Portable percussive tools with fluid-pressure drive, , e.g. having several percussive tool bits operated simultaneously

Child Classifications

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• B25D 9/005
• B25D 9/02 of the tool-carrier piston type, i.e. in which the tool is connected to an impulse member
• B25D 9/04 of the hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
• B25D 9/06 Means for driving the impulse member
• B25D 9/14 Control devices for the reciprocating piston