Road structure – process – or apparatus – Apparatus – Material distribution means
Patent
1994-06-20
1995-10-10
Britts, Ramon S.
Road structure, process, or apparatus
Apparatus
Material distribution means
404118, 404132, E01C 1922
Patent
active
054565499
ABSTRACT:
A powered rotary screed has a plurality of interchangeable modules of different lengths so that the power screed can accommodate a range of job applications. Additionally, the rotary screed comprises a centrally located expansion member that can be adjusted to cause an upper ridge member of the rotary screed to expand outward, thus raising a medial portion of the roller screeds so that they may be adjusted to maintain horizontal alignment. The screed is propelled by two drive tubes that are supported by drive modules and powered by hydraulic motors. The screed further comprises a two-section strike tube which is likewise powered by a hydraulic motor. An operator rides in an operator's station and controls the speed and direction of the rotary screed.
REFERENCES:
patent: 4340351 (1982-07-01), Owens
patent: 4577994 (1986-03-01), Miller
patent: 4931008 (1990-06-01), Morrison
patent: 4964754 (1990-10-01), Garner et al.
patent: 5046889 (1991-09-01), Sterner, Jr.
"Razorback Screeds," 9-pg. brochure, Allen Engineering Corp., Paragould, Ark., 1992.
"Bunyan," 1-pg. brochure, Bunyan Industries, Salt Lake City, Utah, undated.
"There Are No Finer Finishers Available," M-B-W, Inc., Slinger, Wis., 1-pg. ad in Concrete Construction, 34:538, Jun. 1989.
Britts Ramon S.
Lisehora James A.
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