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Class Information
Number: 173/125
Name: Tool driving or impacting > Impacting devices (e.g., hammers) > Hammer head constitutes or fixed to drive motor cylinder
Description: Apparatus in which the mass of material which forms the hammer head includes an internal chamber which receives the piston of a motor, said internal chamber being adapted to receive motive material to cause the mass of material to move relative to the piston and deliver a blow.

Patents under this class:

Patent Number Title Of Patent Date Issued
8302707 Down-the-hole drill reverse exhaust system Nov. 6, 2012
8240682 Jackhammer trolley Aug. 14, 2012
7182149 Pneumatic wrench having reinforced strength Feb. 27, 2007
4749050 Impact tool for tunneling Jun. 7, 1988
4645016 Resonant pile driving system Feb. 24, 1987
4505340 Hydropneumatic percussive tool Mar. 19, 1985
4483402 Paving breaker Nov. 20, 1984
4479551 Actuator for a hydraulic impact device Oct. 30, 1984
4144941 Directional impact tool for tunneling Mar. 20, 1979
4102408 Pile driving device Jul. 25, 1978
4075858 Hydraulic pile driving apparatus and method Feb. 28, 1978
3939922 Hydraulic hammer assembly Feb. 24, 1976

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