CARPET SWEEPER

• US 3,863,285 A
• Filed: 07/05/1973
• Issued: 02/04/1975
• Est. Priority Date: 07/05/1973
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Hoky
• Original Assignee: Hiroshi Hukuba
• Inventors: Hukuba, Hiroshi
• Primary Examiner(s): Roberts, Edward L.
• Application Number:
  US05/376,700
• Time in Patent Office: 579 Days
• Field of Search: 15/41 R-48/
• US Class Current: 15/48
• CPC Class Codes: A47L 11/33 having means for storing dirt
• CPC Class Codes: A47L 11/40 Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
• CPC Class Codes: A47L 11/4013 Contaminants collecting devices, i.e. hoppers, tanks or the like
• CPC Class Codes: A47L 11/4041 Roll shaped surface treating tools

Abstract

A carpet sweeper with provision of: a rotating brush supported transversely within the lower portion of a housing to sweep up the dust on the floor when said housing moving there along; a pair of cleaning combs attached to said housing in parallel with the axis of said rotating brush, in such a manner that each of them is disposed above but just behind the rotating brush when said rotating brush moves forward along the floor surface, so that the teeth of the cleaning comb can penetrate themselves deeply into the rotating brush to take away therefrom the dust adhered thereto; and a dust receiver positioned just behind said cleaning comb so as to receive the dust cleared off from the rotating brush by the cleaning comb, said cleaning comb being provided between the teeth thereof with an interval several times as wide as the width of a single tooth and on the bottom edge of each interval with a small projection, whereby the tip of said small projection rubs the peripheral surface of the rotating brush and the bottom edge of said interval is barely brought into contact with the same when the tip of each tooth goes deep into the rotating brush.

Claims

1. A carpet sweeper, comprising in combination:

a rotating brush supported transversely within the lower portion of a housing to sweep up the dust on the floor during movement of said housing along the floor surface;

a cleaning comb attached to said housing in parallel with the axis of said rotating brush in such a manner that it is positioned above and behind the rotating brush relative to the direction of movement along the floor, the comb having elongated teeth and being pOsitioned so that the teeth penetrate deeply into the rotating brush to rake therefrom the dust clinging thereto; and

a dust receiver disposed just behind said cleaning comb for reception of the dust raked away from the rotating brush by said cleaning comb;

the improvement wherein said cleaning comb has a substantially flat base plate with a plurality of said elongated teeth projecting outwardly from one edge thereof, the adjacent teeth being spaced apart by a space having a width several times greater than the width of a single tooth, a plurality of small triangular-shaped projections projecting outwardly from said one edge of said base plate, said projections being spaced between said teeth and projecting into said spaces, said projections having a length which is extremely small in comparison to the length of said teeth, and said projection having a width at the base end thereof which is substantially less than the width of said space so that there remains a substantially straight base edge of substantial length extending between the base end of the projection and the base end of an adjacent tooth, said comb being positioned adjacent said brush so that the teeth penetrate deeply into said brush while the tips of the projections slide along the periphery of the brush and the base edge of each space barely comes into contact with the periphery of the brush.

2. A carpet sweeper according to claim 1, wherein a pair of said cleaning combs are disposed on opposite sides of the rotating brush and just above the brush in order that the teeth of the cleaning comb located just behind the rotating brush during forward movement thereof can penetrate deeply into the brush while the other comb located on the opposite side of the brush stays in such a position as to prevent the teeth thereof from deeply penetrating into the brush, and means movably mounting said pair of combs relative to said housing for permitting said pair of combs to be synchronously shifted laterally relative to said brush so that shifting of the combs in one direction causes the teeth of one comb to deeply penetrate the brush while the teeth of the other comb are withdrawn from the brush, said combs when shifted into a second position having the teeth of the other comb deeply penetrating the brush while the teeth of said one comb are withdrawn from said brush.

3. A carpet sweeper according to claim 1, wherein the comb has only a single projection located between each pair of adjacent teeth.