Abstract: A simplified and easily operative flow control mechanism for an automatic pressure reducing equipment characterized in that a pressure detector detects such an inconvenient condition that a pressure of high pressure sample water is extremely reduced on an inlet line of a pressure reducing mechanism until the pressure reducing mechanism becomes inoperable, and that pressure-reduced sample water can bypass a flow control valve being provided on an outlet line of the pressure reducing mechanism by an automatic opening operation of an electromagnetic control valve so as to feed a predetermined amount of the sample water to an analysis system.

Abstract: An injection timing control device for an internal combustion engine includes a connector plate constantly biased in a predetermined direction. A hydraulic actuator urges the connector plate in the other direction in response to a fluid pressure communicated thereto, thereby actuating an eccentric cam mechanism to vary a fuel injection timing. The line of action of the biasing force and that of the urging force opposite to the biasing force, each imparted to the connector plate, lie in a common plane which contains an axis of the hydraulic actuator, so that the connector plate is prevented from tilting and thereby effecting the operation of the cam mechanism.

Abstract: A pulsatile blood pump comprising a disposable power bladder of flexible and anticoagulative material which is provided with a suction port with an inlet check valve and a delivery port with an outlet check valve to constitute a blood pump unit and hermetically sealed container for receiving said blood pump unit, said container being connected to a pulsating mechanism and filled with a pressure transmissive fluid which is subjected to a pulsatile pressure generated by the pulsating mechanism to vary the volume of the power bladder for pulsatile blood delivery.