The Stanley Works

Other

Stanley Black Decker, Inc.

James F Steverding

Duane R Bookshar

Glen A Pankey

Joseph Rushanan

Michael Juliano

A power tool system includes a two-handed power tool having first and second start actuators, one for each hand of an operator. A controller prevents the power tool from initiating an operating cycle unless both actuators are turned ON to reduce the possibility of the operator's hands being disposed in a hazardous position during operation of the power tool. To discourage manual override of the dual-start-switch system, the controller prevents the power tool from initiating an additional operating cycle until both actuators have been switched OFF and then ON again. The second actuator includes a tubular sleeve that extends over part of the power tool to allow the sleeve to slide axially relative to the power tool between ON and OFF positions. Axial movement of the sleeve from its OFF position to its ON position turns ON the second start actuator.

Power tool with improved start actuator

The present application relates to a pneumatic tool for applying torque to fasteners and a system incorporating such a tool.

Pneumatic tool and system for applying torque to fasteners

A shut-off valve 50 is disclosed including annular grooves 54 and a valve sleeve 26 including openings 36 which are configured and located relative to each other to define an orifice of variable flow area for supplying fluid from supply passage 16s to motor 16m, the variable orifice having less than maximum flow area when valve 50 is in a normally open position and the variable orifice expanding to maximum flow area during a portion of the travel of valve 50 from the normally open position to a shut-off position.

Shut-off valve having variable input

A positioning device having a chamber having a chamber exhaust valve in a first end and a chamber fluid inlet in a second end; a piston disposed in a chamber between the first end and the second end, the piston being slidable in the valve chamber between a first position toward the first end and a second position toward the second end; the fluid communication opening having a smaller cross-section area than the chamber exhaust valve; and a piston biasing spring urging the piston toward the chamber second end and away from the chamber first end, the piston biasing spring responsive to a fluid pressure differential between the first and second chamber ends above and below a predetermined level to move the piston into the first and second positions, respectively. Also, a power tool having a housing including a fluid supply inlet; a fluid operated motor assembly mounted in the housing, the motor assembly including a motor fluid inlet; a valve connecting the fluid supply inlet and the motor fluid inlet; the valve being operable between a first position permitting fluid communication between the fluid supply inlet and the motor fluid inlet and a second position restricting fluid communication between the fluid supply inlet and the motor fluid inlet; and a positioning device operatively connected to the valve, the positioning device having first and second positions corresponding to the valve first and second positions, respectively.

Growing community of inventors

Mentor, OH, United States of America

James F Steverding