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.

A pressure relief valve may comprise a housing, a disk, and a seal. The disk may be configured to deflect relative to the housing. The seal may form a sealing interface with at least one of the housing or disk. The pressure relief valve may be coupled to an inflatable slide or an aspirator.

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).

A pump apparatus (1) comprises a pump head (2) and a container (20) for a liquid to be dispensed. The pump head (2) has a flexible dispensing tube (4) in fluid connection with the inside of the container (20). The fluid connection between the dispensing tube (4) and the inside of the container (20) is provided by a supply tube (28) which co-operates with the dispensing tube (4) to provide a non-return valve function. An end (48) of the supply tube (28) is disposed within an end of the dispensing tube (4) and the non-return valve function is provided by a hole (46) through a side wall of the supply tube (28) in a region where the dispensing tube (4) overlaps the supply tube, whereby the dispensing tube (4) provides a seal over the hole (46) to prevent ingress of fluid when the internal pressure is lower than the external pressure. Another aspect of the invention provides a container (20) for use in the pump apparatus.

An inhalation device (1) comprising a compressor (2), an aerosol generator (3) and a pressure relief valve (4), wherein the compressor (2) is configured to provide a compressed gas for the aerosol generator (3) and the pressure relief valve (4) is configured to limit a pressure in the inhalation device (1).

The dispensing device comprises a dispensing valve comprising: a valve body (40), an actuating rod (42), defining a dispensing duct for the product (62), et a return element (44) of the actuating rod (42) to its blocking position.

The dispensing device comprises a non-return valve (70) arranged inside the actuating rod (42). The non-return valve (70) comprises a deformable portion (74) between a closed position, applied against a lateral face (61) of the actuating rod (42), in which the circulation of fluid in the duct (62) through an inlet orifice (64) for product entry in the rod is made impossible, and an open position, separated from the lateral face (61) of the actuating rod (42), in which the circulation of fluid through the inlet orifice (64) is possible.

A fluid control device (111) includes a valve section (12) and a blower section (13). The valve section (12) allows fluid to flow in one direction. The valve section (12) has the shape of a cylindrical container with a valve chamber (40) provided therein. The valve section (12) includes a top plate (21), a side-wall plate (22), a bottom plate (23), and a film (24). A plurality of ejection holes (41) and a plurality of auxiliary holes (49) arranged in a predetermined pattern are formed in a central region of the top plate (21). A plurality of communication holes (43) arranged in a predetermined pattern are formed in a central region of the bottom plate (23). A plurality of film holes (42) arranged in a predetermined pattern are formed in a central region of the film (24).

A connection system, in particular for a pressure reducer of a diving regulator, the system comprising a connector (1) having a first end (2) adapted to be fastened to a pressure reducer and a second end (2′) adapted to be fastened to a valve of a compressed air cylinder, said connector (1) having an internal passage (4) extending substantially axially between said first and second ends, said internal passage (4) including a filter (5), preferably made of sintered stainless steel, and a retaining member (6a; 6b; 6c; 6c′; 6d; 6e) fastened to said second end (2′) and supporting firstly said filter (5) and secondly a main O-ring (7; 9e), said retaining member (6a; 6b; 6c; 6c′; 6d; 6e) forming an inlet opening, said system including a shutter device comprising a shutter member (9a; 9b; 9c: 9c′; 9d; 9e) that is deformable and/or movable between a shut position in which it shuts said inlet opening, and an open position in which it does not shut said inlet opening, said shutter member (9a; 9b; 9c: 9c′; 9d; 9e) being urged resiliently towards its shut position and being deformed and/or shifted towards its open position by compressed air coming from said compressed air cylinder, said shutter member (9a; 9b; 9c: 9c′; 9d; 9e) being deformed and/or shifted towards its open position in a direction extending substantially transversely relative to the flow direction of the compressed air stream.

A respirator directional valve (10) includes a valve housing (12), a plurality of valve flaps (16-18), which can be moved by a gas stream or by a flowing medium and are arranged at the edge, and a number of support surfaces (20-22) as a valve seat. A number of support surfaces (20-22) corresponds to a number of valve flaps (16-18). Each valve flap (16-18) is adapted to a surface of a respective support surface (20-22). The support surfaces (20-22) are sloped in relation to a cross-sectional surface through the valve housing (12). The support surfaces (20-22) together form a tip pointing in the flow direction of the respirator directional valve (10). A method for manufacturing such a respirator directional valve (10) is provided including method features relating to the use of such a respirator directional valve (10).

A vehicle cleaning system includes a drive pump, an ejection nozzle and a valve device. The valve device includes an intake passage, a valve that closes the intake passage and accumulates pressure of the fluid supplied to the intake passage, a discharge passage, and an auxiliary mechanism. The auxiliary mechanism generates leakage of the fluid from the intake passage during the pressure accumulation to accumulate pressure with the leakage at a leaked side, opens the valve body based on two pressures accumulated in the intake passage and the leaked side, outputs the fluid, which is pressure-accumulated in the intake passage, to the discharge passage by opening the valve body, and closes the valve body as the fluid is output to the discharge passage to allow for re-accumulation of the pressure in the intake passage.