Abstract: An injury resistant needle device comprises an outer protective tube, a needle unit having a needle which is movable relative to the outer protective tube between an extended position in which the needle is exposed outside of the outer protective tube and a retracted position in which the needle is completely confined inside the outer protective tube, and elements for moving the needle unit relative to the outer protective tube between the extended and retracted positions. The moving elements including a plurality of first engaging formations provided on the needle unit, and a rotary member provided with second engaging formations interengageable with the first engaging formations and turnable by a user, so that upon turning of the rotary member by a user's finger the needle unit is displaced between the extended and retracted positions.

Abstract: A shower massage head having rotating brushes and an outlet for a shower including intake and outlet conduits connected to a rotor. The rotor blades are so arranged that they do not extend to the center of the rotor thereby providing relief against back pressure on the rotor blades that would slow the rotor. The rotor is also eccentrically mounted adjacent to an inlet port so that as the rotor is rotated by the water input the eccentric mounting causes a rapidly increasing cross-sectional path for the exit of water at the periphery of the rotor. A gate valve is provided in the exit section so that all of the water which is operated at the brush or rotor may be exhausted or all of the water may be directed to a shower head or a division may be made between exhaust and shower head to control the shower head flow. Various other attachments may be used including an eccentrically mounted massaging device operated by the rotor from a platform connected to the rotor having an eccentric drive stub shaft.