Abstract:
A check valve (10) for controlling a flow of fluid by fluid pressure, comprising a housing (11) and a resilient flexible valve element (12) inside the housing (11), wherein the valve element (12) is formed as a hollow and longitudinally tapered body (16) with an open wide end (18) and a closed narrow end (19), and wherein the wide end (18) of the valve element (12), in a default configuration, engages an inner surface of the housing (11) to close the check valve (10) and is deformable by a predetermined fluid pressure from the inlet (13) to open the check valve (10). The tapered body (16) comprises a radially outwardly projecting flange (17) at the wide end (18), which flange comprises a curved outer surface portion (20) having a degree of curvature of 85 to 95 degrees, wherein the housing (11) is formed with a protrusion (29) having a curved surface (30) for engaging the curved outer surface portion (20) of the flange (17).
Abstract:
Le dispositif de distribution comprend une valve de distribution comportant : un corps de valve (40); une tige d'actionnement (42), définissant un conduit de distribution du produit (62), et un organe de rappel (44) de la tige d'actionnement (42) vers une position de blocage. Le dispositif de distribution comprend un organe anti-retour (70) disposé à l'intérieur de la tige d'actionnement (42). L'organe anti-retour (70) comprend une partie (74) déformable entre une position fermée, appliquée contre une face latérale (61) de la tige d'actionnement (42), dans laquelle la circulation de fluide dans le conduit (62) à travers un orifice d'entrée (64) d'entrée de produit dans la tige est rendue impossible, et une position ouverte, éloignée de la face latérale (61) de la tige d'actionnement (42), dans laquelle la circulation de fluide à travers l'orifice d'entrée (64) est possible.
Abstract:
A valve with an internal member is disclosed which allows exhaled carbon dioxide to escape from a breathing circuit when the circuit gas pressure drops below a threshold pressure. The valve operates by occluding one or more ports under a relatively high pressure and opening the one or more ports under a relatively low pressure. The internal member is attached to the body of the valve at two or more locations on the internal member. The internal member moves in a direction perpendicular to the gas flow through the valve.
Abstract:
A radial flow non-return fluid valve assembly is disclosed which comprises a housing (12) including a cylindrical wall (13), and a circumferentially elongated opening (16), or a row of circumferentially spaced openings (16), in the wall (13) for enabling fluid to flow from an entrance side to an exit side of the wall (13), and a cylindrical spring collar (18) of circular cross section located on the exit side (14) of the wall (13). The resilience of the collar (18) acts in a direction to urge the collar (18) into contact with the exit side (14) of the wall (13) so as to obstruct the opening(s) (16) when the fluid pressure at the exit side is equal to or greater than the pressure on the entrance side, and the collar (18) is deformed when the fluid pressure at the entrance side exceeds the fluid pressure at the exit side to uncover the opening(s) (16) in order to allow fluid to flow through the openings in the wall (13). In the invention, one circumferential end of the collar (18) is anchored to the housing to leave a single span of the collar (18) free to separate from the exit side (14) of the wall (13), the length of which span extends over at least 60% of the circumferential length of the exit side (14) of the wall (13).
Abstract:
The present invention inter-alia relates to an apparatus comprising a diaphragm valve, wherein a diaphragm of said diaphragm valve is made from a substantially rigid material, having at least partially an flexible cross-sectional shape.
Abstract:
Elastomeric check valves for use, e.g., in small pump devices, may include a molded elastomeric valve body forming a pocket that extends from an opening at the valve inlet to a terminus inside the valve body, and having a slit extending from the terminus to a valve outlet.
Abstract:
The invention relates to a washing system for vehicle windows, especially for vehicle windscreens (1), comprising at least one nozzle opening (15) which is connected to a source (7) providing the cleaning and washing liquid under pressure, in order to eject the cleaning and washing liquid onto the vehicle window. Said system also comprises at least one check and bleed valve (11) in the liquid connection, which transfers the cleaning and washing liquid to the at least one nozzle opening when the washing system is activated, and bleeds the part of the liquid connection, between the at least one nozzle opening and the check and bleed valve, for drainage.
Abstract:
The present invention is directed to a pressure-responsive valve assembly (20, 120, 220) which functions in the nature of a check valve to control fluid flow across the assembly. The assembly (20, 120,220) includes a valve body (24, 124, 224) which defines first and second internal flow passages (32, 24; 132, 134; 232, 234), and includes a valve seat (36, 136, 236) through which at least one flow port (38, 138, 238) extends for joining the first and second passages (32, 34; 132,134; 232,234) in fluid communication with each other. A flexible, resiliency dθformable valve member (28, 128, 228) is positioned in operative association with the valve seat (36, 136, 236), and can be deflected, in response to a sufficient pressure differential, to move out of sealing engagement with the valve seat (36, 136, 236), to thereby permit fluid flow through the valve assembly (20 120, 220).
Abstract:
Die Erfindung betrifft einen Mikromischer zum Vermischen von mindestens zwei unter Bildung von Ausfällungen oder Suspensionen reagierenden Fluiden mit einem ersten Kanal für die Zufuhr eines ersten Teilstroms (6) und mit einem zweiten Kanal für die Zufuhr eines zweiten Teilstroms (7), die in schmalen Eintrittsspalten (19, 20) in eine Misch und Reaktionszone (10) münden und die Misch und Reaktionszone (10) über einen Auslasskanal (11) verlassen, dadurch gekennzeichnet, dass zwischen der Misch und Reaktionszone (10) und mindestens einem Kanal für die Zufuhr eines Teilstroms (6, 7, 37) eine Rückströmsperre angeordnet ist.
Abstract:
A drip irrigation line includes a plurality of emitter units (20) secured within a water supply tube (21) such that each emitter unit (20) defines with the tube (21) a flow-control passageway having an inlet port (23) communicating with the interior of the water supply tube (21) and an outlet port (24) communicating with a water discharge opening (22) in the water supply tube (21). Each emitter unit (20) includes a one-way valve (50) at one of the ports (23, 24). Such port (23, 24) has an opening circumscribed by a cylindrical boss (40, 70), and the one-way valve (50) thereat includes a cap (51) having a skirt (52) of elastomeric material normally engaging the outer surface of the cylindrical boss (40, 70) to block reverse water flow into the flow-control passageway, but is deformable under water pressure to permit forward flow from the tube (21) interior into the flow-control passageway.