Road structure – process – or apparatus – Apparatus – Means to agitate material
Patent
1981-04-06
1982-09-14
Byers, Jr., Nile C.
Road structure, process, or apparatus
Apparatus
Means to agitate material
404119, E01C 1940
Patent
active
043492959
ABSTRACT:
An improved frame construction for a portable, vibrating-type concrete screed incorporates a specially designed hollow ridge tube extending along the apex of an elongated open frame of triangular cross section and providing means for adjusting relative angular positions of adjoining screed units and for passage of air when the screed is air operated.
REFERENCES:
patent: 2094910 (1937-10-01), Baily
patent: 2890632 (1959-06-01), Madison
patent: 3164072 (1965-01-01), Blankenship
patent: 3435740 (1969-04-01), McGall
patent: 4030873 (1977-06-01), Morrison
patent: 4213749 (1980-07-01), Morrison
patent: 4249327 (1981-02-01), Allen
patent: 4253778 (1981-03-01), Morrison
patent: 4261694 (1981-04-01), Morrison
Byers Jr. Nile C.
Olive B. B.
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