Christensen, O'Connor, Johnson & Kindness
Metal racket frame
 A metal racket frame includes a metal tube which is bent so as to form a curved head portion, a converging throat portion which extends from the head portion and a handle portion which extends from the throat portion. The metal tube is provided with a pair of spaced elongated partitions which extend along the length of the same. The partitions confine a central space therebetween and a side space on each side of the central space. The throat portion has two branches, each of which is formed with at least one elongated cut-out portion to access one of the side spaces. A bridge portion extends between the branches of the throat portion and cooperates with the head portion to define an oval-shaped, web holding structure. A plastic coating covers the metal tube and has an engaging projection received in each cut-out portion. The bridge portion, the engaging projection and the plastic coating are made of a fiber-reinforced composite material and are simultaneously and integrally formed in a mold after placing the metal tube therein. 
A A A A
A63B A63B A63B A63B
inventional inventional inventional additional
Chen-Chung
Chang