US PATENT SUBCLASS 473 / 519
.~ With user shiftable, adjustable, or interchangeable weight for use during play or with freely shiftable mass for increasing impact force

Current as of: June, 1999
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473 /   HD   GAMES USING TANGIBLE PROJECTILE

516  DF  PLAYER HELD AND POWERED, NONMECHANICAL PROJECTOR, PER SE, FOR PROJECTING AERIAL PROJECTILE BY STRIKING; PART THEREOF OR ACCESSORY THEREFOR {8}
519.~ With user shiftable, adjustable, or interchangeable weight for use during play or with freely shiftable mass for increasing impact force

DEFINITION

Classification: 473/519

With user shiftable, adjustable, or interchangeable weight for use during play or with freely shiftable mass for increasing impact force:

(under subclass 516) Subject matter (a) comprising at least one weight element which is attached, or is intended to be attached, to the projecting implement during play, which weight element is further adapted and intended to be either (1) moved or released for movement to a different location on the implement by a user of the implement, either before or during use of the implement, so as to change the overall balance of the implement during use thereof, or (2) added to or substituted for another similar weight element by a user of the implement, either before or during use of the implement, so as to change the overall weight or balance of the implement during use thereof, or (b) comprising a body of material which is movable from one location on or in the implement to a second location on or in the implement as the implement is moved by a user to strike a projectile so that the implement will impart a greater impetus to the projectile when it is struck.