Tennis, squash, or badminton racquet construction - has fluid filled ducts from handgrip running around divided frame ducts

摘要

Liquids of different specific gravity and viscosity may be used to flow in ducts leading from a hollow handgrip to ducts inside frame. As liquid flows from the handgrip to the frame, the weight increases at the frame tip and enables the player to hit the ball with more force. - The racquet has a handgrip (1), neck (2) and frame head (3). The frame encloses ducts (5) filled with fluid (6). Both sides the ducting are separated. Torsion forces are thus eliminated. Both halves (10,11) are split into two ducts with bores (12).