Lubricating-oil pump arrangement for a motor-driven apparatus

US4644658A · kind A · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• Hans Dolata · Waiblingen, DE
• Reinhold Fink · Pettenbach, AT
• Gerd Itzrodt · Stuttgart, DE
• Adam Kelbert · Winnenden, DE
• Siegfried Ryssel · Steinheim an der Murr, DE
• Anton Wehle · Fellbach, DE
• Dieter Wieland · Neckarrems, DE
• Gerhard Zerrer · Bad Marienberg, DE

Key dates

• Filing date: Dec 11, 1984
• Grant date: Feb 24, 1987
• Expiry date: Dec 11, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/263
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The invention is directed to a motor-driven apparatus such as a motor-driven chain saw or the like. It includes a lubricating-oil pump and an oil supply for a work tool and is equipped with a device for interrupting the supply of oil to the tool. This facilitates use of the chain saw apparatus with an accessory attachment work tool such as a hedge trimmer, drilling tool or the like for which a flow of lubricating oil is unnecessary.