Black Decker Inc.

Keith D Flaharty

Oleksiy P Sergyeyenko

Joseph B Cooper

Christopher Wade Shook

Wong Kun Ng

David Keith Wheeler

Brian E Poole

Joshua M Sheffer

Philip John Martinez

Steven J Phillips

Fugen Qin

Nathan J Cruise

Tarek Aydin

Keith E McQuaid

Lyle Matson

The battery-powered backpack blower includes a back support assembly including a back plate configured to permit a user to mount the blower to the user's back, and a volute assembly including a first volute portion and a second volute portion. The backpack blower further includes a housing assembly including a battery assembly and a motor assembly therein, the housing assembly is provided intermediate to the back assembly and the volute assembly.

Battery-powered backpack blower

A power tool with a chuck and a tool body having a housing, a motor received in the housing, a light array mounted to the housing, and an output spindle extending through the light array and which is rotationally driven by the motor. The chuck has a chuck body, a plurality of jaws, and an outer sleeve. A rear end of the chuck body is rotatably mounted on the output spindle. The chuck body has a plurality of jaw apertures and a plurality of light holes. The jaw apertures and the light holes extend through a front surface of the chuck body. Each of the jaws is received in a corresponding one of the jaw apertures. The outer sleeve is disposed about the jaws and the chuck body. Light emanating from the light array is transmitted through the light holes to illuminate a zone in front of the chuck body.

Illuminated power tool

A simplified control scheme is presented for use in a power tool. The power tool may be comprised of two or more lithium-ion battery cells connected in series and operable to drive the motor in the tool. A charging circuit is configured to receive a charging current from an AC adapter and to supply the charging current to the battery cells. A microcontroller monitors the voltage of the battery cells and terminates charging of the battery cells in accordance with the monitored voltages of the battery cells. The microcontroller does not receive power from the battery cells but is only powered by the AC adapter. Of note, each of the battery cells preferably employs an electrolyte composition comprised of a redox shuttle material. In combination with other tool components, the use of the redox shuttle material reduces or eliminates the need for expensive charge and discharge controls, thereby reducing the cost of the tool.

Charge control scheme for use in power tools

A rechargeable battery pack for a power tool can have a data terminal that provides a signal that is indicative of whether the voltage is below a threshold and can serve as both a pre-charge signal for a charger and as a stop-discharge signal for a power tool. A charger can include a power supply circuit and a voltage detection circuit. A charger control module can receive a signal indicative of the voltage of the battery pack and determine a pre-charge time based on the voltage and can monitor a change in the voltage of the battery pack during the pre-charge operation and stop the pre-charge operation based on the change in voltage and the time period.

Signal for pre-charge selection in lithium charging and discharge control/pre-charge function

Growing community of inventors

Wrightsville, PA, United States of America

Keith D Flaharty