Control device for the engine of an engine driven saw

US4079708A · kind A · utility

Assignee

• Andreas Stihl Maschinenfabrik

Inventors

• Dieter Wieland · Neckarrems, DE
• Klaus Hoppner · Erbach, DE

Key dates

• Filing date: Mar 2, 1976
• Grant date: Mar 21, 1978
• Expiry date: Mar 2, 1996

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M1/02
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A control device for the engine of an engine driven saw having a carburetor with a normally closed fuel control or throttle valve and a normally open starting or choke valve. The device includes a selector member which has a "stop" position in which the engine ignition is disabled and an "operating" position in which the throttle valve is freely adjustable. The selector member also has a "warm start" position and a "cold start" position with the throttle valve being held in a position of minimum opening thereby in each position while the starting valve is held closed by the selector member only in the "cold start" position of the selector member.