Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1992-12-21
1994-07-12
Smith, Scott
Metal working
Method of mechanical manufacture
Assembling or joining
173 91, 173211, E21B 1102
Patent
active
053276361
ABSTRACT:
A reversible impact-operated boring tool and a method for reversing the direction of operation of the same rapidly and safely is disclosed. The tool according to the invention possesses a second supply line for supplying pressurized fluid to the tool. The second supply line provides pressurized fluid to a directional valve within the tool. The tool operates in the forward mode for burrowing into the soil when pressurized fluid is supplied to this directional valve. When the pressurized fluid supply is terminated and the fluid is exhausted from the valve, the tool operates in the reverse mode. The tool according to the invention can be reversed safely without any need for hose manipulation and without turning off the primary fluid supply line.
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Smith Scott
The Charles Machine Works, Inc.
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