Valve cam mechanism for four-cycle engine
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United States of America Patent
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-
Mar 18, 2003
Grant Date -
Aug 30, 2001
app pub date -
Feb 5, 2001
filing date -
Feb 4, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A valve cam mechanism for a four-cycle engine includes an improved construction. The engine includes at least one camshaft having cam lobes to activate at least one of an intake valve and an exhaust valve. The camshaft defines an aperture next to at least one of the cam lobes. The aperture extends generally normal to an axis of the camshaft. A decompression mechanism is provided for manual starting of the engine. The decompression mechanism includes a shaft extending through the aperture. An actuator is affixed to the shaft for pivotal movement about an axis of the shaft. The actuator has a first section arranged to hold the intake or exhaust valve in an open position when the actuator exists in an initial position. A second section is arranged to initially retain the actuator in the initial position and to release the actuator from the initial position when the camshaft rotates. The shaft is rigidly supported by an inner surface of the aperture in part. A space is defined between the shaft and the inner surface of the aperture in the rest part.
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