A patient transport apparatus transports a patient over a floor surface. The patient transport apparatus comprises a support structure and support wheels coupled to the support structure. An auxiliary wheel is coupled to the support frame to influence motion of the patient transport apparatus over a floor surface. The auxiliary wheel is movable to a deployed position with the auxiliary wheel engaging the floor surface and a stowed position with the auxiliary wheel spaced a distance from the floor surface. An actuator assembly including a lift actuator a biasing device, and a biasing load adjustment assembly. The lift actuator is operable to move the auxiliary wheel to the deployed position and to the stowed position. The biasing device configured to bias the auxiliary wheel towards the deployed position. The biasing load adjustment assembly configured to adjust a biasing force being applied by the biasing device to the auxiliary wheel.

An anti-oscillation mechanism is provided for a caster wheel assembly of a ride-on vehicle. The anti-oscillating mechanism has a stop, a first cap, a second cap and a bias member. The stop is positioned within the frame of the ride-on vehicle. The first cap has a wall that abuts the stop. The second cap has a wall that abuts a stem of the caster wheel assembly. The bias member has a first end that engages the first cap, and a second end that engages the second cap. The bias member exerts a force on the second cap, which exerts a force on the stem to push the caster wheel assembly toward a ground to help prevent a wheel of the caster wheel assembly from lifting off the ground.

A patient support apparatus comprises a base supported by caster assemblies with each caster assembly comprising a stem, a caster wheel, and a caster wheel axle. A patient support surface is coupled to the base and is configured to receive a load. One or more load sensors are integrated with at least one of the stem, the caster wheel, or the caster wheel axle for measuring the load. One or more of the caster assemblies can be coupled to a steering motor, which controls orientation of the caster assembly. A controller can control the steering motors based on analyzing the measurements of the load sensor. The load sensors can produce measurements indicative of both vertical load and non-vertical load applied to the caster assembly. The controller can also analyze the measurements of the load sensor to determine the load received by the patient support surface by negating the non-vertical load.

A mobility vehicle may comprise a frame, a first pivot arm, a second pivot arm, and a suspension assembly. The first pivot arm may be coupled to the frame and coupled to a drive wheel. The second pivot arm may be coupled to the frame and coupled to a ground engaging caster wheel. The suspension assembly may be coupled to the frame. The suspension assembly may include a first spring assembly and a second spring assembly. The first spring assembly may be disposed about a first spring axis and coupled to the first pivot arm. The second spring assembly may be disposed about a second spring axis and coupled to the second pivot arm. The first spring axis and the second spring axis may be disposed relative to each other at an angle of no greater than about 150° when the mobility vehicle is operating on horizontal ground.

The present invention provides one or more carrier devices capable of varying contact damping with pressured displacement. The device is configured to be installed on mechanical force-receiving structures that have rolling wheels, rolling balls or slidably displaceable terminal block structure, carrying devices and transportation devices for humans or objects. When receiving pressure smaller than a set value, the device provides low contact damping and is thus easy to move. On the other hand, when receiving pressure greater than the set value, it provides high contact damping so as to prevent slip and thereby ensure safe placement.

In addition, when receiving pressure smaller than the set value, the device has its pre-stressed structure generate modulation to displacement corresponding to the size of the pressure it receives for the purpose of shock absorbency.

An article movement system includes an article and at least one ball wheel. The article has first and second article surfaces meeting at a first article edge. The ball wheel is located along the first article edge and includes a ball, a bearing arrangement and a shell. The ball engages a surface underlying the article, the bearing arrangement supports the ball for omni-directional rotational movement, and the shell is located along the first article edge and contains the ball and the bearing arrangement. The shell defines a non-circular ball opening through which a portion of the ball extends to contact the underlying surface. The article, the bearing arrangement and the shell are configured such that the ball wheel is able to support the article for omni-directional rolling motion over the underlying surface with either of the first and article surfaces parallel thereto, and at any orientation therebetween.

A medical cart for use in patient care is provided, the medical cart comprising: a front; a back; sides; four legs which have a distal end, a proximal end and a bore at least partially therebetween terminating in an aperture at the proximal end; a spring plunger mounted on each leg for releasably retaining a pole in the bore; a bracket attached to each leg proximate to the distal end; a caster rotatably attached to each bracket; a lower shelf attached to the legs and extending between the legs; a ballast sleeve below the lower shelf for releasably retaining weight plates; and an upper shelf attached to the legs and extending between the legs, the upper shelf including a recess at the front extending towards the back.

A caster capable of removing a foreign substance includes a flange mounted to a carrier or a plate on which cargo is loaded so as to be spaced apart from a lower surface of the carrier or the plate, the flange having a plurality of coupling holes formed therein, a rotator rotatably mounted to a lower surface of the flange, lower support members mounted respectively to opposite sides of the rotator, each lower support member having a rotating shaft coupling hole formed in a lower portion thereof, a wheel located between the lower support members and supported by a rotating shaft, which penetrates the rotating shaft coupling hole, and a foreign substance removal device fixed to and supported by the rotating shaft, the foreign substance removal device serving to remove and collect the foreign substance attached to a surface of the wheel that is being rotated.

A universal rotating module is provided. The universal rotating module comprises a suspension carrier, a top cover, a globular element, and a plurality of cushion members. The suspension carrier includes a through hole and a plurality of first fixing portions beside the through hole. The top cover includes a plurality of second fixing portions. The globular element is disposed between the suspension carrier and the top cover. A portion of the globular element passes through the through hole. Each of the cushion members is correspondingly connected with the first fixing portion and the second fixing portion.

Provided is a trolley bag with separated middle frame structure and hinge and having shock-absorbing structure, which includes a trolley handle, a rear case, a middle frame, and a front case. The middle frame structure includes a hinge structure and a pair of middle frames. One of the pair of middle frames is connected to the rear case, and the other one is connected to the front case. The hinge structure includes a pair of hinges and a core pin, one of the pair of hinges is connected to one of the middle frames, the other is connected to the other one of the middle frames. The pair of hinges are movably connected through the core pin. The pair of middle frames is locked together by an interlocking assembly. Shock-absorbing wheels are arranged at four corners of a bottom of the trolley bag.