Bit holder equipped with a spraying device

Patent · Tue Sep 24 04:00:00 EDT 1985

OSTI ID:6239569

Zitz, A; Maier, W; Schetina, O; Wrulich, H

A bit holder equipped with a spraying device, comprising a receiving bore in which the bit shaft is supported, for limited axial shifting movement and optionally for being rotated, shifting movement of the bit shaft in direction of the cutting pressure being limited by abutment and the bit shaft being loaded by a return force in opposite direction to the cutting pressure and a valve for the supply water to the bit or to the working or drift face during cutting operation being arranged within the bit holder and being opened under the action of the cutting pressure by the axial shifting movement of the bit shaft. The valve housing is inserted into the receiving bore. The rear end of the bit shaft acts directly on the shaft of the valve cone. Within the mantle of the receiving bore and in front of the valve housing there are provided passages through which contaminations entering into the receiving bore along the bit shaft can be discharged in outward direction before they can arrive at the valve seat. The shaft of the valve cone is preferably guided within the valve housing, so that contaminations are rinsed in outward direction through the passages by the leakage water flowing therethrough.

• Assignee: Voest-Alpine Aktiengesellschaft (Austria)
• Patent Number(s): US 4542942
• OSTI ID: 6239569
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
DESIGN
DRILL BITS
DRILLING EQUIPMENT
EQUIPMENT
MECHANICAL STRUCTURES
SUPPORTS