| 摘要 |
<p>PURPOSE:To provide an oil pump of a chain saw which can prevent a power loss or a noise from being generated by obstructing metallic powder or dirt from being entered the inside of an oil pump by a backflow of oil, improves durability of the oil pump, has advantage from an economically point of view also and does not lower operation efficiency. CONSTITUTION:In a chain saw provided with an oil pump 1 which makes lubrication oil of a saw blade chain discharge through an opening groove 44 of a discharge pipe 40, it is comprised by providing back flow preventive walls 45, 45,... in the direction interrupting a flow of the oil from the bottom part 44a of the opening groove 44.</p> |
