Land vehicles – Wheeled – Coasters
Reexamination Certificate
1998-05-08
2001-02-06
Swann, J. J. (Department: 3611)
Land vehicles
Wheeled
Coasters
C280S610000, C428S537100
Reexamination Certificate
active
06182986
ABSTRACT:
BACKGROUND TO THE INVENTION
The current fundamental maneuver of skateboarding is the ollie. This maneuver is accomplished when the rider simultaneously jumps and kicks the tail of the board to the ground with his back foot, thus causing the board to “pop” off the ground. Once the rider has popped the board off the ground the maneuver is completed by leveling the board with the rider's front foot. This is the means by which the rider jumps with the board into the air.
SUMMARY OF INVENTION
An improved skateboard is provided for all uses of a skateboard and in particular for performing a fundamental maneuver referred to as an ollie. The improved skateboard has increased resiliency, strength and elasticity. The improvements involve the various arrangements of wood and non-wood laminates, or plies, all of which are thinner than {fraction (1/16)}″, and the minimum number of the total number of laminates is seven. It is therefore the primary objective of the present invention to provide a skateboard with increased resiliency, strength, and elasticity.
One of the objectives of this innovation consists of using individual plies thinner than {fraction (1/16)}″, which allows an increased number of plies to be used in the laminate, resulting in a minimization of structural imperfections in the laminate and a maximization of overall board strength.
Another of the objectives of this innovation is to increase the spring constant in the longitudinal direction with interply lamination of woven fiberglass for reinforcement, thus resulting in increased spring constant and overall strength in the longitudinal and latitudinal directions.
Yet another objective of this innovation is the direct application of Hooke's law wherein the placement of the non-wood materials, such as carbon fiber and/or fiberglass, constitutes a design feature that in the final laminate produces a continuous spring. This continuous spring has one center of flexure centered about the center of the board, or two centers of flexure centered about each truck (flexible axle). The method of construction relies on the separation of the spring's constituent parts: plies of wood and/or fiberglass.
REFERENCES:
patent: 3844576 (1974-10-01), Schultes
patent: 4412687 (1983-11-01), Andre
patent: 4523772 (1985-06-01), Arnsteiner
patent: 5005853 (1991-04-01), Lampl
patent: 5649717 (1997-07-01), Augustine et al.
patent: 5759664 (1998-06-01), Chisnell et al.
patent: 5803478 (1998-09-01), Gavalis
patent: 5855389 (1999-01-01), Andrus et al.
Craine Dean A.
Dunn David R.
Swann J. J.
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