초록 ▼

Improved skateboards and methods of obtaining or providing skateboards with improved trucks. Trucks have two axles or axes, two primary wheels, and two secondary wheels, and skateboards have eight wheels, four in front and four at the rear portion of the skateboard. The four primary wheels support m

Improved skateboards and methods of obtaining or providing skateboards with improved trucks. Trucks have two axles or axes, two primary wheels, and two secondary wheels, and skateboards have eight wheels, four in front and four at the rear portion of the skateboard. The four primary wheels support most or all of the weight of the skateboard when the skateboard is on a flat surface, and the two secondary wheels support the weight of one portion of the skateboard (e.g., front or rear) when the primary wheels cross a crack (e.g., a sidewalk contraction joint). In various embodiments, the secondary wheels are located outboard of the primary wheels. Further, in a number of embodiments, the axis of rotation or axle of the primary wheels remains parallel to that of the secondary wheels, whether the skateboard is going straight or turning.

대표청구항 ▼

1. A skateboard to be ridden by a rider, the skateboard comprising: a body comprising a top surface for supporting the rider of the skateboard, a bottom surface opposite the top surface, a front portion, and a rear portion opposite the front portion;a front truck attached to the bottom surface of th

1. A skateboard to be ridden by a rider, the skateboard comprising: a body comprising a top surface for supporting the rider of the skateboard, a bottom surface opposite the top surface, a front portion, and a rear portion opposite the front portion;a front truck attached to the bottom surface of the body of the skateboard at the front portion of the body, the front truck comprising: a primary front axle;two primary front wheels rotatably mounted on the primary front axle;at least one secondary front axle that is parallel to the primary front axle; andtwo secondary front wheels rotatably mounted on the at least one secondary front axle; anda rear truck attached to the bottom surface of the body of the skateboard at the rear portion of the body, the rear truck comprising: a primary rear axle;two primary rear wheels rotatably mounted on the primary rear axle;at least one secondary rear axle that is parallel to the primary rear axle; andtwo secondary rear wheels rotatably mounted on the at least one secondary rear axle;wherein the at least one secondary front axle is located in front of the primary front axle and the primary rear axle is located in front of the at least one secondary rear axle. 2. The skateboard of claim 1 wherein the primary front axle is positioned so that the two primary front wheels extend further from the top surface of the body than the secondary front wheels and the primary rear axle is positioned so that the two primary rear wheels extend further from the top surface of the body than the secondary rear wheels. 3. The skateboard of claim 2 wherein: the two primary front wheels each have a primary front wheel width;the two secondary front wheels each have a secondary front wheel width;the two primary rear wheels each have a primary rear wheel width;the two secondary rear wheels each have a secondary rear wheel width,the primary front wheel width is greater than the secondary front wheel width; andthe primary rear wheel width is greater than the secondary rear wheel width. 4. The skateboard of claim 2 wherein: the two primary front wheels each have a primary front wheel diameter;the two primary rear wheels each have a primary rear wheel diameter;a front axle spacing distance between the primary front axle and the at least one secondary front axle is less than the primary front wheel diameter; anda rear axle spacing distance between the primary rear axle and the at least one secondary rear axle is less than the primary rear wheel diameter. 5. The skateboard of claim 2 wherein: the two secondary front wheels are located closer together than the two primary front wheels;the two secondary rear wheels are located closer together than the two primary rear wheels;the two secondary front wheels extend between the two primary front wheels; andthe two secondary rear wheels extend between the two primary rear wheels. 6. The skateboard of claim 1 wherein: the rider has a weight, the primary front axle is positioned so that the two primary front wheels extend further from the top surface of the body than the secondary front wheels, and the primary rear axle is positioned so that the two primary rear wheels extend further from the top surface of the body than the secondary rear wheels, so that when the skateboard is ridden on a flat plane, at least 75 percent of the weight of the rider is supported by the two primary front wheels and the two primary rear wheels. 7. The skateboard of claim 1 wherein: the two primary front wheels each have a primary front wheel width;the two secondary front wheels each have a secondary front wheel width;the two primary rear wheels each have a primary rear wheel width;the two secondary rear wheels each have a secondary rear wheel width,the primary front wheel width is greater than the secondary front wheel width; andthe primary rear wheel width is greater than the secondary rear wheel width. 8. The skateboard of claim 7 wherein: the two primary front wheels each have a primary front wheel diameter;the two primary rear wheels each have a primary rear wheel diameter;a front axle spacing distance between the primary front axle and the at least one secondary front axle is less than the primary front wheel diameter; anda rear axle spacing distance between the primary rear axle and the at least one secondary rear axle is less than the primary rear wheel diameter. 9. The skateboard of claim 1 wherein: the two primary front wheels each have a primary front wheel diameter;the two primary rear wheels each have a primary rear wheel diameter;a front axle spacing distance between the primary front axle and the at least one secondary front axle is less than the primary front wheel diameter; anda rear axle spacing distance between the primary rear axle and the at least one secondary rear axle is less than the primary rear wheel diameter. 10. The skateboard of claim 9 wherein: the two secondary front wheels each have a secondary front wheel diameter;the two secondary rear wheels each have a secondary rear wheel diameter;a front axle spacing distance between the primary front axle and the at least one secondary front axle is less than the secondary front wheel diameter; anda rear axle spacing distance between the primary rear axle and the at least one secondary rear axle is less than the secondary rear wheel diameter. 11. The skateboard of claim 10 wherein: the two secondary front wheels are located closer together than the two primary front wheels;the two secondary rear wheels are located closer together than the two primary rear wheels;the two secondary front wheels extend between the two primary front wheels; andthe two secondary rear wheels extend between the two primary rear wheels. 12. The skateboard of claim 1 wherein: the two secondary front wheels each have a secondary front wheel diameter;the two secondary rear wheels each have a secondary rear wheel diameter;a front axle spacing distance between the primary front axle and the at least one secondary front axle is less than the secondary front wheel diameter; anda rear axle spacing distance between the primary rear axle and the at least one secondary rear axle is less than the secondary rear wheel diameter. 13. The skateboard of claim 1 wherein: the two secondary front wheels are located closer together than the two primary front wheels;the two secondary rear wheels are located closer together than the two primary rear wheels;the two secondary front wheels extend between the two primary front wheels; andthe two secondary rear wheels extend between the two primary rear wheels. 14. A skateboard to be ridden by a rider, the skateboard comprising: a body comprising a top surface for supporting the rider of the skateboard, a bottom surface opposite the top surface, a front portion, and a rear portion opposite the front portion;a front truck attached to the bottom surface of the body of the skateboard at the front portion of the body, the front truck comprising: a primary front axle;two primary front wheels rotatably mounted on the primary front axle;at least one secondary front axle that is parallel to the primary front axle; andtwo secondary front wheels rotatably mounted on the at least one secondary front axle; anda rear truck attached to the bottom surface of the body of the skateboard at the rear portion of the body, the rear truck comprising: a primary rear axle;two primary rear wheels rotatably mounted on the primary rear axle;at least one secondary rear axle that is parallel to the primary rear axle; andtwo secondary rear wheels rotatably mounted on the at least one secondary rear axle;wherein: the two primary front wheels each have a primary front wheel width;the two secondary front wheels each have a secondary front wheel width;the two primary rear wheels each have a primary rear wheel width;the two secondary rear wheels each have a secondary rear wheel width;the two primary front wheels each have a primary front wheel diameter;the two primary rear wheels each have a primary rear wheel diameter;the two secondary front wheels each have a secondary front wheel diameter;the two secondary rear wheels each have a secondary rear wheel diameter;the primary front wheel width is greater than the secondary front wheel width;the primary rear wheel width is greater than the secondary rear wheel width;a front axle spacing distance between the primary front axle and the at least one secondary front axle is less than the primary front wheel diameter;a rear axle spacing distance between the primary rear axle and the at least one secondary rear axle is less than the primary rear wheel diameter;the front axle spacing distance between the primary front axle and the at least one secondary front axle is less than the secondary front wheel diameter;the rear axle spacing distance between the primary rear axle and the at least one secondary rear axle is less than the secondary rear wheel diameter;the two secondary front wheels are located closer together than the two primary front wheels;the two secondary front wheels extend between the two primary front wheels;the two secondary rear wheels are located closer together than the two primary rear wheels; andthe two secondary rear wheels extend between the two primary rear wheels. 15. The skateboard of claim 14 wherein: the at least one secondary front axle is located in front of the primary front axle; andthe primary rear axle is located in front of the at least one secondary rear axle. 16. The skateboard of claim 14 wherein the primary front axle is positioned so that the two primary front wheels extend further from the top surface of the body than the secondary front wheels and the primary rear axle is positioned so that the two primary rear wheels extend further from the top surface of the body than the secondary rear wheels. 17. The skateboard of claim 16 wherein: the at least one secondary front axle is located in front of the primary front axle; andthe primary rear axle is located in front of the at least one secondary rear axle. 18. The skateboard of claim 14 wherein: the rider has a weight, the primary front axle is positioned so that the two primary front wheels extend further from the top surface of the body than the secondary front wheels, and the primary rear axle is positioned so that the two primary rear wheels extend further from the top surface of the body than the secondary rear wheels so that when the skateboard is ridden on a flat plane, at least 75 percent of the weight of the rider is supported by the two primary front wheels and the two primary rear wheels. 19. A method of obtaining or providing a skateboard that will glide over sidewalk cracks, the method comprising, in any order, at least the acts of: obtaining or providing a skateboard body comprising a top surface for the rider of the skateboard to stand on, a bottom surface opposite the top surface, a front portion, and a rear portion opposite the front portion;obtaining or providing a front truck attached to the bottom surface of the body of the skateboard at the front portion of the body, the front truck comprising two primary front wheels that rotate about a common primary front axis and two secondary front wheels that rotate about a common secondary front axis, wherein the secondary front axis is parallel to the primary front axis;obtaining or providing a rear truck attached to the bottom surface of the body of the skateboard at the rear portion of the body, the rear truck comprising two primary rear wheels that rotate about a common primary rear axis and two secondary rear wheels that rotate about a common secondary rear axis, wherein the secondary rear axis is parallel to the primary rear axis;wherein the two primary front wheels and the two primary rear wheels are rigidly held extending lower than the two secondary front wheels and the two secondary rear wheels so that at least a majority of a rider's weight is supported by the two primary front wheels and the two primary rear wheels when the rider rides the skateboard on the sidewalk where the sidewalk is flat, and the two secondary front wheels and the two secondary rear wheels are rigidly held extending not as low as the two primary front wheels and the two primary rear wheels so that, when the primary front wheels cross a crack in the sidewalk, the front portion of the skateboard is supported by the secondary front wheels and when the primary rear wheels cross the crack in the sidewalk, the rear portion of the skateboard is supported by the secondary rear wheels. 20. The Method of claim 19 further comprising locating the front truck and the rear truck on the skateboard body so that the secondary wheels are outboard of the primary wheels.