An automatic braking device for a manually propelled vehicle such as a standard wheelchair. The device is configured to substantially lock the wheel thus preventing the vehicle from rolling backwards when the occupantwhile attempting to exit the vehiclefor example forgets to lock a standard brake of the vehicle, thereby preventing the sometimes-serious fall of the occupant. The impeding of the backward rotation of the wheel and/or substantially preventing of the wheel from so rotating is carried out with the use of a flexible leg of the brake pad, repositionable with respect to the stationary plate of the brake pad during the wheel rotation. The device is cooperated with the wheel of the vehicle to not interfere with the intentional movement of the wheelchair in any direction, nor does it interfere with the typical locking mechanism of the standard wheelchair.

A gravity reactive braking system comprises a housing connected to a structural element of a manually powered wheeled unit; a guide wheel having a first sector of radially protruding elements positionable in drivable contact with a main wheel periphery, and a second sector with a circular periphery of a shorter radial length than the first sector; a plate configured with a cammed surface; a height adjustment unit; and a follower element connected to a brake assembly cable and pivotably mounted onto the housing, for movably engaging a plate periphery. The guide wheel is rotatable in a rotational direction opposite to the main wheel's rotational direction when the radially protruding elements are positioned in drivable contact with the main wheel periphery following suitable manipulation of the height adjustment unit, and is indexable a predetermined angle until a desired region of the guide wheel is in contact with the main wheel periphery.

A manual movable body with wheels 10 which can be moved by manually rotating the wheels, comprising an upper body frame 12 supporting a heavy goods, a pair of travelling wheels 18, each of which is provided on the corresponding side of a lower body frame 14 which is not in contact with upper body frame 12, and is rotationally supported by a first horizontal rotation shaft 16 extending in the widthwise direction of the lower body frame 14, and a pair of abutting rollers, each of which is mounted on upper body frame 12, and is rotationally supported by a second horizontal rotation shaft extending in the widthwise direction of the upper body frame 12.

A wheelchair anti-rollback device utilizes one-way roller clutches which incorporate a selectable free-rotation functionality such that the wheelchair user can select between anti-rollback and free-wheeling modes. The anti-rollback mode is of utility when the wheelchair user is propelling up ramps. The modal selection is by means of a knob positioned on the centerline rotation axis of the mechanism. The mechanism also included functionality that allows mode change from anti-rollback to free-wheeling to be made at any time, including while the chair is on an inclined ramp. The invention can incorporated into the hub of the rear wheels of a wheelchair or into the toggle mechanism of typically used to actuate parking brakes. When incorporated into a wheelchair, the invention gives the wheelchair user greater control and ease in ascending ramps.

A self-balancing vehicle comprising two axially spaced wheels (3, 4) mounted on a main body (2), an electric drive coupled to at least one wheel (3, 4), control means adapted to maintain the vehicle in balance by controlling the drive, a receptable for carrying and conveying a load, the vehicle having an adjustment mechanism (7) for linear displacement of the receptable arranged so that the receptable is adjustable by the linear displacement both along the longitudinal axis and along the vertical axis of the vehicle.

A gravity reactive braking system comprises a housing connected to a structural element of a manually powered wheeled unit; a guide wheel having a first sector of radially protruding elements positionable in drivable contact with a main wheel periphery, and a second sector with a circular periphery of a shorter radial length than the first sector; a plate configured with a cammed surface; a height adjustment unit; and a follower element connected to a brake assembly cable and pivotably mounted onto the housing, for movably engaging a plate periphery. The guide wheel is rotatable in a rotational direction opposite to the main wheel's rotational direction when the radially protruding elements are positioned in drivable contact with the main wheel periphery following suitable manipulation of the height adjustment unit, and is indexable a predetermined angle until a desired region of the guide wheel is in contact with the main wheel periphery.

A wheel assembly comprising a wheelchair wheel (5) and a backstop arrangement (10; 30; 70) configured to selectively engage and disengage a backstop function and comprising a backstop selector (15; 35; 75) and a backstop member (18; 38; 78), wherein the wheel (5) comprises an internal-gear wheel hub (11; 31; 71) comprising a number of internal gears (57, 58) and having an inner rotatable circumferential surface (13; 33; 73), and wherein the backstop member is configured to allow the inner circumferential surface to rotate in one direction and to prevent rotation in the opposite direction. The wheel assembly comprises further a gear-shift arrangement comprising a shift member (54), which is axially moveable within the internal-gear hub (31) to engage a specific gear of said number of internal gears (57, 58), and wherein the shift member (54) via a connector member (55) is operatively connected to the backstop selector.

The collapsible lovemaking apparatus has an elongated housing having opposing ends. A floor, a top platform, opposing sidewalls, and a rigidly fixed end wall having a handle form the housing and define a hollow interior. A chair platform is slidably mounted on telescoping tubes attached to the floor, the platform being slidable out of the open housing end and supported at one end by wheels. An adjustable height pedestal chair is mounted on the platform, the chair back being rotatable 180 to define an end wall closing the open end of the housing. A second chair seat having a reclining chair back is mounted on a trolley on the top platform facing the adjustable height chair, the reclining back being collapsible to a flat position. The pedestal chair and the trolley-mounted chair seat may roll towards and away from each other to facilitate love making.

A handy type electric carriage comprises a vehicle body comprising a main vehicle frame, two driving wheels pivoted to the main vehicle frame at two sides, and two front wheel sets provided at two sides in front of the two driving wheels and pivoted to the main vehicle frame; and a footrest unit connected to the vehicle body, the footrest unit comprising a foot board connected to the main vehicle frame, and two first auxiliary wheels at left and right sides of the foot board. The main vehicle frame is situated in an unfolded or folded state due to a positioning mechanism. The front wheel sets and the main vehicle frame are pivoted in a manner of quick-release structure. Thereby, reduction in volume and easier to carry are provided for the handy type electric carriage, and providing easy and labor-saving shifting of the carriage is achieved.