Hand power tool with a pneumatic striking mechanism
AssigneeRobert Bosch GmbH
InventorsFrank Mueller, Gerhard Meixner
Life of this patent
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Abstract
The striking mechanism has a hammer barrel (3), which has at least one control opening (23) through which, in an idle position, the air can escape from the hammer barrel (3), and which in a striking position is closed by a covering (25) that prevents the escape of air. To achieve the greatest possible sealing off of the at least one control opening (23) and thus high efficiency of the striking mechanism, the covering (25) is molded from an elastomer.
Claims7
A hand power tool—preferably a drill hammer or jackhammer—with a pneumatic striking mechanism that has a hammer barrel (3) which has at least one control opening (23), through which, in an idle position, air can escape from the hammer barrel (3) and which is closed, in a striking position, by a covering (25) preventing the escape of air, characterized in that the covering (25) comprises an elastomer.
The hand power tool of one of the foregoing claims, characterized in that the covering is a control sleeve (25) surrounding the hammer barrel (3).
Dependencies are inferred from the claim text.