WIRTGEN, a company involved in business activities in construction sector, has been recently granted a patent for invention titled “ROAD-MILLING MACHINE OR MACHINE FOR WORKING DEPOSITS”.
The patent has been issued as granted patent number 305841 filed as application number 1974/DEL/2008 having scope (abstract) of invention as:
“The invention relates to a road-milling machine or machine for working deposits, such as deposits of coal, ores, minerals, etc. by surface mining. The machine according to the invention has an arrangement 14 for detecting the path followed by a milled edge 13 of a milled strip, with the arrangement for detecting the path followed by the milled edge having means 14 for measuring the distance between at least one reference point 1 on the machine and the milled edge. The means 14 for detecting the path followed by the milled edge co-operate with the arrangement 6 for steering the track-laying units 3A, 3B in such a way that the machine follows the path followed by the milled edge. The distance between the at least one reference point on the machine and the milled edge can be set in such a way that milled strips situated alongside one another arc exactly aligned relative to one another.”
The primary independent claim (claim 1) of this patent states:
“Road-milling machine or machine for working deposits, having a chassis (1),
having running gear arranged on the chassis wliich has track-laying units (3A, 3B) which are at the front and rear in the direction of travel, having a milling arrangement (2) which is arranged between the front and rear track-laying units, the milling arrangement having a rotating milling drum (12) which is of a preset working width, a milled strip of a milled width corresponding to the working width of the milling drum thus being milled at the time of milling, having a steering arrangement (6) for steering at least one of the track-laying units, having an arrangement (14) for detecting the path followed by a preset line, which arrangement (14) co-operates with the steering arrangement (6) in such a way that the track-laying units (3A, 3B) are steered in such a way that the machine follows the path followed by the preset line, characterised in that the arrangement for detecting the path followed by a preset line takes the form of an arrangement (14) for detecting the path followed by a milled edge of a milled strip, the arrangement for detecting the path followed by the milling edge having means (14A, 14B) for measuring the distance between at least one reference point (1) on the machine and the milled edge, and in that the arrangement (14) for detecting the path followed by the milled edge co¬operates with the arrangement (6) for steering the track-laying units in such a way that the machine follows the path followed by the milled edge.”
The patent has been granted under International Patent Classification (IPC) E01C 23/00, which covers inventions related to:
“Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces”
This patent can be opposed under post-grant patent opposition within 12 months of the date of grant of this patent.
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