David M Berg

US Patent:

20060282364, Dec 14, 2006

Filed:

Jun 13, 2005

Appl. No.:

11/151041

Inventors:

David Berg - Henderson NV, US

International Classification:

G06Q 40/00

US Classification:

705037000

Abstract:

A communication system and method for monitoring operation of a system in a facility and for sending out repair request has a monitoring device coupled to a system in the facility to be monitored. The monitoring device sends a notification signal when an operational problem is monitored. A receiving device is used for receiving the notification signal sent from the monitoring device. A client communication system is utilized for entering information for a repair order for the operational problem monitored. A repair maintenance server is coupled to the first computer system. The repair maintenance server receives the repair order information and sends bid requests to designated repair vendors. A plurality of vendor computer systems is coupled to the repair maintenance server for repair vendors to submit bids for the repair order. The repair maintenance server will select a vendor and notify the vendor of a winning bid.

US Patent:

47291419, Mar 8, 1988

Filed:

Jan 7, 1987

Appl. No.:

7/002288

Inventors:

David W. Berg - Plymouth MN
Steven V. Feeny - Plymouth MN

Assignee:

Tennant Company - Minneapolis MN

International Classification:

A47L 11162

US Classification:

15 49R

Abstract:

This is concerned with a disc brush suspension or arrangement for a scrubber or sweeper or the like. The arrangement uses a flexible bellows which may be of rubber or a suitable rubber substitute which functions as the total or primary suspension for the disc brush and its drive motor.

US Patent:

41856970, Jan 29, 1980

Filed:

Oct 7, 1977

Appl. No.:

5/840292

Inventors:

David A. Berg - Milwaukee WI

Assignee:

Allis-Chalmers Corporation - Milwaukee WI

International Classification:

A01B 63112

US Classification:

172 10

Abstract:

A draft load sensing mechanism for a vehicle having a torsion bar carrying the draft load from the lower draft arms which produce a torsion load on the bar. A preload adjusting screw applies a preload torque to the torsion bar and a load limit adjusting screw limits the maximum torque load that can be applied to the torsion bar responsive to the draft load on the vehicle.

US Patent:

60963832, Aug 1, 2000

Filed:

Apr 28, 1999

Appl. No.:

9/300921

Inventors:

David W. Berg - Plymouth MN
Bruce F. Field - Golden Valley MN
Norman William Gill - Plymouth MN
Joseph S. Keute - Blaine MN
Deone E. Johnson - Edina MN
Earl Oscar Frederick Krueger - Eagan MN

Assignee:

Tennant Company - Minneapolis MN

International Classification:

C08F 248
C08F 244
B32B 3128
B32B 3500

US Classification:

427493

Abstract:

A process for applying a coating to a floor surface and curing that coating after application includes the steps of first spreading a photochemically curable liquid coating in a thickness of from about 0. 003 to about 0. 006 inches on a floor surface. After the coating has been applied, it is exposed to ultraviolet radiation at a power level of about 40 watts per inch of width of coating being cured and at two different sequentially applied wavelengths. This cures the liquid coating instantly to a durable solid coating. The first applied ultraviolet radiation may have the wavelength of about 365 nm and the second applied ultraviolet radiation may have a wavelength of about 254 nm. The ultraviolet radiation is provided by an array of UV lights on a mobile, self-powered vehicle which moves over the floor coating at a speed in the range of 20 to 40 feet per minute.

US Patent:

59409290, Aug 24, 1999

Filed:

Jun 23, 1997

Appl. No.:

8/880225

Inventors:

David W. Berg - Plymouth MN

Assignee:

Tennant Company - Minneapolis MN

International Classification:

A47L 11204

US Classification:

15334

Abstract:

A surface maintenance machine for use in sweeping and collecting dust and debris from inside and outside areas has a frame and wheels for supporting the frame for movement along the surface to be cleaned. There is a debris hopper on the frame and a rotary sweeping brush on the frame mounted to direct dust and debris from sweeping a surface into the hopper. A vacuum fan is located on the frame and there is an air flow path on the frame from the hopper to the vacuum fan. A dust collection container in the form of a flexible bag is positioned within a vacuum chamber in said air flow path and is in a generally upright disposition. The dust collection container has an air flow entrance adjacent the upper end thereof. During operation of the sweeping brush, dust and debris are directed into the hopper, with the vacuum fan moving dust from the hopper along the air flow path to the dust collection upper air inlet with the debris remaining in the hopper.

US Patent:

41947576, Mar 25, 1980

Filed:

Oct 16, 1978

Appl. No.:

5/951392

Inventors:

James H. Lucas - Milwaukee WI
David A. Berg - Milwaukee WI

Assignee:

Allis-Chalmers Corporation - Milwaukee WI

International Classification:

B60D 114

US Classification:

280461A

Abstract:

An adjustable lift link on a three-point hitch having a self-locking handle and retainer for selectively adjusting and holding the adjustment of the lift link. A stop on the link selectively provides the float or fixed length positions of the link of the three-point hitch.

US Patent:

61172006, Sep 12, 2000

Filed:

Jul 9, 1998

Appl. No.:

9/112393

Inventors:

David W. Berg - Plymouth MN
Bruce F. Field - Golden Valley MN
Joseph L. Pouliot - Elk River MN

Assignee:

Tennant Company - Minneapolis MN

International Classification:

A47L 920
B01D 4604

US Classification:

55287

Abstract:

A mobile surface maintenance machine has a cleaning brush and a dust collection system mounted on the machine. The dust collection system includes a vacuum fan, a filter housing having an air inlet and a pleated filter element positioned within the housing with its upstream side being in communication with the housing air inlet. The filter housing has separate, side-by-side, chambers on the downstream side of the filter. There are electrically operated valves located in the filter housing on the downstream side of the filter element, with the valves being in communication with the vacuum fan. There is one valve controlling air flow from each chamber. The filter element is functionally divided into separate, but joined, pleated sections, with each section being aligned with one of the chambers. There is an electric actuator mounted on the downstream side of each pleated filter section and there is a pleat moving element associated with and movable by each electric actuator. The pleat moving elements each are in engagement with only the pleats in one filter section.

US Patent:

44666314, Aug 21, 1984

Filed:

Sep 27, 1982

Appl. No.:

6/424006

Inventors:

David A. Berg - Milwaukee WI

Assignee:

Allis-Chalmers Corporation - Milwaukee WI

International Classification:

F16C 1106

US Classification:

280415A

Abstract:

A ball joint assembly for a draft link of a three-point hitch on the tractor. The ball can be assembled through a slot in a side of the link and rotated in a spherical socket where it is retained by a retaining element.