U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Bidirectional roadway for wheeled vehicles

Patent 5499888 Issued on March 19, 1996. Estimated Expiration Date: Icon_subject March 29, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

2975977

3547175

Tires for drive wheels of agricultural tractors or similar vehicles Patent #: 4446902
Issued on: 05/08/1984
Inventor: Madec ,   et al.

Inventor

Application

No. 413167 filed on 03/29/1995

US Classes:

404/19, Anti-slip surface152/209.11, For sidewall-running tires (e.g., unicycle, motorcycle, bicycle, etc.)152/209.17, Having isolated holes or suction cups152/209.28, Having directional two dimensional pattern (e.g., "v" shaped, etc.)152/209.7, Including foam section404/42Patterned

Examiners

Primary: Britts, Ramon S.
Assistant: Lisehora, James A.

Attorney, Agent or Firm

International Class

E01C 011/24

Abstract

A roadway for bicycle and other tired wheel vehicles formed of a plurality of end-to-end abutting tiles, preferably of a structural foam plastic such as polyethylene includes a generally rigid base having opposed top and bottom surfaces, with the top surface being flat and carrying integrally longitudinally and laterally spaced arcuate ridges. The arcuate ridges form alternating, laterally aligned rows of longitudinally spaced, oppositely facing arcuate ridges, with the arcuate ridges of a given row being offset laterally from corresponding arcuate ridges of adjacent longitudinally spaced rows by one half the length of an arcuate ridge. Further, the arcuate ridges of each lateral row are spaced from each other a distance such that the ends of the arcuate ridges of a given row lie within the concave curve of arcuate ridges of the adjacent, oppositely facing lateral row. As such, a bidirectional roadway is created, minimizing vehicle wheel vibration, permitting easy rolling of the vehicle wheels, while providing slip resistance to the vehicle wheels in all directions. Preferably, a narrow rib extends longitudinally of each arcuate ridge along the center thereof and drainage holes are preferably provided between the ends of the arcuate ridges of each row centered within the concave curve of the arcuate ridges of an adjacent facing row.

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