Surface maintenance equipment

• US 4,320,556 A
• Filed: 09/12/1980
• Issued: 03/23/1982
• Est. Priority Date: 09/12/1980
• Status: Expired due to Term

• Current Assignee: Tennant Company
• Original Assignee: Tennant Company
• Inventors: Kimzey, Paul W., Hanna, John L.
• Primary Examiner(s): Moore, Chris K.
• Application Number:
  US06/186,705
• Time in Patent Office: 557 Days
• Field of Search: 15/340, 15/346, 15/347, 15/348, 15/349
• US Class Current: 15/347
• CPC Class Codes: E01H 1/0845 with mechanical loosening or feeding instruments for the dirt to be sucked- up, e.g. brushes, scrapers brushing installations per se E01H1/02; other loosening devices per se E01H1/105

Abstract

The present invention provides surface maintenance equipment, such as for sweeping lawns, such equipment including a skirt structure for the debris pickup housing.

Claims

1. Surface maintenance equipment comprising:

body structure and a plurality of wheels supporting said body structure, said body structure including a hopper, a downwardly opening housing defining a debris pickup chamber, and means for conveying debris from said pickup chamber to said hopper, said pickup housing including downwardly extending skirt means for partially sealing around the perimeter of said pickup chamber, at least a portion of said skirt means comprising in cross-section a substantially closed S-shaped stabilizing member and a vertically oriented skirt overlying said stabilizing member, said stabilizing member and skirt being comprised of a resilient material, whereby said stabilizing member resiliently urges said skirt into sealing engagement with the surface being maintained.

2. The surface maintenance equipment of claim 1 wherein the stabilizing member and vertically oriented skirt combination are provided along the forward edge of said pickup housing.

3. The surface maintenance equipment of claim 2 wherein a plurality of thickened vertically oriented resilient fingers are disposed between and spaced along said stabilizing member and skirt, said fingers serving to assist in urging said skirt toward a sealing position.

4. The surface maintenance equipment of claim 3 wherein said pickup housing includes an upwardly and forwardly pivotable bracket for supporting said stabilizing member and skirt.

5. The surface maintenance equipment of claim 2 wherein said pickup housing includes an upwardly and forwardly pivotable bracket for supporting said stabilizing member vertically oriented lip.

6. Surface cleaning apparatus comprising:

body means supported on a plurality of wheels, a hopper and a vacuum fan carried by said body means, power means for driving said wheels and said vacuum fan, a downwardly opening housing defining a sweeping chamber, said housing being supported by said body means and communicating with said hopper, said vacuum fan acting to vacuumize said housing, said housing having sealing skirt assemblies around the periphery thereof, the skirt assembly disposed along the forward side of said housing comprising a vertically disposed resilient sheet providing a skirt and a stabilizing member disposed behind said sheet, said stabilizing member comprising in cross-section a forward vertical wall portion, and integral lower arcuate wall portion, an integral diagonal wall portion, an integral upper arcuate wall portion and an integral depending wall portion.

7. The apparatus of claim 6 wherein the lower end of said depending wall portion lies adjacent and parallel with the lower portion of said diagonal wall portion, said lower end being secured to said diagonal portion.

8. Surface maintenance equipment comprising:

body structure and a plurality of wheels supporting said body structure, said body structure including a hopper, a downwardly opening housing defining a debris pickup chamber, and means for conveying debris from said pickup chamber to said hopper, said pickup housing including downwardly extending skirt means for partially sealing around the perimeter of said pickup chamber, at least a portion of said skirt means comprising in cross-section a substantially closed S-shaped member, said member being a resilient material, whereby said member provides sealing engagement with the surface being maintained.