A bladder formed inside or positioned on a seat accounts for variations in personal anatomy with changes in the configurations of multiple chambers in the bladder and may also allow for changes to the constriction between the chambers in the bladder. The bladder forms a cushioning device that is used for seating applications which involve movement and continuously changes softness between the chambers by using the movement of the rider. Rider movement results in the interchange of pressures through variable-sized orifices between variable-displacement chambers. The number and size of the chambers can be varied according to a desired seating configuration. The orifice size can be changed with a variable constriction mechanism. Different fastening configurations can change the number and shape of the chambers. The cushioning device can be used in retrofitting existing seats and can be produced in new seats.

Provided is a thin collapsible two-wheeled vehicle including: a pair of left and right mounting members provided to the main body frame to mount the rear wheel; wherein the pair of mounting members are each provided with a through hole penetrating each of the pair of mounting members respectively in left and right directions of the mounting members; the main body frame has a storage room therein, the storage room capable of storing the front wheel, the rear wheel, the saddle, and the handle; the rear wheel has an axle capable of moving within the through hole between a first mounting position and second mounting position; the rear wheel protrudes from the main body frame when the axle is mounted at the first mounting position, and the rear wheel is stored in the main body frame when the axle is mounted at the second mounting position.

An adjustable seat assembly for a tilting vehicle includes a seat pan configured to be secured in a fixed position with respect to a frame of the tilting vehicle, at least one cushion unit arranged on the seat pan and forming a seat surface, and at least one adjustment device by which the seat surface is transferable from a low seat position into at least one raised seat position. In addition or alternatively, the at least one adjusting device may alter an inclination of the seat surface relative to the seat pan. The cushion unit has at least one base cushion secured in a fixed position on the seat pan, and at least one adjustable cushion which is movable relative to the base cushion by the adjustment device.

An adjustable seat assembly for a tilting vehicle includes a seat pan configured to be secured in a fixed position with respect to a frame of the tilting vehicle, at least one cushion unit arranged on the seat pan and forming a seat surface, and at least one adjustment device by which the seat surface is transferable from a low seat position into at least one raised seat position. In addition or alternatively, the at least one adjusting device may alter an inclination of the seat surface relative to the seat pan. The cushion unit has at least one base cushion secured in a fixed position on the seat pan, and at least one adjustable cushion which is movable relative to the base cushion by the adjustment device.

An adjustable seat assembly for a motorcycle includes a seat pan with a first portion and a second portion, and an adjustment mechanism. The first portion of the seat pan has a fastening portion for the non-adjustable fastening of the first portion on the motorcycle, preferably on a tank of the motorcycle. The adjustment mechanism is connected to the second portion of the seat pan and is configured to adjust the height and/or inclination of the second portion of the seat pan in relation to the first portion. A motorcycle with the adjustable seat assembly is also provided.

An adjustable seat assembly for a motorcycle includes a seat pan with a first portion and a second portion, and an adjustment mechanism. The first portion of the seat pan has a fastening portion for the non-adjustable fastening of the first portion on the motorcycle, preferably on a tank of the motorcycle. The adjustment mechanism is connected to the second portion of the seat pan and is configured to adjust the height and/or inclination of the second portion of the seat pan in relation to the first portion. A motorcycle with the adjustable seat assembly is also provided.

An adjustable seat assembly for a motorcycle includes a seat pan having a base shell, an adjustable shell, and an adjustment mechanism between the base shell and the adjustable shell. The base shell has a fastening portion for non-adjustable fastening of the base shell on the motorcycle. The adjustable shell is placed on the base shell and are connected via the adjustment mechanism. The adjustment mechanism is configured to adjust the height and/or inclination of the adjustable shell in relation to the base shell. A motorcycle having the adjustable seat assembly is also provided.

An adjustable seat assembly for a motorcycle includes a seat pan having a base shell, an adjustable shell, and an adjustment mechanism between the base shell and the adjustable shell. The base shell has a fastening portion for non-adjustable fastening of the base shell on the motorcycle. The adjustable shell is placed on the base shell and are connected via the adjustment mechanism. The adjustment mechanism is configured to adjust the height and/or inclination of the adjustable shell in relation to the base shell. A motorcycle having the adjustable seat assembly is also provided.

A multi-degree-of-freedom riding saddle includes a support portion connected to a bicycle frame. A mechanical linkage may connect a first and a second seat plate to the support portion, such that the first and second seat plates each define a floating link of the mechanical linkage. A respective first connecting rod is coupled to a front end of each seat plate, and a respective second connecting rod is coupled to a rear end of each seat plate. A first swing cross rod connects the first connecting rods such that a lowering of a front end of one of the seat plates causes a front end of the other seat plate to rise. A second swing cross rod connects the second connecting rods such that a lowering of a rear end of one of the seat plates causes a rear end of the other seat plate to rise.

A multi-degree-of-freedom riding saddle includes a support portion connected to a bicycle frame. A mechanical linkage may connect a first and a second seat plate to the support portion, such that the first and second seat plates each define a floating link of the mechanical linkage. A respective first connecting rod is coupled to a front end of each seat plate, and a respective second connecting rod is coupled to a rear end of each seat plate. A first swing cross rod connects the first connecting rods such that a lowering of a front end of one of the seat plates causes a front end of the other seat plate to rise. A second swing cross rod connects the second connecting rods such that a lowering of a rear end of one of the seat plates causes a rear end of the other seat plate to rise.