Robert D Pjevach

6616149, Sep 9, 2003

Mar 19, 2002

10/101276

Robert Pjevach - Lindenhurst IL
Brady Groth - Evanston IL

S-B Power Tool Corporation - Broadview IL

B23B 31107

279 75, 279 74, 279 82, 279905

The quick-release chuck for a rotary power tool is provided for holding a tool bit. The chuck includes a barrel having an axial bore to receive the tool bit and an axially movable sleeve operable to position a locking member to selectively lock or release the tool bit. A proximal end of the chuck near the housing of the power tool includes a low-profile collar which holds a spring in compression against the sleeve, biasing the sleeve in a distal, locked position. The components of the chuck may advantageously be assembled in a stacked manner. The low-profile collar permits the chuck to occupy a minimal length and to be positioned with a minimal separation from the housing of the power tool for enhanced safety.

20210116911, Apr 22, 2021

Nov 29, 2017

16/464426

- Wauwatosa WI, US
Robert PJEVACH - Wauwatosa WI, US

BRIGGS & STRATTON CORPORATION - Wauwatosa WI

G05D 1/00
A01D 34/00
A01D 34/78
A01D 69/02
G05D 1/02
B60L 53/80
B60L 53/30
H01M 10/0525
H01M 50/204
H01M 50/247
H01M 50/249
H01M 50/244
H01M 10/46

A robotic lawn mower includes a first wheel driven by a first electric wheel motor, a second wheel driven by a second electric wheel motor, a cutting implement driven by an electric cutting implement motor, a power system for powering the electric wheel motors and the electric cutting implement motor, and a controller configured to control operation of the electric wheel motors and the electric cutting implement motor to autonomously mow a yard. The power system includes multiple removable rechargeable battery modules and multiple receptacles, each receptacle configured to receive one of the battery modules.