Surface maintenance machine with computer controlled operational and maintenance systems

• US 5,940,928 A
• Filed: 01/15/1998
• Issued: 08/24/1999
• Est. Priority Date: 01/15/1998
• Status: Expired due to Term

• Current Assignee: Tennant Company
• Original Assignee: Tennant Company
• Inventors: Erko, Robert
• Primary Examiner(s): MOORE, CHRISTOPHER K
• Application Number:
  US09/007,669
• Time in Patent Office: 586 Days
• Field of Search: 15/319, 15/320, 15/339
• US Class Current: 15/319
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 19/0428 Safety, monitoring G05B19/0423 takes precedence

Abstract

A surface maintenance machine has a cleaning system which includes a rotatable brush and a mechanism for raising and lowering it, and a drive for propelling the machine in forward and reverse directions. There is a visual control screen for use by the operator which has a plurality of display sectors, at least some of which display multiple information icons. There are a plurality of buttons for use by the operator, at least some of which are each associated with a specific display sector. A central processing unit is connected to the visual control screen, the control buttons, the drive for the brush, and the drive for propelling the machine. There are sensors connected to the central processing unit and positioned on the machine to determine operating conditions in the cleaning system and the propelling system. A microprocessor evaluates instructions received from operation of the control buttons and the operating conditions determined by the sensors, and then issues commands to the cleaning system for operating the brush, its drive, the mechanism for raising and lowering the brush, the propulsion system and other appropriate systems.

Claims

1. A surface maintenance machine having a cleaning system including brush means and means for rotating said brush means, means for raising and lowering said brush means, drive means for propelling said surface maintenance machine in forward and reverse directions,

a visual control screen on said machine positioned for operator use and having a plurality of display sectors, at least some of said display sectors having means for displaying multiple information icons,

a plurality of operator actuatable control elements, at least some of which are each associated with a specific display sector,

a central processing unit (CPU) connected to said visual control screen and to said operator control elements, said CPU being connected to said brush means drive means, said means for raising and lowering said brush means and said drive means for propelling said machine,

a plurality of sensors connected to said CPU and positioned on said machine to determine operating conditions in said cleaning system and in said drive means for propelling said machine,

microprocessing means in said CPU for evaluating instructions received for operation of said control elements and the operating conditions determined by said sensors, and then issuing commands to said cleaning system for operating said brush means drive means, means for raising and lowering said brush means and said means for propelling said machine.

2. The surface maintenance machine of claim 1 wherein one of said control elements is a menu control, the successive operation of which will display different cleaning system options for use by an operator.

3. The surface maintenance machine of claim 2 wherein said cleaning system includes a scrub brush, a source of cleaning solution, a squeegee, means for raising and lowering the squeegee, and a recovery water container.

4. The surface maintenance machine of claim 2 wherein said cleaning system includes a sweeping brush, and a debris hopper.

5. The surface maintenance machine of claim 4 wherein said cleaning system includes means for raising and lowering said debris hopper, a hopper door, and means for opening and closing said hopper door.

6. The surface maintenance machine of claim 4 wherein said cleaning system includes a dust filter and means for applying a cleaning shaking force thereto.

7. The surface maintenance machine of claim 1 wherein said cleaning system includes a scrub brush, a source of cleaning solution, a squeegee, means for raising and lowering the squeegee, a recovery water container, a sweeping brush, a debris hopper, means for raising and lowering said debris hopper, a hopper door, and means for opening and closing said hopper door.

8. The surface maintenance machine of claim 1 wherein one of said control elements is a menu control, the successive operation of which will display different machine maintenance options for use by an operator.

9. The surface maintenance machine of claim 8 wherein successive operation of said menu control element will display different cleaning system options and different machine maintenance options for use by an operator.

10. The surface maintenance machine of claim 8 wherein said maintenance options include adjustment of brush means pressure on the surface being cleaned.

11. The surface maintenance machine of claim 8 wherein said maintenance options include displaying the status of portions of said cleaning system.

12. The surface maintenance machine of claim 8 wherein said microprocessor includes data as to the elapsed machine operating time before designated maintenance functions should be performed and means for displaying the required maintenance function after said elapsed time on said visual control screen in response to operation of said menu control element.

13. The surface maintenance machine of claim 12 wherein each time certain maintenance functions are performed, the sensors provide an indication thereof to said microprocessor, the elapsed time for that function is compared with the data stored in the microprocessor as to the recommended elapsed time for that function, if the actual elapsed time is different from the stored elapsed time, the microprocessor alters the stored elapsed time for that maintenance function to reflect the change between the actual elapsed time and the stored elapsed time.