# US 5,649,883 A · Racer wheelchair trainer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,649,883 A - Document ID: US5649883A - Status: Granted - Kind: A - Application number: 08/595,298 - Filed: 1996-02-01 - Granted: 1997-07-22 - Earliest claimed: 1996-02-01 - Assignees: D&J Development Workshop, Inc. - Inventors: Douglas Mayes; Jerome M. Burak - Web page: https://patentgrep.com/patent/US5649883A ## CPC - A63B 71/0009: {for handicapped persons} - A63B 21/0051: {using eddy currents induced in moved elements, e.g. by permanent magnets} - A63B 69/16: for cycling {, i.e. arrangements on or for real bicycles} - A63B 2069/167: {on rollers without further support} - A63B 2071/0018: {for wheelchair users} - Y10S 482/904: Removably attached to wheelchair, home furnishing, or home structure - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract Wheelchair trainer apparatus for use with a three-wheel racer wheelchair and which may be effectively utilized as part of a computerized system for physiological training and simulated road race training. A jack supports the wheelchair frame such that the drive wheels just make frictional driving contact with the crest of one of two of the trainer's rollers. Undesired drag, caused by the weight of the wheelchair and its user, is substantially decreased or virtually eliminated, enhancing the trainer's ability to simulate real road conditions. ## Claims ### Claim 1 Wheelchair trainer apparatus comprising the combination of: a racer wheelchair having two rear drive wheels and one front wheel mounted to a wheelchair frame; a trainer frame; a roller having a longitudinal axis and mounted to said trainer frame for being rotatably driven about said axis; a front wheel support carried by said trainer frame for holding said front wheel of said wheelchair such that said drive wheels contact said roller for rotatably driving said roller with the center of each of said drive wheels directly vertically above said roller axis; and a jack carried by said trainer frame and operable by a user of said wheelchair when said wheelchair is positioned on said trainer frame with said front wheel held by said front wheel support and said drive wheels contacting said roller, for contacting said wheelchair frame and for exerting an upward force upon said wheelchair frame such that said wheelchair and the user are supported with said drive wheels just making frictional driving contact with said roller. ### Claim 2 (depends on 1) The apparatus according to claim 1, further including: a ramp for accessing said wheelchair to said trainer frame such that said front wheel is held by said front wheel support and said drive wheels contact said roller for rotatably driving said roller. ### Claim 3 (depends on 1) The apparatus according to claim 1, further including: a load generator coupled to said roller for applying rotational resistance to said roller; and a control module for controlling said load generator. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein: said front wheel support is horizontally adjustable perpendicular to said axis of said roller for adjusting position of said front wheel such that said drive wheels contact said roller with the center of each of said drive wheels directly vertically above said roller axis and said wheelchair frame is positioned for being supported by said jack. ### Claim 5 (depends on 4) The apparatus according to claim 4, further including: a second roller having a longitudinal axis and mounted to said trainer frame for being rotatably driven about said axis of said second roller and with said axes of said rollers parallel to one another. ### Claim 6 (depends on 5) The apparatus according to claim 5, wherein: said front wheel support is horizontally adjustable perpendicular to said axis of said second roller for adjusting position of said front wheel such that said drive wheels contact said second roller with the center of each of said drive wheels directly vertically above said axis of said second roller and said wheelchair frame is positioned for not being supported by said jack. ### Claim 7 (depends on 6) The apparatus according to claim 6, wherein: one of said rollers is heavier than the other of said rollers. ### Claim 8 (depends on 6) The apparatus according to claim 6, wherein: the diameter of said second roller is less than the diameter of the first of said rollers and the crests of said rollers are in the same horizontal plane. ### Claim 9 (depends on 8) The apparatus according to claim 8, further including: a load generator coupled to said first of said rollers for applying rotational resistance thereto; and a control module for controlling said load generator. ### Claim 10 (depends on 1) The trainer apparatus according to claim 1, wherein: said wheelchair frame includes a bar connecting the axles of said drive wheels; and said jack includes pads situated such that said bar is directly above said pads when said wheelchair is positioned on said trainer frame with said front wheel held by said front wheel support, said jack including means operable by the user for raising said pads to contact said bar and for exerting said upward force on said bar.