The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 18, 1983
Filed:
Dec. 17, 1980
Erich Droscher, Scheifling, AT;
Herwig Wrulich, Zeltweg, AT;
Alfred Zitz, Zeltweg, AT;
Otto Schetina, Zeltweg, AT;
Voest-Alpine Aktiengesellschaft, Vienna, AT;
Abstract
For reducing the amount of water consumed, supply of water to the cutting head of a cutting machine shall be given free only if different operating conditions are simultaneously occurring. The proposed process contemplates to provide the possibility to supply water to the cutting head only with the rotational movement of the cutting head being switched-on and to give free the water supply only if simultaneously at least one further operating condition such as, for example, a movement of the cutting arm or a movement of the machine is occurring. The apparatus for performing this process contemplates a device for switching-in a water pump, said device being coupled with a device for switching-in the rotational drive of the cutting head. For this purpose, a series of control pistons 2, 3, 4, 5 and 6 are arranged within a common cylinder 1, the working spaces of each individual control piston being connected via conduits 15, 16, 17, 18 and 19 with the working spaces of the associated hydraulic aggregates for the movement of the cutting arm and, respectively, the machine. The control pistons 2, 3, 4, 5 and 6 are coupled one with the other in direction of the pressure supplied and loaded in opposite direction to this direction by a spring 8. Shifting movement of one of the control pistons 2, 3, 4, 5 and 6, which control pistons can be shifted independently one from the other, thus, together with the water pump being switched on, effects release of supply of water to the cutting head (FIG. 1).