Percussion boring machine

Details Percussion boring machine Percussion boring machine

1993-09-17

1996-09-24

Smith, Scott A.

Tool driving or impacting

Impacting devices

Selective axial direction of impact

1731621, 173211, B25D 1724

Patent

active

055581676

ABSTRACT:
A percussion boring machine having an impact piston axially movable in a housing, a control pipe connected to a compressed air hose and an elastic separator fitted between the housing and the control pipe and held under axial compression, whereby assembly of the separator is simplified. In addition the housing, control pipe and compressed air hose suffer less damage, and the control pipe can be assembled and disassembled more easily.

REFERENCES:
patent: 1248481 (1917-12-01), Greve
patent: 1554985 (1925-09-01), Bayles
patent: 3756328 (1973-09-01), Sudnishnikov et al.
patent: 4427078 (1984-01-01), Wolters et al.
patent: 4809789 (1989-03-01), MacFarlane
patent: 5074364 (1991-12-01), Hesse

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