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US 12,440,718 B2Granted
Portable and variable exercise device
AssigneeBlix Strength LLC
InventorsDawn T. Gulick, Zachary John Pelli, Thomas D. Kauffman
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Abstract
The apparatus provides an exercise device that is portable, versatile, and enables the user to match the resistance of the device with the normal physiologic length-tension relationship of skeletal muscle. The device adds resistance in the form of cartridges that are stackable to summate resistance and can connect to a variety of attachments for use with arms, legs, or trunk, i.e., handle, bar, loop, etc. Given the device's portability, it can be used freestyle or mounted to various surfaces.
Claims19
An exercise device comprising:
- a cable;
- a force modulating pulley around which the cable is wound;
- and
- a constant force spring engaged to the force modulating pulley, wherein the constant force spring provides a constant resistance against rotation of the force modulating pulley when a force is applied to the cable;
- wherein the force modulating pulley varies the force that must be applied to rotate the force modulating pulley when the force is applied to the cable
- wherein the force modulating pulley has an hourglass profile extending between ends of the force modulating pulley along an axis thereof, wherein a minimum diameter of the hourglass profile is at a midpoint between the ends of the force modulating pulled along the axis, wherein the hourglass profile provides a low-to-high-to-low force relationship to a muscle being worked when using the exercise device.
3 more elements
Dependencies are inferred from the claim text.