Plank structure for boat dock and the like
AssigneeCTB, Inc.
InventorDennis G. Yoder
Life of this patent
Estimating the term…
Abstract
A plastic plank member, for use with a deck arrangement, having a rigid base portion and a tread portion attached thereto which are integrally extruded of suitable plastics. The rigid portion of the plank member is adapted to be secured to an underlying support structure. The tread portion is formed with protrusions projecting upwardly away from the tread and grooves formed therein. The characteristics of the tread result in a sufficiently high coefficient of friction to reduce the possibility of slipping on the plank member.
Claims13
A plastic plank member for a deck or the like integrally formed of a plastic material having a coefficient of friction less than approximately 0.5, said plank member comprising:
- a top portion formed of a first material and tread means formed of a second material integral with said top portion, said tread means having a coefficient of friction generally greater than 0.5, fluid drainage means for draining fluid from said tread means and from said top portion of said plank.
A plastic plank member for a deck or the like, said plank member integrally formed of a first plastic material and a second plastic material, said first and second plastic materials being co-extruded, said plank member comprising:
- a top portion formed of said first plastic material and tread means formed of said second plastic material integrally extruded with and attached to said top portion, said second material having a coefficient of friction greater than said first material and generally greater than 0.5, and fluid drainage means for draining fluid from said tread means and from said top portion of said plank.
A plastic plank member for a deck or the like, said plank member generally integrally formed of plastic having a coefficent of friction of generally less than 0.5, said plank member being integrally extruded with a relatively elastically deformable tread means having a coefficent of friction of generally greater than 0.5, and drainage means for draining fluid from said tread means and from said top portion of said plank.
Dependencies are inferred from the claim text.