Sweeper with auxiliary brush and auxiliary lip

• US 6,035,479 A
• Filed: 05/12/1998
• Issued: 03/14/2000
• Est. Priority Date: 05/12/1998
• Status: Expired due to Term

• Current Assignee: Tennant Company
• Original Assignee: Tennant Company
• Inventors: Danielson, Christopher M., Basham, Michael T., D'Costa, Joseph F.
• Primary Examiner(s): Warden, Sr., Robert J.
• Assistant Examiner(s): MCNEIL, JENNIFER C
• Application Number:
  US09/076,251
• Time in Patent Office: 672 Days
• Field of Search: 15/82, 15/83, 15/84, 15/85, 15/86, 15/52.1, 15/340.4
• US Class Current: 15/83
• CPC Class Codes: E01H 1/0854 Apparatus in which the mechanically dislodged dirt is partially sucked-off, e.g. dislodging- sweeping apparatus with dirt collector in brush housing or dirt container mechanical dislodging machines with independent suction nozzles E01H1/0827; combined with blowing and suction E01H1/0872

Abstract

A sweeper movable over a surface to be swept includes a frame having a longitudinal axis parallel to the direction of sweeper movement and a debris hopper mounted on a front portion of the frame. There is an opening in the rear of the debris hopper to admit debris. A first brush rotates about an axis transverse to the longitudinal axis of the frame and is located behind the debris hopper and has a motor for rotating the brush to throw surface debris forward into the hopper. There is a second brush which is also rotatable on an axis transverse to the longitudinal axis of the frame, with the second brush being positioned away from the surface to be swept and in front of the first brush. There is an auxiliary sweeping lip positioned closely adjacent to the second brush, which lip and the second brush add momentum to debris swept by the main brush into the hopper, so that the hopper is more fully loaded. The improvement is especially notable when sweeping light debris such as crumpled paper, leaves, etc.

Claims

1. A sweeper movable over a surface to be swept, including a frame having a longitudinal axis parallel to the direction of sweeper movement, a debris hopper mounted on a front portion of the frame, an opening in the rear of the debris hopper to admit debris therein, a first tool comprising a rotatable cylindrical brush having an axis transverse to the longitudinal axis of the frame, said first tool being located behind the debris hopper, in the direction of movement of the sweeper, means for rotating said first tool to move debris through a particular trajectory into said debris hopper,

a second tool comprising a rotatable cylindrical means having an axis transverse to the longitudinal axis of the frame, said second tool being positioned adjacent said first tool and away from the surface to be swept, means for moving said second tool toward and away from the surface being swept, and an auxiliary sweeping lip under the second tool and located closely adjacent thereto, means for rotating said second tool in the same direction as said first tool to add momentum to debris swept by the first tool and toward the debris hopper.

2. The sweeper of claim 1 wherein said second tool is a rotatable brush.

3. The sweeper of claim 2 wherein said auxiliary sweeping lip extends forwardly of said second brush and an upper surface of said auxiliary sweeping lip is closely adjacent the periphery of said second sweeping brush.

4. The sweeper of claim 2 wherein said auxiliary sweeping lip extends forwardly and upwardly toward said debris hopper.

5. The sweeper of claim 2 wherein said second rotatable brush and said auxiliary sweeping lip are upwardly movable to permit said second brush and said auxiliary sweeping lip to slide up and over large debris passing thereunder.

6. The sweeper of claim 1 wherein said auxiliary sweeping lip is movable independently of said second tool.

7. The sweeper of claim 6 wherein there are hydraulic means for raising and lowering said second tool and there are separate and independent hydraulic means for raising and lowering said auxiliary sweeping lip.

8. The sweeper of claim 1 wherein said debris hopper includes a lip extending downwardly and rearwardly from said debris hopper and in contact with a surface to be swept, said debris hopper lip being at least in part flexible at the lower end thereof.

9. A sweeper movable over a surface to be swept, including a frame having a longitudinal axis parallel to the direction of sweeper movement, a debris hopper mounted on a front portion of the frame, an opening in the rear of the debris hopper to admit debris therein, a first tool comprising a rotatable cylindrical brush having an axis transverse to the longitudinal axis of the frame, said first tool being located behind the debris hopper, in the direction of movement of the sweeper, means for rotating said first tool to move debris through a particular trajectory into said debris hopper,

a second tool comprising a rotatable cylindrical means having an axis transverse to the longitudinal axis of the frame, said second tool being positioned adjacent said first tool and away from the surface to be swept, and an auxiliary sweeping lip under the second tool and located closely adjacent thereto, said second tool being movable independently of said auxiliary sweeping lip, means for rotating said second tool in the same direction as said first tool to add momentum to debris swept by the first tool and toward the debris hopper.