초록 ▼

A skateboard having a deck; a frame mounted under the deck; a pedal pivotally mounted to the frame substantially below the deck and adjacent a forward portion of the deck; a plurality of wheels and clutch bearing retaining drive wheels rotatably mounted to substantially conventional diagonal axis st

A skateboard having a deck; a frame mounted under the deck; a pedal pivotally mounted to the frame substantially below the deck and adjacent a forward portion of the deck; a plurality of wheels and clutch bearing retaining drive wheels rotatably mounted to substantially conventional diagonal axis steering trucks on the underside of the deck; a block having grooves therein and mounted underneath the deck; transmission member comprising a rack with two members having upwardly facing portions slidable within the grooves in the block and downwardly facing toothed portions for driving pinions rotatably mounted to the frame, the pinions driving pulleys having clutch bearings therein and also rotatably mounted to the frame, the pulleys being operably connected to drive wheels by loops of flexible belt material of circular cross section on either side of steering axes such that depression of the pedal reciprocates the rack members via a roller engagement between the rack and the pedal to impart rotational motion to the drive wheels; and spring return member for biasing the rack and the pedal toward their ready positions when the pedal is not depressed. In a second embodiment, a modified transmission member is provided wherein a similar rack is reciprocable along a system of rollers and is linked to a cammed surface to provide variable speed output over the range of pedal depression.

대표청구항 ▼

A skateboard comprising: an elongated deck; a pedal pivotally mounted with respect to said deck and pivotable between a first ready position and a second depressed position; a plurality of wheels rotatably mounted on the underside of said deck for supporting said each on a surface including at least

A skateboard comprising: an elongated deck; a pedal pivotally mounted with respect to said deck and pivotable between a first ready position and a second depressed position; a plurality of wheels rotatably mounted on the underside of said deck for supporting said each on a surface including at least one drive wheel retaining a clutch bearing; transmission means interposed between said pedal and said at least one drive wheel such that movement of said pedal from said pedal\s first ready position to said depressed position causes said drive wheel to rotate and move said skateboard along said surface, said transmission means including a rack; spring return means for biasing said rack toward a first position when said pedal is not depressed; and a frame member fixedly mounted to and extending downwardly from said deck, said pedal being pivotally mounted to said frame member at a location a substantial distance below said deck; wherein said rack comprises at least one horizontally disposed member having an upwardly facing slidable portion that slides within a groove in a block mounted to the underside of said deck and a downwardly facing toothed potion for meshing with and driving a pinion rotatably mounted to a frame member fixedly mounted to and extending downwardly from said deck, said pinion driving a pulley rotatably mounted to a said frame member, said pulley driving said drive wheel for propelling said drive wheel, and wherein said rack has a roller at one end thereof of rollably engaging said pedal.