Road structure – process – or apparatus – Traffic director – Yielding
Patent
1977-06-10
1982-06-01
Byers, Jr., Nile C.
Road structure, process, or apparatus
Traffic director
Yielding
49131, E01F 1300
Patent
active
043325033
ABSTRACT:
A ramp is pivotably mounted in a road bed transverse to the flow of traffic. The ramp pivots between a first position raised above the surface of the road bed and a second position approximately flush with the surface of the road bed, but preferably slightly raised therefrom. A spring biases the ramp to its second position, and applies a return force to the ramp when it pivots from its second, i.e., intermediate, position to a third, i.e., depressed, position substantially flush with the surface of the road bed. Responsive to traffic approaching the ramp from one direction, the ramp pivots from its intermediate position into its depressed position as the traffic passes over the ramp. Responsive to traffic approaching the ramp from the opposite direction, the ramp pivots from its intermediate position into its raised position as the traffic passes over the ramp to signal travel in the wrong direction. Specifically, a platform is pivotably mounted in the road bed adjacent to and after the ramp in the right direction flow. The platform pivots between an upper position substantially flush with the surface of the road bed and a lower position below the surface of the road bed. A spring biases the platform to its upper position and applies a return force to the platform when it pivots from its upper position to its lower position. The ramp and the platform are interconnected to pivot the ramp to its raised position when the platform pivots to its lower position, and to lock the platform in its upper position while the ramp is in its depressed position. The apparatus is housed by a container having a flanged open top covered by the ramp and the platform. Seals prevent moisture from entering the top of the container.
REFERENCES:
patent: 1649877 (1927-11-01), Walston
patent: 2075892 (1937-04-01), Evans
patent: 2255911 (1941-09-01), Burnison
patent: 2403014 (1946-07-01), Nampa
patent: 2639450 (1953-05-01), Ramer
patent: 2643010 (1953-06-01), Hott
patent: 3390484 (1968-07-01), Gillespie
patent: 3748782 (1973-07-01), Reynolds
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