A brake system for a wheelchair comprises a lever assembly adapted to be movably connected to a wheelchair frame, the lever assembly having a handle portion for hand manipulation. A brake unit is adapted to be pivotally connected to relative to the wheelchair frame, the brake unit having a brake end adapted to contact the wheel. An actuator portion and a follower portion are in the brake system, the follower portion cooperating with the actuator portion for the brake unit to be selectively displaceable between at least two configurations, including a floating configuration in which the brake end contacts the wheel so as to automatically pivot into blocking contact with the wheel when the wheel rotates rearwardly, while allowing a forward rotation of the wheel, and a locking configuration in which the brake end is manually locked into blocking contact with the wheel.

This relates to a propulsion attachment for a manual wheelchair and methods of operation. The propulsion attachment can include three wheels, a motor, a gearbox, and a handlebar. The propulsion attachment can attach to the footrest of the wheelchair using a pin. The motor can be located in the rear side of the propulsion attachment and can push the user in a forward direction. Alternatively, the user can manipulate a switch located on the handlebar to allow the propulsion attachment to pull the user in a reverse direction. The propulsion attachment can include a plurality of brakes, where each brake can control one of the wheels. Additionally, the propulsion attachment can operate at variable speeds using the motor and the power from one or both batteries.

A mobility device, including a base, a first omnidirectional wheel mounted at a first side of a forward portion of the base to rotate about a first axis, a second omnidirectional wheel mounted at a second side of the forward portion of the base to rotate about the first axis, a third wheel mounted at a rearward portion of the base to rotate about a second axis, a drive system to move the first omnidirectional wheel, the second omnidirectional wheel, and the third wheel according to input received indicating a desired motion of the mobility device, a seat for a user of the mobility device, and a linear actuator coupling the seat to the base to drive the adjustable seat in a vertical direction according to the input received indicating the desired motion of the mobility device.

A medical chair includes a seat supported by a base and actuators adapted to both tilt and lift the seat with respect to the base. A controller controls the actuators to both lift and tilt the seat as the seat moves from the sitting position to the standing position. The movement from the sitting position to the standing position assists in the egress of an occupant from the chair, while the movement from the standing position to the sitting position assists in the ingress of an occupant to the chair. A backrest on the chair remains substantially vertically oriented during movement between the sitting and standing position so as to provide more comfort to the occupant during the sit-to-stand or stand-to-sit movement. The backrest also moves in a manner that generally keeps the occupant's torso vertically aligned with his or her hips during this movement.

There are provided a rear wheel rotatably provided in a body, a seat disposed on a top surface side of the body, a seat link mechanism by which the seat is supported to be movable up and down between a raised position and a lowered position on the top surface side of the body, and a brake mechanism which inhibits the rear wheel from rotating in interlock with the seat link mechanism, when the seat is raised from the lowered position to the raised position.

An all-terrain wheelchair includes a rigid and easy-to-assemble frame. The frame has a seating area with armrests toward the rear of the frame and an adjustable footrest area toward the front of the frame. Attached to the rear axle of the frame and outside the seating area are found two large rear wheels of a sufficient width to provide flotation over soft surfaces. Attached to the front axle of the frame in front of the footrest area is a single large wheel of a sufficient width to provide flotation over soft surfaces. An ergonomically designed push handle is found at the upper rear of the frame behind the seating area, which allows an assistant to propel the chair forward or pull it backward. The frame in front of the front wheel forms a pull handle, which allows an assistant to pull the chair forward or push it backward. A locking brake mechanism is attached to the rear axle to prevent a rear wheel from travel and render the wheelchair motionless when necessary.

A folding wheelchair which prevents unexpected unfolding includes an upper support arm and a lower support arm coupling a left side frame and a right side frame foldable in an up-down direction in central portions thereof in a left-right direction. An engaged section is provided in at least one of the upper support arm and the lower support arm. An engagement section engages the engaged section to prevent relative displacement in the up-down direction of the central portions of the upper support arm and the lower support arm in the left-right direction. An operation section switches operation of the engagement section from an engagement state with the engaged section to an unengaged state.

A wheel lock for a wheelchair is provided. The wheel lock comprises a supporting member configured to attach to a frame of the wheelchair adjacent to a wheel of the wheelchair. The wheel lock also comprises a brake shoe mechanically coupled to the supporting member and configured to be movable between a first directional configuration and a second directional configuration, and a brake pad mechanically coupled to the brake shoe. The wheel lock comprises a lever mechanically coupled to the brake shoe and configured to move the brake shoe between the first directional configuration and the second directional configuration. When the brake shoe is in the first directional configuration, the brake pad does not contact the wheel of the wheelchair. When the brake shoe is in the second directional configuration, the brake pad is configured to mechanically couple to the wheel of the wheelchair to prevent the wheel from rotating.

A lever assembly for a wheelchair having a wheel lock system with two wheel lock assemblies. Each wheel lock assembly including a wheel lock and an actuator with an actuation cable that controllably moves a lock-pin between a locking and an unlocking position relative to the wheelchair wheels. The lever assembly has a body and a lever, with the body attached to the wheelchair and both actuation cables, and the lever attached to and controlling both actuation cables to manipulate the lock-pins to engage or disengage the wheelchair wheels. The lever is adapted for use by disabled occupants.

A brake assembly for a personal mobility vehicle, in form of a racing wheelchair, comprises a brake lever for actuating a brake cable, wherein the brake lever is a 3D printed glass filled nylon unit, in particular with up to 30% glass filled nylon. A steering arm assembly comprises a steering arm with the brake assembly integrated into the steering arm A racing wheelchair with one front wheel is attached to a wheelchair frame via a fork, with two drive wheels as well as a steering cage mounted on the rear of the wheelchair frame. The brake assembly and/or the steering arm assembly are mounted to the wheelchair frame.