Road structure – process – or apparatus – Road chair per se
Patent
1987-09-02
1988-07-12
Suchfield, George A.
Road structure, process, or apparatus
Road chair per se
52689, E01C 1118
Patent
active
047566418
ABSTRACT:
An improved system is provided for elevating and supporting reinforcement rods above an earthen bed upon which concrete is poured. A flat, disk-shaped sand plate is disposed in contact with the earthen bed and has a plurality of channels adapted to receive pedestal feet extending upwardly from its top surface and radially from its center toward the periphery thereof. The height of the channel walls is greater above the periphery of the base than above the center of the base and the interior surfaces of the channel walls converge from the periphery toward the center and from the tops of the walls toward the top surface of the sand plate. A pedestal is disposed atop the sand plate with feet wedged into the pedestal foot channels. The configuration of the pedestal foot channels allows the sand plate to accommodate pedestals of a wide variety of sizes. The lowermost portions of the outer edges of the pedestal legs are vertically oriented parallel to each other and perpendicular to the sand plate to provide greater stability. The pedestal legs may be joined together by laterally oriented stabilizing rings or provided with reinforcing gussets.
REFERENCES:
patent: 1289688 (1918-12-01), Davis
patent: 1672852 (1928-06-01), Roughan
patent: 1809870 (1931-06-01), Smith
patent: 1936536 (1933-11-01), Bates
patent: 3693310 (1972-09-01), Middleton
patent: 4060954 (1977-12-01), Liuzza
patent: 4080770 (1978-03-01), Vigh
patent: 4655023 (1987-04-01), Yung
patent: 4682461 (1987-07-01), Sizemore
Letchford John F.
Suchfield George A.
Thomas Charles H.
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