Patent · US Expired

Compact four-stroke combustion engine, especially for the use in a portable working device

US6659064B1 · kind B1 · utility

2Cited by

2References

6Claims

0Family size

Assignee

DOLMAR GmbH · DE

Inventors

Rainer Massmann · Bonn, DE
Bernhard Auler · Hamburg, DE
Wolf Burger · Eppelheim, DE
Eberhard Witzgall · Mühlacker, DE

Key dates

Filing date	Apr 17, 2002
Grant date	Dec 9, 2003
Priority date	—
Expiry date	Apr 17, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01M3/00
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In order to create a compact four-cycle internal combustion engine with mixture lubrication comprising a cylinder which is closed on top by a cylinder head and which changes below into a crankcase, in the cylinder a piston moving up and down, in the cylinder head an intake port with an admission valve and an exhaust conduit with an exhaust valve, a carburetor for forming an oil-fuel-air mixture lubricating the engine, as well as means by which a mixture is transported within each engine cycle from the carburetor into the crank chamber closed by the crankcase and from the crank chamber into the intake port, engine which is constructed in a simple way and which is characterized by a good charging behavior, it is proposed that the carburetor is connected outside the crank chamber with the intake port.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.