Abstract: An oxygen-compression apparatus has a driving device, multiple rotating wheels, multiple driving rings, multiple rocking cylinders and multiple connecting hoses. The driving device has a driving shaft with a central axis. The rotating wheels are eccentrically attached on and rotated with the driving shaft and are located respectively at different angles relative to the central axis of the driving shaft. The driving rings are rotatably mounted respectively around the rotating wheels. The rocking cylinders are connected respectively to the driving rings and each has a housing and a piston rod. The piston rod has a first end extending into the inner space of the housing to form a compression chamber in the inner space and a second end pivotally connected to a corresponding one of the driving rings. The connecting hoses are connected between the compression chambers of adjacent rocking cylinders.

Abstract: A stable wheel assembly has wheels, a connector, a wheel stand with a bracket and a resilient body. Each wheel has a center. The connector has two spindles and two protrusions. Each protrusion has a free end and an upright step integrally formed with the free end of the protrusion. The upright steps on the protrusions are mated with each other. The bracket is pivotally mounted on two protrusions with a fastener. When the scooter or electric motorcycle mounted the stable wheel assembly run on an uneven surface, the wheels is raised up and the protrusion connected to the raised wheels is pivoted around the fastener mounted inside the protrusion and bracket. Therefore, a scooter or an electric motorcycle with the stable wheel assembly can be prevented from turning over.

Abstract: A cargo lift for a vehicle has a motor, an upper stanchion, a lower stanchion, a platform, a platform bracket, a roller bracket, a mounting bracket, a wing and a platform storage device. The motor is connected to the upper stanchion, and the lower stanchion is mounted inside the upper stanchion. The wing is formed on the upper stanchion, and the mounting bracket is pivotally attached to the wing. The platform bracket is pivotally mounted on the lower stanchion, and the platform is attached to the platform bracket. The platform storage device mounted on the wing has an actuating arm and a spring-loaded holder. The spring-loaded holder has a compressed spring mounted inside a cylinder. When the cargo lift is assembled, the compressed spring mounted inside the cylinder prevents the compressed spring from releasing and injuring anyone. Furthermore, the cargo lift has a beautiful external appearance.

Abstract: A shock absorber is installed in a power wheelchair to absorb shocks transmitted from rear wheels of the power wheelchair. The shock absorber includes a bracket, a seat and a suspension device. The suspension device is installed between the bracket and the seat and includes two suspension springs. Each suspension spring has a different spring stiffness. The seat is pivotally connected to the bracket at a pivot point between the two suspension springs. Consequently, the suspension springs will balance absorbing shocks caused by bumps while the power wheelchair is moving.

Abstract: A battery compartment for a motorized wheel chair includes a first securing bracket adapted to be securely connected to a side bracket of the motorized wheel chair, and a second securing bracket adapted to be securely connected to the side bracket of the motorized wheel chair and being opposite to the first securing bracket. A U-shaped first frame is pivotally connected to the first securing bracket. A U-shaped second frame is pivotally connected to the second securing bracket and to the first frame.

Abstract: A steering assembly for an electrical scooter has a base, a connecting tube, a front steering bar, a rear steering bar, a positioning device, a frame and a handle. The front steering bar and the rear steering bar are pivotally attached to the top of the base. The positioning device is pivotally mounted between the front steering bar and the rear steering bar to keep the front steering bar and the rear steering from pivoting relative to the base. The frame is pivotally connected to the top of the front steering and the top of the rear steering bar. A headlight is attached to the frame. The front steering bar has a length longer than that of the rear steering bar. Accordingly, the steering assembly is adjustable, and the projecting angle of the light can be controlled to a desired range.

Abstract: A battery compartment for a motorized wheel chair includes a first securing bracket adapted to be securely connected to a side bracket of the motorized wheel chair, and a second securing bracket adapted to be securely connected to the side bracket of the motorized wheel chair and being opposite to the first securing bracket. A U shaped first frame is pivotally connected to the first securing bracket. A U shaped second frame is pivotally connected to the second securing bracket and to the first frame.

Abstract: A terminal device secured between an electromobile and a battery container (50) consists of a body terminal contact (20) and a container terminal contact (40). The body terminal contact (20) is attached to the electromobile, and the container terminal contact (40) is attached to a cap (30) formed in the battery container (50) to conductively abut the body terminal contact (20) directly when the battery container (50) is mounted in the electromobile. Thereby, the battery container (50) can be quickly and easily attached to or detached from the electromobile.

Abstract: A steering assembly for an electrical scooter has a base, a connecting tube, a front steering bar, a rear steering bar, a positioning device, a frame and a handle. The front steering bar and the rear steering bar are pivotally attached to the top of the base. The positioning device is pivotally mounted between the front steering bar and the rear steering bar to keep the front steering bar and the rear steering from pivoting relative to the base. The frame is pivotally connected to the top of the front steering and the top of the rear steering bar. A headlight is attached to the frame. The front steering bar has a length longer than that of the rear steering bar. Accordingly, the steering assembly is adjustable, and the projecting angle of the light can be controlled to a desired range.

Abstract: A safety brake type rollator which is normally in detained state, but it starts to advance when releasing grips installed on both handle bars are gripped, is disclosed. The elaborate utilization of lever principle associated with power transmission between two ratchet wheels realizes innovative effect of the present invention.

Abstract: The present invention provides a chart chassis composed of a front and a rear cart frameworks bridged together, while the releasing and assembling mechanism comprises a handle bar, a turnable member and a joint assembly. By pulling the handle bar to turn the turnable member outwards, and separating the joint assembly from the turnable member thereby performing instant detachment of the cart chassis.

Abstract: Horizontal swivelling angle positioning device for a chair is disclosed. The structure consists of an axle bush with a positioning ring having a plurality of positioning slots formed radially thereof being attached to a main frame of the chair. An axle is inserted in the axle bush and sustained thereon so as to integrally engage the main frame and the chair seat. A control lever is provided to interconnect two flanks formed on the axle and sandwiches a filler block therebetween. The filler block is further locked to the control lever by a set screw so that the two components are integrally combined to turn together. A spring disposed between a stationary substrate of the chair seat and a protruded tooth of the filler block. The protruded tooth is used to be inserted into one of the positioning slots and clogged thereof by the spring so as to keep the chair in a predetermined horizontal swivelling angle.