A formfitting securing device for a roller has a rotation blocking engagement part which is biased into an engagement position by means of a first spring. The first spring exerts a bias onto the rotation-blocking engagement part both in the engaged position as well as in the nonengaged position, and a bias is achieved in the non-engaged position by acting on the rotation-blocking engagement part by means of a second spring.

A caster assembly includes a base body, a tubular member, a retaining member and two wheel units. The base body includes an inner surrounding surface, a through hole surrounded by the inner surrounding surface, and a positioning slot extending along a line tangent to the inner surrounding surface and communicating with the through hole. The tubular member is inserted into the through hole. The retaining member is inserted into the positioning slot to retain the tubular member within the through hole. The wheel units are respectively and rotatably sleeved on two lateral connection portions of the tubular member.

A brake mechanism for a brake caster is disclosed. In various embodiments, the brake mechanism includes a shaft; a guide plate having a roller; and a slider plate having a first axial facing surface with a slider plate trough and a slider plate peak, the slider plate configured to slide on the shaft in response to the roller interacting with the slider plate trough and the slider plate peak.

Systems and methods for facilitating movement of a patient transport apparatus. The patient transport apparatus has a support structure and a patient support surface. Caster assemblies are coupled to the support structure to roll about a roll axis and swivel about a swivel axis. A control system is configured to control brake mechanisms, steer-lock mechanisms, and pre-swivel mechanisms of the caster assemblies based on one or more inputs.

A baby walker comprises sensors and control mechanisms to detect dangerous situations and to stop or substantially slow the baby walker. The baby walker uses proximity sensors, position sensors, presence sensors, and/or communication modules in order to assess the environment for the safety of the child. It also includes a controller that can apply a brake to the wheel assembly to stop or substantially slow the baby walker so as to protect the baby from entering dangerous regions or come in close proximity to objects. The baby walker may further receive and/or transmit information from an external device which may be operated by the child's guardian to define the borders of dangerous regions or a predefined travel distance.

A caster wheel that locks and unlocks using a push-lock, push-unlock mechanism, similar to a push button pen. The mechanism can be placed on the side of the wheel to be easily accessible to the user and to allow a convenient locking of the caster wheel.

A caster wheel that locks and unlocks using a push-lock, push-unlock mechanism, similar to a push button pen. The mechanism can be placed on the side of the wheel to be easily accessible to the user and to allow a convenient locking of the caster wheel.

Provided is an ultrasound diagnostic apparatus including a plurality of casters allowing the ultrasound diagnostic apparatus to be moved according to a control signal, a detection sensor configured to detect a motion of the ultrasound diagnostic apparatus, an input configured to receive a control command of the ultrasound diagnostic apparatus from a user, and a controller configured to determine whether a user desires to use the ultrasound diagnostic apparatus on the basis of at least one of the detected motion or the received control command, and upon determining that the user desires to use the ultrasound diagnostic apparatus, transmit a control signal for locking at least one of the plurality of casters.

A baby walker comprises sensors and control mechanisms to detect dangerous situations and to stop or substantially slow the baby walker. The baby walker uses proximity sensors, position sensors, presence sensors, and/or communication modules in order to assess the environment for the safety of the child. It also includes a controller that can apply a brake to the wheel assembly to stop or substantially slow the baby walker so as to protect the baby from entering dangerous regions or come in close proximity to objects. The baby walker may further receive and/or transmit information from an external device which may be operated by the child's guardian to define the borders of dangerous regions or a predefined travel distance.

Systems and methods for facilitating movement of a patient transport apparatus. The patient transport apparatus has a support structure and a patient support surface. Caster assemblies are coupled to the support structure to roll about a roll axis and swivel about a swivel axis. A control system is configured to control brake mechanisms, steer-lock mechanisms, and pre-swivel mechanisms of the caster assemblies based on one or more inputs.