Percussive implement of the rock breaker type

Details Percussive implement of the rock breaker type Percussive implement of the rock breaker type

2005-02-22

2005-02-22

Smith, Scott A. (Department: 3721)

Tool driving or impacting

Impacting devices

Hammer head constitutes piston of drive motor

C173S129000, C173S130000, C173S132000

Reexamination Certificate

active

06857482

ABSTRACT:
The invention concerns an apparatus comprising a body (2) wherein a piston (6) is mounted sliding alternately driven by an incompressible fluid under pressure, said body containing part of a tool (4) which is guided in translation in a wear sleeve (3), the end of the tool located inside the body being subjected to the repeated impacts of the piston (6), while the other end projects beyond the body and is designed to be supported on the rock or analogue to be destroyed, the tool being retained in the body by at least a transverse key (13). One of the keys (13) retaining the tool passes through aligned holes provided in the body (2), into the wear sleeve (3), and overlaps inside the inner cylindrical space of the sleeve, the tool (4) having a transverse groove (12) for the key (13) to pass through.

REFERENCES:
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patent: 5388842 (1995-02-01), Piras et al.
patent: 5820312 (1998-10-01), Stock et al.
patent: 5893419 (1999-04-01), Hodges
patent: 468737 (1937-07-01), None
patent: 969010 (1964-09-01), None
patent: 2 141 659 (1985-01-01), None

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