Tool driving or impacting – Impacting devices – Selective axial direction of impact
Patent
1992-03-23
1993-10-05
Smith, Scott A.
Tool driving or impacting
Impacting devices
Selective axial direction of impact
173128, 173135, 175 19, 175296, 91234, E21B 706
Patent
active
052496341
ABSTRACT:
An impact borer having a shell and an air drive within the shell. The air drive includes a ram for reciprocation within the shell and a manifold joined to the shell. The manifold defining an inlet passage delivering air to the air drive and an outlet passage exhausting air from the air drive, and a duplicate passage interconnecting the inlet and outlet passages within the manifold.
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patent: 5050686 (1991-09-01), Jenne
patent: 5074364 (1991-12-01), Hesse
Bueter John C.
Chandler Martin D.
Fields Randall T.
Laffkas Harry P.
Neuls Frederick W.
Industrial Engineering, Inc.
Smith Scott A.
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