Abstract: This relates to the provision of a vacuum indicator in a container wherein a product is vacuum packaged. Most specifically, an end unit for a conventional container is provided with a vent opening through which air rushes into the container when opened. There is secured to the underside of the end unit a whistle device in communication with the opening so that the inwardly rushing air actuates the whistle device and causes the whistle device to emit a whistling sound in accordance with the vacuum present within the container and thereby gives an audible indication of the freshness of the product.

Abstract: A vent cap for a container of housing which accommodates a hydraulic operating medium. The vent cap includes a housing type cover which has labyrinth walls. The cover is adapted to be closed by a base insert which includes a vent passage. The vent cap is adapted to be mounted on a vent opening of the container or housing. The housing type cover is rotatably mounted on the base insert.

Abstract: A cap for a liquid containing vessel has redundant tang portions for engagement with closure ramps of a host tank access filler tube. Sealing engagement between the cap and the filler tube cap retention ramps is enhanced through the utilization of pitched guide surface inclines on one of the tang elements.

Abstract: A cap and a base fit together to form the culture vessel. Adjacent the tops of the walls of the base is a rim which is "L" shaped in cross-section, consisting of a bottom leg joined to the base walls and an upright leg. Downwardly extending walls of the cap project into the space between this flange and the walls of the base. These cap walls have a plurality of spaced ribs which frictionally engage the walls of the base so that the cap will maintain a position in which it is slightly raised above the position wherein the cap is fully seated against the base. When in that raised position a length of cotton filtering material may be used between the bottoms of the cap walls and the bottom leg of the rim. The cap has an outside peripheral flange coplanar with the upright leg thereby permitting pressure sensitive tape to be applied to the two and bridging the space therebetween. Extending downwardly from the top, within the base walls and adjacent thereto, is a condensate drip flange.

Abstract: An annular sealing element, made of rubber or rubber-like synthetic material, for insertion between rigid surfaces resting upon each other. The sealing element is provided with at least one insert of textile fibers extending essentially transverse to the sealing direction, with the insert being covered by a rubber or synthetic material layer, yet exposed along its inner and outer periphery or surface.

Abstract: A filter cap made of resinous material, and includes a housing with ceiling wall, a circumferential wall, an atmospheric port formed in the circumferential wall, and edges having a slanting surface. The filter cap reliably ensures installation in various devices and improves the corresponding assembly and resulting work efficiency of such devices. The filter cap can house an air filter in a predetermined location and protect an associated air passageway from water and foreign deposits such as, for example, mud.

Abstract: A battery vent cap is presented for releasing gases from a battery container while preventing the escape of electrolyte foam. The cap comprises a strategically located reservoir containing an antifoam agent for dissipating foam attempting to escape. Further, minute amounts of agent are intermittently dispensed into the cell to reduce foaming therein.

Abstract: A piece of porous foil larger than the removable portion of the lid of a can is connected to the under surface of the removable lid portion and overlaps the edges defining the can opening on the interior surface of the lid, whereby liquid is prevented from spurting out of the can with escaping gas upon initial partial opening of the removable portion, and the piece of porous foil is fully removable with the removable lid portion.

Abstract: A filled synthetic plastics cask is sealed with a cover and into the interior of which there projects a preformed flexible plastic film. The film is impermeable to liquid but permeable to gas and is disposed between the cover and the upper rim of the cask. The film is folded in the rim zone of the cover such that upper and lower capillaries are formed. The cask is virtually sealed tight against egress of liquid. But the upper capillaries permit the escape of gas which has penetrated from the contents through said plastic film.

Abstract: A cap for a fuel tank such as is used with gasoline engines for chain saws, power mowers, snowmobiles, and the like, which require venting of the tank without danger of fuel leakage resulting from return flow through the vent passageway. The cap has an improved top wall assembly that provides the passageway that is utilized for the venting purposes and in which a check relief valve is housed.

Abstract: A disposable liner for the paint container of a conventional spray gun having a liner body formed from a pliable sheet material sized and shaped to closely fit the interior of the paint container and an annular collar formed from a more rigid plastic material secured near the open end of the liner body. The annular collar includes a cylindrical sidewall sized to snugly fit within the neck portion of the paint receptacle. A throw-away lid is also provided for closing the disposable liner and it is adapted to snugly fit a draw tube of the paint spray gun until it is forceably removed. The stiff plastic collar mates with the lid and allows repeated opening of the paint receptacle without ripping or tearing of the liner body in order that it might be refilled with paint as needed. In an alternative embodiment, a pair of locking means are provided on either side of both the collar and the lid of the liner.

Abstract: A vent and pressure relief system for locomotive fuel tanks includes a short standpipe supporting a baffled overflow vessel connected with a drain conduit. The standpipe is made high enough to prevent the overflow of the fuel therefrom during all operating and braking conditions of the locomotive, except for the moment of high deceleration which occurs only at the instant of a full stop. The overflow vessel is made large enough to contain any overflow of fuel from the standpipe occurring during a full stop, and includes baffling to prevent the loss of fuel out the drain conduit and fuel return means to return spilled fuel to the tank. The standpipe, overflow vessel and drain conduit are made large enough to provide an overflow path that prevents tank overpressure when filling, should the automatic equipment of the filling station fail to cut off when the fuel tank is full.

Abstract: A closure is provided for a container opening. The opening is defined by a neck extending outwardly from the top of the container. The closure includes a liner cap disposed both interiorly and exteriorly of the neck and defines a central passage. A plug extends across the top of the cap to close off the passage from the exterior. The plug is provided with at least one longitudinal hole. The lower end of the plug has attached thereto a membrane extending across the passage. This membrane does not permit liquids within the container to pass therethrough, but possesses the property of being capable of venting gasses therethrough. A dust cap may extend across the top of the closure during shipment and storage.

Abstract: A fluid reservoir, especially used in brake or clutch master cylinders of motor vehicles, comprises a fluid reservoir body made from a resin material, a resin cap attached to an inlet opening portion of said body, a rubber sealing member interposed between an inside face of said cap and said inlet opening portion of the body, and a spacer means made from a material other than rubber and disposed between said inside face of the cap and said sealing member so that it does not solidly adhere therebetween.

Abstract: A venting closure assembly extending across an access opening on the top part of a tank, particularly a milk tank. There is a venting closure member having perimeter flange members which fit against a support ring of the milk tank to form one or more circumferential venting channels. A cover having a vent opening fits over the closure member and engages the peripheral portions thereof to form a circumferential seal against the support ring. The venting channel or channels connect to circumferentially spaced openings on the flanges to provide venting from inside the tank to the area outside the tank, while preventing both spilling of the milk and contamination from outside sources.

Abstract: A fluid reservoir, especially used in brake or clutch master cylinders of motor vehicles, comprises a fluid reservoir body, a cap attached to an inlet opening portion of said body, a rubber sealing member interposed between an inside face of said cap and said inlet opening portion of the body, and a spacer means disposed between said inside face of the cap and said sealing member so that it does not solidly adhere therebetween.

Abstract: A plastic container includes a one piece plastic body portion having a cylindrical outer wall and a bottom wall, and a one piece cap portion having a cylindrical outer wall and a top wall. The outer wall of the cap has a snap fit around a portion of the outer wall of the body to hold the cap on the body. The top wall and the bottom wall have a plurality of small holes therethrough which allow gases and vapors to enter the container but prevent the contents of the container from leaving the container. The holes are in the shape of square truncated pyramids with the larger area ends of the holes being at the inside surface of the respective walls. A label may be secured around the cylindrical outer surface of the container across the junction between the body and the cap to help prevent removal of the cap from the body.

Abstract: A venting closure assembly extending across an access opening on the top part of a milk tank. There is a venting closure member having perimeter flange members which fit against a support ring of the milk tank to form one or more circumferential venting channels. A cover having a vent opening fits over the closure member and engages the peripheral portions thereof to form a circumferential seal against the support ring. The venting channel or channels connect to circumferentially spaced openings on the flanges to provide venting from inside the tank to the area outside the tank, while preventing both spilling of the milk and contamination from outside sources.

Abstract: A vented top for a bacteria culture medium tube having a body with through openings to hold one or more tubes simultaneously. A cap closes off all openings or opens them together. Vent means enable automatic venting of gases generated by the bacteria.

Abstract: A lid for a cooking utensil wherein a substantially flat central section has a rim thereabout for engagement with the cooking utensil. Depending from the central section is a recessed plate characterized by a plurality of venting holes therein. A sliding cover is presented over the recessed plate for opening or closing the venting holes and may be totally removed therefrom for cleaning purposes. A further venting hole is presented about the rim periphery to vent the cooking utensil independently of the recessed plate. A dome-shaped cover may be incorporated to provide a steam or heat chamber above the lid by capturing steam escaping through the holes in the recessed plate. Venting holes may also be provided in the dome-shaped cover to provide for steam escapement so as to limit the moisture condensation within the cover.

Abstract: Tracer gases are contained in a capsule which is closed-off by a fusible seal and placed within the interior of each fuel-pin can. The capsule is formed of material having a melting point above the operating temperature of the fuel pins within a nuclear reactor. The fusible seal is formed of material having a melting point below said temperature, with the result that the tracer gases are released into the interior of each fuel pin at that temperature.

Abstract: A closure to be slidably fitted in a container to exclude air from the surface of the material in said container or to be withdrawn to allow access to said material, includes a disc-like closure body, an air vent through said body, a plug to close said vent, a flexible handle attached to said body, characterized by a connection between said plug and said handle whereby force on said handle to withdraw said closure retracts said plug from said vent.