Patent ID: 8545964

Claim:
A shock and drainage pad in roll form, comprising: a continuous length of flexible shock-absorbing polymer foam sheet rolled into a roll, the foam sheet having a generally planar upper surface and a generally planar lower surface when the foam sheet is unrolled and laid flat on a planar horizontal surface, a thickness of the foam sheet being defined between the upper and lower surfaces, the thickness being from about 5 mm to about 50 mm, the foam sheet having a width from about 1200 mm to about 1828 mm; the foam sheet defining a plurality of grooves in the lower surface, the grooves consisting only of lengthwise grooves extending continuously along the length of the foam sheet and being spaced apart across the width of the foam sheet, each groove having a crest defining a maximum penetration of the groove through the thickness of the foam sheet; the foam sheet defining a plurality of rows of vertically extending holes extending from the upper surface toward the lower surface, each hole having an outer periphery defining a diameter of the hole, the holes in each row being spaced apart along the length of the foam sheet and being aligned with a respective one of the grooves such that the holes extend into the crest of the groove, wherein the holes have a diameter substantially exceeding an average cell size of the foam sheet; and the foam sheet further defining a plurality of slots extending entirely through the thickness of the foam sheet, the slots being arranged such that a plurality of slots radiate out from the outer periphery of each of at least some of the holes, each slot having a length dimension and a width dimension, the length of the slots being at least about five times the width of the slots.