Bung

Abstract: 1,200,966. Separating liquids; centrifugal separation. C. M. COLEMAN. 16 July, 1968 [17 Nov., 1967], No. 33872/68. Headings B1D and B2P. [Also in Divisions A5 and B8. Liquid layers 42, 44 (e.g. blood cells and plasma) in a tube 40 are sealed apart by means of a resilient bung 46 which is forced downwardly through layer 44 (the displaced liquid passing around or through the bung) until it arrives at the interlayer boundary. As described, a blood sample is centrifuged or allowed to settle into two phases, and then the tube is subjected to a stronger centrifugal force to cause bung 46, originally secured to a stopper 48, to sever therefrom and commence its downward journey. In another embodiment, Figs. 8, 8A (not shown) the displaced upper phase 44 may pass through the bung via a passageway 82 incorporating a valve. In Figs. 2-4 (not shown) the bung is moved downwardly, not by a centrifugal force, but directly by a plunger (30). Preferably the density of the bung is intermediate that of the blood layers, (i.e. 1.045-1.090) so that it automatically stops at the interphase boundary during centrifuging.

Abstract: A medicament delivery device comprises a housing, a holder within the housing for receiving a medicament cartridge, a piston rod for driving a bung of the medicament cartridge, a drive mechanism including a motor for providing an output drive to the piston rod for delivering the medicament and control means for controlling operation of the device. The device is additionally provided with a bung sensor for sensing when the piston rod is in contact with the bung and the control means is operative for advancing the drive of the piston rod towards the bung.

Abstract: Friction clutch release apparatus for a motor vehicle comprises a driver-operable master cylinder, a slave cylinder and a conduit which connects the master outlet to the slave cylinder inlet. A liquid reservoir communicates with the bore of the master cylinder between the piston and the outlet when the piston is retracted and has a vent port. The apparatus is assembled, filled with liquid and bled before being installed on the motor vehicle. The vent port may be closed temporarily for convenience of transport and storage after the apparatus is bled, for example by use of a suitable removable closure device which would be removed after installation of the apparatus on the motor vehicle, or may include a movable wall within the reservoir chamber by which liquid within the chamber is separated from that part of the chamber with which the vent port communicates. The vent port may be closed temporarily by a strip of adhesive tape, a bung or other suitable closure device which can be removed readily, or by a puncturable membrane. The movable wall may be a bellows.

Abstract: A closure device for use in the closure of stomas and the like is described and comprises a bellows like reservoir which is integral with and in fluid communication with a bell-shaped inflatable bung. The inflatable bung can be positioned with a body channel of the stoma and inflated to a predetermined degree defined by the volume of the reservoir. A filter channel is provided in an annular ring of the device and is positioned so as to permit escape of flatus without becoming blocked by liquid or solid materials from the body channel.