Abstract: A temperature regulated dual pressure radiator cap for an engine coolant system is disclosed having a temperature actuated valve that operates to normally open a large pressure responsive valve area to the coolant pressure below a predetermined coolant temperature and close communication therewith thereabove while then exposing the coolant pressure to a small pressure responsive valve area whereby the coolant pressure required for blow off is higher at coolant temperatures above such temperature.

Abstract: A unique temperature responsive operating mechanism is disclosed which is particularly suited for embodiment as a temperature responsive valve mechanism for use with a steam sterilization container. The mechanism includes a valve operating member which is movable by the action of a biasing spring from a first, opened position to a second, closed position with respect to an opening defined by the sterilization container. The mechanism further includes a temperature responsive, heat deformable member operatively associated with the biasing spring and the valve operating member to provide progressive movement of the valve operating member from its first to its second position in response to an elevation in temperature of the environment of the operating mechanism. Desired communication is provided between the interior and exterior of the sterilization container during a substantial portion of the steam sterilization process, with the mechanism subsequently tightly sealing the container.

Abstract: A heat activated vent for releasing an excess internal pressure in a container which pressure is accompanied by an abnormal rise in an internal temperature of the container uses a spring to store sufficient energy to propel a barb or spike to pierce a thin diaphragm. The spring is retained within a hollow vent housing between an end wall of the housing and a movable plate located within the housing and carrying a diaphragm piercing upright barb. A pierceable thin diaphragm is positioned adjacent to the sharp end of the barb and is arranged to provide a leak proof seal across an open end of the housing. The barb carrying plate is normally retained in a position wherein the barb is spaced from the diaphragm by a rigid pin extending between the plate and the housing and having a lower coefficient of thermal expansion than the housing. In one embodiment of the invention, one end of the pin projects through a hole in the plate and has a radially expanded head which engages the barb carrying plate.

Abstract: The heat activated vent for releasing an excess internal pressure in a container which pressure accompanied by an abnormal rise in an internal temperature of the container uses a spring to store sufficient energy to propel a barb or spike to pierce a thin diaphragm. A pierceable thin diaphragm is positioned adjacent to the sharp end of the barb and is arranged to provide a fluid tight seal across an open end of a hollow vent housing. The spring is in the form of a leaf spring having a diaphragm piercing upright barb at one end thereof while the other end of the leaf spring is supported in a fixed position within the housing. The end of the spring carrying the barb is normally retained in a position wherein the barb is spaced from the diaphragm by a preshaped end of a cantilevered beam of a material having a memory capability.

Abstract: A lawn mower is illustrated as including a carburetor having a float bowl adapted to contain a vent assembly for selectively venting the air space of the carburetor float bowl to the atmosphere when the internal combustion engine of the lawn mower is running and for precluding evaporation of fuel from the air space when the engine is not running. The lawn mower fuel tank also includes a vent assembly for selectively venting the fuel tank to the atmosphere when the internal combustion engine is running and for precluding evaporation of fuel from the fuel tank into the atmosphere when the engine is not running. Each vent assembly includes a valve member resting on a valve seat and supported for movement in response to vibration of the engine and in such a manner that the valve member will return to its position on the valve seat when the engine is shut off.

Abstract: A cap and valve assembly for a liquid reservoir has a cover in which is disposed a flexible valve member. The flexible valve member has an annular sealing portion engaging the reservoir and a diaphragm portion. An air chamber is formed between the diaphragm portion and the cover, which chamber expands and contracts in response to mechanical vibrations of the reservoir, whereby air is drawn from atmosphere and pumped to the interior of the reservoir. The valve member is spring-loaded when the cap assembly is secured to the reservoir in a manner to assist the annular sealing contact and to establish the at rest volume of the air chamber.

Abstract: A fuel tank cap for use in a motor vehicle including a cap body having a path communicating the interior of a fuel tank with the atmosphere and having incorporated therein a sensor valve unit. The sensor valve unit includes a valve housing having an upper wall with a first through-opening therein open to the path for communication with the atmosphere, a peripheral wall with a second through-opening at a predetermined position which is open to the housing interior and communicates with the fuel tank interior, an upright funnel shaped bottom wall, a weight ball movably positioned on the bottom wall, and a valve body resting on the weight ball so as to be moved upwards for closing the first through-opening when the weight ball rolls over the bottom wall and thereby carries out an upward movement.

Abstract: A vented fuel reservoir filler cap having a check valve positioned intermediate an inner surface of that cap and an annular gasket seated in the cap so that both the gasket and check valve will in turn be captured between the cap inner surface and the fuel reservoir filler when the cap is in the reservoir closing position is disclosed with the check valve comprising a disc-like support with an elongated valve cavity carried by the support and having openings near opposite ends thereof with a valve member captive within the valve cavity and movable between a position near one cavity end for closing the valve and a position near the other cavity end allowing the valve to remain open. The spit resistant characteristics of the cap are enhanced by providing a baffle intermediate the check valve and an aperture in the fuel cap for venting the reservoir and may be further enhanced by providing another baffle on the side of the check valve opposite the first baffle.

Abstract: A pressure-vacuum cap for a chamber such as an automobile gas tank having a normally upwardly extending filler neck formed with a peripherally and radially extending, upwardly facing sealing surface concentric with the longitudinal axis of the neck, the cap comprising a cover, a concentric housing extending downwardly from the cover into the filler neck and a gasket or gaskets providing a seal between the housing and the sealing surface, the housing providing a valve body having a centrally disposed, concentric passageway extending axially therethrough and in communication with the chamber. A pressure-vacuum valve assembly is disposed in that passageway for normalizing the pressure in the chamber, venting the chamber to atmosphere when the pressure in the chamber exceeds a predetermined superatmospheric level and when the pressure in the chamber drops below a predetermined subatmospheric level. The cap also provides, in addition to the pressure-vacuum valve assembly, a roll-over valve assembly.

Abstract: An emergency roof drain for floating roof storage tanks includes a siphon carried by the roof with an intake end above the roof and an outlet end below the roof. The siphon is normally closed by a valve and a valve operator is connected to open the valve in response to a predetermined emergency water level on top of the floating roof to thereby siphon the water from the roof and thus prevent sinking of the roof.

Abstract: Motor vehicle fuel tank cap of the air bleeder type which includes passages permitting external air to enter a fuel tank and so maintain air pressure in the tank at a level permitting correct feed of fuel to the motor vehicle engine and which includes an attitude-sensor valve unit which when the motor vehicle becomes inclined more than a certain amount with respect to the vertical closes the air passages, whereby leakage of fuel to the exterior of the fuel tank is prevented and risk of accident is avoided.

Abstract: In a vented cap for closing the filler neck of a liquid containing tank, the cap including a valve housing providing a venting passageway extending therethrough, the improvement comprising a roll-over valve member for closing the passageway when the filler neck is tilted. The valve housing provides a valve seat in the passageway facing inwardly and against which the valve member moves. The housing also provides a tubular portion extending inwardly from the valve seat, the valve member being moveable in that portion between a position in closing engagement with the seat and a position away from the seat. The tubular portion is provided with at least one vent port located between the positions of the valve member, the port being of a size sufficient readily to pass vapor therethrough and insufficient readily to pass liquid therethrough. When liquid enters the port from the tank, a pressure differential is created to drive the valve member into its closing position.

Abstract: A cylindrical fuel cap having a first chamber filled with vapor absorbent material, a second chamber filled with air filtering material, and a one-way check valve for establishing communication between the atmosphere and the interior of the fuel cap is placed in a fuel inlet line of a fuel tank to trap fuel vapors in the tank preventing them from being emitted to pollute the atmosphere and to provide a fuel vapor reservoir for augmenting the fuel used for combustion in an internal combustion engine, oil burner, and the like, upon demand.

Abstract: A valve apparatus for limiting the pressure of gases in an enclosed tank. The valve has a body mounted on the tank wall structure providing a passage into the tank chamber. A breather intake valve surrounds the body and allows air to flow into the tank chamber when sub-atmospheric pressure is present in the tank chamber. A valve assembly located in the passage operates to allow excessive gas pressure to escape from the tank chamber. The valve assembly has a first valve that closes, should the tank partially or totally overturn, to prevent liquid from flowing out of the tank and a second valve that is normally biased closed to prevent the escape of gases and vapor from the tank chamber to the atmosphere.

Abstract: A liquid fuel filler cap provided with a valve assembly in a channel extending through said cap said valve assembly comprising means defining at least part of a channel, a valve seat in said channel, a valve member adapted to co-operate with said valve seat to seal said channel, and means to bias said valve member into engagement with said seat, said biasing means comprising a pivoted member comprising a first portion which is adapted to move said valve member, and a second portion, and means for engaging with said second portion and for imparting a turning moment to said pivoted member which is greater than and in the opposite sense to the turning moment imparted to the pivoted member by said valve member alone when the valve member moves away from the valve seat, said first portion and said second portion being on opposite sides of the point of pivotal support of said pivoted member.

Abstract: A valve controlled disposable container, bracket mounted on the fire wall of an internal combustion vehicle for a selective feeding of a composition comprising a mixture of 90% hydrogen peroxide, 9% water, 0.5% nitro methane and 0.5% methanol to the intake manifold or carbureter of the engine.The present invention generally relates to internal combustion engine operation, and is more specifically concerned with a system for increasing the operational efficiency thereof through the utilization of apparatus which enables the selective feeding of an engine additive uniquely adapted to effect a substantial reduction in pollutant in conjunction with an appreciable reduction in gas consumption.One of the major problems facing the auto industry at the present time is the necessity of finding effective pollution reduction means. While many systems have been proposed, and in fact put into operation, the basic deficiency with such systems is the resulting substantial increase in gas consumption.