# US 5,643,143 A · Wheelchair trainer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,643,143 A - Document ID: US5643143A - Status: Granted - Kind: A - Application number: 08/594,126 - Filed: 1996-01-31 - Granted: 1997-07-01 - Earliest claimed: 1996-01-31 - Assignees: D&J Development Workshop, Inc. - Inventors: Jerome M. Burak; Douglas Mayes - Web page: https://patentgrep.com/patent/US5643143A ## CPC - A63B 71/0009: {for handicapped persons} - 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 four-wheel everyday or sports wheelchair. The trainer includes a support plate carried by the trainer frame for holding the wheelchair front caster wheels in a position such that the wheelchair drive wheels drivably contact a roller with the center of each of the drive wheels directly vertically above the roller's rotational axis. In a preferred embodiment, the plate alternatively holds the wheelchair front caster wheels in a second position such that the wheelchair drive wheels drivably contact a second roller with the center of each of the drive wheels directly vertically above the second roller's rotational axis. ## Claims ### Claim 1 Wheelchair trainer apparatus, comprising the combination of: a wheelchair having two rear drive wheels and two front caster wheels; a frame; a first roller having a longitudinal axis and mounted to said frame for being rotatably driven about said axis of said first roller; a second roller having a longitudinal axis and mounted to said frame for being rotatably driven about said axis of said second roller and with said axes of said rollers parallel to one another and horizontally spaced apart by a predetermined distance; and a support secured to said frame including a first trough parallel to said axes for receiving said wheelchair front caster wheels in a first position such that said wheelchair drive wheels contact said first roller for rotatably driving said first roller with the center of each of said drive wheels directly vertically above said axis of said first roller, said support further including a second trough parallel to said first trough and horizontally spaced therefrom by said predetermined distance for alternatively receiving said wheelchair front caster wheels in a second position such that said wheelchair drive wheels contact said second roller for rotatably driving said second roller with the center of each of said drive wheels directly vertically above said axis of said second roller. ### Claim 2 (depends on 1) The apparatus according to claim 1, further including: a ramp secured to said frame for forwardly accessing said wheelchair to said frame such that said wheelchair front caster wheels are alternatively received by said troughs in said positions. ### Claim 3 (depends on 1) The apparatus according to claim 1, further including: a load generator coupled to said first roller for applying rotational resistance to said first roller; and a control module for controlling said load generator. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein: said support is horizontally adjustable with respect to said frame perpendicularly to said axes, for adjusting position of said first trough and said second trough for receiving said wheelchair front caster wheels in said first position and alternatively in said second position. ### Claim 5 (depends on 1) The apparatus according to claim 1, further including: means for locking said wheelchair two front caster wheels to prevent pivoting thereof when received by one of said troughs. ### Claim 6 (depends on 1) The apparatus according to claim 1, wherein: said frame includes a rail extending horizontally perpendicular to said axes, and said support is adjustably securable along said rail for adjusting position of said first trough for receiving said wheelchair front caster wheels in said first position and alternatively for receiving said wheelchair front caster wheels in said second position without further adjustment of said support. ### Claim 7 (depends on 6) The apparatus according to claim 6, wherein: said first roller is heavier than said second roller. ### Claim 8 (depends on 6) The apparatus according to claim 6, wherein: the diameter of said first roller is greater than the diameter of said second roller, and the crests of said rollers are in the same horizontal plane. ### Claim 9 (depends on 8) The apparatus according to claim 8, wherein: said support is carried by said frame such that the bottoms of said wheelchair front caster wheels are in said horizontal plane when said wheelchair front caster wheels are received by either of said troughs. ### Claim 10 (depends on 9) The apparatus according to claim 9, further including: a load generator coupled to said first roller for applying rotational resistance thereto; and a control module for controlling said load generator. ### Claim 11 Wheelchair trainer apparatus, comprising the combination of: a wheelchair having two rear drive wheels and two front caster wheels; a trainer frame; a roller having a longitudinal axis and mounted to said frame for being rotatably driven about said axis; a ramp secured to said frame for forwardly accessing said wheelchair up said ramp and to said frame; and a support secured to said frame for captively receiving said wheelchair front caster wheels in a position when said wheelchair is forwardly accessed to said frame such that said wheelchair drive wheels drivably contact said roller with the center of each of said drive wheels directly vertically above said axis. ### Claim 12 (depends on 11) The apparatus according to claim 11, further including: a load generator coupled to said roller for applying rotational resistance thereto; and a control module for controlling said load generator. ### Claim 13 (depends on 11) The apparatus according to claim 11, wherein: said support includes a plate having a trough parallel to said axis for captively receiving said wheelchair front caster wheels in said position. ### Claim 14 (depends on 13) The apparatus according to claim 13, further including: means for locking said wheelchair two front caster wheels to prevent pivoting thereof when received by said trough. ### Claim 15 (depends on 13) The apparatus according to claim 13, wherein: said frame includes a rail extending horizontally perpendicular to said axis, and said plate is adjustably securable along said rail for adjusting position of said trough for captively receiving said wheelchair front caster wheels in said position. ### Claim 16 (depends on 15) The apparatus according to claim 15, wherein: said plate is secured to by said frame such that the bottoms of said wheelchair front caster wheels and the crest of said roller are in the same horizontal plane when said wheelchair front caster wheels are received by said trough. ### Claim 17 (depends on 16) The apparatus according to claim 16, further including: a load generator coupled to said roller for applying rotational resistance thereto; and a control module for controlling said load generator.