Importance

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Abstract

A pneumatic portable impact tool includes a tubular housing, at least one handle pivotally supported on the housing, a hammer piston formed with an impact delivering neck portion, and an air distribution valve for directing air pressure alternatingly to opposite ends of the hammer piston so as to make the hammer piston reciprocate in the housing. The housing includes a rear section, an intermediate section, and a front section integrally formed in one piece. The rear section includes a socket portion for supporting the air distribution valve. The intermediate section includes a cylinder bore for sealingly guiding the hammer piston, and a damping sleeve mounted in the cylinder bore and arranged to be penetrated by the hammer piston neck portion, thereby forming a hammer piston damping air cushion chamber. And the front section includes a working implement receiving front opening and supports a movable latch arranged to releasably lock a working implement to the housing. The socket portion of the rear section and the front opening of the front section coaxially extend from the cylinder bore and each have a diameter exceeding a diameter of the cylinder bore, and a lock device is mounted on the rear section to axially retain the air distribution valve and to form a pivot support for the at least one handle.

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First Claim