Abstract: A fingerprint gun lock apparatus for quickly and safely locking and unlocking a trigger of a gun includes a frontside body having a frontside inner face with an extended portion and a recessed portion. A screw gear is coupled to a motor within a frontside inner cavity. A pair of locking pins each has a threaded end coupled to the screw gear, extends through a pair of pin apertures, and has a hooked distal end. The pair of locking pins secures a backside body to the frontside body around the trigger of the gun. A fingerprint scanner activates the motor to turn the screw gear and separate the pair of locking pins when an authorized fingerprint is touched to the scan side to allow the frontside body and the backside body to separate.

Abstract: The invention provides an improved apparatus and methods for carrying out cardiopulmonary bypass. In particular, the invention relates to pericardial blood suction apparatus and methods, which can be carried out during cardiopulmonary bypass procedures.

Abstract: A vehicle anti-theft device is disclosed. The anti-theft device provides a key operated switch that makes or breaks the electrical continuity of four electrical circuits. These electrical circuits are essential to the operation of the vehicle; therefore their discontinuity prevents vehicle operation. A lock housing carries a lock having a rotating spindle. The spindle carries a perpendicular drive pin which engages a bushing having a helix shaped groove in its interior surface. A tab-like raised key sliding in a keyway slot in the housing prevents the bushing from rotating. Therefore, rotation of the spindle creates an axial movement of the bushing. A male contact block, carrying four U-shaped solid contact pins may be extended by the axial movement of the bushing to engage a female contact block carrying eight female socket contacts which are connected to eight in-coming wires. When extended, each U-shaped pin creates electrical continuity between a pair of wires.

Abstract: A mixing method uses, and a colloidal grout mixing apparatus comprises, an upright cylindrical vessel in which a mixer is located. The mixer comprises a shaft extending substantially co-axially with the longitudinal axis of the vessel, and a paddle assembly mounted on the shaft. The paddle assembly produces a vortex in liquid in the vessel, and also provides a high shear region near the base of the vessel. A non-shear pump is connected to the base to discharge grout from the vessel. The grout may be discharged to a drum containing radioactive waste and mounted on a vibratory platform.