An auxiliary drive device for a wheelchair has at least one electrically driven drive wheel and a coupling mechanism for coupling the auxiliary drive device to the wheelchair. The electrically driven drive wheel is supported at a steering shaft and freely pivotable with respect to the auxiliary drive device. The steering shaft is arranged such that, when the auxiliary drive device is coupled at a wheelchair ready to be operated, a castor is provided for the electrically driven drive wheel.

A dual-state caster apparatus having a caster head with a state-change pivot configured to change the steering axis of the caster apparatus. A braking system with a brake control cable is incorporated into the caster apparatus wherein the state-change pivot and the braking system are configured to allow a wheel to swivel without interference with the brake control cable.

A work vehicle includes a chassis; a primary wheel carried by the chassis; and a caster assembly carried by the chassis. The caster assembly includes a pivotable swivel structure defining a caster angle; and a caster wheel swivelly linked to the swivel structure and defining a wheelbase relative to the primary wheel. A change in the wheelbase passively causes the swivel structure to pivot and change the caster angle.

The caster wheel support assembly has a first section securable to a frame member of a wheelchair and a second section holding a swivel member coupled to a caster wheel. The caster wheel support assembly has a holding member designed as a collet configured to hold a first portion of the swivel member which extends along a first axis. A second portion of the swivel member, which is coupled to the caster wheel, extends away from the first portion along a second axis which forms an angle relative to the first axis. The first portion of the swivel member is supported by the holding member to selectively allow rotation thereof relative to the holding member about the first axis, causing adjustment of a camber of the caster wheel. The collet is configured to selectively prevent or permit rotation of the swivel member relative to the holding member.

The present disclosure relates to a caster wheel assembly (1), comprising: a caster housing (3) provided with an axial channel, a spindle shaft (7) configured to be received by the channel of the caster housing (3), which spindle shaft (7) is inclined relative to the vertical plane when mounted in the caster housing (3) and the caster wheel assembly (1) is in use resting on a horizontal support, the caster housing (3) and the spindle shaft (7) being configured to rotate freely relative to each other, a caster wheel fork (9) having a wheel axle (11) configured to be arranged offset relative to a central axis of the spindle shaft (7), to provide a trail functionality, and a height adjustment mechanism (6) configured to adjust an axial position of the spindle shaft (7) relative to the caster housing (3) based on a rotational position of the spindle shaft (7) in relation to the caster housing (3).

A skateboard includes a board body having a first section and a second section, at least a first wheel set connected to the first section, and at least two second wheel sets connected to the second section. The first wheel set includes a first base protruding from the first section. Each second wheel set includes a second base protruding from the second section and defines a reference line passing through a center of the second base. Both of the bases slope at an angle of 5 to 35 degrees respectively. An angle of not more than 60 degrees is formed between the reference line and a baseline passing axially through a center of the board body. The skateboard moves forward when the wheel sets are triggered by twisting a body of a user and a moving direction is changeable by shifting a center of gravity of the user.

A skateboard includes a board body having a first section and a second section, at least a first wheel set connected to the first section, and at least two second wheel sets connected to the second section. The first wheel set includes a first base protruding from the first section. Each second wheel set includes a second base protruding from the second section and defines a reference line passing through a center of the second base. Both of the bases slope at an angle of 5 to 35 degrees respectively. An angle of not more than 60 degrees is formed between the reference line and a baseline passing axially through a center of the board body. The skateboard moves forward when the wheel sets are triggered by twisting a body of a user and a moving direction is changeable by shifting a center of gravity of the user.

An auxiliary drive device for a wheelchair has at least one electrically driven drive wheel and a coupling mechanism for coupling the auxiliary drive device to the wheelchair. The electrically driven drive wheel is supported at a steering shaft and freely pivotable with respect to the auxiliary drive device. The steering shaft is arranged such that, when the auxiliary drive device is coupled at a wheelchair ready to be operated, a castor is provided for the electrically driven drive wheel.

There is described a caster wheel support assembly for a wheelchair, the caster wheel support assembly having a first section configured to be securable to a frame member of the wheelchair and a second section configured to hold a swivel member coupled to a caster wheel. The caster wheel support assembly has a holding member designed as a collet configured to hold a first portion of the swivel member, in which first portion extends along a first axis. A second portion of the swivel member, which is coupled to the caster wheel, extends away from the first portion along a second axis, in which second axis forms an angle relative to the first axis. The holding member and swivel member are configured such that the first portion of the swivel member is supported by the holding member to selectively allow rotation of the swivel member relative to the holding member about the first axis and thereby cause adjustment of a camber of the caster wheel. The collet is configured to selectively allow clamping of the swivel member onto the holding member, thereby preventing rotation of the swivel member relative to the holding member, and release of the swivel member with respect to the holding member, thereby permitting rotation of the swivel member relative to the holding member.

A dual-state caster apparatus having a caster head with a state-change pivot configured to change the steering axis of the caster apparatus. A braking system with a brake control cable is incorporated into the caster apparatus wherein the state-change pivot and the braking system are configured to allow a wheel to swivel without interference with the brake control cable.