Abstract: A bottom wall portion of a valve member has an annular convex portion projecting from a bottom surface toward a valve seat. A rubber seal member has a flat plate portion in contact with the bottom wall portion, and an annular lip portion formed to project toward the valve seat at a position corresponding to the convex portion in the flat plate portion so as to abut on the valve seat at the time of valve closing. A projecting tip of the lip portion forms an arc-shaped part in the axial cross section of the valve member. A projecting tip of the convex portion forms an arc-shaped part having a curvature radius larger than a curvature radius of the arc-shaped part of the lip portion in the axial cross section of the valve member.

Abstract: A sealing system for an outlet of a plastic-lined cylinder has a plastic liner outlet extending into a bore of a boss. An insert is engageable with the bore, forming a primary seal between the insert and portion of the liner outlet. Further, a tapered compression surface of the insert engages a tapered bore portion of the liner outlet adjacent the primary seal for compressing the liner outlet and closing any annular assembly clearance at the primary seal for obviating opportunity for seal extrusion under pressure. An axial position in the boss, and dimensional integrity, of the liner outlet is maintained by engaging an annular distal end of the liner outlet in the bore by a stop. The stop can be integral with the boss. Reverse extrusion of the primary seal due to trapped gas and rapid decompression of the cylinder can be defeated by providing a leak path.

Abstract: A fuel cap includes a filler-neck closure including a pressure-relief valve and a vacuum-relief valve and a handle arranged to overlie the filler-neck closure. The fuel cap also includes a torque-transmission ring arranged to lie between the handle and the filler-neck closure.

Abstract: A portable fuel dispensing system comprises a fuel pump assembly, a conduit, and a fuel tank cap assembly. The pump assembly comprises a handle assembly, a cylinder assembly, and pump body assembly, and the conduit is a flexible hose or tube capable of channeling fuel from the pump assembly to the external fuel tank. The conduit and the fuel tank cap assembly comprises mating couplers having valves biased closed when disconnected from the mating coupler. In use, the fuel tank cap assembly is threaded to the external fuel tank, and the conduit coupler is connected to the cap coupler, thus forming a fluid-tight connection between the conduit and the fuel tank cap assembly. Thereafter, the external fuel tank may be replenished by manipulating the pump assembly. In other embodiments, the portable fuel dispensing system has a dual line conduit permitting vapor in the external fuel tank to be evacuated via a vapor line in the conduit and collected in the reservoir of the portable fuel container.

Abstract: A vented non-spill fuel cap assembly includes a self-sealing, releasable fluid coupling and a visible fill indicator. The fuel cap assembly permits transfer of fuel from a storage vessel such as a gas canister to a fuel tank equipped with the cap assembly in a manner which prevents escape and spillage of liquid fuel and vapors. Fuel is introduced from a supply canister or other source via a hose and coupling releasably matable with the self-sealing coupling on the cap assembly, without removal of the cap assembly. The indicator visibly indicates when the tank is full.

Abstract: The invention relates to a sealing cap (11), for openings and containers. The valve arrangement (15) comprises an axiallly displaceable valve body (17), which is held in the direction of the container interior by means of a spring (22) against a first sealing seat (34), on the cap interior. The valve arrangement (15) comprises one single valve body (17), provided with a first axially effective sealing surface arrangement (20) and a second radially effective sealing surface arrangement (21). The axially effective sealing surface arrangement (20) co-ordinates with an axial seal seat (34), surrounding a defined opening (32), connecting to the container interior on the cap inner part (14). The radially effective sealing surface arrangement (21) co-ordinates with a first radial counter sealing surface (61, 62), comprising a bypass (39), for the first flow connection and a second radial counter sealing surface (61), comprising a safety relief opening (69), for the second flow connection.