Abstract: A baseball bat made of a rigid material and having an elongated body with a free end tapering to a handle of a reduced diameter includes a cavity within the handle adapted to secure and receive a tubular member therein, a detachable knob with a chamber therein is secured within the cavity of the handle and to a tubular member inserted into the handle cavity. The tubular member includes a plurality of particles interiorly disposed therein, and a fluid interiorly situated within the tubular member. The tubular member is preferably secured to the detachable knob by one or more grooves, ridges, threads, or barbs on a inner surface of the detachable knob which mate with a corresponding set of grooves, ridges, threads or barbs, on a outer surface of the tubular member. The detachable knob is preferably secured to the handle by one or more grooves, ridges, threads, or barbs on the detachable knob mating with a corresponding set of grooves, ridges, threads, or barbs on a inner surface of the handle.

Abstract: A golf club (10) having a grip (11), a shaft (12) and a clubhead (13). A tubular member (14) is positioned in the interior of the shaft (12) at substantially the grip portion (34) and has a first end (24) and a second end (25), said first end (24) having an opening (28) therein which is removably sealed with a plug (17). A hollow spine member (16) is secured within the tubular member (14) and is preferably attached to plug (17) and to the second end (25) of the tube member (14). A slurry (15) composed of a plurality of particles (26) and a fluid (27) is disposed within the tubular member (14). The tubular member (14) may be secured within said golf club by adhesives (30) or by mechanical fastening apparatus.

Abstract: A tennis racket (10) made of a rigid material and having a striking surface (12), a shaft portion (35) and a handle portion (13). A tubular member (14) is positioned in the interior of the racket at substantially the handle portion (13) and has a first end (24) and a second end (25), said first end (24) having an opening (28) therein which is removably sealed with a plug (17). A hollow spine member (16) is secured within said tubular member (14) and is preferably attached to said plug (17) and to said second end (25) of the tube member (14). A slurry (15) composed of a plurality of particles (26) and a fluid (27) is disposed within said tubular member (14). The tubular member (14) may be secured within said racket by adhesives (30) or by mechanical fastening apparatus.

Abstract: A hockey stick (10) having a stick portion (12) and a blade (13). A tubular member (14) is positioned in the interior of the hockey stick (10) at substantially the center of the stick portion (12) and has a first end (24) and a second end (25), the first end (24) having an openign (28) therein which is removably sealed with a plug (17). A hollow spine member (16) is secured within the tubular member (14) and is preferably attached to the plug (17) and to the second end (25) of the tube member (14). A slurry (15) composed of a plurality of particles (26) and a fluid (27) is disposed within the tubular member (14). The tubular member (14) may be secured witin the hockey stick by adhesives (30) or by mechanical fastening apparatus.

Abstract: A baseball bat (10) made of a rigid material and having an impact portion (12) and a handle portion (13). A tubular member (14) is positioned in the interior of the bat at substantially the handle portion (13) and has a first end (24) and a second end (25), said first end (24) having an opening (28) therein which is removably sealed with a plug (17). A hollow spine member (16) is secured within said tubular member (14) and is preferably attached to said plug (17) and to said second end (25) of the tube member (14). A slurry (15) composed of a plurality of particles (26) and a fluid (27) is disposed within said tubular (14). The tubular member (14) may be secured within said bat by adhesives (30) or by mechanical fastening apparatus.