Automatic drive hammer system

Details Automatic drive hammer system Automatic drive hammer system

1981-07-15

1983-09-20

Smith, James G.

Tool driving or impacting

Means to control advance and cyclically reciprocate a...

Relatively elevated guide engaging cable between drive and...

173 29, 173124, 73 84, B25D 900

Patent

active

044050208

ABSTRACT:
An automatic drive hammer system, particularly adapted to use in the Standard Penetration Test, is mounted on a drill rig in such a way that it can be swung and translated to an on-hole working position. A hammer reciprocating mechanism is so mounted that its weight is not borne entirely by the drill rod, the hammer is dropped free through an accurately predetermined height onto an anvil isolated from the reciprocating mechanism so that all of the energy from the falling hammer is transmitted to the drill rod, and the hammer will not be lifted and released if the anvil is not in place.

REFERENCES:
patent: 2599995 (1952-06-01), Hobson et al.
patent: 3205952 (1965-09-01), Sicotte
patent: 3216511 (1965-11-01), Ladd et al.
patent: 3369616 (1968-02-01), McGonigal et al.
patent: 3543868 (1970-12-01), Drake
patent: 3732935 (1973-05-01), Gibson

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