Patent ID: 7931283

Claim:
An in-line skate frame assembly, comprising: a rigid frame for attachment to the sole of a shoe or boot, the frame having an upper portion, a pair of spaced side walls extending downwardly from the upper portion, and opposite ends, each side wall having a recessed region; the side walls of the frame having at least two first and second pairs of aligned wheel axle openings which receive wheel axles of first and second in-line skate wheels between the side walls; the upper portion of the frame having at least two spaced fastener openings; and an elongate H-block grinding insert separate from the frame which engages over the recessed region of each side wall and extends between the frame side walls, the grinding insert having a length greater than half the length of the frame and being centrally located along the length of the frame with opposite ends of the grinding insert terminating short of the respective opposite ends of the frame; the insert having spaced side walls, a lower, arcuate grinding portion extending between the side walls along at least part of their length, and an upper portion between the side walls which has at least two openings aligned with the respective fastener openings in the upper portion of the frame; the aligned fastener openings in the frame and grinding insert configured to receive fasteners which secure the insert and frame together to an in-line skate shoe or boot; the side walls of the insert have a third pair of aligned wheel axle openings on one side of the grinding portion and a fourth pair of aligned wheel axle openings on the opposite side of the grinding portion, the third and fourth pairs of wheel axle openings receiving the wheel axles of third and fourth in-line skate wheels, respectively.