Land vehicles – Wheeled – Attachment
Patent
1987-02-12
1988-06-07
Bertsch, Richard A.
Land vehicles
Wheeled
Attachment
52179, 280169, B60R 304
Patent
active
047491914
ABSTRACT:
An anti-slip step having a plate member providing a tread surface portion and having an integrally formed down-turned vertical edge extending along a side, the intersection between the tread surface portion and the vertical edge being a curved surface blending into both the tread surface portion and the vertical edge. A plurality of discrete raised tabs are integrally formed as a continuation of the vertical edge and project above the curved surface. A plurality of discrete vertical apertures are open through the plate and disposed in the tread surface portion adjoining the rear and sides of each of the raised tabs. The area of an aperture is substantially larger than the vertical surface area of the respective tabs.
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Gipson Carl L.
Pedersen Kjell
Townsend David H.
AuBuchon F. David
Bertsch Richard A.
Navistar International Transportation Corp.
Sullivan Dennis K.
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