In some examples, a ski bike includes a frame, a steering mechanism rotatably coupled to the frame, a ski, and a ski retention system. The ski retention system rotatably couples the ski to the frame or the steering mechanism. The ski retention system includes a ski bracket and a fixed member. The ski bracket is rigidly coupled to the ski. The fixed member is rigidly coupled to the frame or the steering mechanism and rotatably coupled to the ski bracket.

A hydraulic shock absorbing apparatus for a vehicle includes left and right front wheels, left and right arms, and hydraulic shock absorbers provided between a vehicle body and the left and right arms. A first end portion of each hydraulic shock absorber includes a cylinder main body partitioned into a first oil chamber and a second oil chamber by a piston. A second end portion of the hydraulic shock absorber includes a piston rod including the piston. A reserve tank is connected to one hydraulic shock absorber via a first hydraulic oil passage and connected to the other hydraulic shock absorber via a second hydraulic oil passage. The first hydraulic oil passage and the second hydraulic oil passage are individually connected to a third oil chamber of the reserve tank.

A skiing apparatus including a lower seat member, a lower frame member, a ski attachment member, and upper shock absorbing connector member, a lower shock absorbing connector member, and a lower storage member. The lower frame member may connect to the lower seat member. The ski attachment member may connect to the lower frame member and be adapted to be detachably connected to a ski. The upper shock absorbing connector member may connect to the lower seat member. The lower shock absorbing connector member may connect to the lower frame member. The lower storage member may connect to the lower seat member.

A surface walker for human beings consisting of a chassis holding four articulated, movable limbs for walking. Each limb rests on foot, ski or float. Chassis is topped with cushioned seat whereon user lies prone on chest and belly with access to limbs, which are activated with arms and legs. Chassis height and limb length are adjustable. User regulates walking gait, limb stride and motion frequency of limbs. Walker advances on land and water and diverse landscapes. Design incorporates optional computer-controlled power assistance for walker motion and use of mechanical hand for enhanced traction and anchoring effects.

A skiing apparatus including a lower seat member, a lower frame member, a ski attachment member, and upper shock absorbing connector member, a lower shock absorbing connector member, and a lower storage member. The lower frame member may connect to the lower seat member. The ski attachment member may connect to the lower frame member and be adapted to be detachably connected to a ski. The upper shock absorbing connector member may connect to the lower seat member. The lower shock absorbing connector member may connect to the lower frame member. The lower storage member may connect to the lower seat member.

An apparatus for a kicksled with a detachable trailer may include a pair of runners, including a first runner and a second runner that are oriented parallel to each other. The apparatus may include a first cross member, including a first end and a second end where the first end is disposed on the first runner, and the second end is disposed on the second runner. The apparatus may include a pair of trailer attachment arms to which a trailer may be detachably connectable. The trailer may be able to hold a child or small pet. The apparatus may include a pair of riding platform disposed on the pair of runners. The user may push the apparatus from behind and may ride on the riding platforms when the apparatus reaches a gliding speed.