Abstract: An ice skating attachment can be interchangeably attached to conventional roller skate foot plates so that a foot receiving device on which such a foot plate is mounted can serve both as a roller skate or as an ice skate. The ice skating blade of the attachment is mounted on the foot plate by means of a pair of support members which are constructed in accordance with standard foot plate dimensions. Thus, the upper surfaces of the support members conform to the lower surfaces of standard foot plates and are attachable thereto in substantially the same manner as most roller skate trucks. The attachment is inexpensively manufactured by an injection molding process during which the ice skating blade is secured to the support members to form a unitary integral device that requires no assembly.

Abstract: A one-piece, plastic molded, roller skate chassis, including foot plate, trucks, and wheel axles. Each truck, which provides for turning in a conventional manner, includes a cylindrical torsional member, inclined at a predetermined angle with respect to the foot plate, and a shank attached at one end to the torsion member and at the opposite end to a cylindrical shaft which receives the axle of the roller skate. The plastic from which the present chassis is molded is tough and durable, and yet sufficiently flexible and resilient to allow turning. Also disclosed is an adjustable two-piece skate chassis in which each mating member is on a one-piece, molded plastic molded construction.