Arrangement of an air filter and a membrane carburetor

US6293981A · kind A · utility

Assignee

• Andreas Shihl AG & Co. · DE

Inventors

• Hans Holderle · Freiberg, DE
• Stefan Kummermehr · Winnenden, DE
• Johannes Menzel · Oberhausen, DE
• Helmut Zimmermann · Winnenden, DE
• Bernd Knodler · Winnenden, DE
• Horst Denner · San Jose, US

Key dates

• Filing date: Apr 13, 2000
• Grant date: Sep 25, 2001
• Expiry date: Apr 13, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S55/28
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention is directed to an arrangement of an air filter (1) and a membrane carburetor (2). The membrane carburetor (2) has an intake channel section (3) configured in the carburetor housing (4) and fuel-conducting channels (6) open into the intake channel section (3). The channels (6) are supplied from a fuel-filled control chamber (7) which is configured in the carburetor housing (4). The control chamber (7) is partitioned from a compensation chamber (11) via a control membrane (10). The compensation chamber (11) communicates with the housing (14, 16) of the air filter (1) via a compensation channel (13) downstream of an air filter element (39). The air filter housing (14) engages over the membrane carburetor (2) essentially on the side of the compensation chamber (11) and the clean chamber (24) of the air filter housing (14) communicates with the intake channel section via a connecting stub (37) which lies approximately at right angles to the intake channel section (3). The connecting stub (37) is used as a connection between the clean chamber (24) of the air filter (1) and a flow space (26) mounted forward of the intake channel section (3) in order to ensure a reliable comp…