Abstract: A cover assembly of a secondary battery and a secondary battery. The cover assembly includes: a cover plate including a gas vent; a gas exhaust valve configured to seal the gas vent and deform in response to an increase in temperature to get out of a state of sealing the gas vent; and a protective part at least partially covering the gas vent and having a gas permeability coefficient smaller than a gas permeability coefficient of the gas exhaust valve.

Abstract: Liquid dispenser for discharging pharmaceutical liquid having a discharge head and a cap, the cap body of which has a ventilation opening. The dispenser includes an injection-moulded pull-off portion which, in the delivery state, covers the ventilation opening and is connected to the cap body by a substance-to-substance bond. The pull-off portion, together with a tamper-evident portion, which, with the dispenser in the delivery state, prevents removal of the cap body, is part of a common segment which is detachable from the cap body of the cap. Alternatively, the ventilation opening is provided with a filter membrane for filtering the air which flows through it, and the cap body includes two part-bodies which together form a receiving space for the filter membrane.

Abstract: A system for assaying biofluid samples including an assay apparatus and a dispensing apparatus. The dispensing apparatus includes cuvettes that contain reagents and the biofluid samples to form assay samples, and the assay apparatus has a receptable for receiving and sealing the cuvettes inside. Once the cuvettes are sealed in the receptable, the assay apparatus performs assay processes on the assay samples in the cuvettes.

Abstract: A bi-stable popper valve and a device for detecting blockage in a flow of a fluid are provided. The valve includes a membrane supporting two conformations: in a first conformation the membrane is convex in relation the upstream fluid, and in a second conformation the membrane can be concave in relation to the upstream fluid, such that in the first conformation the flow of the fluid through the membrane is prevented and in the second conformation the flow of the fluid through the membrane is permitted through an pore defined by the membrane in only the second conformation. The membrane changes from the first conformation to the second responsive to a pressure of the fluid meeting or exceeding an opening pressure value of the membrane. A sensor can detect a shift from the first conformation to the second conformation, indicating a flow, or absence of flow, of the fluid.

Abstract: A microwave pressure cooker including safety interlock mechanisms. A blow vent is provided in cooker lid, and a lock bar is pivoted to cooker lid in a position to block blow vent when lock bar is resting under its own weight. Free end of lock bar includes a lock tab. Lock tab extends through slot at periphery of lid. Cooker base includes handle with a cam section ending in a lock wall. Cooker lid is placed on base in a release position and rotated to a locking position. During this rotation lock tab rides over cam section and then falls adjacent lock wall, thus sealing blow vent. After cooking cover is physically prevented from rotating back to release position by lock tab abutting lock wall. User must physically lift lock bar to unseal blow vent to ensure internal pressure is released. A spline may hold lock bar in raised position.

Abstract: A resin lid for a container body with an opening in an upper part, including a body part that closes the opening and has an air hole, and a flap that includes a base, a hinge on a first end of the base, and a projection provided on a second end side of the base and fitted in the air hole. The flap is swingable around the hinge between a first position in which the projection fits in the air hole and a second position in which the air hole is open. The body part and flap are integrally formed. When the flap travels from the second to the first position, a tip of the projection comes into contact with a circumferential edge of the opening of the air hole on a side opposite the hinge, and the projection fits in the air hole as the flap elastically deforms.

Abstract: The present invention relates to a vacuum sealable container system comprising a container and a lid assembly having a movable valve insert. The valve insert includes a vacuum indicator for informing the user when a vacuum is present in the container. The valve insert is pneumatically movable within a chamber by way of a pump assembly to open and close a fluid communication between the container and the exterior of the container to remove fluid to form the vacuum. The vacuum indicator collapses into an opening formed in the lid assembly to inform the user of the vacuum as well as reinforce the seal formed by the valve insert.

Abstract: The invention relates to a pressure relief valve (2) for a packaging container (1), comprising a base plate (3), which can be fastened on a wall of the packaging container and has a valve opening (9), also comprising a membrane (4), which is arranged on the base plate (3) over the valve opening (9), wherein the membrane (4) has an adhesive on one side, and further comprising an intermediate layer (6), which is adhesively bonded to the adhesive-containing side of the membrane such that the membrane (4) has two remaining, parallel adhesive-containing peripheral zones for fastening on the base plate (3), wherein the membrane (4) is arranged on the base plate by way of the intermediate layer (6) such that a channel zone (14) is formed on the base plate (3), this channel zone covering over the valve opening (9) and resting right up against the base plate in the closed position.

Abstract: A container includes a lid adapted to seal with a base. The lid and base rims each have vertical segments that mate upon sealing the container. The mating segments form a vertical seal zone. The vertical seal zone has a width extending across the rim surfaces. One or more vent channels are disposed on either or both rims. Each vent channel extends partially into the vertical seal zone. When pressure inside the container reaches a critical level, the lid rises and reduces the width of the seal zone, creating a vent point. Pressurized vapors traveling through the vent channel overcome rim-engaging forces at the vent point and pass through the engaged rims. Once pressure is purged, the lid descends and resumes its sealed arrangement with the base. The rims may respectively include horizontally oriented segments that engage each other to from a horizontal seal zone.

Abstract: A variable volume container comprises a sidewall, a base having a ribbed region, and a diaphragm. The ribbed region has a plurality of concentric ribs extending from the diaphragm, and flexure zones between each rib. The flexure zones allow for accordion-like movement of the diaphragm in response to the internal pressure of the container. The ribs are characterized has having a uniformly arced interior curved surface and a distorted arced exterior curved surface. The ribs are four to eight times the width of the flexure zones, and the flexure zones have an exterior surface shorter than its bottom surface. During vacuum sealing, these features allow the diaphragm to retract upward to reduce the volume of the container while maintaining shape and structural stability of the container. This is especially useful for food packaging operations where containers need to be able to withstand conditions such as high pressure, heat, and/or vacuums.

Abstract: A deformable small packaging structure for free-flowing products has a valve-like closure (10) produced by a two-component injection molding process and including a dimensionally stable carrier element (11) and an outer jacket (12) which envelopes the carrier element (11) at least in part and has a flexible squirt-nozzle (16) with slotted openings. The outer jacket (12), in relation to the withdrawn squirt-nozzle (16), has a meander-shaped configuration adjacent to the squirt-nozzle (16). The squirt-nozzle (16), in relation to the withdrawn state, is configured as a pot-shaped recess. The outer jacket (12) has an inner annular flange (17) which engages in a recess of the carrier element (11) and is firmly connected therewith. Further, the outer jacket (12) has adjacent to the inner annular flange (17) a circumferential web (18) which engages in a groove of the carrier element (11) and is also firmly connected therewith.

Abstract: Systems for storing beverages are disclosed, which include a container for storing, transporting and dispensing a beverage, e.g. beer. In some implementations the container includes a pressure-tight lid closure system including wire bails.

Abstract: A slow cooker having a thermometer such as a capillary thermometer and a graphic display device for indicating a temperature condition of the food product contained within the cooking vessel, the thermometer measuring the temperature of an outer surface of the cooking vessel and the graphic display device displaying the temperature measured by the thermometer but adjusted by a correlation factor to indicate at least an approximate temperature of the food product within the cooking vessel.

Abstract: A device housing, especially for accommodating an electronic unit or a mechatronic unit, has parts which are sealed against one another in assembled condition via an encircling, stationary seal. At least one pressure-relief device is integrated into the seal for admission of air into the housing. The seal is formed at least in part as a lip that opens under overpressure conditions inside the housing. To allow any water that has penetrated to flow away, the housing is mounted vertically, with the pressure-relief device disposed at the bottom.

Abstract: A method of making a one-way gas release valve for releasing gas pressure from within a coffee container comprises pre-oiling a relatively narrow dry strap of flexible material and laminating the pre-oiled dry strap between relatively wide ribbons of base and cover material with the dry strap overlying spaced vent patterns in the base material. Alternatively, the base material may be pre-oiled or both the base material and the dry strap may be pre-oiled. The dry strap and base may be made of PET and the cover may be made of mPET. Gas release valves are then die cut from the resulting web with each valve containing a vent pattern. Pre-oiling of the dry strap and/or the base can be accomplished through a roll metered process to insure that the oil is applied in precise amounts and with consistent thickness and coverage.

Abstract: A filler cap for a fuel tank wherein, when a pressure increases in the fuel tank, the valve body moves upward so an upper peripheral edge part of the valve body may be contacted to a first surface of shoulder cylinder portion, thereby shutting down a connection between a second space of cylinder main body and a third space connected to atmosphere. When the pressure in the fuel tank exceeds a pressure for a deformation strength of the valve body, a central part of the valve body enters into the third space causing deformation to shorten the outer diameter thereof; in the peripheral part of the valve body a concave portion not contacted to a lower end of a third surface that forms the third space, and the second space and the third space are connected via a space of this concave portion to release excessive pressure.

Abstract: The present invention relates to a drinking apparatus including a vent system that removably connects to a drinking container. The vent system is used to form a variety of leak free and essentially vacuum-free drinking containers. The vent system, includes a closure member and a valve, and may be used with an anti-bubble tube. The closure member may be a single member or may be formed of two portions. The valve may be coupled thereto or integrally formed therewith. The anti-bubble tube and valve function as a diving bell to generally prevent liquid from entering the anti-bubble tube.

Abstract: A vent valve, and a vent valve assembly, for a liquid dispensing container, employ a vent disc having small open vent holes in cooperation with an overlying thin flexible flap that covers and closes the vent holes to limit liquid pressure on the holes when the container is upright, yet require little suction pressure to move the flap to draw liquid or vent through the holes. The vent valve can be used in a bottom cap that is attachable to the bottom open end of the container. The vent valve assembly includes such a bottom cap, a sealing member for sealing the bottom cap to the container, and a vent valve. The vent valve and/or bottom cap have an elevated vent disc and a top portion having the thin flexible flap.

Abstract: A consumer product comprises a container for packaging a composition having a scent. A removable cap is fitted to the container, with the cap and the container defining a cavity therebetween. The cap has an orifice, for communicating between the cavity and an exterior of the cap, and a manually deformable part which is adapted to be displaceable thereby to displace air from an internal location within the cavity outwardly through the orifice.

Abstract: A closure with a flexible diaphragm that equalizes the internal pressure of a container to the external pressure. The closure may include an inner member having a generally cylindrical wall. The cylindrical wall may include internal threads capable of engaging with external threads of the container. The closure may also include an outer member including a generally circular cap body and an annular ring extending downward from the edges of the cap body. The annular ring shrouds at least a portion of the cylindrical wall. A flexible diaphragm may be operatively attached to the top of the cylindrical wall and spaced apart from the cap body. The flexible diaphragm deflects in response to the internal pressure of the container.

Abstract: The present invention provides a valve arrangement for location on a vessel for holding liquids, comprising: a supporting member configured to form a valve seat; a deformable sealing member located against said valve seat and arranged for deformation under an applied pressure to present a first gap between said sealing member and said valve seat in a region where pressure is applied to allow a liquid to be dispensed from the vessel via said valve arrangement, and a second gap between said sealing member and a valve seat in a region where pressure is applied, to allow air to enter said valve arrangement.

Abstract: Embodiments of a bunghole cover are disclosed. The bunghole cover may have a main body with a lower portion, and the lower portion may be configured to engage a bunghole of a storage drum. The bunghole cover may also have a sealing portion configured to substantially conform around one or more tubes inserted within the bunghole The bunghole cover may also have at least one connection mechanism configured to connect a first portion of the main body to a second portion of the main body.

Abstract: A vacuum breaker arrangement for use with a container includes body parts holding a resilient valve member captive. The valve member includes an intermediate body part, intermediate and enlarged head and a valve part. The valve part is made of resilient material which defines an internal passageway communicating with an opening in the body parts. The valve part includes an end portion defining a slit which is closed at a first pressure and which is automatically opened at a second, reduced pressure.

Abstract: The invention relates to a pressure relief valve (2) for a packaging container (1), comprising a base plate (3), which can be fastened on a wall of the packaging container and has a valve opening (9), also comprising a membrane (4), which is arranged on the base plate (3) over the valve opening (9), wherein the membrane (4) has an adhesive on one side, and further comprising an intermediate layer (6), which is adhesively bonded to the adhesive-containing side of the membrane such that the membrane (4) has two remaining, parallel adhesive-containing peripheral zones for fastening on the base plate (3), wherein the membrane (4) is arranged on the base plate by way of the intermediate layer (6) such that a channel zone (14) is formed on the base plate (3), this channel zone covering over the valve opening (9) and resting right up against the base plate in the closed position.

Abstract: A lid (18) for a drinking container (14) includes an engagement means (26) for removably securing the lid (18) to the drinking container (14). The lid (18) is formed as a one piece unit and has a deformable spout (20) with a liquid outlet (46). The one piece lid is further provided with an air inlet (22) for the ingress of air into the container (14). Defamation of the spout (20) effects opening of the liquid outlet (46) and the air inlet (22). The spout (20) may be disposed in a forward position on the lid (18). The container wall may lean in the forwards direction when the container is seated on its base (16) on a level surface.

Abstract: The invention relates to a pressure compensation device for compensating pressure between an inner chamber of a housing, in particular an electric motor, gearbox, container or the like and an outer side. The device includes a pressure compensation membrane mounted on an annular end face of a cylindrical structure that extends toward the outer side. The cylindrical structure is provided with a ventilation channel that extends therethrough. The cylindrical structure extends towards the outer side in order to form a projection from the wall of the housing, which projection is delimited by the end face on which the membrane is applied in a curved, dome-shaped form. A protective cover extends towards the outer side at a spaced apart distance in relation to the membrane over the cylindrical structure.

Abstract: A fluid dispensing valve is described which includes a valve housing having a wall which defines an internal cavity, and wherein a passageway is formed through the wall of the valve housing; and a valve control element having a continuous and deformable sidewall is coaxially and rotatably received within the internal cavity of the valve housing, and wherein at least a portion of the sidewall of the valve control element deforms when a vacuum is created in the internal cavity of the valve housing so as facilitate the controllable delivery of a source of fluid into the valve housing.

Abstract: A bottle cap for the introduction of pressure into a bottle, in which the bottle cap has a cap body configured with a through opening; and a one-way valve arrangement having at least one flexible valve component configured either with a through slit, such that the through slit is aligned with the through opening and an association between the cap body and the one-way valve arrangement maintains a planer profile of the flexible valve component after introduction of pressure into the bottle, or a flap valve integrally formed with the cap body, so as to prevent escape of pressurized gases from the bottle.

Abstract: A flexible vented end cap for a medical gas tube is provided. The end cap comprises a closed end and an open end, and having a side wall having fit beads spaced about the circumference of an interior surface and extending longitudinally along the interior surface parallel to the longitudinal axis of the end cap, the end cap further including at least one radial fit bead extending across at least a portion of the interior bottom surface of the end cap to permit gas communication between the interior of the medical gas tube when inserted into the end cap and the environment external to the end cap, and the closed end having an outwardly flared circumferential portion to serve as a finger grip, and the exterior bottom surface of the end cap being concave in configuration.

Abstract: A container lid for use with a container with a neck. The lid includes a top and bottom, a skirt extending downward from the circumference of the lid, and a circumferential flange extending radially outward from the lid. The skirt preferably includes at least one integral bead shaped to engage the neck or rim of the container. The lid preferably includes a convex center section including at least one vent. The at least one vent is preferably integral with the lid, and is opened by the steam pressure buildup inside the container when the contents are heated. When the cover is locked on the container, the skirt provides a seal against the outside of the container neck.

Abstract: A spill resistant cap for a container, such as a commercially available water or other beverage bottle, includes a cap body that forms a mating fit with the container and a spout having liquid dispense holes that allow fluid to flow out of the container. A removable valve is sized to fit within the cap body. The valve includes a valve mechanism that opens in response to a pressure differential applied across the valve face, such as the mouth suction applied to the spout when a person attempts to drink from the container, allowing fluid to flow through the valve and through the liquid dispense holes in the spout.

Abstract: A container is provided for holding a chemical compound or mixture. Areas are provided on the surface of the container which allow for gaseous by-products from the chemical contained within the container to permeate from a chamber through the surface of the container. A septum is over-molded into the surface of the container. The septum is formed in such a manner that it provides a sealing effect to close an opening in the container.

Abstract: A container for storing and injecting a liquid sealant for sealing and closing a puncture hole of a pneumatic tire includes a container body for storing the sealant. An outlet for injecting the sealant to outside opens in a lid securing portion of the container body, and an outer lid member having a sealant path therethrough is connected to the lid securing portion and communicates the sealant path with an interior space of the container body through the outlet. An inner lid member is press-fitted into the outlet and maintained in a closure position for tightly closing the outlet. The inner lid member can be forced from the closure position into inside of the sealant path, by the pressure of the sealant in the container body and/or by the pressure of gas above the sealant. A connector member connects the inner lid member to the lid securing portion or the outer lid member so as to be movable from the closure position to the interior of the sealant path.

Abstract: Fitting for attachment to a membrane of an inflatable device comprises a mounting adapter (1) to be secured to said membrane. A resiliently deformable part (5c) associated with said mounting adapter is arranged to embrace and hold an initially separate insert (2). The resiliently deformable part (5c) is arranged such that when the mounting adapter is secured to the membrane and exposed to a force exerted by fluid at one of two sides of the membrane, the resiliently deformable part is urged into applying engagement with the insert (2). A variety of different inserts (2) having different valve arrangements can be held by the mounting adapter.

Abstract: An opening-force-maximizing device of an underpressure-activated valve for a drinking container (2). The device includes a partition wall (6, 106, 206) enclosing an outlet opening (4) and being provided with a wall opening (8, 108, 208) in pressure-sealing contact with an axially movable valve sealing member (22, 122, 222) being in position of rest. It also includes a continuous membrane (12, 112, 212) being arranged to the container (2) and about a valve axis (14) through the wall opening (8, 108, 208). The membrane (12, 112, 212) has an axial extent and consists of an attachment end (12a, 112a, 212a) fixedly connected to the partition wall (6, 106, 206), and a movable maneuvering end (12b, 112b, 212b) placed at an axial distance from the attachment end (12a, 112a, 212a). The maneuvering end (12b, 112b, 212b) is arranged in a tensile-force-transmitting manner to said sealing member (22, 122, 222).

Abstract: The valve sealing system for a reagent package includes an annular cylindrical gasket seated in a channel formed in the package. A rocker valve on the package pivots relative to the annular cylindrical gasket which surrounds an opening to the chamber of the reagent package. The annular channel includes a radially inner peripheral channel sidewall, a radially outer peripheral channel sidewall, and a bottom portion. An inclined peripheral wall portion of the channel intersects one of the channel sidewalls at an obtuse angle and the bottom portion of the channel. When the rocker valve is in a valve closed position it engages the annular cylindrical gasket to provide a substantially leak-tight seal.

Abstract: A leak resistant drinking cup has a diaphragm seal for normally closing an open top of a liquid container of the cup. The seal can be opened to permit liquid to flow past it and out of the cup upon application of a vacuum pressure by the person, typically a small child, drinking from the cup. The diaphragm seal has a peripheral edge margin that can be deflected upward by the vacuum pressure to open a path out of the drinking cup. A hold down rib may be employed to control the locations where the peripheral edge margin is permitted to deflect.

Abstract: For dispensing volumes of liquids, a hinged septum has a flap inclined with respect to the longitudinal axis of a liquid channel. A deposition device deposits liquid on the flap, wherein the deposition device is arranged to contact the flap.

Abstract: This invention concerns a valve for an underpressure-activated outflow mechanism for a drinking receptacle (2). The valve includes a valve head (34) and a valve seat (44), in which the valve seat (44) is arranged in force-transmitting connection with a membrane (1), whereas the valve head (34) is fixed to the remaining structure via at least one stay (36).

Abstract: A container lid for use with a container with a neck. The lid includes a top and bottom, a skirt extending downward from the circumference of the lid, and a circumferential flange extending radially outward from the lid. The skirt preferably includes at least one integral bead shaped to engage the neck or rim of the container. The lid preferably includes a convex center section including at least one vent. The at least one vent is preferably integral with the lid, and is opened by the steam pressure buildup inside the container when the contents are heated. When the cover is locked on the container, the skirt provides a seal against the outside of the container neck.

Abstract: A food storage container includes a lid with a vent hole, and a removable cover removably secured to the lid to cover the vent hole. The cover has an evacuation hole. The food storage container further includes a one-way air valve disposed between the vent hole and evacuation hole. When the cover is secured to the lid, the one-way air valve inhibits air flow into the container through the vent hole, and when the cover is not secured to the lid, the one-way air valve allows air flow into the container.

Abstract: A beverage container for a carbonated beverage includes a floating hollow insert (1) comprising an upper moulding (2) and a lower moulding (3) defining a chamber for containing gas, a first one-way duck-bill type valve (4) integrally formed with the upper moulding (2) at the bottom of a down pipe (6) and arranged to allow gas to enter the chamber and a second duckbill valve (5) integrally formed with the lower moulding (3) and arranged to allow gas to exit the chamber and be jetted into the beverage upon opening the beverage container.

Abstract: A venting device for a drum. The venting device includes a body having a pair of opposing sides and defining a plurality of vent passages. The vent passages extend through the body and each an opening at each of the pair of opposing sides. The vent passages are spaced apart and arranged around a center portion of the body. A membrane structure is positioned so as to cover the openings of the vent passages on one of the pair of opposing sides of the body. The membrane structure is sealingly affixed to the body portion in an outer sealing band surrounding the openings of the vent passages. The membrane structure may be further affixed with one or more cross sealing bands extending across the membrane. A portion of the membrane structure may be further affixed to the center portion of the body. A protective structure may be attached to the body and positioned over the membrane structure.

Abstract: A valve for use with a cap for a spill resistant cup, the cap including a spout to dispense the liquid and a valve mount extending from the spout to engage with the valve. The valve includes a generally cylindrical valve tower extending from a valve base to sealingly engage the valve mount and having an interior bore for the passage of liquid and a valve face sloping across an upper end of the valve tower bore from a higher first point on a first side of the valve tower and to a lower second point on a diametrically opposite second side of the valve tower. A valve mechanism is located in the valve face for controlling a flow of the liquid through the valve mechanism dependent upon a pressure differential across the valve face. The valve mechanism is a valve slit extending through the valve face perpendicular to a mouth opening in the spout and is S-shaped or straight.

Abstract: A lid for a food storage container includes a lid body with a vacuum sense opening and a vent opening extending through the lid body, a releasable cover disposed over the vent opening, and a pressure-indicating protrusion. The cover impedes air flow into the container through the vent opening until the cover is released. The pressure-indicating protrusion, which has a cavity in it, is in hydraulic communication with the container through the vacuum sense opening. The pressure-indicating protrusion contracts toward the vacuum sense opening in response to negative container pressure.

Abstract: A packaging material is provided that can provide a packaging bag or container cover in which the contents is shielded from the atmosphere and tightly sealed, a small hole is formed in the appropriate locations, without special processing of the heat seal portion, and the internal pressure is maintained with high stability at a level above the normal pressure. The packaging material is suitable, for example, for heating in a microwave oven. The packaging material uses a film in which a heat sealing agent (4) with a low melting point is applied to a prescribed zone of an oriented film (2) made of a synthetic resin, a cutting line (5) is cut in the oriented film (2) made of a synthetic resin in the form of a solid or broken line passing through the zone coated with the heat sealing agent (4), and a cast film (3) made of a synthetic resin and having heat sealing properties is affixed to the oriented film (2) made of a synthetic resin. Such film is used for a packaging bag (1) or a container cover.

Abstract: A shaft part is coaxially provided within a pressure release port provided in a sealing plate sealed to an opening portion of a case for a condenser or a battery, a valve body closely fitted and fixed within the pressure release port has a seal lip which is directed toward the outside of a pressure container and is closely contacted with an outer peripheral surface of the shaft part with predetermined tensional force, and in the case that internal pressure of the case is increased more than a predetermined value, the seal lip is operated so as to open the valve, thereby releasing the internal pressure to the atmospheric air.

Abstract: A vacuum container for preserving food is disclosed herein that includes a cover member for covering an upper part of a container member in which food is filled, a piston member equipped with the cover member and ascending and descending movable, and first and second valve members that alternately operate by a pumping operation using ascending and descending operation of the piston member to make a suction aperture and an exhaust aperture alternately open and close, thus discharging air from within the container member. Such operation allows the interior of the container member to become a vacuum state, thereby allowing food within the container member to be preserved for a longer time period, in a more sanitary manner, and a simple manufacture and a low manufacturing cost to provide users with convenience.

Abstract: A venting device for a drum. The venting device includes a body having a pair of opposing sides and defining a plurality of vent passages. The vent passages extend through the body and each an opening at each of the pair of opposing sides. The vent passages are spaced apart and arranged around a center portion of the body. A membrane structure is positioned so as to cover the openings of the vent passages on one of the pair of opposing sides of the body. The membrane structure is sealingly affixed to the body portion in a sealing band surrounding the openings of the vent passages. A portion of the membrane structure is further affixed to the center portion of the body. A protective structure may be attached to the body and positioned over the membrane structure.

Abstract: A vehicle fuel or gas tank is subjected to either a build up of pressure or a negative pressure, and in view of this inlet and outlet vents are provided in the fuel cap to balance the pressure with the atmosphere, and this balance of fuel tank pressure is attained by covers of vents in the fuel cap and the covers having an umbrella or parabolic shape or the vents may be covered by reed valves. The disclosure of covers of vents as described in this invention then obviates the use of coiled metal springs to control vents in vehicle fuel caps.