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Title:
SPEED CONTROLLER FOR FLYWHEEL OPERATED HAND TOOL
Document Type and Number:
WIPO Patent Application WO2002051592
Kind Code:
A8
Abstract:
A speed controller operates a DC-powered fastener drive assembly to efficiently drive fasteners from a DC power supply (22), thereby achieving a fully portable hand tool. In particular, the speed controller accelerates a flywheel (28) with a DC motor to a target speed appropriate for the type of fastener and user selection. Thereafter, the speed controller causes the kinetic energy from the flywheel (28) to be imparted to a linearly moving fastener driver. The speed controller is responsive to the rotational speed of the flywheel (28) to ensure a consistent depth of drive and to actuate a clutch for an appropriate amount of time to couple the flywheel (28) to the fastener driver. Thereby, consistent drives are achievement across a range of operating conditions (e.g., battery state of charge, type of fastener, mechanical tolerances and wear, motor performance, etc.).

Inventors:
ADAMS SHANE
Application Number:
US0149883W
Publication Date:
April 10, 2003
Filing Date:
December 21, 2001
Export Citation:
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Assignee:
SENCO PRODUCTS (US)
International Classes:
B25C1/00; B25C1/06; B25C5/15; H02P1/18; H02P3/08; H02P7/29; (IPC1-7): B25C1/06
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