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US 8,998,224 B2Granted
Scooter
AssigneeRexco Industrial Ltd.
InventorChun Kit Ngai
Life of this patent
Estimating the term…
Abstract
A scooter includes a footboard, a steering column having an upper end connected to a handlebar and a lower end connected to a front fork, a head-tube frame assembly having a head tube coupled to the steering column and a frame assembly coupled to the footboard, a front ball bearing wheel rotatably mounted to the front fork, and a rear ball bearing wheel rotatably mounted to a rear fork the footboard. The scooter further includes a folding mechanism in the head-tube frame assembly for folding up the scooter.
Claims13
A scooter comprising:
- (a) a footboard on which a rider can stand;
- (b) a steering column having an upper end connected to a handlebar and a lower end connected to a front fork;
- (c) a head-tube frame assembly having a head tube in which the lower end of the steering column is rotatably received, and a frame assembly coupled to a front end of the footboard;
- (d) a front wheel rotatably mounted to the front fork;
- and
- (e) a rear wheel rotatably mounted to a rear fork provided at a rear end of the footboard;
- (f) wherein each of the front and rear wheels is in the form of a ball bearing wheel;
- wherein each ball bearing wheel comprises:
- an outer ring having an annular raceway formed on an inner surface thereof;
- an inner ring having an annular raceway formed on an outer surface thereof, the annular raceways facing each other and defining an annular space;
- a plurality of bearing balls rotatably disposed around the annular space;
- and
- a ball-separating ring formed with a plurality of circumferentially spaced apart ball-retaining pockets for retaining therein the plurality of bearing balls respectively;
- and
- wherein the outer ring comprises an outer ground-engaging ring portion and an inner ball-engaging ring portion formed on an inner surface of the outer ground-engaging ring portion.
12 more elements
A scooter comprising:
- (a) a footboard on which a rider can stand;
- (b) a steering column having an upper end connected to a handlebar and a lower end connected to a front fork;
- (c) a head-tube frame assembly having a head tube in which the lower end of the steering column is rotatably received, and a frame assembly coupled to a front end of the footboard;
- (d) a front ball bearing wheel rotatably mounted to the front fork;
- (e) a rear ball bearing wheel rotatably mounted to a rear fork provided at a rear end of the footboard;
- (f) two parallel arms having upper ends fixed to the head tube and lower ends pivotally coupled to a pivot pin provided on an upper surface of the footboard at the front end thereof;
- (g) a tubular casing adapted to receive the two arms therethrough, two opposite projections being formed on two opposite outer walls of the tubular casing respectively;
- (h) a spring having an upper end connected to the upper ends of the arms and a lower end connected to a lower end of the tubular casing;
- and
- (i) two vertical walls formed on an upper surface of the footboard at the front end thereof, the two vertical walls having two upper curved edges formed thereon with two opposite front slots and two opposite rear slots respectively;
- (j) whereby the two arms can be moved from an unfolded and locked position where the two opposite projections are inserted and biased by the spring into the two opposite front slots respectively, and whereby pulling the tubular casing against the biasing force of the spring releases the two opposite projections from the two opposite front slots and allows the two arms to pivot about the pivot pin from the unfolded position, towards the footboard and to a folded and locked position where the two projections are inserted and biased by the spring into the two opposite rear slots respectively;
- wherein each of the front and rear ball bearing rings comprises:
- an outer ring having an annular raceway formed on an inner surface thereof;
- an inner ring having an annular raceway formed on an outer surface thereof, the annular raceways facing each other and defining an annular space;
- a plurality of bearing balls rotatably disposed around the annular space;
- and
- a ball-separating ring formed with a plurality of circumferentially spaced apart ball-retaining pockets for retaining therein the plurality of bearing balls respectively;
- and
- wherein the outer ring comprises an outer ground-engaging ring portion and an inner ball-engaging ring portion formed on an inner surface of the outer ground-engaging ring portion.
16 more elements
Dependencies are inferred from the claim text.