| 摘要 |
<p>IMPROVEMENTS IN ADJUSTABLE RACKET FRAMES 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 z 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.</p> |
