Patent ID: 8192308

Claim:
A tennis racquet with a replaceable playing surface, comprising: a frame having a handle and an oval head attached to the handle, wherein the frame defines at least one key-aperture, wherein the oval head includes a lower half-oval frame-portion that defines a cartridge support groove, wherein the oval head includes an upper half-oval frame-portion that defines a front upper half-oval bridge and a back upper half-oval bridge, wherein the front upper half-oval bridge includes a front head-guard, wherein the back upper half-oval bridge includes a back head-guard, and wherein the front bridge with its head-guard and the back bridge with its head-guard define a planar passage way; a cartridge having a rim threaded with string, wherein the string defines a playing surface, and wherein the cartridge is adapted for insertion into, and for removal from, the planar passage way; and a cartridge-lock, including at least one key, wherein the at least one key is shaped for entry into the at least one key-aperture to lock the cartridge into the frame; such that a cartridge within the frame may be removed from the frame and replaced by a replacement cartridge without the use of tools.