Diaphragm carburetor

Details Diaphragm carburetor Diaphragm carburetor

2006-04-26

2008-11-25

Chiesa, Richard L (Department: 1797)

Gas and liquid contact apparatus

Fluid distribution

Pumping

C261S069100, C261SDIG068

Reexamination Certificate

active

07455283

ABSTRACT:
A diaphragm carburetor for an internal combustion engine of a hand-guided power tool has a carburetor housing having an intake passage section and at least one fuel opening that opens into the intake passage section. A control chamber is arranged in the carburetor housing and supplies fuel to the at least one fuel opening. A control diaphragm delimits the control chamber. A valve controls fuel supply to the control chamber, wherein a position of the valve depends on a deflection of the control diaphragm. A device that counteracts a hydrostatic pressure difference between the at least one fuel opening and the control chamber in at least one position of the diaphragm carburetor is provided.

REFERENCES:
patent: 2345168 (1944-03-01), Wirth et al.
patent: 2724584 (1955-11-01), Armstrong
patent: 3072390 (1963-01-01), Phillips
patent: 3085791 (1963-04-01), Phillips
patent: 3268216 (1966-08-01), Phillips
patent: 3330545 (1967-07-01), Donovan
patent: 4230646 (1980-10-01), Ghizzoni
patent: 4294779 (1981-10-01), Alape
patent: 4483302 (1984-11-01), Mannessen
patent: 4787356 (1988-11-01), Rosgen et al.
patent: 5503119 (1996-04-01), Glover
patent: 5843345 (1998-12-01), Guntly

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