Friction profile for the top of pool grate bars
An inventive top profile design of friction ridges on top of grate bars in a swimming pool. The profiles exhibit a multiple of right angled friction ridges which are stacked within each other in a direction which is perpendicular to the longitudinal direction of the grate bars. The right angled ridges resemble the well known chevron format. The right angled friction ridges increase the coefficient of friction to above 1.0 ASTM. The design of the friction ridges drains off water quickly and reduces the travel time of water the grate bars. The design also prevents stagnant water forming any mold formation. The tops of the friction ridges are rounded so that no sharp edges are present to enhance the comfort under the bare feet.
1 . A top profile design for grate bars in a swimming pool, said grate bars are supported by perpendicular support bars, said design exhibiting right angled friction ridges which are stacked relative to each other in a direction which is perpendicular to a longitudinal direction of the grate bars to thereby represent the form of a chevron.
2 . The profile design of claim 1 , wherein straight edges of all of said right angled friction ridges form an angle of 45 degrees relative to longitudinal edges of the grate bars.
3 . The profile design of claim 1 , wherein the coefficient of friction of the profile on top of said grate bars is above 1.0 ASTM.
4 . The profile design of claim 1 , wherein each top of said friction ridges is rounded.