US Patent 8720963 Apparatus for extracting an object from a cavity

An apparatus for extracting an object from a cavity is disclosed. The apparatus includes a collet surrounded by a sleeve, which both extend into the cavity. Fingers of the collar of the collet are contracted to grasp the object by the advancement of the collet into the sleeve. The collet is advanced by rotating a nut, which is located outside of the cavity and engages with a threaded portion of the shaft of the collet. The shaft includes a groove extending through the threaded portion of the shaft. This groove engages with a protrusion extending from a handle to prevent the collet from rotating during rotation of the nut and advancement of the collet. The handle is located outside of the cavity and is held during the extraction.