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US 4,949,967 AGranted
Tennis game board
OwnerMasatoshi Todokoroinventor
Life of this patent
Estimating the term…
Abstract
In the tennis game board, each of the racket-supporting bodies that are reciprocally movable along each end of the base board is provided with a ball delivery member, which directly feeds the ball onto the board surface as if the ball was served by one of the racket-supporting bodies. After this, the ball on the board surface of the base board is hit alternately by the opposedly disposed racket-supporting bodies, thus enabling the game like tennis to be performed.
Claims8
A tennis game board comprising:
- (a) a base board having a board surface formed on its upper surface on which a ball is rolled;
- (b) a racket-supporting body mounted at each end of the board surface in such a way that the racket-supporting bodies can be moved along the ends of the board surface;
- (c) a main shaft mounted inside the racket-supporting body;
- (d) a racket drive shaft mounted inside the racket-supporting body, the racket drive shaft supporting the racket that is used to strike the ball rolling toward it on the board surface;
- (e) a cam plate mounted on the main shaft, the cam plate having an action curve that transmits the ball hitting motion to the racket;
- (f) a windup spring supported on the main shaft to transmit the rotating force to the cam plate;
- (g) a winding mechanism hooked up to the windup spring;
- (h) a link coupled to the racket drive shaft, the link having a cam follower that engages the action curve in the cam plate;
- wherein each of the racket-supporting bodies includes a ball delivery member having a ball gutter portion and a ball leading portion, the ball leading portion being adapted to feed the ball from the ball gutter portion so that the ball will fall rolling onto the board surface at a position close to each racket-supporting body and roll toward the other racket-supporting body at the other end of the board surface;
- (i) said ball delivery member consisting of a ball gutter portion disposed above and on the side of the racket-supporting body, with a ball leading portion having a U-shaped cross-section, the ball leading portion extending along a downward slope from the ball gutter portion and projecting slightly from the front of the racket supporting body, the slope becoming gentler as the slope goes downward;
- (j) a mounting plate provided to the side of the ball leading portion of the ball delivery member, the mounting plate being capable of being removably attached to the side of the racket-supporting body.
8 more elements
Dependencies are inferred from the claim text.