Easy-to-assemble exercise bike
Patent 5421794 Issued on June 6, 1995. Estimated Expiration Date: 
December 10, 2012. 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.
December 10, 2012. 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 ReferencesFoot massage mat Exercise arm for a stationary bicycle Exercise kit, including balancing device and method of using same Pedal-driven roller-skate Patent #: 5129664 InventorAssigneeApplicationNo. 988764 filed on 12/10/1992US Classes:482/57, Bicylcling280/221, Interconnected with propulsion means482/51INVOLVING USER TRANSLATION OR PHYSICAL SIMULATION THEREOFExaminersPrimary: Crow, Stephen R.Attorney, Agent or FirmInternational ClassesA63B 023/00B62M 001/04 Foreign Application Priority Data1992-07-07 CNAbstractAn exercise bike, comprising two footboards, six wheels, and four straight shafts with trapezoid-headed ends, is provided. Symmetrically arranged in the disk of each wheel are two eccentrical trapezoid apertures. The ends of the shafts are orthogonally inserted into the trapezoid apertures of the wheels, to form a wheel frame, thus avoiding the possibility of assembling the exercise bike improperly. The wheels are arranged in three lines, and the middle portions of the shafts are supported by bearings at the bottom of the boards and can rotate freely thereon. The bike can further be assembled into a safety-type exercise bike, or a massage-type one. When the footboards are threaded, the bike will move forward in a fluctuating manner. The various parts can leave the factory in separate packages for the customers to assemble on their own. The products can therefore be transported in large quantities and over long distances.Other References
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