Percussion tool and cartridge-type oil tank therefor
AssigneeShibaura Engineering Works Co., Ltd.
InventorsTadashi Tamai, Takashi Kojima
Life of this patent
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Abstract
A pneumatic hammer, hammer drill or like percussion tool incorporating a cartridge-type oil tank detachably installed in the main body of the tool. The oil tank is made of transparent or semitransparent material and held from outside by a holding plate formed with at least one slit, permitting the user to check the tank from outside for an oil consumption. The oil tank is supported on a seat plate which is detachably mounted on the tool main body and which, when removed, enables the user to inspect or repair the interior with ease.
Claims7
A percussion tool comprising a tool main body holding at its forward end a tool bit which is projectable and retractable, a slidable striker housed within said tool main body for beating the inner end of said tool bit, said striker being integral with a cylinder having a piston fitting therein for giving an increased internal pressure, and crank means connected to said piston and turnable by drive means, wherein said crank means, when turned, brings said piston into reciprocation thereby repeatedly varying the pneumatic pressure within said cylinder to cause said striker to follow the motion of said piston to repeatedly beat the inner end of said tool bit, said percussion tool further characterized in that an oil tank of the cartridge type is detachably installed in the main body of the tool, and an oil absorbent wick extends from said oil tank and is held in contact with said crank.
Dependencies are inferred from the claim text.