초록 ▼

A roller skate has a truck supporting its rear-wheel axle on which a rearwardly extending rocker is swingable about a horizontal axis, the rear end of this rocker carrying a control roller while its front end engages or forms a pair of pressure elements disposed between the rear wheels. Normally, wi

A roller skate has a truck supporting its rear-wheel axle on which a rearwardly extending rocker is swingable about a horizontal axis, the rear end of this rocker carrying a control roller while its front end engages or forms a pair of pressure elements disposed between the rear wheels. Normally, with all four wheels touching the ground, the control roller is elevated above the road surface; when, however, the front of the skate is lifted in a pivotal motion about the rear axle, this roller contacts the ground and causes the rocker to swing against a spring force whereby the pressure elements are cammed outward to engage the inner faces of the rear wheels for exerting a braking force thereon. The wheel faces may be clad with thin metal disks which coact with the pressure elements and which also form seats for wheel-supporting ball bearings.

대표청구항 ▼

In a wheeled skating device having at least one front wheel and a pair of rear wheels journaled on a transverse axle, the combination therewith of: a truck member between said rear wheels supporting said axle; a bracket fulcrumed on said truck member for limited swinging about a pivotal axis extendi

In a wheeled skating device having at least one front wheel and a pair of rear wheels journaled on a transverse axle, the combination therewith of: a truck member between said rear wheels supporting said axle; a bracket fulcrumed on said truck member for limited swinging about a pivotal axis extending rearwardly of said axle in a direction perpendicular to said rear wheels, said bracket having a pair of flexible lateral arms with front extremities carrying wedge-shaped formations and extending between said rear wheels; a roller journaled on a tail end of said bracket rearwardly of said axle; resilient means tending to maintain said bracket in a limiting position relative to said truck member in which said roller is elevated above a road surface contacted by all said wheels; and an upwardly converging extension on said truck member straddled by and coacting with said wedge-shaped formations for driving said front extremities into frictional engagement with said rear wheels upon an elevation of said front wheel sufficient to lower said roller onto the road surface and to swing said bracket about said pivotal axis against the force of said resilient means whereby a braking force is exerted on said rear wheels.