# US 2021/0275370 A1 · Electrical power assistance device for transport wheelchair > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0275370 A1 - Document ID: US20210275370A1 - Status: Published application - Kind: A1 - Application number: 17/327,110 - Filed: 2021-05-21 - Published: 2021-09-09 - Earliest claimed: 2019-04-05 - Assignees: Udeego, Inc. - Applicants: Udeego, Inc. - Inventors: Susan Penski; David J. Carson - Web page: https://patentgrep.com/patent/US20210275370A1 ## CPC - A61G 5/047: {by a modular detachable drive system} - A61G 5/045: {Rear wheel drive} - A61G 5/048: {Power-assistance activated by pushing on hand rim or on handlebar} - A61G 5/0816: {folding side to side, e.g. reducing or expanding the overall width of the wheelchair} - A61G 5/0825: {comprising a scissor-type frame, e.g. having pivoting cross bars for enabling folding} - A61G 5/0875: {dismountable, e.g. where the wheelchair can be disassembled for transportation or storage} - 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 An electrical power assistance device designed to be removably coupled to existing transport wheelchairs to provide electric power to aid in transportation of a person sitting in the wheelchair, while being detachable to allow the transport chair to fold up for easy storage in a car or other vehicle. The electrical power assistance device includes a motor powered by a rechargeable battery, where the motor drives an internal shaft which rotates a pair of friction wheels. A clutch, provided on a separate axle coupled to the friction wheels by eccentric disks, allows the friction wheels to engage or disengage with the rear wheels of the transport wheelchair. ## Claims ### Claim 1 A detachable electrical power assistance device for coupling to a transport wheelchair, said device comprising: a housing releasably securable to a wheelchair; a motor including a motor control board positioned with said housing; said motor including a pair of gears constructed and arranged to convert rotational motion produced by said motor; a rechargeable battery electrically coupled to said motor and said motor control board; a pair of friction wheels rotatably coupled to said motor by a drive shaft; and a differential operatively associated with said drive shaft for rotation of said friction wheels; wherein said friction wheels are used to rotate the wheels on said transport wheelchair for movement thereof. ### Claim 2 (depends on 1) The detachable electrical power assistance device according to claim 1 wherein said housing is attached to a frame of said transport frame by a T shaped attachment protrusion which engages a recessed slot in the housing with a pair of positioning handles to align said housing to said frame. ### Claim 3 (depends on 1) The detachable electrical power assistance device according to claim 1 wherein said positioning handles include adjustable extensions to couple said housing to transport wheelchairs of different widths. ### Claim 4 (depends on 1) The detachable electrical power assistance device according to claim 1 wherein said control board includes a power controller dial to adjust power settings. ### Claim 5 (depends on 1) The detachable electrical power assistance device according to claim 1 wherein said control board allows forward or reverse rotation of said drive shaft. ### Claim 6 (depends on 1) The detachable electrical power assistance device according to claim 1 wherein said drive shaft include a clutch constructed and arranged to engage said friction wheels, said clutch connected to an internal clutch axle having an eccentric disk on each end of said clutch axle. ### Claim 7 (depends on 1) The detachable electrical power assistance device according to claim 1 including an engagement plate to change the angle of a shaft to allow wheel gearing to be moved into an engagement position. ### Claim 8 (depends on 1) The detachable electrical power assistance device according to claim 1 including an emergency brake having a lever pivotally connected the housing, said emergency brake coupled to a pair of solenoid actuators to force said lever into an operating position wherein said lever blocks the gears of said motor from moving. ### Claim 9 (depends on 2) The detachable electrical power assistance device according to claim 2 including a hand controller constructed to attach to the transport wheelchair as one of the handles, the hand controller constructed and arranged to allow a user to control the amount of powered motive assistance provided by the electrical power assistance device to the transport wheelchair. ### Claim 10 (depends on 9) The detachable electrical power assistance device according to claim 9 wherein the hand controller provides a button for causing forward powered motive assistance to the transport wheelchair and a button for causing rearward powered motive assistance to the transport wheelchair. ### Claim 11 (depends on 9) The detachable electrical power assistance device according to claim 9 wherein the hand controller is connected to the electrical power assistance device through a cable connection. ### Claim 12 (depends on 9) The detachable electrical power assistance device according to claim 9 wherein the hand controller is connected to the electrical power assistance device through a wireless connection. ### Claim 13 (depends on 9) The detachable electrical power assistance device according to claim 9 wherein the hand controller includes a potentiometer with a trigger to provide control of the amount of assistance provided by the electrical power assistance device to the transport wheelchair. ### Claim 14 (depends on 9) The detachable electrical power assistance device according to claim 9 wherein the hand controller includes a potentiometer with a twist grip to provide control of the amount of assistance provided by the electrical power assistance device to the transport wheelchair. ### Claim 15 (depends on 9) The detachable electrical power assistance device according to claim 9 wherein the hand controller includes a housing, the housing including an opening sized and shaped to slide over a handle portion of the transport wheelchair frame.