F - Mech Eng,Light,Heat,Weapons – 02 – N
Patent
F - Mech Eng,Light,Heat,Weapons
02
N
123/229
F02N 3/02 (2006.01)
Patent
CA 1250203
Abstract of the Disclosure A starter device is disclosed for an internal combustion engine of a motor-driven chain saw. The starter device includes a rotor which is secured on a bearing pin by means of a spring clip. The legs of this spring clip extend partially parallel to each other and define an end portion and a guiding portion adjacent to the bearing pin. The rotor has also a pawl pivotable about a pivot axis parallel to the axis of rotation of the rotor. When the internal combustion engine is started, the pawl engages teeth formed on an inner wall surface of a fan wheel. Between its pivot axis and its free end, the pawl has a pawl pin projecting over the pawl and guided in the guiding portion of the spring clip. In the direction of rotation of the fan wheel, the pawl pin comes into contact with one spring leg ahead of a plane connecting the axis of rotation of the rotor with the pivot axis of the pawl, whereby a force component directed in the rotational direction of the fan wheel acts on the spring clip loading the pawl pin in the opposite direction. In this way, the pawl is securely held in its stop position by the spring clip which prevents the pawl from inadvertently pivoting outwardly while the engine is running and engaging the flywheel teeth which could otherwise impair the functional safety of the device.
489191
Fetherstonhaugh & Co.
Stihl Andreas
LandOfFree
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