L'accumulateur de liquide sous haute pression à niveau de liquide régulé comprend une enceinte (100) qui est en communi­cation avec un circuit hydraulique et qui contient un fluide liquide (9) occupant partiellement l'espace interne à l'enceinte (100).

La régulation du niveau de liquide contenu dans l'enceinte (100) s'appuie sur un contrôle du volume de gaz surmontant le liquide (9).

Les moyens de régulation comprennent essentiellement un dispositif (1, 2) calibré d'injection de gaz sous pression dans une première cavité (7) et un dispositif (20, 4, 10) à calibrage com­mandé mécaniquement de soutirage de gaz dans une seconde cavité (8) séparée de la première cavité (7) par une cloison (13) présentant au moins un orifice calibré (5) situé dans une zone non immergea­ble, et une ouverture (6) située dans la zone de contrôle du niveau de liquide et s'étendant de part et d'autre de l'interface de niveau (N_i) entre le liquide et le gaz. Le dispositif (20) 4) 10) de soutirage de gaz réagit à la différence de pression existant entre les première et seconde cavités (7, 8) et présente une section de passage qui varie en fonction de l'évolution du niveau de liquide, un faible débit de gaz étant maintenu en permanence vers l'extérieur.

A level control system for a wheeled motor vehicle with sprung and unsprung masses, an accessory the activation of which indictes the probability of an associated vehicle load change, fluid power apparatus activatable to level the sprung mass relative to the unsprung mass and sensor apparatus effective to periodically indicate a trim or out-of-trim level condition according to predetermined criteria further comprises apparatus defining a service mode with a time period shorter than a predetermined activation time of the fluid power apparatus which avoids overshoot in level adjustment, a cruise mode with a time period longer than the out-of-trim duration of a predetermined long highway feature and a decision mode with a time period of duration intermediate the service and cruise time period durations and longer than the period of sprung mass oscillation during vehicle movement. It further comprises logic control apparatus effective to select from the service, cruise and decision time modes for the determination of trim level condition based on the previous mode, the trim level determination in the previous period and detection of an actuation of the accessory, with the decision mode being selected upon the initiation of system operation and as an intermediate step between service and cruise modes.

Le dispositif de décolmatage automatique, selon l'invention, comprend un capteur d'écoulement, un vérin pneumatique (6) et une bouteille de gaz comprimé, reliée au dit vérin (6), dont la mise en fonction, ainsi que la purge d'air du vérin (6), sont commandées par un distributeur, contrôlé par le bras du flotteur du capteur d'écoulement. La pleine ouverture de l'orifice (1) du régulateur est obtenue par action de la tige (61) du vérin (6) sur l'arête supérieure (21) du registre (2).

A regulator of the level of a liquid in a reservoir comprising a valve body (1) with a valve member (8) and float means to control the operation. The valve member is a membrane (8) with a first passage (9) between the valve inlet and an intermediate chamber (7) and a second passage (10,12) between the intermediate chamber (7) and the valve outlet. The second passage is interceptable and the relevant intercepting means (13,14) are actuated by the float. When the level is at a set value, the second passage (10, 12) is closed and the pressure in the intermediate chamber (7) is equal to the pressure upstream of the membrane (8). When the level decreases, the second passage (10, 12) opens depressurizing the intermediate chamber (7). In this condition, the membrane (8) raises to put into communication the valve inlet with the valve outlet.

An interface valve control system for use with a primary, or interface (6), vacuum-operated valve, and characterised in that a secondary valve, that is itself vacuum operated and that, is actuated by the same vacuum as is applied to a tank (2), such that if the actuating vacuum drops significantly then the secondary valve operates to close the primary, interface, valve (6) thus preventing further liquid being drawn into the transport system's collecting pipe; said secondary valve connecting a vacuum source to the interface valve (6), which is of a type having a through-passageway body (21) with a valve member (30) mounted therewithin actuated by a pressure differential between atmospheric air and vacuum across the valve the body (21) being flexible such that under an applied perpendicular force it deforms, whereby the valve member (30) flexes inside the body (21) to open the valve (20); and a timer to control how long the interface valve (6) is kept open.

An interface valve control system for use with a primary, or interface (6), vacuum-operated valve, and characterised in that a secondary valve, that is itself vacuum operated and that, is actuated by the same vacuum as is applied to a tank (2), such that if the actuating vacuum drops significantly then the secondary valve operates to close the primary, interface, valve (6) thus preventing further liquid being drawn into the transport system's collecting pipe; said secondary valve connecting a vacuum source to the interface valve (6), which is of a type having a through-passageway body (21) with a valve member (30) mounted therewithin actuated by a pressure differential between atmospheric air and vacuum across the valve the body (21) being flexible such that under an applied perpendicular force it deforms, whereby the valve member (30) flexes inside the body (21) to open the valve (20); and a timer to control how long the interface valve (6) is kept open.

Das Verfahren dient zum Steuern mindestens eines eine Steuerkammer durchströmenden Gasstromes. Der Durchtritt des Gasstromes durch die Steuerkammer wird von einer Sperrflüssigkeit gesteuert, die in der Steuerkammer einen vorgegebenen Pegelstand einnimmt. Die Sperrflüssigkeit wird mit mindestens einem den Pegelstand verändernden Steuerdruck beaufschlagt. Der Steuerdruck wird im Bereich einer den Gasstrom in die Steuerkammer einleitenden Einlaßleitung erzeugt.

Die Vorrichtung steuert einen eine Steuerkammer durchströmenden Gasstrom. Die Steuerkammer ist mit einer Sperrflüssigkeit bis zu einem vorgegebenen Pegelstand gefüllt. Oberhalb des vorgegebenen Pegelstandes ist ein Einlaßkanal angeordnet, der den Gasstrom im Bereich eines Einlasses in die Steuerkammer einleitet. Im Bereich der Steuerkammer ist gleichfalls ein Durchlaß angeordnet, der den Gasstrom in Richtung eines Auslaßkanals ableitet. In der Steuerkammer sind eine Druckleitung und ein Sperrflüssigkeit aus der Steuerkammer ableitender Abfluß vorgesehen. Der höchste Punkt des Ablasses liegt oberhalb des Pegelstandes auf einer Höhe, oberhalb derer sich die Sperrflüssigkeit nach Aufbringen eines den Pegelstand anhebenden Druckes befindet.

A liquid replenishing apparatus (K, K') for supplying liquid raw material replenishment (8) for liquid raw material (2) of an article to at least one raw material tank (1), including a replenishment tank (7) for storing the liquid raw material replenishment (8), a first pipe (6) extending between the replenishment tank (7) and the raw material tank (1), a second pipe (10) for introducing pressurized gas into a space (9) of the replenishment tank (7), a branch pipe (6') communicating with the first and second pipes (6, 10), a pressure regulator (18) provided in the second pipe (10), and a flow regulator (17) provided in the branch pipe (6').

A liquid level control system for controlling the flow of liquid into a reservoir, storage tank or other container. A nozzle develops a liquid flow steam therethrough, and a valve effectively opens and closes the nozzle. A fluid amplifier is associated with the nozzle and includes a fluid power stream, a signal developing port for receiving a fluid pressure signal from the power stream, and a sensor for diverting the fluid power stream from the signal developing port in response to the static presence of the interface at a predetermined sensing level of liquid in the reservoir. A pressure responsive switch is coupled to the valve and is located below the signal developing port and the pressure responsive switch to create a hydrostatic pressure head above the switch to maintain the switch and, therefore, the valve in a first condition when the fluid power stream delivers a fluid pressure signal to the signal developing port. A second condition is developed when the flluid power stream is diverted from the signal developing port.

Apparatus for controlling the level (12) of liquid (11) in a container (10) such as a carbonated liquid dispenser comprises a float operated valve (14, 15) in an upper part (16) of the container (10), which when opened due to a fall in the level (12) of liquid (11) in the container (10) as liquid (11) is drawn therefrom, allows gas under pressure (Y) to escape from the upper part (16) of the container (10) into a cylinder (17). In the cylinder (17) is a pressure operated switch (19, 20) or valve which controls the supply (21) of liquid to the container to replace that drawn off, and a bleed valve (22) which allows leakage of gas from the cylinder (17) to atmosphere so that the gas pressure in the cylinder (17) falls when the drawn off liquid is replaced and the float operated valve (14,15) closes. The pressure operated switch (19, 20) or valve then stops the supply (23) of liquid to the container (10) to maintain the level (12) of liquid (11) in the container (10).

Um eine flüssige Substanz (3) zu verdampfen und einem Verbraucher zuzuführen, ist ein Blasenverdampfer (1) vorgesehen, in den ein Trägergas (7) geleitet wird. Bei Erreichen eines Minimalfüllstands (4) wird eine exakte Menge der Substanz (3) aus einem Vorratsbehälter (15) nachgefüllt. Dazu ist ein Zwischenbehälter (25) vorgesehen, der mit einem Inertgas bis zu einem Druck P1 gefüllt wird. Der Vorratsbehälter (15) wird mit einem Inertgas (21) mit einem Druck P2 beaufschlagt, der größer als P1 ist. Der Zwischenbehälter (25) wird mit dem Vorratsbehälter (15) verbunden, wodurch eine bestimmte Menge der Substanz (3) in den Zwischenbehälter (25) strömt, welche über eine Verbindungsleitung (17) dem Blasenverdampfer (1) zugeführt wird, wobei die Verbindungsleitung (17) zuvor mit Inertgas (32) mit einem Druck P3 beaufschlagt wird, der kleiner als P2 ist.