Road structure – process – or apparatus – Apparatus – Screed or drag
Patent
1974-11-12
1976-05-18
Byers, Nile C.
Road structure, process, or apparatus
Apparatus
Screed or drag
E01C 1922
Patent
active
039573842
ABSTRACT:
It is known to utilize a screed extension apparatus along the front surface of a mold board in a machine for spreading pulverulent material such as a paving machine. Such a screed extension apparatus normally includes a strike-off plate and means for mounting and moving this plate between a retracted position generally in front of the mold board and an extended position in which the strike-off plate extends from an end of the mold board so as to serve as an extension of the mold board. Such a structure can be improved by utilizing two housings, the second of which fits around the first in such a manner that the second housing may be moved linearly with respect to the first but is restrained from any other type of relative movement with respect to the first housing. The first housing is secured in front of the front surface of the mold board well above the bottom of the mold board and adjacent to the end of the mold board. The second housing carries the strike-off plate. Preferably a hydraulic cylinder is located in the first housing and is operatively connected to the second for use in moving the second housing relative to the first housing.
REFERENCES:
patent: 2953977 (1960-09-01), Warren
patent: 3130654 (1964-04-01), Apel
patent: 3335646 (1967-08-01), Crayton
patent: 3373669 (1968-03-01), Schmitz
patent: 3557672 (1971-01-01), Schurtz
patent: 3572227 (1971-03-01), Poulsen
patent: 3680451 (1972-08-01), Birtchet
Lamb Ronald B.
Williamson David H.
Bower Industries, Inc.
Byers Nile C.
O'Brian Edward D.
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