US 5,474,314 AGranted

Coaster board

OwnerJames Lehmaninventor

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Abstract

A coaster board operable on irregular terrain includes a longitudinally elongated platform supported on a pair of spaced suspension and steering systems. Each suspension and steering system includes a suspension rod and a cooperative steering bar. Each suspension rod is resiliently attached to the platform near the lateral center of the platform and is supported on independently rotatable wheels mounted laterally exterior of the platform. Each suspension rod includes a laterally central orifice. A steering bar is fixedly attached to the platform. A steering bar segment extends downwardly from the platform through the suspension rod orifice and engages interior lateral sides of the orifice whereby rotation of the coaster board platform and the steering bar in a vertical plane about an axis parallel to the longitudinal axis of the platform exerts downward force on a side of each suspension rod.

Claims19

Dependent claims

A coaster board, comprising:

an elongated, generally planar platform having a longitudinal axis;
said platform supported on a first suspension member by first suspension connection means;
said platform supported on a second suspension member by second suspension connection means;
said first suspension member and said second suspension member each supported on axle means and wheels;
a first steering member and a second steering member each fixedly attached to said platform;
first engagement means engaging said first steering member with said first suspension member and second engagement means engaging said second steering member with said second suspension member, said first engagement means including a first central orifice in said first suspension member, said first steering member engaging lateral sides of said orifice, and said second engagement means including a second central orifice formed in said second suspension member, said second steering member engaging lateral sides of said second orifice;
said first engagement means and said second engagement means aligned with the longitudinal axis of said platform and below said platform;
said platform, said first steering member, and said second steering member rotatable in a vertical plane about an axis parallel to the platform longitudinal axis;
rotation of said platform in a vertical plane about an axis parallel to the platform longitudinal axis imposing differential vertical loading on lateral sides of each of said first suspension member and said second suspension member through said first engagement means and said second engagement means.

6 more elements

A coaster board, comprising:

an elongated, generally planar platform having a platform longitudinal axis;
said platform supported on a first suspension rod located near a longitudinal first end of said platform and further supported on a second suspension rod located near a distal second end of said platform;
said first suspension rod having outer portions with lateral axle-engaging openings for receiving a first axle and said second suspension rod having outer portions with lateral axle-engaging openings for receiving a second axle;
said first axle supported on a first pair of wheels and said second axle supported on a second pair of wheels;
a first steering bar fixedly attached to said platform near the platform first end and a second steering bar fixedly attached to said platform near the platform second end;
first engagement means engaging said first steering bar with said first suspension rod and second engagement means engaging said second steering bar with said second suspension rod;
said first engagement means and said second engagement means located near a lateral center of said platform and below said platform;
said platform, said first steering bar, and said second steering bar rotatably moveable in a vertical plane about an axis parallel to said platform longitudinal axis;
whereby rotation of said platform in a vertical plane about an axis parallel to said platform longitudinal axis imposes differential vertical loading on lateral sides of each of said first suspension rod and said second suspension rod through said first engagement means and said second engagement means.

6 more elements

A coaster board, comprising:

an elongated platform having a platform longitudinal axis supported on a front suspension rod and a rear suspension rod;
the front suspension rod having outer portions with lateral axle-engaging openings for receiving a front axle;
the rear suspension rod having outer portions with lateral axle-engaged openings for receiving a rear axle;
the front axle supported on two longitudinally aligned front wheels;
the rear axle supported on two longitudinally aligned rear wheels;
said front suspension rod including a laterally central front rod orifice;
said rear suspension rod including a laterally central rear rod orifice;
a front steering bar having a front central bar segment extending through said front rod orifice, a portion of said front central bar segment adjoining said front central rod orifice;
a rear steering bar having a central bar segment extending through said rear rod orifice, a portion of said rear central bar segment adjoining said rear central rod orifice;
said front steering bar and said rear steering bar fixedly attached to said platform;
said front suspension rod and said rear suspension rod each resiliently engaging said platform;
whereby vertical rotation of said platform, said front steering bar, and said rear steering bar about an axis parallel to said platform longitudinal axis induces differential vertical force on the wheels through engagement of the front steering bar with the front suspension rod and through engagement of the rear steering bar with the rear suspension rod.

9 more elements

Dependencies are inferred from the claim text.