Abstract: A valve body (12) has an inlet opening (22) and an outlet opening (24) interconnected by a fluid passageway (28, 30) having a flow aperture (34). The valve comprises a diaphragm (14) (typically of the duckbill type) that is located across the flow aperture (34) and has slits in a collapsible aperture (39). This prevents backflow from the outlet to the inlet. The valve has an actuator (16) in the form of a plunger for influencing the fluid flow. Also disclosed is a pressure release valve whereby a high pressure on the outlet side can partially collapse the aperture (39) to temporality vent fluid from the high pressure outlet side.

Abstract: A non-return valve (10), typically of commonly called duckbill valve shape, comprising a valve body (12) and a valve membrane (14). The valve body (12) is generally tubular and includes an elongate passageway (16) with inlet (18) and outlet (20) at opposing ends. The valve membrane (14) is of a generally conical-shaped diaphragm formed integrally with the valve body (12). The diaphragm (14) has a collapsible opening or aperture (22) located at or adjacent the cones apex. The conical diaphragm (14) is oriented with its apex pointing downstream. The resiliently flexible material from which the diaphragm (14) is constructed, ensures that the diaphragm (14) in a collapsed condition obstructs or closes the aperture (22) to prevent fluid flowing in a reverse direction, i.e. backflow towards the inlet.

Abstract: The present invention relates generally to a non-return valve (10) comprising a valve body (12) and a valve membrane (14). The valve body (12) is generally tubular and includes an elongate passageway (16) having an inlet and an outlet defined at its opposing ends (18) and (20), respectively. The valve membrane (14) is in the form of a conical-shaped diaphragm formed integral with the tubular valve body (12). The diaphragm (14) is configured as a generally conical-shaped element having a collapsible opening or aperture (22) located at or adjacent its apex. The conical diaphragm (14) is oriented with its apex in a downstream flow direction. The resiliently flexible material from which the diaphragm (14) is constructed ensures that the diaphragm (14) in a collapsed condition obstructs or closes the aperture (22) to prevent fluid flowing in a reverse direction towards the inlet (18).

Abstract: A non-return valve (10), typically of commonly called duckbill valve shape, comprising a valve body (12) and a valve membrane (14). The valve body (12) is generally tubular and includes an elongate passageway (16) with inlet (18) and outlet (20) at opposing ends. The valve membrane (14) is of a generally conical-shaped diaphragm formed integrally with the valve body (12). The diaphragm (14) has a collapsible opening or aperture (22) located at or adjacent the cones apex. The conical diaphragm (14) is oriented with its apex pointing downstream. The resiliently flexible material from which the diaphragm (14) is constructed, ensures that the diaphragm (14) in a collapsed condition obstructs or closes the aperture (22) to prevent fluid flowing in a reverse direction, i.e. backflow towards the inlet.

Abstract: The present invention relates generally to a non-return valve (10) comprising a valve body (12) and a valve membrane (14). The valve body (12) is generally tubular and includes an elongate passageway (16) having an inlet and an outlet defined at its opposing ends (18) and (20), respectively. The valve membrane (14) is in the form of a conical-shaped diaphragm formed integral with the tubular valve body (12). The diaphragm (14) in configured as a generally conical-shaped element having a collapsible opening or aperture (22) located at or adjacent its apex. The conical diaphragm (14) is oriented with its apex in a downstream flow direction. The resiliently flexible material from which the diaphragm (14) is constructed ensures that the diaphragm (14) in a collapsed condition obstructs or closes the aperture (22) to prevent fluid flowing in a reverse direction towards the inlet (18).

Abstract: A multi-featured first-in-first-out (FIFO) memory device on a monolithic semiconductor integrated circuit chip. The FIFO device is bi-directional, in that the user may select the direction of data transfer through the device. The device may be configured in a transparent bypass mode of operation, wherein the FIFO memory array is bypassed, and data is transferred directed from either device input/output port to the other device input/output port. In another mode of operation allowing registered bypass operation, a byte of data may be written in an internal register from the device port being used to output data for later transfer to the device port presently being used to input data to the FIFO memory array. The FIFO device further includes a user-testable mode of operation, wherein data written into the FIFO memory array through a device input port may be read out of the same device input port.