Snap-on Tools Corporation

Raymond R Zuzinec

Donald W Doman

Steven R Wente

Larry D Pacetti

Jack A Parise

William T Pagac

Roy B Bendickson

Steven E Michalski

James W Nelson

David R Ellingen

Mark S Bakula

Gerald R Bakula

Gene P Hopp

Michael L Foster

Thomas J Christensen

Keith R Malek

Engine analyzer

Timing light

A MacPherson strut spring compressor has a drive mechanism to move a strut clamp assembly toward and away from the front of the frame. Upper and lower positioning assemblies are vertically movable with respect to the frame to accommodate MacPherson struts of different sizes and spring offsets, with the upper positioning assembly being vertically adjustable independently of the lower positioning assembly and the lower positioning assembly being vertically adjustable with respect to frame. There is also disclosed locking mechanism for each of the positioning assemblies to retain the MacPherson strut in place during operation of the compressor.

MacPherson spring compressor

Control mechanism for a pneumatic hand tool which provides improved performance, speed regulation and control of the tool in air pressure ranges up to at least 116 pounds per square inch gauge (psig). A pneumatic hand tool embodying subject control mechanism includes a cylinder having an implement, such as a chisel, secured thereto and a reciprocating piston in the cylinder, the piston adapted to be driven by pressurized air into impact engagement with the front head of the cylinder, and returned to the rear cylinder end without impact. The control mechanism comprises an adjustable control valve which meters the volume of incoming pressurized air to that amount which produces desired tool operation, and an improved ball valve between the control valve and the cylinder. The control valve includes a radially movable spring-biased valve pin which cooperates with a valve seat, and a rotatable control ring in effective relation with the valve pin. The control ring has an internal spiral cam surface extending through about 90.degree. adapted to move the valve pin from a radially outward fully opened position to a radially inward closed position where the valve pin firmly engages the valve seat. Intermediate settings of the control ring provide intermediate valve actions. The internal cam surface has a scallop configuration providing discrete valve pin detent positions between closed and fully opened positions.

Control mechanism for a pneumatic tool

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Kenosha, WI, United States of America

Raymond R Zuzinec