E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
262/10.1
E21C 35/22 (2006.01)
Patent
CA 1155143
ABSTRACT OF THE DISCLOSURE For reducing the amount of water consumed, the supply of water to the cutting head of a cutting machine is released only when different operating conditions simultaneously occur. The process provides for the release of the supply of water to the cutting head only with the switching-on of rotational movement of the cutting head and to make the water supply available only when at least one further operating condition such as, for example, movement of the cutting arm or movement of the machine simultaneously occurs. The apparatus for effect- ing this process comprises a device for switching-on a water pump, said device being coupled with a device for switching-on the rotational drive of the cutting head. For this purpose, a series of control pistons are arranged within a common cylin- der, the working spaces of each individual control piston being connected via conduits with the working spaces of the associated hydraulic assemblies for the movement of the cutt- ing arm and, the machine. The control pistons are coupled one with the other in direction of the pressure supplied and biassed in opposite direction by a spring. Movement of one of the control pistons which control pistons can be moved in- dependently one from the other, together with the water pump being switched-on, this effects a release of supply of water to the cutting head.
367997
Droscher Erich
Schetina Otto
Wrulich Herwig
Zitz Alfred
Marks & Clerk
Voest - Alpine Aktiengesellschaft
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