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US 2007/0175685 A1Published application
Chain driven scooter
OwnerHuann-Jong Tsernginventor
Life of this patent
Estimating the term…
Abstract
The chain driven scooter has a body, a return device, a drive device, an operating device and a blocking device. The body has a baseboard and a rear wheel frame. The return device is mounted under the baseboard and has a jacket, a connector and a chain spring. The chain spring is attached to the connector. The drive device is mounted between the rear wheel frame and the connector and has a guide sprocket, a coaster drive sprocket and a chain. The chain is reeved around the guide sprocket and the coaster drive sprocket and connected to the return device. The operating device is mounted pivotally over the rear wheel and is connected to and pulls the chain when the operating device is pivoted backward. The blocking device is mounted over the rear wheel and keeps the operating device from over-rotating.
Claims10
A chain driven scooter having
- a body having
- a baseboard being flat and having
- a top;
- and
- a bottom;
- a frame being U-shaped, attached to the bottom of the baseboard and having
- a closed front end;
- two rear ends;
- and
- a rear axle mounted removably between the two rear ends;
- a handlebar assembly connected pivotally to the frame and having
- a lower end;
- a handlebar connected pivotally to the closed front end of the frame;
- a fork connected to and turned by the handlebar;
- and
- a front wheel mounted rotatably in the fork;
- a rear wheel mounted rotatably on the rear axle between the rear ends of the frame and having
- a center;
- and
- a wheel hub being hollow, defined transversely through the center of the rear wheel and mounted rotatably on the axle between the rear ends of the frame;
- two guide brackets securely mounted respectively on the rear ends of the frame, and each guide bracket having
- an outer edge formed on the guide bracket opposite to the frame;
- and
- a notch formed in the outer edge of the guide bracket;
- two bracket caps attached respectively to the outer edges of the guide brackets, and each bracket cap having
- an inner edge;
- and
- a notch formed in the inner edge, corresponding to and communicated with the notch in the outer edge of a corresponding guide bracket and formed a through hole in cooperation with the notch in the corresponding guide bracket;
- a rear wheel frame being an inverted V-shape, connected to the frame near the rear ends, connected to the wheel hub of the rear wheel and having two sides;
- two return stops attached respectively to opposite sides of the rear wheel frame near the wheel hub;
- and
- a return device mounted on the bottom of the baseboard and having
- a jacket being tubular attached to the bottom of the baseboard and having
- a front end;
- an open rear end;
- two sides;
- a through hole extending transversely through the jacket near the front end;
- an anchor mounted in the through hole;
- and
- two through slots longitudinally formed respectively through the sides of the jacket and aligned with each other;
- a connector mounted slidably in the jacket and having
- a front end;
- a rear end;
- and
- a spring hole formed transversely through the connector near the front end;
- a chain spring mounted slidably in the jacket and having
- a front end attached securely to the anchor near the front end of the jacket;
- and
- a rear end attached securely to the spring hole in the connector;
- and
- a drive device mounted between the rear wheel frame and the connector and having
- a guide sprocket attached rotatably to the rear wheel frame and having
- a central through hole;
- and
- a mounting pin mounted through the central hole in the guide sprocket;
- a coaster drive sprocket mounted around the wheel hub and aligning with the guide sprocket and having a unidirectional bearing mounted between the wheel hub and the coaster drive sprocket;
- and
- a chain reeved around and engaged the guide sprocket and the coaster drive sprocket, connected to the return device and having
- a front end connected to the connector;
- and
- a rear end;
- an operating device mounted over the rear wheel and pivotally on the rear axle, connect to the chain and having
- a lever arm being U-shaped, mounted over the rear wheel and pivotally on the rear axle, connected to the rear end of the chain and having
- two lower ends;
- an upper end;
- a chain bracket attached to the lever arm, aligned with the guide sprocket and connected to the rear end of the chain;
- and
- a neck formed at and protruding forward from the upper end of the lever arm;
- two lever stops connected respectively to the lower ends of the lever arm and aligned with and abutting the return stops when the lever arm are pivoted, and each lever stop having
- a pivot hole formed through the lever stop, face the other pivot hole and mounted rotatably on the rear axle;
- and
- a protruding ear formed on and protruding perpendicular out from the lever stop;
- two mounting rings attached respectively to the protruding ears coaxially with the pivot holes and slidably mounted respectively through the through holes formed by the notches respectively in the guide brackets and the bracket caps;
- two lever springs mounted respectively around the mounting rings between the protruding ears and the guide brackets, compressed when the lever arm is pivoted;
- a push bar connected transversely to the neck of the lever arm;
- and
- a chain bracket mounted on the lever arm between the push bar and the lever stops and connected to the rear end of the chain near the guide sprocket;
- a blocking device being U-shaped, mounted on the rear axle to keep the operating device from over-rotating and having
- two connecting arms attached to the rear axle, and each connecting arm having
- a proximal end attached to the rear axle;
- and
- a distal end;
- and
- a positive stop connected to the distal ends of the connecting arms.
81 more elements
Dependencies are inferred from the claim text.