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US 7,273,159 B2Granted
Cordless power tool system with improved power output
AssigneeBlack & Decker Inc.
InventorDaniele C. Brotto
Life of this patent
Estimating the term…
Abstract
An ergonomically efficient cordless power tool system having desired power-to-weight ratios may be configured by reducing weight in one or more constituent weight groups of a given cordless power tool system, while maintaining or improving the total power output of the tool system. An example cordless power tool system may be configured to output a maximum power of at least 475 watts, and have a maximum power output to weight ratio of at least 70 watts per pound (W/lb).
Claims27
A hand-held cordless power tool system, comprising:
- a tool housing,
- a motor assembly,
- a transmission/gear assembly, and
- a removable battery pack attached to the tool housing, the system configured to output 475 watts or greater and having a power output to weight ratio of 70 watts per pound (W/lb) or greater.
1 more element
A cordless power tool system, comprising:
- a plurality of hand-held cordless power tools, each tool having a tool housing, motor assembly, transmission/gear assembly, and removable battery pack, the battery pack containing a plurality of lithium ion cells configured to provide a nominal output voltage of 18 volts or greater to a DC motor of the motor assembly,
- wherein each tool of the system is configured to output 475 watts or greater and has a power output to weight ratio of 70 watts per pound (W/lb) or greater.
Dependencies are inferred from the claim text.