Weight-lifting apparatus and method
Patent 5839997 Issued on November 24, 1998. Estimated Expiration Date: 
January 22, 2018. 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.
January 22, 2018. 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 1779594 3771785 3825253 3913908 Dumbbell Dumbbell, adjustable, and locking means Weight lifting apparatus Exercise lifting bar with self-contained weight mounts Barbell system Variable add-on weight device InventorsAssigneeApplicationNo. 010863 filed on 01/22/1998US Classes:482/107, Having securing member (e.g., locking collar, etc.) for retaining weight on bar482/108Bar held by single hand of user (e.g., dumbbell, etc.)ExaminersPrimary: Mulcahy, JohnAttorney, Agent or FirmForeign Patent References
International ClassA63B 021/075AbstractA weight-lifting apparatus includes a plurality of weights each having a central hole and a slot extending from the central hole to a perimeter of the associated weight, the slot having a width less than the diameter of the central hole. The apparatus further includes a shaft having opposing ends defining a diameter about equal to the central holes, and a sleeve positioned on the shaft. The shaft is shaped to rotatably engage the central holes and is rotatable to different positions. The shaft further has a plurality of recessed surfaces on the opposing ends corresponding to the different positions that extend different longitudinal lengths, the recessed surfaces defining with other surfaces on the shaft a reduced dimension about equal to the width of the slot. Further, the shaft and the weights are configured so that by rotating the shaft, the recessed surfaces are selectively positioned to allow the shaft to slide along one or more of the slots, thus selectively releasing the weights. A person using the weight-lifting apparatus can easily rotate the shaft to select a desired number of weights without interrupting their exercise routine.Field of SearchHaving weight feature (e.g., dumbbell, etc.)Utilizing weight resistance Including stationary support for weight Having guide around or through weight And flexible force transmitting linkage element Handheld bar with weight at each end (e.g., barbell, dumbbell, etc.) or component thereof Having securing member (e.g., locking collar, etc.) for retaining weight on bar Bar held by single hand of user (e.g., dumbbell, etc.) Club | |
