with respect to the handle and head. The bristles provide a series of transverse, broad, inverted V-shaped areas on the working surface
18
. The free ends of the bristles of each tuft form a surface which is inclined away from the direction in which the tuft is inclined.
U.S. Pat. No. 3,085,273 discloses a toothbrush having a handle
10
with an elongated head portion
12
formed integrally with the head. Bristles
14
are mounted in the head portion and are formed in tufts
15
. The tufts are arranged in parallel rows
16
,
16
′ longitudinally of the head and inclined in the direction of the rows. The free end of the bristles of each tuft define a plane which is perpendicular to the direction in which the tuft extends from the head.
SUMMARY OF THE INVENTION
Briefly summarized, according to one aspect of the present invention, a toothbrush includes a handle, a head extending from the handle, and a tuft of bristles extending from the head. The tuft is inclined toward the handle such that the angle of inclination is an acute angle relative to a surface of the head through which the tuft extends. The bristles have free ends which define a plane, the plane being other than perpendicular to a direction in which the tuft extends from the head. A face of the plane is tilted towards the handle.
These and other aspects and features of the present invention will be more clearly understood and appreciated from a review of the following detailed description of the preferred embodiments and appended claims, and by reference to the accompanying drawings.
REFERENCES:
patent: 164353 (1875-06-01), Wayne
patent: D. 334288 (1993-03-01), Witzig-Jaggi
patent: 2242743 (1941-05-01), Brown
patent: 3085273 (1963-04-01), Cowan
patent: 3229318 (1966-01-01), Clemens
patent: 3346900 (1967-10-01), Stewart
patent: 4010509 (1977-03-01), Huish
patent: 4081876 (1978-04-01), Pugh
patent: 4412301 (1995-10-01), None
patent: 683311 (1930-06-01), None
patent: 2624360 (1989-06-01), None
patent: 8500178 (1986-08-01), None
Chin Randall E.
Gillette Canada Company
Howley David A.
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