Road structure – process – or apparatus – Apparatus – Screed or drag
Patent
1978-02-13
1979-01-02
Byers, Jr., Nile C.
Road structure, process, or apparatus
Apparatus
Screed or drag
2421583, E01C 1922
Patent
active
041324927
ABSTRACT:
A self-propelled concrete screed machine is provided having a winch and cable propulsion system comprised of a pair of cable spools and two cables, one wound upon each spool, and a pair of level wind mechanisms providing a reciprocal guiding motion of the cables across the length of the spools, so that each cable will be received on its respective spool in a series of concentric layers comprised of multiple side by side wraps of the cable. A portable, easily disassembled, framework including: a main frame carrying the winch and cable system and its prime mover; a pair of outer frame members each carrying a cable guide pulley; and two pairs of screed board guide handles, one of which carries a remote prime mover control, are also provided. The concrete screed machine is guided across the concrete surface being screeded by an elongated guide shoe which slidingly engages a plurality of guide supports affixed to the surface upon which the concrete is being poured.
REFERENCES:
patent: 1230768 (1917-06-01), Parrish
patent: 1440606 (1923-01-01), Johnston
patent: 1591593 (1926-07-01), Weller
patent: 1833546 (1931-11-01), Wight
patent: 1875467 (1932-09-01), Knoerzer
patent: 2306671 (1942-12-01), Tamblyn
patent: 2510523 (1950-06-01), Schiavi
patent: 2599330 (1952-06-01), Jackson
patent: 3309066 (1967-03-01), Carlson
patent: 3412658 (1968-11-01), Griffin
patent: 3767312 (1973-10-01), Raymond
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