# US 5,344,375 A · Gravity biased exercise apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,344,375 A - Document ID: US5344375A - Status: Granted - Kind: A - Application number: 08/008,512 - Filed: 1993-01-25 - Granted: 1994-09-06 - Earliest claimed: 1993-01-25 - Inventors: Gary L. Cooper - Web page: https://patentgrep.com/patent/US5344375A ## CPC - A63B 21/0728: {with means for fixing weights on bars, i.e. fixing olympic discs or bumper plates on bar-bells or dumb-bells} - A63B 21/00065: {by increasing or reducing the number of resistance units} - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) ## Abstract In an exercise apparatus for exercising having a horizontal bar and a plurality of weights, the weights including a bar receiving slot opening through the lower edge of the weight, and a closed end intermediate the height of the weight and above the center of gravity of the weight when the bar is at the closed end of the slot, the weight being gravity biased to a position where the open end of the slot is below the bar. ## Claims ### Claim 1 In an exercise apparatus including a horizontal bar and weights mounted on said bar, the improvement comprising a plurality of weights each having a flat base surface and each having a bar receiving slot opening through said flat base surface and defined by parallel opposed walls, said walls being perpendicular to said flat base surface and to a broad side surface of said weight, said slot having a closed end intermediate the height of said weight and sufficiently above the center of gravity of said weight that when said bar is at the closed end of said slot the bar is above the center of gravity of said weight, whereby said weight is gravity biased to a position at which said open end of said slot is below said bar, said exercise apparatus including unslotted fixed weights at either end of said horizontal bar and means for securing said fixed weights to said bar. ### Claim 2 (depends on 1) The improvement of claim 1 wherein said exercise apparatus includes a safety latch means to prevent said weight from moving to a position at which said open end of said slot is above said bar. ### Claim 3 (depends on 2) The improvement of claim 2 wherein said safety latch means further comprises a safety pin which blocks said slot when said slot is rotated upward. ### Claim 4 (depends on 1) The improvement of claim 1 wherein said exercise apparatus includes means preventing lateral movement of said weights on said bar. ### Claim 5 (depends on 4) The improvement of claim 4 wherein said means preventing lateral movement further comprises spacers on said bar. ### Claim 6 (depends on 1) The improvement of claim 1 wherein said weights have a trapezoidal lower section with a base of said trapezoidal lower section distal to said bar, said trapezoidal lower section preventing rotational movement of said exercise apparatus when said exercise apparatus is positioned on a flat surface. ### Claim 7 (depends on 1) The improvement of claim 1 wherein said integral handles further comprise a flat upper surface. ### Claim 8 (depends on 7) The improvement of claim 7 wherein a plurality of weights each having said integral handle are so spread and arranged that said flat upper surface of said handles is adapted to support a table top. ### Claim 9 (depends on 1) The improvement of claim 1 wherein said weights include integral handles at their upper end, said integral handles permitting said weights to be selectively loaded on and unloaded from said bar. ### Claim 10 (depends on 1) The improvement of claim 1 wherein said end weights support said bar at a height above a floor at a height sufficient to clear the chest of a user lying under said bar when said end weights rest on said floor. ### Claim 11 In an exercise apparatus including a horizontal bar and weights mounted on said bar, the improvement comprising: a plurality of weights each having a bar receiving slot opening through a lower edge of said weight and a closed end intermediate the height of said weight and sufficiently above the center of gravity of said weight that when said bar is at the closed end of said slot the bar is above the center of gravity of said weight, whereby said weight is gravity biased to a position at which said open end of said slot is below said bar; and means for preventing lateral movement of said weights on said bar including grooves in walls defining said slot and an annular rib concentric about said bar, said annular rib extending into said grooves. ### Claim 12 In an exercise apparatus including a horizontal bar and weights mounted on said bar, the improvement comprising: a plurality of weights each having a bar receiving slot opening to a lower edge of said weight and a closed end intermediate the height of said weight and sufficiently above the center of gravity of said weight that when said bar is at the closed end of said slot the bar is above the center of gravity of said weight, whereby said weight is gravity biased to a position at which said opened end of said slot is below said bar; and a tether attached to said weight adjacent to the open ended of said slot and ground to a floor, said tether maintaining downward orientation of said slot. ### Claim 13 In an exercise apparatus including a horizontal bar and weights mounted as said bar, the improvement comprising: a plurality of weights, each having a bar receiving slot open to a lower edge of said weight and a closed end intermediate the height of said weight and sufficiently above the center of gravity of said weight that when said bar is at the closed end of said slot the bar is above the center of gravity of said weight, whereby said weight is gravity biased to a position at which said open end of said slot is below said bar; unslotted fixed weights at either end of said horizontal bar and means for securing said fixed weights to said bar, said fixed weights preventing said weights from moving laterally to the outer ends of said bar; and magnet means attached to said weights, said magnets securing said fixed end weights to said weights.