초록 ▼

A grind shoe apparatus incorporating a variable friction grind plate complementally received in the recess of the shoe sole and having a downwardly facing trough and an outwardly facing rail with respective slide surfaces for contacting a support surface to slide therealong. Such plate further inclu

A grind shoe apparatus incorporating a variable friction grind plate complementally received in the recess of the shoe sole and having a downwardly facing trough and an outwardly facing rail with respective slide surfaces for contacting a support surface to slide therealong. Such plate further includes at least one speed control compartment positioned within one of such slide surfaces and having an insert removably carried therein for varying the frictional resistance occurring during sliding maneuvers.

대표청구항 ▼

[ What is claimed is:] [1.]1. A grind shoe apparatus comprising:a shoe sole formed with a downwardly opening recess of a predetermined configuration;a variable friction grind plate complementally received in said recess and including a bottom surface forming a downwardly facing trough with a sliding

[ What is claimed is:] [1.]1. A grind shoe apparatus comprising:a shoe sole formed with a downwardly opening recess of a predetermined configuration;a variable friction grind plate complementally received in said recess and including a bottom surface forming a downwardly facing trough with a sliding surface having a predetermined coefficient of friction, said plate further including an upturned outwardly facing medial rail formed with an outwardly facing track surface, said rail configured with a speed control compartment opening into said track surface;a removable primary speed control insert removably received in said speed control compartment and including a control surface projecting outwardly into said opening and having a coefficient of friction different than said predetermined coefficient of friction.