Railways: surface track – Electrical connections – Combined rail joint or support
Patent
1998-09-30
2000-10-10
Stormer, Russell D.
Railways: surface track
Electrical connections
Combined rail joint or support
E01B 2300
Patent
active
061292893
ABSTRACT:
A traction device for a wheeled vehicle arranged to be laid on the ground in engagement with a tread portion of a tire to provide a traction grip to the tire. The traction device includes a U-shaped frame and a pair of claws constructed at the ends of the U-shaped frame and arranged to engage into cavities between the tire treads by a lever action on the traction device. The traction device further includes a plurality of transverse braces extending between a pair of longitudinal bars of the U-shaped frame, each transverse brace having a pair of traction cleats extending downwardly to engage with the ground and to elevate the traction device from ground in some measure. One of the transverse braces is positioned at a region near a forward end of the U-shaped frame so that the corresponding pair of traction cleats maintain the device in a level attitude, prevent a lever action from being created, and prevent the U-shaped frame from tilting or projecting upwardly which may cause injury or property damage as the vehicle passes over the forward end of the device.
REFERENCES:
patent: 2619289 (1952-11-01), Plante
patent: 3878988 (1975-04-01), Blais
patent: 3997110 (1976-12-01), Aumont
patent: 4568020 (1986-02-01), Gallichan
patent: 5100054 (1992-03-01), Fickett et al.
C.R.M. Enterprises, Inc.
Stormer Russell D.
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