A caster wheel assembly for an outdoor power equipment machine includes a wheel mount and provides a double bell-shaped caster wheel including two bell-shaped halves, each bell-shaped half includes a central hub, a smooth transition portion, an outer circumferential rim, and a planar face. A ground contacting tread can be provided by the outer circumferential rims. A ground contacting tread can be provided by a resilient tread ring positioned between the two bell-shaped halves.

Particular embodiments disclosed herein provide a retractable guard assembly coupled to a caster of a mobile equipment, comprising a housing and one or more guards at least partially disposed in the housing. The one or more guards are independently movably coupled to the housing. The retractable guard assembly further comprises corresponding one or more biasing elements coupled to the one or more guards and to the housing for biasing the one or more guards towards a fully deployed state. When the one or more guards are in the fully deployed state, contact between a fixed object and a portion of the one or more guards disposed outside the housing causes the one or more guards to transition into a retracted state, and when the contact is removed, the corresponding one or more biasing elements cause the one or more guards to transition into the fully deployed state.

The invention provides a caster including two wheels, a central frame member, and a mount member. The two wheels are mounted on the mount member. The caster has a hybrid bearing arrangement comprising both a rolling bearing and two slide bearings. The rolling bearing is located between the central frame member and the mount member and is configured to enable the caster to roll along a straight line with each of the two wheels rotating in a common direction about a first axis. Each of the two slide bearings is located between the mount member and a tread portion of a respective one of the two wheels. The slide bearings are configured to enable the two wheels to simultaneously rotate in opposite directions when the caster swivels about a second axis orthogonal to the first axis. In some embodiments, the caster is a hubless caster.

A spinner wheel assembly for a luggage case is provided. The wheel assembly may include a housing, a support strut rotatably coupled to the housing about a spinner axis, and a plurality of wheels each rotatably coupled to the support strut about a wheel axis. Each wheel may rotate in a plane positioned at an angle to at least one other wheel. Each wheel may be coupled to the support strut in a spaced relationship thereto.

An articulating carriage for moving an object across a surface having a non-planar obstruction to allow movement of the object over the obstruction. The articulating carriage has a walking beam assembly that pivotally supports a pedestal to dispose a support surface thereof above the walking beam assembly. The walking beam assembly has a base plate, wheeled casters and a pair of spaced apart hangers having articulation openings. The walking beam pivots relative to the pedestal. In one embodiment, the pedestal is pivotally mounted on the walking beam assembly. In another embodiment, a pair of walking beam assemblies are connected with a crosstube that pivotally supports the pedestal. In another embodiment, a major crosstube assembly connects a pair of crosstubes to define a carriage having four walking beams. In yet another embodiment, a compound crosstube assembly connects pairs of major crosstube assemblies to define a carriage having eight walking beams.

A mobility device for moving an object across a surface having a non-planar obstruction to allow movement of the object over the obstruction. The mobility device has a walking wheel assembly and an attachment mechanism. The walking wheel assembly has at least two wheels and an offset camshaft. The offset camshaft has a lobe associated with each wheel. The lobes are in a non-linear relationship such that one wheel is a leading wheel and one wheel is a trailing wheel. The offset camshaft allows the leading and trailing wheels to pivot upward and downward independent of each other. The attachment mechanism attaches the walking wheel assembly to the object. The mobility device can include a deflector assembly having a pair of deflector arms that are pivotally connected to a cam-axle which is attached to the offset camshaft to help guide the mobility device over non-planar areas.

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.

The invention relates to a stand base (10) for microscopes, which encompasses a stand base body (12) on which multiple rollers (14 to 20) for displacing the stand base (10) are fastened. The stand base (10) furthermore has a braking system (40) to prevent displacement of the stand base (10), the braking system encompassing at least two braking feet (44, 46).

A stabilized luggage article is disclosed. In one practice, the luggage article comprises a plurality of swiveling wheel assemblies, each assembly comprising one or more wheels having a horizontal axis of rotation and mounted to a pivot member, such as a pivot post that has a vertical axis of wheel rotation; the vertical axis of rotation is laterally spaced from the horizontal axis of rotation and is projected outwardly toward the front wall of the luggage but not beyond it, the pivot post extending downwardly at least to the level of the horizontal axis of wheel rotation, preferably beyond it for further increased stability.

A coupling mechanism is provided for coupling a supporting element to a frame, and includes a base member and a C-shaped retainer. The frame includes a frame body and a leg member that has a leg body extending downwardly from the frame body to terminate at an enlarged leg end. The base member defines therein a recess for the enlarged leg end therein. The supporting element is coupled to a lower major surface of the base wall. The C-shaped retainer extends to be disposed about the leg body, and is configured to be detachably coupled to a surrounding wall of the base member for retaining the enlarged leg end in the recess.