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AssigneeHitachi Koki Co., Ltd.
InventorsYoshinori Ishizawa, Masanori Aoki, Yoshihiro Nakano
Estimating the term…
An air plug assembled into a pneumatically operated tool. The air plug is detachably connected to an air coupler which is connected to a compressed air source through a hose. When the air plug is disconnected from the air coupler, one end of the air plug is utilized as an oil supply portion. The air plug is formed with an air passage extending throughout a length of the air plug. The one end of the air plug is formed with an air inlet hole also serving as an oil supply hole for maintenance to the pneumatically operated tool. The oil supply hole has a conical shape increasing its inner diameter toward the one distal end. The conical configuration of the oil supply hole provides a maximum inner diameter at the open end which is not more than twice as large as a diameter of a tip end of a nozzle of a lubricator.
An air plug for pneumatically connecting a compressed air source to a body of a pneumatically operated tool, comprising a tubular body formed with an air passage extending throughout a length of the tubular body, the tubular body having one end provided with an end wall to be connected to the compressed air source and having another end portion in communication with the body of the pneumatically operated tool, the end wall being formed with an air inlet hole in communication with the air passage for introducing a compressed air into the air passage therethrough, the air inlet hole serving as an oil supply hole to allow a nozzle of a lubricator to be inserted therethrough, and the oil supply hole providing a cross-sectional area gradually increased toward the one end.
A pneumatically operated tool comprising:
Dependencies are inferred from the claim text.