Brakes – Vehicle – Ground-engaging
Patent
1984-06-22
1986-09-23
Stoner, Jr., Bruce H.
Brakes
Vehicle
Ground-engaging
280188, B60T 114
Patent
active
046130152
ABSTRACT:
One pair of emergency drag brake units are at each end of a vehicle. Each unit comprises a leg member with a serrate-toothed, ground-engageable foot telescopically movable in a support member carried by the frame. An elastic member is shown in one embodiment urging the leg downwardly to maintain pressure on the ground. Hydraulic jacks move the feet to braking positions engaging the ground while the axes of the leg members at each end of the vehicle are inclined toward the other end of the vehicle at an acute angle of 15.degree. or more relative to the vertical, thereby automatically enabling the so-inclined legs at the trailing end of a skidding vehicle to exert a greater frictional drag than the oppositely inclined legs at the leading end regardless of the vehicle's forwardly or rearwardly skidding orientation, and stopping it in a straight line. In one embodiment, the jacks swing the support members about pivots. In the other embodiment, the jacks extend the legs downwardly from fixed support members along inclined axes.
REFERENCES:
patent: 1495916 (1924-05-01), McNames
patent: 2049357 (1936-07-01), Daignault
patent: 2608274 (1952-08-01), Kromer
patent: 3042150 (1962-07-01), Lukawsky
patent: 3113641 (1963-12-01), Metailler
patent: 3799293 (1974-03-01), Howells et al.
patent: 3994369 (1976-11-01), Powaska
Diefendorf Richard R.
Stoner Jr. Bruce H.
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