A walker is disclosed. The walker includes a frame, a wheel, a brake selectively positionable in an engaged state, in which the brake resists wheel rotation, or a disengaged state, in which the brake does not resist wheel rotation, a brake actuator configured to place the brake in the engaged state or the disengaged state, a handle, a hand-position sensor configured to provide a first signal responsive to the handle being grasped in a walking grasp and to provide a second signal responsive to the handle being grasped in a standing/sitting grasp, and a processor configured to cause the brake actuator to place the brake in the disengaged state based at least in part on the first signal and to cause the brake actuator to place the brake in the engaged state based at least in part on the second signal. Related devices, systems, and methods are also disclosed.

A rollator for mobility assistance to a user is provided. The rollator includes a chassis foldable in a compacted configuration, wheels rotatably mounted to the chassis, wheel braking assemblies engageable with the wheels, and a pair of handgrips mountable to the chassis and operatively connected to the chassis. Both handgrips have to be configured in a handgrip displacement configuration to configure the wheel braking assemblies into a displacement configuration of the wheels and wherein both wheel braking assemblies are simultaneously in the displacement configuration. The rollator can include a seat assembly which can be configured in a raised configuration and a seated configuration. In the seated configuration, a pressure equal to or greater than a seat pressure threshold has to be applied on the seat for the wheel braking assemblies to be configured in the displacement configuration.

A walker is disclosed. The walker includes a frame, a wheel, a brake selectively positionable in an engaged state, in which the brake resists wheel rotation, or a disengaged state, in which the brake does not resist wheel rotation, a brake actuator configured to place the brake in the engaged state or the disengaged state, a handle, a hand-position sensor configured to provide a first signal responsive to the handle being grasped in a walking grasp and to provide a second signal responsive to the handle being grasped in a standing/sitting grasp, and a processor configured to cause the brake actuator to place the brake in the disengaged state based at least in part on the first signal and to cause the brake actuator to place the brake in the engaged state based at least in part on the second signal. Related devices, systems, and methods are also disclosed.

A walker is disclosed. The walker includes a frame, a wheel, a brake selectively positionable in an engaged state, in which the brake resists wheel rotation, or a disengaged state, in which the brake does not resist wheel rotation, a brake actuator configured to place the brake in the engaged state or the disengaged state, a handle, a hand-position sensor configured to provide a first signal responsive to the handle being grasped in a walking grasp and to provide a second signal responsive to the handle being grasped in a standing/sitting grasp, and a processor configured to cause the brake actuator to place the brake in the disengaged state based at least in part on the first signal and to cause the brake actuator to place the brake in the engaged state based at least in part on the second signal. Related devices, systems, and methods are also disclosed.

A castor with pressure brake device includes a wheel stand; a connecting rod for connecting the wheel stand to a seat base; a wheel shaft; and two wheels. A C-shaped shaft hole is disposed on the wheel stand, and the wheel shaft is longitudinal movably fixed in the C-shaped shaft hole. A groove is disposed above the inner side of the C-shaped shaft hole; a spring is disposed in the groove and arranged vertically to the wheel shaft, wherein an end of the spring is in contact with a bottom of the groove, and the other end of the spring is in contact with the wheel shaft. Each of the wheels comprises a fitting portion, and the fitting portion is tightly sleeved on corresponding one of the two ends of the wheel shaft.