Abstract: Improvements in adjustable and other racket handles and shafts consisting of an improved durable yet light weight simplified unitized or self-integral structure which is firmly fixable and readily releasable by fully concealed internal wedges which are operated by a single long screw inside the handle and accessible from the bottom end. The detachable interchangeable handles are made in a range of outer sizes available in sets or singly from stock. The handle also has improvements in end cap shape and function. It also has innovative improvements in cover material form and application this being the use of a single standard sized diameter and tubular length of special kind of cover material and a material-stretching and locking rod applied against the material to lock it into a concealed groove positioned lengthwise within the handle. This comprises a new application for a special kind of elastomeric synthetic leather material, in a new way which improves handles.

Abstract: The basic racket frame is comprised of an oval head, a yoke merging into a throat and a solid or a hollow shaft which is formed from a single length of collimated filaments preferably graphite fibers, known as a roving impregnated with a thermosetting resin. To form the racket frame, the single length of roving is wound up the handle, around the entire circumference of the head and back down the handle. This winding technique forms a hollow handle to which is attached a hollow, removably interfitting grip portion. This grip portion is then fitted with a cover consisting of stretchable, cylindric bands. The racket frame also includes a throat piece comprised of a plastic insert covered on opposite faces by a mat of filaments. The filaments in this mat are positioned parallel to the filaments in the handle.