Nitro Nobel Ab

Bengt Gunnar Egerstrom

Bror Lennart Sternhoff

The invention relates to a hose feeding winch intended for use in charging drill-holes with pulverulent or pumpable explosives through a hose inserted into each individual drill-hole. The winch comprises a drum rotatable about a central shaft, a drum cage enclosing said drum and rotatable about said central shaft, and a cradle supporting the central shaft and rotatable about a central axis on the platform of the truck. The drum has means forming a channel or path for the charging hose to be wound and unwound thereon in a single layer, and without displacement by sliding movement in radial or peripheral direction on the surface of the drum. The cradle carries an extensible unit adapted to be elevated relative to the cradle, and comprising two parts longitudinally slidable the one within the other, and a nose device swingably attached to the discharge end of the extension unit, and equipped with means for guiding the hose from the drum and along the extension unit, and means for aligning the front end of the hose with the axis of the drill-hole to be charged with explosive. The truck carries explosives that are fed to the charging hose. By rotation of the drum the hose is fed through the extension unit and into the drill-hole. Two power control pulpits are arranged on the truck to be accessible to an operator standing behind the truck.

Hose feeding winch

The apparatus includes two clamping devices mounted for vertical reciprocation one above the other, and having registering central apertures through which a flexible tube is adapted to be advanced. Each clamp contains a flexible sleeve disposed to surround the tube and selectively to be pressed into gripping engagement with it by means of a fluid pressure medium. This medium is also used to reciprocate the clamps alternately toward and away from each other, with only one clamp at a time being actuated so that the tube is advanced (e.g. fed upwardly) first by one and the other of the clamps.

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Danderyd, Sweden

Bengt Gunnar Egerstrom