The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 2001
Filed:
Mar. 15, 1999
Göran Dahlberg, Gränna, SE;
Magnus Fröjd, Huskvarna, SE;
Niels Hartz, Huskvarna, SE;
Ulf Näslund, Huskvarna, SE;
Aktiebolaget Electrolux, Stockholm, SE;
Abstract
A drive unit (,) for a handheld working tool, such as a chain saw, trimmer or hedge trimmer, essentially comprising a housing part (,) with a fuel tank (,) and an engine unit (,) with a fuel supply unit (,) such as a carburetor (,), a muffler (,), and a crankcase scavenged combustion engine (,) with a cylinder (,), piston (,) and crankshaft. The engine (,) has at least one inlet port (,) located in the cylinder wall (,) of the engine and/or an adjacent part of the engine crankcase (,), and the engine's inlet duct (,) from the inlet port (,) up to the fuel supply unit (,) has a length longer than 1.8 times the engine cylinder stroke (,), preferably longer than 2.0 times the cylinder stroke (,).