US Patent 11565143 Clamping device

A clamping device, such as a barbell collar, includes a primary member having a cylindrical body with a central passage configured to receive a mounting member therethrough, an actuator mechanism connected to the primary member and moveable between a locked position, where the primary member securely engages the mounting member, and an unlocked position, where the primary member is removable from the mounting member. The clamping device also includes a retaining mechanism configured to releasably retain the actuator in the unlocked position.