Traction device

Railways: surface track – Electrical connections – Combined rail joint or support

Patent

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Details

E01B 2300

Patent

active

042302692

ABSTRACT:
The traction device is adapted to be placed under the slipping wheel of a vehicle which is disabled for lack of traction as a result of the slipping wheel being unable to develop any driving torque on top of snow, ice, mud or other slippery surface. Generally, the traction device possesses a body having rectangular shape and provided with a narrow elongated tongue to facilitate the insertion of the device underneath the slipping wheel. The device is provided with protrusions randomly disposed over the body so as to improve frictional engagement between the device and the slippery surface of the road. Additionally, the leading edge of the tongue is provided with protuberances which are adapted to engage with the surface of the slipping wheel to assist in the engagement of the device with the slipping wheel. The device is manufactured from a one-piece flat sheet of expanded metal having a plurality of elongated hexagonally-shaped interstices interconnected by bridges having slanting surfaces having sharp edges which are directed into the surfaces of both the slipping wheel and the road so as to oppose the movement of the traction device with respect to the wheel and the road.

REFERENCES:
patent: 1500249 (1924-07-01), McCracken et al.
patent: 1863316 (1932-06-01), Webster, Jr.
patent: 2443319 (1948-06-01), Mack
patent: 2486911 (1949-11-01), Becker
patent: 2677502 (1954-05-01), Denker et al.
patent: 3025002 (1962-03-01), Kunz
patent: 3395862 (1968-08-01), Lundberg
patent: 3786989 (1974-01-01), Haynes

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