Power cutter with controller responsive to lubrication status

US8256396B2 · kind B2 · utility

Assignee

• BLACK & DECKER INC. · US

Inventors

• Wolfgang Emmerich · Hamm, DE
• Willi Strauss · Schenefeld, DE

Key dates

• Filing date: Jul 4, 2008
• Grant date: Sep 4, 2012
• Expiry date: Jun 26, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A power cutter including a housing; a two stroke internal combustion engine mounted within the housing; a throttle switch by which the engine can be accelerated when the engine is running; a support arm mounted on the housing and which projects forward of the housing. A blade mounting mechanism is rotatably mounted on the end of the support arm and is capable of being rotationally driven by the engine when the engine is running. A carburetor provides aerated fuel for the engine and an air intake provides air for the carburetor. An air filtration mechanism filters the air drawn in from the air intake for the carburetor. A fuel tank provides fuel to the carburetor. An exhaust is provided through which the exhaust gases generated by the operation of the engine are expelled from the engine. The power cutter also includes an engine controller that controls the operation of the engine; an oil tank that provides lubricating oil for the engine; an oil pump that pumps lubricating oil from the oil tank to mix it with fuel; and a sensing system that determines whether sufficient lubricating oil is being provided for mixing with the fuel in accordance with predetermined parameters. The sensing…