GERALD W JOHNSON
Electrician at Ley Rd, Houston, TX

5147327, Sep 15, 1992

Aug 1, 1991

7/739325

Gerald W. Johnson - Houston TX

A61M 532

604198

A hypodermic needle has a retractable tubular sheath slidably mounted on its forward end and movable relative thereto between a rearward retracted position exposing the front end of the needle and a forward protective position enclosing the front end of the needle. In one embodiment, a spring within the sheath urges the sheath to the forward protective position enclosing the front end of the needle. The rear of the sheath cooperates with pins on the needle to engage them upon relative rotation in one direction to allow rotation as a single unit to connect the needle to fluid ejection or withdrawal members. Relative rotation in the opposite direction disengages the pins allowing the sheath to be moved rearward causing the front end of the needle to protrude beyond the front end of the sheath and to lock the needle and sheath together upon further relative rotation in the opposite direction to disconnect and dispose of the needle without inadvertent injury by contact with the needle. Another embodiment has protrusions on the needle and a retractable sheath slidably mounted on the needle and movable between a rearward retracted position exposing the needle front end and a forward protective position engaging the protrusions and covering the front end of the needle. A further modification has a tubular catheter slidably received on the needle for hypodermic penetration therewith which is removably connected to the sheath whereby when the sheath and needle are removed from the catheter only the catheter remains in place.

5258026, Nov 2, 1993

Feb 6, 1992

7/832072

Gerald W. Johnson - Houston TX
Jeffrey W. Johnson - Ft. Smith AR

A61F 212

623 8

A surgical procedure for breast augmentation is disclosed in which an incision is made inside the navel or umbilicus. An endotube which has an obturator with a bullet shaped tip is introduced into this incision and pushed from the umbilicus, staying just above the fascia of the interior abdominal and chest wall, and below the subcutaneous tissue and fat, to a position behind the breast. The obturator is removed and an endoscope used to verify the proper location of the tunnel. The endotube is removed leaving a temporary tunnel leading to a space behind the breast. A hollow prosthesis is rolled up tightly, positioned inside the end of the endotube and pushed into the tunnel behind the breast. The prosthesis is held in place by the hand of the surgeon on the breast and the endotube removed. The prosthesis is pumped full of saline solution to about a 50% overfill.

4888003, Dec 19, 1989

Feb 29, 1988

7/161492

Gerald W. Johnson - Houston TX
Jeffrey W. Johnson - Houston TX

A61M 100

604319

A vacuum apparatus for surgical aspirators comprises a motor and vacuum pump on a supporting base with an evacuated chamber surrounding them to reduce noise produced by the apparatus. The apparatus preferably comprises first and second hollow housings of one or more wall members defining an enclosure surrounding the motor and pump, the wall members of said housings spaced apart to define a vacuum chamber around the motor and vacuum pump. The enclosure has an opening to surrounding atmosphere through the supporting base or through a sealed opening through the housings. The pump outlet communicates with surrounding atmosphere. A passageway connects the vacuum chamber both to the vacuum pump inlet and the exterior of the apparatus. Operation of said motor and pump is effective to withdraw air from the chamber to produce a vacuum therein supplied for use through the passageway, the vacuum is the reservoir being sufficient for use over a period of time and providing sound insulation against noise produced by the apparatus. The apparatus has pressure responsive valves for (1) preventing flow of air into the vacuum chamber when the surgical cannula is removed, (2) closing off the vacuum chamber from the surgical cannula when the vacuum is insufficient and causing the vacuum pump to work directly on the surgical cannula, and (3) shutting down the motor when the vacuum reaches a selected level.