# US 11,298,280 B2 · Wheelchair incorporated with a lift apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,280 B2 - Document ID: US11298280B2 - Status: Granted - Kind: B2 - Application number: 16/363,667 - Filed: 2019-03-25 - Published: 2020-10-01 - Granted: 2022-04-12 - Earliest claimed: 2019-03-25 - Applicants: Ken MayField - Inventors: Ken MayField - Web page: https://patentgrep.com/patent/US11298280B2 ## CPC - A61G 5/104: {Devices for lifting or tilting the whole wheelchair (transfer lifts A61G3/06; arrangements for adjusting the seat height A61G5/1059)} - A61G 5/1059: {adjusting the height of the seat} - A61G 5/0891: {having rigid supports, e.g. seat or back supports which retain their shape after folding of the wheelchair} - A61G 5/1048: {for the back-rest} - A61G 7/057: Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor {(ventilation openings in mattresses A47C21/042; pneumatic or hydraulic mattresses A47C27/08)} - A61G: TRANSPORT, PERSONAL CONVEYANCES OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS (appliances for aiding patients or disabled persons to walk A61H3/00); OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES (embalming corpses A01N1/00) ## Abstract A wheelchair incorporated with a lift apparatus is disclosed. The wheelchair comprises a pair of seat frame support bars, backrest support bars, and armrest frame support bars for supporting at least one seat cushion, backrest cushion, and armrest cushions. The wheelchair further comprises lower support bars positioned parallel and opposite each other on both sides of the wheelchair. The support assembly includes a plurality of scissor links pivotally connected to each other, and an end of the plurality of scissor links is pivotally affixed with needle bearings to the lower support bars and the seat frame support bars. The lift apparatus includes one or more actuators, positioned between the lower support bars and at least one scissor link on both sides. The actuators are configured to raise and lower the seat cushion by raising at least one scissor link, thereby raising and lowering the seat cushion to a desired adjustable height for the user. ## Claims ### Claim 1 A wheelchair incorporated with a lift apparatus, comprises: a pair of seat frame support bars configured to secure at least one seat cushion; a pair of backrest support bars configured to secure a backrest cushion; a pair of armrest frame support bars movably affixed to the pair of backrest support bars; a pair of lower support bars positioned parallel and opposite each other on both sides of the wheelchair; a support assembly includes a plurality of scissor links on both sides of the wheelchair, wherein the plurality of scissor links is pivotally connected to each other, and an end of the plurality of scissor links is pivotally affixed to the lower support bar and the seat frame support bar via fasteners, a lift apparatus includes one or more actuators positioned between the lower support bars and at least one scissor link on both sides, wherein the one or more actuators are configured to raise and lower the seat cushion by raising the least one scissor link, thereby raising and lowering the seat cushion to a desired adjustable height for a user; a foot rest assembly includes a pair of leg support bars carrying a foot rest, pivotally affixed to the pair of seat frame support bars via gas shock absorbers; and a pair of front wheels that rotate 360 degrees and rear wheels that both are affixed to the pair of lower support bars, configured to rotate in a direction for providing maximum mobility for the wheelchair. ### Claim 2 (depends on 1) The wheelchair of claim 1, is made of a material that includes a metal and an aluminum. ### Claim 3 (depends on 1) The wheelchair of claim 1, wherein the backrest cushion is configured to adjust at desired angle positions for providing flexibility and comfort for the user. ### Claim 4 (depends on 1) The wheelchair of claim 1, further comprises a pair of armrest cushions affixed to the pair of armrest frame support bars. ### Claim 5 (depends on 1) The wheelchair of claim 1, further comprises a rear wheel braking system, configured to lock the rear wheels before initiating the lift apparatus for lifting the seat cushion to a desired height. ### Claim 6 (depends on 5) The wheelchair of claim 5, wherein the rear wheel braking system is further configured to easily brake the rear wheels and control the speed of the wheelchair. ### Claim 7 (depends on 5) The wheelchair of claim 5, wherein the rear wheel braking system includes a brake lever, a brake plate, and a brake pad, positioned at a center portion of the rear wheels. ### Claim 8 (depends on 7) The wheelchair of claim 7, wherein the brake lever is disposed at the center portion of the rear wheels to enable the user for easily braking the rear wheels while in motion to control the speed of the wheelchair. ### Claim 9 (depends on 1) The wheelchair of claim 1, wherein the actuators are micro-electrical actuators. ### Claim 10 (depends on 1) The wheelchair of claim 1, wherein the at least one actuator is diametrically disposed between the support assembly. ### Claim 11 (depends on 1) The wheelchair of claim 1, wherein the one or more actuators are configured to stabilize the wheelchair for lateral movements. ### Claim 12 (depends on 1) The wheelchair of claim 1, further comprises an automatic powered mechanical assist, configured to automatically fold and unfold the wheelchair. ### Claim 13 (depends on 1) The wheelchair of claim 1, wherein the foot rests are configured to adjust at desired angle positions for providing flexibility and comfort for the user. ### Claim 14 (depends on 1) The wheelchair of claim 1, wherein the foot rests further comprise an extension portion, configured to extend and retract to a desired length for accommodating different foot sizes of the users. ### Claim 15 (depends on 1) The wheelchair of claim 1, wherein the gas shock absorbers are disposed between the leg support bars and the at least one scissor link on both sides. ### Claim 16 (depends on 1) The wheelchair of claim 1, wherein the gas shock absorbers are configured to provide flexible movement for the foot rest assembly. ### Claim 17 (depends on 1) The wheelchair of claim 1, further comprises shock absorbers positioned between the plurality of scissor links, configured to provide stability and reduce friction between the plurality of scissor links. ### Claim 18 (depends on 17) The wheelchair of claim 17, wherein the shock absorbers are rubber shock absorbers. ### Claim 19 (depends on 1) The wheelchair of claim 1, wherein the wheelchair includes a rotary actuator to lift the wheelchair.