Brakes – Vehicle – Wheel and ground
Patent
1980-04-25
1982-04-20
Halvosa, George E. A.
Brakes
Vehicle
Wheel and ground
B60T 100
Patent
active
043254659
ABSTRACT:
An auxiliary braking device for bringing a highway tractor-trailer vehicle or the like to a sudden safe stop is provided. The device has an elongated metal plate member covered with a replaceable non-adherent elastomeric sheet having a surface of high coefficient of friction bolted to the plate member to form a drag shoe. The drag shoe is supported on the frame of the trailer transversely across the trailer in front of the rear wheels by an assembly of pivotally connected metal bars for folding the assembly to form a folded stored configuration below the frame above the road surface and for permitting the assembly to unfold and drop the drag shoe to the road surface where it is rolled on by rear wheels of the trailer upon activation of the support assembly by the operator of the moving vehicle. The folded drag shoe supporting assembly not only drops the drag shoe to the road surface when it is released but also guides the drag shoe into the path of the rear wheels. A winch and locking device are provided for lifting the drag shoe to its stored position and holding it in that position.
REFERENCES:
patent: 294994 (1884-03-01), Hacklander
patent: 850302 (1907-04-01), Greaser et al.
patent: 1840666 (1932-01-01), Grundon
patent: 2036910 (1936-04-01), Balensiefer
patent: 2143553 (1939-01-01), Hamaguchi
patent: 2164834 (1939-07-01), Owen
patent: 2483048 (1949-09-01), Hergner
patent: 2730196 (1956-01-01), Besoyga
patent: 2960191 (1960-11-01), Roberts
patent: 3722630 (1973-03-01), Wakabayashi
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