Hand-held power tool with a combustion motor

US4350123A · kind A · utility

Assignee

• SOLO Kleinmotoren GmbH · DE

Inventors

• Gunter Kossek · Gechingen, DE
• Heinz Emmerich · Böblingen, DE

Key dates

• Filing date: Feb 2, 1981
• Grant date: Sep 21, 1982
• Expiry date: Feb 2, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T403/7064
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A hand-held power tool comprises a drive unit including a first housing, a combustion motor located in and fixed to said first housing and having an output shaft; and a work unit including a rotatable tool, an input shaft, a transmission between the input shaft and the tool for driving the latter and a second housing. A quick-connection arrangement is provided for releasably connecting the first to the second housing and a coupling arrangement coaxial with the connection arrangement serves to couple the output shaft with the input shaft. The quick-connecting arrangement comprises a centralizing ring coaxial with the output shaft and fixed to a stationary part of the combustion motor, a coupling ring turnably mounted on the centralizing ring, an annular coupling member fixed to the second housing, the coupling ring and the coupling member having cooperating cams having inclined faces, a spring connected to the coupling ring for turning the latter in a direction in which these inclined faces are tightly engaged to couple the coupling ring with the coupling member and therewith the first housing to the second housing, and a lever projecting radially from the coupling ring and being mo…