Coaxial screw gear sleeve mechanism

A coaxial screw gear sleeve mechanism comprising:

• a first member and a second member each having an inner surface configured to face the inner surface of the other;
• a post having a threaded exterior surface on a portion of the post;
• and
• a corresponding sleeve configured to surround the post and having:
• a threaded interior surface on a portion of the sleeve configured to directly interface with the threaded exterior surface of the post;
• and
• a geared exterior surface on a portion of the sleeve;
• and
• a drive mechanism having a surface configured to interface with and drive the geared exterior surface of the sleeve,
• such that selective operation of the drive mechanism causes a simultaneous expansion of the sleeve relative to the drive mechanism and the post relative to the sleeve, and
• wherein the coaxial screw gear sleeve mechanism includes a pair of said posts each with a said corresponding sleeve both simultaneously driven by the drive mechanism, and
• wherein each of the pair of posts has an end attached to and extending from the inner surface of the first member,
• the drive mechanism is a worm drive having a pair of threaded sections, each threaded section configured to interface with only one of the sleeves when the drive mechanism is operated, and
• the second member includes a unitary body defining a pair of threaded sleeve openings in the inner surface each sized to rotatingly accommodate one of the sleeves therein,
• the body further defining a drive mechanism aperture sized to rotatingly contain the drive mechanism therein,
• wherein each of the threaded sections of the drive mechanism interfaces with the corresponding sleeve through a separate aperture in the body between the drive mechanism aperture and the sleeve openings.