Abstract: A seat and seatback linkage mechanism includes: a pipe, a side bracket assembly, a seat, a seatback and driving source. The side bracket assembly includes a first side bracket and a second side bracket, and the pipe is mounted on the first and second side brackets. The seat is disposed between the first and second side brackets and includes a bottom surface, the bottom surface includes two first connecting portions and two second connecting portions, and the first connecting portions are pivotally connected to the first and second side brackets, respectively. The seatback is disposed between the first and second side brackets and connected to the second connecting portions of the seat, so that the seatback and the seat are drivingly connected to each other. The driving source is connected to one end of the seatback that is adjacent to the pipe to drive the driven end to move.

Abstract: A trailer is provided for a helicopter. The trailer includes a chassis, at least two lifters provided on the chassis, at least two drivers provided on the chassis and connected to the lifters, at least two locks for locking the lifters in an upper position and a connector for connecting the chassis to a vehicle.

Abstract: A trailer is provided for a helicopter. The trailer includes a chassis, at least two lifters provided on the chassis, at least two drivers provided on the chassis and connected to the lifters, at least two locks for locking the lifters in an upper position and a connector for connecting the chassis to a vehicle.

Abstract: The present invention is a fall-prevention device for the backrest of a hospital bed, wherein fall-prevention devices are configured on both sides of the backrest rack which inclination angle can be adjusted. The fall-prevention device includes fall-prevention racks that are coupled to the both sides of the backrest rack of the hospital bed. The fall-prevention rack is located within the siderail and supported by a support member. The other end of the support member is activated by a linking rod that is pivotably connected to the siderail on one end and to the main bed frame on the other end. When the backrest rack is in flat position, the level distance between the linking rod and the backrest rack is the longest, thus the support member of the linking rod is unable to support the fall-prevention rack upward.

Abstract: A wheel chair includes wheel frames which can be adjusted up and down, moving devices and brake devices are connected to two respective sides of the two wheel frames. Support devices are connected to the wheel frames so as to adjust the depth of the wheel frames to which arm rest devices are connected. A folding device is connected between the wheel frames and an assistant device is connected to the folding device. A positioning device is connected to the assistant device so that the wheel chair can be adjusted in many ways to meet different needs of users. The modularized devices effectively reduce manufacturing cost of the wheel chair.

Abstract: A wheelchair includes a seat frame having two transverse support rods, a foldable sunk-type seat module mounted on the seat frame and located between the two transverse support rods, a backrest frame having two upright support rods, and a foldable sunk-type backrest module mounted on the backrest frame and located between the two upright support rods. Thus, the backrest module may be mounted on and detached from the upright support rods of the backrest frame easily, rapidly and conveniently, and the seat module may be mounted on and detached from the horizontal support rods of the seat frame easily, rapidly and conveniently.

Abstract: A modularized assembly structure of a wheelchair includes two upper transverse tubes and two lower transverse tubes mounted between a pair of sided front module connecting members and a pair of sided rear module connecting members, thereby forming the main frame of the wheelchair. The front wheel and the rear wheel may be respectively mounted on the upper and lower transverse tubes which may be set at different horizontal positions and different vertical heights, so that the distance between the front wheel and the rear wheel may be adjusted arbitrarily.

Abstract: An hydraulic ABS system for motorcycle is installed between the wheels and the corresponding braking levers. The system respectively includes two hydraulic circuits respectively comprised of a pressure increasing circuit and a pressure releasing circuit, and an electric control unit where a plurality of control zones are established. The front and rear wheel braking levers respectively provide two braking signals that separately or simultaneously control the respective braking forces of the front and rear wheels. Via calculated slip rates, the operation of pressure increasing and releasing circuits are further timely controlled to achieve an optimal braking.

Abstract: A wheel chair includes two side assemblies each include a back post with a hand grip, a seat bar connected to a lower end of the back post, an arm rest movably connected to the back post, a hanger bracket connected to a front end of the seat bar, a caster rotatably connected to a front end of the seat bar, and a rear wheel connected to a side of the side assembly. A connection device connects the back post and the arm rest, or the front end of the seat bar and the hanger bracket. The connection device has a C-shaped member fastened on the back post or the front end of the seat bar extends. A sleeve is connected to an outside of the C-shaped member and a first end of a connection tube is movably and rotatably received in the sleeve. A locking bolt extends through a close end of the sleeve and is threadedly connected to the first end of the connection tube. The arm rest or the hanger bracket is fixedly connected to a second end of the connection tube.