Abstract: A check valve includes a housing that includes an inlet port, an outlet port, and a valve chamber. The inlet port extends from a ceiling of the valve chamber to an outer surface of the housing. The outlet port extends from a floor of the valve chamber to the outer surface of the housing. The check valve further includes a valve member supported within the chamber. The valve includes a valve head. When an upstream pressure is applied to the valve, the valve head is configured to deflect away from the ceiling of the valve chamber and unseal the inlet port. When a downstream pressure is applied to the valve, the valve head is configured to deflect away from the floor of the valve chamber and seal the inlet port such that the valve head conforms to a shape of the ceiling of the valve chamber.

Abstract: A valve for controlling a flow of a fluid comprises: a sealing plate comprising a plurality of ports for passage of the fluid through the sealing plate in a direction substantially perpendicular to the plane of the sealing plate; and a plurality of valve members, each valve member comprising at least one anchor portion arranged in fixed relationship with the sealing plate and a closure portion which is contiguous with the anchor portion and in movable relationship with the sealing plate under a differential pressure of the fluid across the valve, the closure portion being movable away from the sealing plate under a first differential pressure direction to open at least one of the ports and toward the sealing plate under a second and opposite differential pressure direction to close said at least one of the ports.

Abstract: Pressure valve for a liquid comprising a housing with an inlet and an outlet for directing the liquid from the inlet through the housing to the outlet along a flow direction, wherein valve further comprises movable member which is movable in the housing towards and away from the outlet between a blocked position wherein the movable member blocks the outlet and an unblocked position wherein the movable member is moved away from the outlet in a direction opposite the flow direction.

Abstract: A check valve assembly includes a first port fitting and a second port fitting with a base secured therebetween. The base has an annular sleeve encircling a seat, the seat having a central mounting hole and one or more flow channels passing therethrough. An umbrella valve includes a flexible sealing disk having an outer surface and an opposing inner surface, a mounting stem extending from the inner surface and projecting into the mounting hole of the base, the sealing disk being movable between a first position wherein at least a portion of the sealing disk sits on the seat so as to cover the one or more flow channels and a second position wherein the sealing disk is resiliently flexed so as to at least partially uncover the one or more flow channels. A retention plate is disposed between first port fitting and the seat of the base so that the retention plate sits against the outer surface of the sealing disk.

Abstract: Check valve assemblies for fluid flow sets and devices are provided. The check valve assembly includes an inlet body including a fluid inlet, a first seal bead and a second seal bead, and an outlet body including a fluid outlet. A seal includes inner and outer rings, wherein, in a fully sealed position of the check valve assembly, the inner ring is configured to engage with the first seal bead and the outer ring is configured to engage with the second seal bead. Fluid flow sets and methods for manufacturing check valve assemblies are also provided.

Abstract: Disclosed is a shock absorber.

Abstract: A valve assembly is provided. The valve assembly includes a body having an annular valve seat. A central ring is concentric with the annular valve seat, and a plurality of vanes extend radially between the central ring and the annular valve seat. A receiver is defined by an axial through hole in the central ring and an annular outer lip adjacent the through hole. The outer lip includes a plurality of circumferentially spaced notches disposed in an inner perimeter of the lip. The assembly also includes an umbrella valve having a flexible, disk-shaped cap and an elongated stem extending axially from a center of the cap. The stem has an enlarged portion proximate a terminal end that is received through the outer lip and into the receiver to secure the umbrella valve in the central ring. A fuel reservoir and a method of making the valve assembly are also provided.

Abstract: Disclosed is a fluid trap for use with, or comprising part of, a respiratory therapy system, d particular comprising part of, or configured to be connected to, a breathing limb, such as an expiratory limb, of a respiratory therapy system. The fluid trap comprises a container configured to contain fluid received from an inlet; a closure, the closure and container being configured to be removeably mounted together to close the container; and a valve configured to be removeably mounted on at least one of the container and the closure, and configured to be in a closed condition which prevents fluid from flowing through the inlet when the closure is not mounted on the container, the valve being further configured to be in an open position which allows fluid from the inlet into the container when the closure is mounted on the container.

Abstract: A vent plug and method are provide for isolating a feature of a part. The vent plug includes a plug receivable in an opening in the part to form an airtight seal between the plug and the surface of the part. A stem is receivable in a bore through the plug. The stem includes a cap and a collar. The cap has a sealing surface extending radially from an outer surface of the stem and engageable with a first surface of the plug such that sealing surface overlaps a vent hole extending through the plug. The collar extends radially from the outer surface of the stem and captures the plug between the collar and the cap.

Abstract: A nonreturn valve (10) for a compact ventilation system (100), includes a recoil membrane (20) and a holding element (40) for holding the recoil membrane (20) and for fastening the nonreturn valve (10) at a flow duct (110) of the compact ventilation system (100). The recoil membrane (20) has at least one mechanical stabilizing section (22) for cooperating with at least one mechanical counter-stabilizing section (42) of the holding element (40) or of the flow duct (110) of the compact ventilation system (100). At least one opening section (24) is provided for the defined movement of the recoil membrane (20) during the opening of the nonreturn valve (10) and a holding section (26) is provided for holding the recoil membrane (20) at a counter-holding section (46) of the holding element (40). A compact ventilation system (100) is provided with such a nonreturn valve (10).

Abstract: A check valve includes a housing that includes an inlet port, an outlet port, and a valve chamber. The inlet port extends from a ceiling of the valve chamber to an outer surface of the housing. The outlet port extends from a floor of the valve chamber to the outer surface of the housing. The check valve further includes a valve member supported within the chamber. The valve includes a valve head. When an upstream pressure is applied to the valve, the valve head is configured to deflect away from the ceiling of the valve chamber and unseal the inlet port. When a downstream pressure is applied to the valve, the valve head is configured to deflect away from the floor of the valve chamber and seal the inlet port such that the valve head conforms to a shape of the ceiling of the valve chamber.

Abstract: An embodiment includes a valve comprising: a valve channel that couples a valve input to a valve output; a one-way valve included within the channel; a filter; a first pressure relief port, wherein the first pressure relief port is configured to relieve negative pressure when pressure at the valve output is less than pressure at the valve input; a second pressure relief port, wherein the second pressure relief port is configured to relieve positive pressure when pressure at the valve output is greater than pressure at the valve input; wherein the one-way valve includes a monolithic portion that simultaneously seals the channel, the first pressure relief port, and the second pressure relief port; wherein the filter covers the first pressure relief port.

Abstract: A check valve assembly includes a first port fitting and a second port fitting with a base secured therebetween. The base has an annular sleeve encircling a seat, the seat having a central mounting hole and one or more flow channels passing therethrough. An umbrella valve includes a flexible sealing disk having an outer surface and an opposing inner surface, a mounting stem extending from the inner surface and projecting into the mounting hole of the base, the sealing disk being movable between a first position wherein at least a portion of the sealing disk sits on the seat so as to cover the one or more flow channels and a second position wherein the sealing disk is resiliently flexed so as to at least partially uncover the one or more flow channels. A retention plate is disposed between first port fitting and the seat of the base so that the retention plate sits against the outer surface of the sealing disk.

Abstract: A terminal block (1) with an elastic retracting fixation member, including an insulation base (10) having a cavity (13) and a cable insertion slot (14) communicating with the cavity (13), a cover member (20) covering the insulation base (10) and having a tool access hole (23), a conductive assembly (30) arranged in the cavity (13) and having a carrying member (32), and an elastic retracting fixation member (40) arranged corresponding to the tool access hole (23) and having an elastic element (41) and a fixation element (42), the elastic element (41) arranged between the fixation element (42) and the cover member (20), the fixation element (42) being operatively disengaged from the cover member (20) to attach to the carrying member (32) and retracting into the cover member (20) via a recovery force of the elastic element (41). Accordingly, it is able to prevent disengagement of the fixation member effectively.

Abstract: Described is a resilient fluid control valve assembly. The resilient fluid control valve assembly includes a cartridge housing having an upper portion and a lower portion. The upper portion is formed to reside above a drain opening, while the lower portion is formed to reside within the drain opening. The resilient fluid control valve assembly further includes a resilient fluid control valve positioned within the cartridge housing. The resilient fluid control valve has a valve body portion and a sealing portion. When positioned within the cartridge housing, a portion of the valve body portion resides above the drain opening, and a portion of the sealing portion resides within the drain opening.

Abstract: The present disclosure relates to a drip device, including a drip bottle having a bottle mouth facing downward, since the bottle mouth faces downward, a liquid in the drip bottle is charged into a first connecting tube, an infusion channel, and a piston chamber when a pressing head is not pushed upward, a plug blocks a drip port, and the liquid cannot flow out from the drip port. When the pressing head is pushed upward to move the pressing head upward relative to a connecting cover, a piston head inserts into a piston chamber to separate the infusion channel from the piston chamber, the pressing head continues to move upward, a volume of the piston chamber is compressed, the liquid in the piston chamber will flow back to the drip bottle through a liquid outlet, and a volume of the infusion channel is also compressed.

Abstract: A respirator 10 that has a mask body 12 and a harness 16 has an exhalation valve 23 that includes a valve seat 36 and a flexible flap 42. The valve seat 36 has an orifice 38 and has a noncircular seal surface 40 surrounding the orifice 38. The flexible flap 42 is secured to the valve seat 36 at a centroid of the orifice and has a variable stiffness structure. The variable stiffness structure allows the flap to equally deflect under a given load at different distances from the centroid at the noncircular seal surface. An exhalation valve having this construction may beneficially optimize pressure drop and overall valve performance for applications where valve space may be limited.

Abstract: A bracket of a cylinder device includes: a tubular portion having a C-shaped cross section, holding an outer periphery of the outer shell, and having a slit in a front portion; and a pair of mounting portions and protruding outward in the radial direction from both ends of the tubular portion in the circumferential direction. The tubular portion includes a hole formed to permit insertion of the protrusion, from at least one side portion to the back portion of the tubular portion.

Abstract: A catheter system may include a catheter assembly, a fluid storage unit, and fluid. The catheter assembly may include a catheter hub, a catheter, an extension tube, and an adapter. The catheter hub may include a distal end, a proximal end, a lumen extending between the distal end and the proximal end, and a side port. The catheter may extend distally from the distal end of the catheter hub. A distal end of the extension tube may be coupled to the side port. The adapter may be coupled to a proximal end of the extension tube. The fluid storage unit may be coupled to the adapter and may include a reservoir, a barrier, and an actuator. The fluid may be disposed within the reservoir. In response to breach of the barrier by the actuator, the reservoir may be in fluid communication with the lumen of the catheter hub.

Abstract: A pressure relief valve is provided that includes a housing and a flap. The housing includes a plurality of receptacle members with openings therebetween, and the flap is configured to be accepted by the housing and to contact the receptacle members in a closed position. Further, the flap covers the openings and inhibits airflow through the openings in a closed position, and the flap is biasable to allow airflow through the openings in an open position.

Abstract: A seal and vent assembly for a constant velocity joint including a vent plate for being disposed in a compartment of the constant velocity joint. The vent plate defines a mounting aperture. A vent valve is received in the mounting aperture for sealing the compartment of the constant velocity joint. The vent valve has a body portion extending along an axis and received by the mounting aperture and a rim portion extending from the body portion into engagement with, and biased against the vent plate. The vent valve defines a chamber between the rim portion, the body portion and the vent plate. A venting channel fluidly connects the chamber of the vent valve and the compartment of the constant velocity joint. The vent plate defines the at least one venting channel.

Abstract: Herein a sealing valve arrangement (2) for a fluid container is disclosed. The sealing valve arrangement (2) comprising a valve body (4), a flexible sealing valve (8), and a supporting element (14). The flexible sealing valve (8) comprises a sealing surface (10) and is situated in the second longitudinal portion (17) between an intermediate surface (18) and the supporting element (14). A centrally arranged recess (12) of the flexible sealing valve (8) forms a blind hole and the sealing surface (10) abuts against the intermediate surface (18), such that the flexible sealing valve (8) enables a fluid flow thought the through hole (6) only in a direction from the first longitudinal portion (15) to the second longitudinal portion (17) and the channel (16). Further a fuel tank for a hand-held power tool comprising a sealing valve arrangement is disclosed.

Abstract: A sealing plug arrangement for sealing a combined filling and degassing opening of an accumulator. The sealing plug arrangement includes at least one valve part, one valve holder, and one sealing plug. The valve part is arranged on the valve holder and forms an openable valve mechanism with the valve holder for sealing at least one interior space of the accumulator from the surrounding area upon pressurization. The sealing plug includes at least one fastening means for fixing to the filling and degassing opening and at the same time subjecting the valve part to a pretensioning force toward the valve holder. The valve holder includes at least one extension axially projecting toward the valve part which is formed as a circumferential sealing edge on a surface facing the valve part on which the valve part rests.

Abstract: An air venting system for a constant velocity joint (20) having an inner race (24), an outer race (22), a cage (26), a plurality of torque transferring elements (28), a drive sleeve, a drive nut and a boot assembly. The outer race has a wall portion (90) having a vent hole (88, 242) with a first and a second axially extending channel (224, 264). A radially extending wall integrally connects the second axially extending channel to the first axially extending channel. A valve (256) having a stopper portion (264), a disk portion (258) and a breather portion (260) is at least partially located within the vent hole. The breather portion (260) further includes an axially extending ring (292) that terminates in a radially extending wall. At least a portion (300) of an edge portion of the radially extending wall of the breather portion of the valve is in direct contact with at least a portion (250) of an outer surface of the wall portion of the outer race.

Abstract: The invention relates to a self-closing dispensing head for a pressurised container having a dispensing valve for dispensing media, in particular viscous, self-foaming and/or gel-type products, the dispensing head (1) having an outlet (3) which can be closed by a closing element (6).

Abstract: A volume pump transfers a transfer fluid by expanding and contracting a bellows, and includes: the bellows that is capable of expanding and contracting, and has a bottomed cylindrical shape forming a pump chamber on its inside; a suction valve provided on a suction side of the pump chamber to guide the transfer fluid into the pump chamber; and a discharge valve provided on a discharge side of the pump chamber to discharge the transfer fluid from the pump chamber. The suction valve and the discharge valve each include a valve seat and a valve body. The valve body is configured from a flexible material and has: a fixed section whose positional relationship with the valve seat is fixed; and a valve section that extends in a certain direction between a direction directed from the fixed section to the valve seat and a direction that the transfer fluid moves.

Abstract: A priming valve includes a fluid flow path, a fluid inlet configured to couple to a fluid outlet of a fluid channel including at least one sensor configured to characterize at least one attribute of a fluid, a fluid outlet, a valve seat, and a connector. The connector engages the valve seat to prevent fluid flow via the fluid flow path. The connector is configured to move relative to the valve seat in response to a threshold pressure within the fluid flow path to allow the fluid to flow via the fluid flow path. A flow sensor sub-assembly for sensing flow of a fluidic medicament may include a priming valve and at least one sensor of a fluid port configured to characterize at least one attribute of a fluid within an administrable fluid source. A method for readying a fluid sensor may use a priming valve.

Abstract: Systems and methods are provided herein that generally involve shunting fluid, e.g., shunting cerebrospinal fluid in the treatment of hydrocephalus. Self-cleaning catheters are provided which include split tips configured such that pulsatile flow of fluid in a cavity in which the catheter is inserted can cause the tips to strike one another and thereby clear obstructions. Catheters with built-in flow indicators are also provided. Exemplary flow indicators include projections that extend radially inward from the interior surface of the catheter and which include imageable portions (e.g., portions which are visible under magnetic resonance imaging (MRI)). Movement of the flow indicators caused by fluid flowing through the catheter can be detected using MRI, thereby providing a reliable indication as to whether the catheter is partially or completely blocked.

Abstract: The present invention concerns a fluid stop valve unit comprising at least one fluid stop valve and a pressure responsive part, integrated or separate, arranged so that the at least one fluid stop valve is kept in a closed state. The pressure responsive part, integrated or separate, has an opening characteristic going from the closed state to an open state with a decrease of pressure after a threshold pressure has been reached.

Abstract: Disclosed herein is a powder container for supplying coating powder to a powder coating station. The powder container includes a powder compartment for coating powder, the powder compartment being delimited by side walls, one of which is provided with an outlet port via which the powder compartment is or can be fluidically connected to an inlet of a powder deposition system. The effective flow cross-section of the fluid connection between the outlet port and the inlet of the powder deposition system can be variably adjusted.

Abstract: Embodiments relate to a valve arrangement for a fuel injection system, including a valve disc that has a valve opening. A deformable valve sheet that is movable in a movement direction is provided to open and close the valve opening, and a valve shaft of a movement-activation arrangement, provided to activate the movement of the valve sheet, is secured to the valve sheet. The embodiments also relate to a high-pressure pump which includes the valve arrangement.

Abstract: A resealable vacuum valve for sealing a canning jar has an annular vacuum interface ring, a vacuum interface ring surface, and a valve interface bottom surface opposite the vacuum interface ring surface. A sealing membrane is interior to the vacuum interface ring. An anchor stem is fixedly attached to and extending from the bottom of the sealing membrane. At least one air evacuation hole is disposed through the sealing membrane interior to and equidistantly around the interior of the vacuum interface ring. With the anchor stem of the vacuum valve extended through a hole disposed in a lid placed onto a canning jar, a vacuum is applied to the vacuum valve removing air from inside the canning jar through the air evacuation holes such that the vacuum seals the sealing membrane bottom surface to the canning jar lid while sealing the canning jar lid to the canning jar.

Abstract: A drainage valve intended to be implanted and to drain the cerebrospinal fluid, including: a body defining a chamber into which there open an inlet port and an outlet port, a stopper capable of at least partially, or indeed completely, closing off the inlet port, a resilient return member exerting a resilient push force on the stopper towards the inlet port in order to open or close the port, a rotor housed in the chamber, able to rotate about an X-axis pivot and including a cam track on which the resilient return member rests such that the force exerted by the resilient return member on the stopper is modified by the rotation of the rotor.

Abstract: A suspension apparatus may include an internal cylinder having fixing grooves, an intermediate cylinder rotatably provided around the internal cylinder to allow a shock-absorber to be moved up and down, and having connection holes, an external cylinder rotatably provided around the intermediate cylinder and having locking pins to be inserted into the fixing grooves through the connection holes such that the locking pins are decoupled from the fixing grooves, but remain inserted into the connection holes, and a driving device connected to the external cylinder to rotate the intermediate cylinder to allow the shock-absorber to be moved up and down, adjusting a height of a vehicle body.

Abstract: An air-conditioning system for air-conditioning an interior of a vehicle may include a fan for driving air. The system may include a control device that may include a circulating air inlet for drawing in circulating air from the interior, a fresh air inlet for drawing in fresh air from an environment of the vehicle, and an air outlet. The control device may include a control valve adjustable between a circulating position and a fresh air position. The control valve may include at least one non-return check valve. The non-return check valve may permit a flow to pass through the control valve in one direction and block the flow in an opposite direction.

Abstract: A respirator 10 that has a mask body 12 and a harness 16 has an exhalation valve 23 that includes a valve seat 36 and a flexible flap 42. The valve seat 36 has an orifice 38 and has a noncircular seal surface 40 surrounding the orifice 38. The flexible flap 42 is secured to the valve seat 36 at a centroid of the orifice and has a variable stiffness structure. The variable stiffness structure allows the flap to equally deflect under a given load at different distances from the centroid at the noncircular seal surface. An exhalation valve having this construction may beneficially optimize pressure drop and overall valve performance for applications where valve space may be limited.

Abstract: A baffle plate (41, partition member) is manufactured by being integrally formed of a single material including flexible or pliable NBR (nitrile rubber), and a projection (51) formed on an abutment surface (42B) of the baffle plate (41) is fitted into a recess (52) in a reduced-diameter portion (36) of an intermediate tube (20). Thus, when the intermediate tube (20) fitted with the baffle plate (41) is assembled into an outer tube, the sheet-shaped baffle plate (41) can be prevented from rotating about a connecting pipe (23), and it is possible to improve the productivity and assembleability of the shock absorber.

Abstract: Disclosed is a check-valve assembly for use in a vacuum system. The check-valve assembly of the present invention comprises a body having a plurality of through-holes formed therein while having different space characteristics. As a valve member rotates with a shaft fixed to the body, intake holes of the valve member selectively communicate with the through-holes. Accordingly, the check-valve assembly of the present invention can more quickly respond to vacuum characteristics required on site, which is advantageous.

Abstract: A ventilation or check valve for ventilation or outlet openings of compressed air apparatuses of vehicles, includes at least one diaphragm disk which is made from flexible material, is held with a central region in a bore of a valve housing and is prestressed with a radially outer region against a valve seat on the valve housing, to lift up from the valve seat in a pressure-induced manner in the case of a pressure gradient between an inlet space and an outlet space or atmosphere and to open a flow cross section between the inlet space and the outlet space or atmosphere, in which, as viewed in the circumferential direction of the diaphragm disk, a plurality of hold-downs which are arranged at a circumferential spacing from one another and hold down the radially outer region of the diaphragm disk locally against the valve seat are provided on the valve housing.

Abstract: A beverage producing machine is disclosed, comprising: a housing (3); a supporting surface (23) on which a beverage collecting container (C) can be placed; and a beverage dispensing nozzle (13) arranged above the supporting surface. The machine further comprises a movable auxiliary surface (25) which is combined to the supporting surface and is movable between an operating position and a rest position. In the operating position the movable auxiliary surface is parallel to the supporting surface. In the rest position the movable auxiliary surface is removed from the supporting surface. Moreover the dispensing nozzle (13) is movable between a first position for dispensing a beverage in a container placed on said supporting surface, and a second position for dispensing the beverage in a container placed on the movable auxiliary surface (25).

Abstract: An ejection chip is disclosed, and comprises a substrate, a flow feature layer, a nozzle plate, and one or more valves. The substrate includes one or more fluid channels and one or more fluid ports each in communication with at least one of the one or more fluid channels. The flow feature layer is disposed over the substrate, and the flow feature layer include one or more flow features each in communication with at least one of the one or more fluid ports.

Abstract: Systems and methods are provided herein that generally involve shunting fluid, e.g., shunting cerebrospinal fluid in the treatment of hydrocephalus. Self-cleaning catheters are provided which include split tips configured such that pulsatile flow of fluid in a cavity in which the catheter is inserted can cause the tips to strike one another and thereby clear obstructions. Catheters with built-in flow indicators are also provided. Exemplary flow indicators include projections that extend radially inward from the interior surface of the catheter and which include imageable portions (e.g., portions which are visible under magnetic resonance imaging (MRI)). Movement of the flow indicators caused by fluid flowing through the catheter can be detected using MRI, thereby providing a reliable indication as to whether the catheter is partially or completely blocked.

Abstract: Filler cap for fuel tank which can further prevent environmental pollution without releasing harmful gas evaporated from fuel in fuel tank and can improve fuel efficiency is provided. When vaporized gas is generated in fuel tank, inner pressure of fuel tank is increased to pressure for deformation strength prescribed to valve body or more, a central part of valve body enters into third space thereby causing deformation so to shorten outer diameter of valve body to form wrinkles, and in peripheral part of valve body are formed a portion contacting to pivot of cylinder main body when deforming and concave portion not contacting thereto, second space and third space are connected via space of this concave portion and air passage channel formed in wall surface forming second space to release excessive pressure to outside fuel tank thereby bringing pressure inside fuel tank to lower than the pressure for deformation strength.

Abstract: A surgical device that absorbs fluid material on a surface of a cannula comprises a handle, and an absorbent portion coupled to a first end of the handle. The absorbent portion comprises a plurality of absorbent discs separated by at least one spacer. The plurality of absorbent discs and the at least one spacer are disposed about a post, and the at least one spacer is restrained from axial movement relative to the post.

Abstract: A manually-activated reduced pressure treatment system includes a substantially rigid housing, and an end cap slidingly received by the housing. An inner chamber is disposed between the end cap and housing, and a volume of the inner chamber is variable in amount depending on the position of the end cap within the housing. The end cap is slidingly movable between an uncompressed position at which the volume of the inner chamber is at a maximum value and a compressed position at which the volume of the inner chamber is at a minimum value. A position indicating member is associated with the end cap and housing to indicate the position of the end cap relative to the housing at predetermined positions between the uncompressed position and the compressed position.

Abstract: A drainage device of an electric power steering system has a drain case and a drain valve. The drain case has a groove portion formed in a peripheral edge portion of a case inlet. The drain valve has a main body, and a flange disposed so as to face the case inlet. The flange has a bulged portion bulged toward the case inlet, and an annular seal portion. When the seal portion is brought into tight contact with the peripheral edge portion of the case inlet, the drainage device is placed in a valve closed state to form an annular space between the groove portion and the seal portion. When the seal portion is elastically deformed to form a gap between the seal portion and the peripheral edge portion of the case inlet, the drainage device is placed in a valve open state.

Abstract: An air release vent valve used to vent air from a liquid filled pipeline, the air release vent valve having a float valve deployed in a float valve housing extending from the pipeline and a surge suppressing shutter valve deployed in a vent passageway extending from said float valve housing such that said surge suppressing shutter valve is downstream from said float valve. The surge suppressing shutter valve includes an elastic shutter element that is pre-shaped to a normally open position and is configured to gradually deform to a closed position as a velocity of air flowing through said vent passageway increase so as to dampen the force of the closure of air release vent valve and prevent a pressure surge within the pipeline. Once a liquid level in the pipeline reaches the float valve, a float is raised so as to fully closes the vent passageway.

Abstract: The invention relates to a vacuum pump, in particular a vane pump, having a pump housing in which an intake chamber is provided, and a pump housing opening which feeds into the intake chamber, wherein an intake check valve is arranged in the pump housing opening and communicates with the atmosphere or feeds into an external vacuum chamber, with the intake check valve being accommodated in a pot-shaped valve housing, and with the pot-shaped valve housing having a housing bottom and a housing jacket, wherein the housing bottom is connectable to the housing jacket and the housing bottom can be snapped onto the housing jacket.

Abstract: Disclosed is a bypass valve comprising a valve body. The valve body has a gas inlet and a gas outlet, wherein a check valve is provided at the air outlet. The check valve comprises a check valve body, a ventilation plate and a first sealing gasket. A first gas passage for gas delivering is provided within the check valve body; ventilation holes are provided on the ventilation plate; the ventilation holes are in communication with the gas outlet; the first sealing gasket is provided between the ventilation plate and the check valve body; and the first gas passage and the ventilation holes are in selective communication with each other via the first sealing gasket. The uni-directional check valve is provided in the gas air outlet in the bypass valve, causing the direction of the gas flow to be unique, overcoming the problem of imprecise concentration of the anaesthetic gas caused by the a gas backflow, and having the advantage of structural technology and better gas tightness.

Abstract: A vent system for an axle of a heavy-duty vehicle includes a check valve and an exhaust tube that is connected to the check valve. The check valve includes a first end that is mounted on the axle, a second end, and a body that is disposed between the first and second ends and is in selective fluid communication with the axle interior. The exhaust tube includes a first end that is mounted on the second end of the check valve, and a second end that is open to atmosphere and is in fluid communication with the check valve body. Using any one of a number of types of configurations for the valve body, the vent system selectively exhausts air from the axle interior to atmosphere to relieve buildups of pressure in the axle, while protecting the integrity of the check valve and preventing contaminants from entering the axle.