Motor control of a drain cleaning machine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11396034
APP PUB NO 20210229140A1
SERIAL NO

17053004

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A drain cleaning machine includes a brushless direct current (DC) motor configured to rotate a snake about the snake axis. An electronic processor is configured to control power switching elements to drive the brushless DC motor. In a first operating range when a load experienced by the brushless DC motor is less than or equal to a predetermined load, the electronic processor is configured to control the power switching elements to drive the brushless DC motor at an approximately constant speed regardless of the load experienced by the brushless DC motor. In a second operating range when the load experienced by the brushless DC motor is greater than the predetermined load, the electronic processor is configured to control the power switching elements to drive the brushless DC motor at a decreasing speed as the load experienced by the brushless DC motor increases.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
MILWAUKEE ELECTRIC TOOL CORPORATION13135 WEST LISBON ROAD BROOKFIELD WI 53005

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Rose, David Pewaukee, US 117 1472
Turner, Christopher J Lannon, US 80 544

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