Weight-training apparatus having selectable weight plates
Patent 7121988 Issued on October 17, 2006. Estimated Expiration Date: 
January 27, 2025. 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 27, 2025. 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 ReferencesAdjustable weight exercise device Adjustable dumbbell Exercise weight system Weight-lifting apparatus and method Weight stack methods and apparatus Collapsible aquatic/land weight training system Patent #: 5967952 InventorAssigneeApplicationNo. 11044410 filed on 01/27/2005US Classes:482/106, Handheld bar with weight at each end (e.g., barbell, dumbbell, etc.) or component thereof482/50, Having weight feature (e.g., dumbbell, etc.)482/101, Track or way guided user interface element482/107, Having securing member (e.g., locking collar, etc.) for retaining weight on bar482/108, Bar held by single hand of user (e.g., dumbbell, etc.)482/908, ADJUSTABLE482/111Utilizing fluid resistanceExaminersPrimary: Crow, Stephen R.Assistant: Chhabra, Arun Attorney, Agent or FirmForeign Patent References
International ClassesA63B 21/072A63B 21/075 A63B 21/062 A63B 23/16 AbstractAn adjustable weight-training apparatus is provided having a plurality of weight plates, each of the weight plates including a protrusion. The weight-training apparatus has longitudinally opposing ends, each of the ends having longitudinally outer and inner groups of weight plates. A rotatable bar is also included in the apparatus and includes an inner control shaft and an outer control shaft. The inner control shaft is configured to rotate within the outer control shaft. The rotatable bar is configured to rotate within central holes of the weight plates. The inner control shaft has a first plurality of longitudinally spaced lobes. The inner control shaft is rotatable to position selected ones of the first plurality of lobes in engagement with the protrusions of selected weight plates of at least one of the outer groups of weight plates. The outer control shaft has a second plurality of longitudinally spaced lobes. The outer control shaft is rotatable to position selected ones of the second plurality of lobes in engagement with the protrusions of selected weight plates of at least one of the inner groups of weight plates.Other References
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