Road structure – process – or apparatus – Apparatus – Screed or drag
Patent
1987-01-22
1988-02-02
Novosad, Stephen J.
Road structure, process, or apparatus
Apparatus
Screed or drag
404114, E01C 1922
Patent
active
047226382
ABSTRACT:
A concrete screed comprising an elongate frame with a first longitudinally extending screed plate connected to a leading portion of the frame, and a second longitudinally extending screed plate connected to the frame rearwardly of the first screed plate. A plow body is mounted on the frame in close proximity to the first screed plate and presents discrete surface portions, comprising: (i) a first generally horizontal surface portion, extending forwardly from the vicinity of the first screed plate to a front leading edge and generally horizontally aligned with the first screed plate, and (ii) a second surface portion integrally joined to the front leading edge of the first surface portion and extending upwardly therefrom to an upper edge. Means are coupled to the frame for translating it along concrete to be screeded, whereby the first and second screed plates and plow body are brought into operative screeding engagement with the concrete.
Means for maintaining longitudinal alignment of the frame during the screeding operation are also disclosed.
REFERENCES:
patent: 2133862 (1938-10-01), Kerns
patent: 2219246 (1940-10-01), Jackson
patent: 2219247 (1940-10-01), Jackson
patent: 2248247 (1941-07-01), Nichols
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patent: 3515043 (1970-06-01), Austin
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patent: 3797953 (1974-03-01), Lindskog
patent: 4030873 (1977-06-01), Morrison
patent: 4213749 (1980-07-01), Morrison
patent: 4249327 (1981-02-01), Allen
patent: 4466757 (1984-08-01), Allen
Hultquist Steven J.
Letchford John F.
Novosad Stephen J.
Olive B. B.
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