Internal-combustion engines – Intake manifold – For use with carburetor upstream of manifold
Reexamination Certificate
2005-03-22
2005-03-22
Dolinar, Andrew M. (Department: 3747)
Internal-combustion engines
Intake manifold
For use with carburetor upstream of manifold
C123S590000
Reexamination Certificate
active
06868813
ABSTRACT:
An elastic connecting piece (1) is mounted between a carburetor (4) and an inlet channel (3) of an internal combustion engine (2). The engine (2) is especially an engine of a portable handheld motor-driven work apparatus such as a motor-driven chain saw, cutoff machine or the like. The connecting piece (1) includes a peripherally extending expansion fold (5) arranged between its ends in order to compensate for changes in length. The expansion fold (5) subdivides the connecting piece (1) into a carburetor-end section (6) and into an engine-end section (7). The annular gap (28) of the expansion fold (5) can be bridged by a seal lip (8). The connecting piece (1) includes a peripherally extending seal seat (9) of axial length (g) in the region of the expansion fold (5). The seal lip (8) can be placed in seal-tight contact with the seal seat (9) and substantially closes the expansion fold (5) fluid tight to the interior space of the connecting piece (1).
REFERENCES:
patent: 4711225 (1987-12-01), Holderle et al.
patent: 5065708 (1991-11-01), Wehle et al.
patent: 5474039 (1995-12-01), Doragrip
patent: 6073609 (2000-06-01), Buswell et al.
Joos Michael
Leuze Stefan
Radtke Andreas
Zimmermann Helmut
Andreas Stihl AG & Co. KG
Dolinar Andrew M.
Harris Katrina B.
Ottesen Walter
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