# US 5,704,876 A · Wheelchair aerobic exercise trainer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,704,876 A - Document ID: US5704876A - Status: Granted - Kind: A - Application number: 08/673,226 - Filed: 1996-06-28 - Granted: 1998-01-06 - Earliest claimed: 1996-06-28 - Assignees: Racer-Mate, Inc. - Inventors: Wilfried Baatz - Web page: https://patentgrep.com/patent/US5704876A ## CPC - A63B 71/0009: {for handicapped persons} - A63B 21/0052: {induced by electromagnets (A63B21/0056 takes precedence)} - A63B 69/16: for cycling {, i.e. arrangements on or for real bicycles} - A63B 2069/165: {rear wheel hub supports} - A63B 2069/167: {on rollers without further support} - A63B 2071/0018: {for wheelchair users} - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) ## Abstract An aerobic wheelchair trainer (10) is provided. The wheelchair trainer includes a ramp (12) having a plurality of level steps (24-28). The steps lead a wheelchair inserted into the wheelchair trainer onto a platform (13). The wheelchair trainer also includes a support mechanism (16) that supports the weight of the wheelchair (22) and wheelchair occupant. A load mechanism (18) including a resistance roller (70) and an eddy current brake (110) is also included. The load mechanism provides a variable resistance to movement of the wheels (20) of the wheelchair. The wheelchair trainer (10) also includes a lift mechanism (14) that lifts the rear end of the wheelchair up and into or out of the support mechanism (16). The load mechanism (18) is connected to a controller (144). The wheelchair trainer (10) may be used either individually or may be connected to another compatible wheelchair trainer (10) over a phone line (152). ## Claims ### Claim 1 An aerobic wheelchair trainer comprising: a platform that receives a wheelchair and wheelchair occupant; a support mechanism coupled to the platform and wheelchair to support the weight of the wheelchair and wheelchair occupant; and a load mechanism that engages the wheels of the wheelchair and provides a variable resistance to rotation of the wheels of the wheelchair, the load mechanism including a roller and a mechanism for moving the roller into contact with at least one of the wheels with a varying force to adjust the magnitude of rolling resistance between the roller and the wheel. ### Claim 2 (depends on 1) The wheelchair trainer of claim 1, further comprising a ramp attached to the front of the platform that allows the wheelchair occupant to maneuver the wheelchair up the ramp onto the platform. ### Claim 3 (depends on 2) The wheelchair trainer of claim 2, wherein the ramp includes a plurality of level on which the wheelchair may rest in an immobile state as the wheelchair is moved up or down the ramp. ### Claim 4 (depends on 3) The wheelchair trainer of claim 3, wherein opposite ends of the roller engage opposing wheels of the wheelchair and wherein the ends of the roller can be independently adjusted to adjust the amount of force placed on the individual wheels of the wheelchair by each end of the roller. ### Claim 5 (depends on 1) The wheelchair trainer of claim 1, wherein the support mechanism further comprises pillars that extend upward from the surface of the platform, the pillars including axle supports that support the axles of the wheelchair. ### Claim 6 (depends on 1) The wheelchair trainer of claim 1, wherein the support mechanism further comprises pillars that extend upward from the surface of the platform and that support the frame of the wheelchair. ### Claim 7 (depends on 5) The wheelchair trainer of claim 5, wherein the support mechanism further comprises support balls attached to the axles of the wheelchair and wherein the axle supports include ball supports to support the support balls. ### Claim 8 (depends on 1) The wheelchair trainer of claim 1, further comprising a lift mechanism for allowing the wheelchair occupant to, maneuver the wheelchair into or out of the support mechanism without the help of another person, the lift mechanism further comprises a lift bar that is located under the wheels of the wheelchair and that may be moved up or down in order to raise or lower the wheelchair. ### Claim 9 (depends on 8) The wheelchair trainer of claim 8, further comprising lift arms that are pivotally attached to the platform and the lift bar so that rotation of the lift arms moves the lift bar up and down. ### Claim 10 (depends on 1) The wheelchair trainer of claim 1, further comprising guide walls that extend upward from the surface of the platform and inward to position the wheelchair in the proper position as the wheelchair is moved rearward onto the platform. ### Claim 11 (depends on 1) The wheelchair trainer of claim 1, wherein the load mechanism further comprises an eddy current brake that provides a variable resistance to rotation of the wheels of the wheelchair. ### Claim 12 (depends on 11) The wheelchair trainer of claim 11, wherein the load mechanism further comprises a controller and display that are connected to the eddy current brake, the controller being adjustable by the wheelchair occupant to provide a varying current to the eddy current brake and thus a varying resistance to rotation of the wheels of the wheelchair. ### Claim 13 (depends on 12) The wheelchair trainer of claim 12, further comprising a means for measuring the speed or distance of rotation of the wheels of the wheelchair, wherein the controller receives a signal from the measuring means and provides a signal to the display to provide the wheelchair occupant interactive feedback indicative of the performance on the wheelchair trainer. ### Claim 14 (depends on 13) The wheelchair trainer of claim 13, further comprising a modem connected to the controller and to a phone line, the modem providing the controller with information from a wheelchair trainer located on the opposite end of the phone line to allow the controller to provide the wheelchair occupant an indication of performance with respect to another wheelchair occupant using the wheelchair trainer at the opposite end of the phone line. ### Claim 15 An aerobic wheelchair trainer comprising: a platform adapted to receive a wheelchair; a support mechanism coupled to the platform to support the majority of the weight of the wheelchair and a wheelchair occupant; a lift mechanism comprising a lift bar that is located under the wheels of the wheelchair and that may be moved up or down in order to raise or lower the wheelchair so that a wheelchair occupant may maneuver the wheelchair into the support mechanism without the help of another person; and a load mechanism that engages the wheels of the wheelchair and provides a variable resistance to the rotation of the wheels. ### Claim 16 (depends on 15) The wheelchair trainer of claim 15, further comprising lift arms that are pivotally attached to the platform and the lift bar so that rotation of the lift arms moves the lift bar up and down. ### Claim 17 (depends on 15) The wheelchair trainer of claim 15, wherein the support mechanism further comprises pillars that extend upward from the surface of the platform, the pillars including axle supports that support the axles of the wheelchair. ### Claim 18 (depends on 15) The wheelchair trainer of claim 15, wherein the support mechanism further comprises pillars that extend upward from the surface of the platform and that support the frame of the wheelchair. ### Claim 19 (depends on 17) The wheelchair trainer of claim 17, wherein the support mechanism further comprises support balls attached to the axles of the wheelchair and wherein the axle supports include ball supports to support the support balls. ### Claim 20 (depends on 15) The wheelchair trainer of claim 15, wherein the load mechanism further comprises an eddy current brake that provides a variable resistance to rotation of the wheels of the wheelchair. ### Claim 21 (depends on 15) The wheelchair trainer of claim 15, further comprising a ramp attached to the front of the platform that allows the wheelchair occupant to maneuver the wheelchair up the ramp onto the platform, the ramp having a plurality of level steps on which the wheelchair may rest in an immobile state as the wheelchair is maneuvered up or down the ramp. ### Claim 22 An aerobic wheelchair trainer, comprising: a platform adapted to receive a wheelchair; a ramp attached to the front of the platform and including a plurality of level steps that allow a wheelchair occupant to maneuver a wheelchair up the ramp onto the platform by maneuvering the wheelchair up the plurality of level steps such that the occupant may release the wheels of the wheelchair and the wheelchair wheels will remain on the respective level steps without the wheelchair rolling down the ramp; a support coupled to the platform and the wheelchair when the wheelchair is positioned on the platform to support the majority of the weight of the wheelchair and wheelchair occupant; and a load mechanism that engages the wheels of the wheelchair and provides a varying resistance to the rotation of the wheels. ### Claim 23 (depends on 22) The wheelchair trainer of claim 22, wherein the support further comprises pillars that extend upward from the surface of the platform and that include axle supports that attach to and support the axles of the wheelchair. ### Claim 24 (depends on 23) The wheelchair trainer of claim 23, wherein the support further comprises ball supports that support balls that are attached to the axles of the wheelchair. ### Claim 25 (depends on 22) The wheelchair trainer of claim 22, further comprising a lift bar located under the wheels of the wheelchair when the wheelchair is resting on the platform and that is movable up and down and that raises or lowers the wheelchair so that the wheelchair occupant may maneuver the wheelchair into the support without the aid of another person.