Work apparatus having one handle for one-handed operation

US5018492A · kind A · utility

Assignee

• Andreas Stihl · DE

Inventors

• Gunter Wolf · Eberdingen, DE
• Reinhold Fink · Pettenbach, AT

Key dates

• Filing date: Oct 22, 1990
• Grant date: May 28, 1991
• Expiry date: Oct 22, 2010

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B2075/025
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The invention is directed to a work apparatus such as a motor-driven chain saw or the like and is especially directed to a one-hand chain saw. The apparatus has a housing for an engine for driving the work tool and an air/fuel-mixture is metered to the engine. The chain saw includes one handle for carrying and guiding the apparatus with the handle including a hold handle portion aligned approximately in the longitudinal axis of the chain saw and disposed above the housing. The handle also includes a bail-type side handle portion arranged at an angle toward the forward end of the hold handle portion. The hold handle portion is widened transversely to the longitudinal axis at its rearward end to permit the one-hand chain saw to be reliably held and guided. The carburetor is mounted in the receiving chamber so that the housing of the work apparatus can be smaller and thereby enable the hold handle portion to be brought closer to the gravity center of the chain saw. The wall of the receiving chamber facing the hold handle portion is configured as a bearing surface for the heel of the hand of the operator.