HYGIENIC TOOTHBRUSH

• US 3,792,504 A
• Filed: 09/25/1972
• Issued: 02/19/1974
• Est. Priority Date: 09/25/1972
• Status: Expired due to Term

• Current Assignee: Donald G. Smith
• Original Assignee: Donald G. Smith
• Inventors: Smith, Donald G.
• Primary Examiner(s): Feldman, Peter
• Application Number:
  US05/292,267
• Time in Patent Office: 512 Days
• Field of Search: 15/167R,167A,110,160
• US Class Current: 15/167.1
• CPC Class Codes: A46B 9/04 Arranged like in or for toothbrushes

Abstract

A toothbrush with a formation of bristles arranged to comply with the shape of teeth and more particularly to clean the gum surfaces between teeth and the mating sides thereof.

Claims

1. A toothbrush comprising a substantially straight plastic handle including an integral brush body means extending longitudinally from one end of said handle, one side of said body means including an integral central ridge of predetermined length and height and uniform cross section and having a linear concave longitudinal shape of predetermined radius, said one side of said body means including a marginal planar surface of predetermined width extending around and in junction with the base of said ridge, a plurality of equi-spaced first holes in and along the top of said ridge radial curved with respect to said radius, a tuft consisting of substantially a predetermined number of bristles bonded in each of said holes along said ridge normal to the top edge thereof, a second plurality of holes around the said marginal planar surface and normal thereto positioned in close proximity with the said base junction of said ridge with the bottom of each of said holes convergent upward toward said ridge, each of said second holes having like said number of bristles bonded therein forming a plurality of tufts with the upper end portions thereof terminating in an angle toward the top of said ridge.

2. The construction recited in claim 1 wherein the said ridge is molded integral with the brush body means and is centrally positioned along one side of said body means and terminates in a rounded outer edge of predetermined radius.

3. The construction recited in claim 1 wherein all bristles in each tuft are inserted and bonded in holes having right angled bottom surfaces and the opposite ends of the bristles cut into uniform length and forming a generally inverted longitudinal V-shape.