Abstract: A seal for a blood processing centrifuge bowl which is formed of a dynamic rotary seal and a static seal. The dynamic rotary seal is formed of an upper graphite or carbon non-rotating ring member and a lower two-piece rotatable ring member formed of a ceramic bearing surface bonded by adhesive to a plastic adapter ring. The static seal is comprised of an elastomeric diaphragm formed over the upper ring member and secured thereto by a plastic retaining ring.

Abstract: A flow device including a plurality of flow channels which converge in a common housing containing a pre-biased flow control diaphragm at the position of convergence of at least two channels. The control diaphragm is pre-biased by a set of prongs which extend from an integral portion of the common housing.

Abstract: Method and apparatus for the control of fluid flow using a flexible disc that is positioned in a control channel and restricted to movement along the longitudinal axis of the channel. Closure control is exercised by moving the disc into closer contact with a ring seat that is essentially self-purging of debris. Since the disc is confined to essentially longitudinal movement, distortion due to random lateral movement is avoided.

Abstract: Method and apparatus for the control of fluid flow using a flexible disc that is positioned in a control channel and restricted to movement along the longitudinal axis of the channel. Closure control is exercised by moving the disc into closer contact with a ring seat that is essentially self-purging of debris. Since the disc is confined to essentially longitudinal movement, distortion due to random lateral movement is avoided.

Abstract: Close fittings for frangible objects such as glass decanters provided by a collar which can include a pouring spout and handle. The collar is positioned on the rim of the decanter against a gasket which is drawn into compressional engagement with the rim, without any substantial transverse movement that could damage the decanter, by threading a member into the collar. The decanter and the threading member include mating inclined surfaces which facilitate the compressional movement of the gasket into close contact with the rim as the member is threaded into the collar.

Abstract: Apparatus for the control of fluid flow using a flexible disc that is positioned in a control channel and restricted to movement along the longitudinal axis of the channel. This avoids the disadvantages of variable positionable discs, while retaining their advantages. Closure control is exercised by moving the disc into closer contact with a ring seat that is essentially self-purging of debris. Since the disc is confined to essentially longitudinal movement, distortion due to random lateral movement is avoided.