Plastic article or earthenware shaping or treating: apparatus – Vibrating means including mechanical movement or power means
Patent
1979-04-26
1982-02-23
Lowe, James B.
Plastic article or earthenware shaping or treating: apparatus
Vibrating means including mechanical movement or power means
404119, 404120, E01C 1938
Patent
active
043167152
ABSTRACT:
A vibratory concrete screed includes a generally triangular, open support frame to which front and rear screed blades are coupled. Air vibrators are coupled at intervals along the front and rear screed blades to impart vibratory motion to the blades. First and second end brackets are coupled to the screed top pipe and to the front and rear screed blades and include first and second side members which define a plane oriented perpendicular to the front and rear screed blades. A vertically and horizontally adjustable extension bracket is coupled to the first and second side members of the end bracket of the screed and is maintained in a plane perpendicular to the plane defined by the first and second side members of the end bracket.
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"Adjustable Strikeboard Given Variable Curb Exposure", Concrete Highway Magazine, Jul.-Aug. 1921, vol. 5, No. 4, p. 94.
Allen Engineering Corporation
Lowe James B.
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