US Patent 11369523 Arm sleeve that provides assistance during an arm motion

Implementations of an arm sleeve that provides external assistance to an arm and shoulder of a user during an arm motion are provided. In one implementation, the arm sleeve comprises a framework that includes a torso portion configured to be attached to the torso of the user and an arm portion configured to receive at least a portion of the arm of the user. The framework of the arm sleeve is a unitary construction of interconnected elastic members that define openings therebetween. The interconnected elastic members include a first elastic member configured to play an active part throughout an overhead throwing motion, a second elastic member configured to decrease the concentric contraction force necessary for shoulder abduction during the cocking phase of a throwing motion, and a third elastic member configured to assist eccentrically contracting muscles during the deceleration phase of a throwing motion. In another implementation, the framework of the arm sleeve is encased by an elastomeric cover.