Fluid-actuated impact hammer

Details Fluid-actuated impact hammer Fluid-actuated impact hammer

1994-12-20

1996-05-28

Smith, Scott A.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

173206, 173207, 173212, B25D 904, E21C 320

Patent

active

055202543

ABSTRACT:
The impact hammer comprises a working piston (22) which is displaceable within a working cylinder (21) and controlled by a control means (40,41) in such a manner that it exerts impacts onto an anvil surface (23) of an adapter (24) which can be connected to the object to be advanced. When retracting the object, a return impact piston (51) exerts impacts onto the adapter (24) in opposite direction. Thereby, it is achieved that the object can be better released from the drill hole.

REFERENCES:
patent: 4006665 (1977-02-01), Klemm
patent: 4109734 (1978-08-01), Montabert
patent: 4468594 (1984-08-01), Jacquemet
patent: 4871035 (1989-10-01), Ekwall
patent: 5002136 (1991-03-01), Barthomeuf
patent: 5129466 (1992-07-01), Bartels et al.
patent: 5259464 (1993-11-01), Bartels et al.

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