Pedal-driven roller-skate
Patent 5129664 Issued on July 14, 1992. Estimated Expiration Date: 
February 25, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 25, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1533824 3107926 3318614 InventorApplicationNo. 660026 filed on 02/25/1991US Classes:280/221, Interconnected with propulsion means280/11.115With propulsion means driven by occupantExaminersPrimary: Hill, Mitchell J.Attorney, Agent or FirmInternational ClassB62M 001/04AbstractA pedal-driven roller-skate comprising two pedals alternatively rotated to drive three parallel sets of rollers to rotate forwards or backwards. The rollers have each two pivot holes symmetrically disposed at two eccentric locations. The first pedal is mounted on a first pair of wheel axles which are respectively fastened in the first pivot holes of the first and second parallel sets of rollers while the second pedal is mounted on a second pair of wheel axles which are respectively fastened in the second pivot holes of the second and third parallel sets of rollers. When the first pedal is rotated to a forward or upper position the second pedal is alternatively rotated to a backward or downward position. | |
