Road structure – process – or apparatus – Apparatus – Screed or drag
Patent
1996-01-17
1997-12-30
Lisehora, James
Road structure, process, or apparatus
Apparatus
Screed or drag
404104, E01C 1922
Patent
active
057022020
ABSTRACT:
For changing the working width of a road finisher, its laying beam (10) is composed of a (central) main beam (13) and two shifting beams (14). In the retracted state, the shifting beams (14) must have only an overall width which is not greater than that of the main beam (13). Furthermore, the working width of the laying beam (10) may be increased by extending the shifting beams (14) to twice the width of the main beam (13). In this case, there is no longer any overlap between the main beam (13) and the shifting beams (14), but the transition of the main beam (13) to the shifting beams (14) causes unsightly imprints on the finished road surfacing. This problem is solved by providing a laying beam (10) which, by offset projections (20, 21) on the shifting beams (14), forms an overlap between marginal regions of the shifting beams (14) and the main beam (13) when the shifting beams (14) are fully extended. This avoids unsightly imprints on the finished road surfacing. The offset of the projections (20, 21) in relation to one another allows the shifting beams (14) nevertheless to be retracted to such an extent that the overall width of the two retracted shifting beams (14) is not greater than the width of the main beam (13).
REFERENCES:
patent: 4345852 (1982-08-01), Goto et al.
patent: 4379653 (1983-04-01), Brown
patent: 4502813 (1985-03-01), Hojberg
patent: 4678365 (1987-07-01), Ban et al.
Lisehora James
Svedala Strassenfertiger GmbH
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