Roller skate

Claim 1

In a steerable roller skate of the shoe skate variety, the improvement comprising an elongated, one-piece sole plate in the form of an open-topped dish with a bottom wall and a side wall and, at the upper edge of said side wall, a continuous rim, rising from the toe end toward the heel end to meet with a heel-less shoe sole uninterruptedly around said sole, a pair of support-shaft bosses extending upwardly from said bottom wall no higher than the said rim, each with an open-ended, smooth-walled, vertical passage, each boss being crowned with a lip around said passage defining a non-circular seat to receive the complementarily shaped head of a bolt threaded at its other end and each having reinforcing cross ribs integral with said bottom wall and integral with and extending between said bosses and said side wall, and a pair of bearing tongue seats formed in said botton wall, said seats and bosses having no reentrant surface with respect to the adjacent surfaces of the bottom wall, whereby the sole plate can be made in a simple two-piece mold with a straight draw.