A multipurpose protective cap for a transmission prior to and during assembly with a drive shaft has a base portion having a cylindrical cross-section of a first inner diameter. The base portion comprises a side wall defining the cylindrical cross-section and having an outer edge and an inner edge, and a membrane spanning the cylindrical cross-section of the base portion at the outer edge of the side wall. An insertion portion extends from the base portion opposite the outer edge, the insertion portion having a cylindrical cross-section of a second inner diameter, the second inner diameter smaller than the first inner diameter. A contamination removal portion is formed in an interior surface of the insertion portion and configured to remove debris as the drive shaft passes through the insertion portion. A handle extends from the side wall of the base portion.

A multipurpose protective cap for a transmission prior to and during assembly with a drive shaft has a base portion having a cylindrical cross-section of a first inner diameter. The base portion comprises a side wall defining the cylindrical cross-section and having an outer edge and an inner edge, and a membrane spanning the cylindrical cross-section of the base portion at the outer edge of the side wall. An insertion portion extends from the base portion opposite the outer edge, the insertion portion having a cylindrical cross-section of a second inner diameter, the second inner diameter smaller than the first inner diameter. A contamination removal portion is formed in an interior surface of the insertion portion and configured to remove debris as the drive shaft passes through the insertion portion. A handle extends from the side wall of the base portion.

A mold that abuts an innerliner against a mold surface of a mouthpiece comprises two molds, an upper mold and a lower mold. The upper mold comprises a heating portion that heats an outer abutting surface that abuts the cylinder portion of the innerliner against the first annular surface of the mouthpiece and comprises an upper mold side positioning cylindrical surface; and the lower mold comprises an inner abutting surface that abuts a section of a dome portion near the cylinder portion against a second annular surface of the mouthpiece and comprises a lower mold side positioning cylindrical surface that is capable of engaging with the upper mold side positioning cylindrical surface. The section that comprises the lower mold side positioning cylindrical surface is formed of a material with a lower thermal conductivity than that of the upper mold.

A mold that abuts an innerliner against a mold surface of a mouthpiece comprises two molds, an upper mold and a lower mold. The upper mold comprises a heating portion that heats an outer abutting surface that abuts the cylinder portion of the innerliner against the first annular surface of the mouthpiece and comprises an upper mold side positioning cylindrical surface; and the lower mold comprises an inner abutting surface that abuts a section of a dome portion near the cylinder portion against a second annular surface of the mouthpiece and comprises a lower mold side positioning cylindrical surface that is capable of engaging with the upper mold side positioning cylindrical surface. The section that comprises the lower mold side positioning cylindrical surface is formed of a material with a lower thermal conductivity than that of the upper mold.

A drain petcock having a central channel for drainage, a side wall aperture for draining, and a closing plug that closes the central channel and overlies the side wall aperture. The partial removal of the closing plug enables a controlled flow for initial draining. A full removal of the closing plug enables a more controlled flow through the central channel for further draining.

An extraction cell cap assembly allows for toolless disassembly. The assembly includes a cap body having a threaded base releasably engaged with a cell vessel, a support member extending axially upward from the base, and a bore axially extending through the support member. The assembly also includes a locking cap having a plunger slidably received within the bore, a recess disposed within the plunger, and a locking portion that releasably engages the support member. Rotation of the locking cap in a first direction engages the locking portion with the support member, and rotation in an opposite direction disengages the locking portion. A filter is received in the recess and a seal member received in the bore, wherein the seal member forms a fluid-tight seal between the cell vessel and the assembly when the locking portion and the support member are engaged and the assembly is secured to the cell vessel.

Provided is an aircraft water tank with a lid joined to an opening portion via internal threads and external threads. An O-ring is compressed so that the opening portion is liquid-tightly sealed, which forms a sealed water storage space in a tank body. The portion of the lid that compresses the O-ring is a corner portion formed by an end surface of an annular plate portion and an outer peripheral surface of a tube portion. The portion of an inner liner that compresses the O-ring is a portion of the inner liner attached to an inclined surface. An end portion of the inner liner attached to the surface of a bulging portion is located outside the water storage space.

A pole cap is presented made of a plastic material for the pressure-tight closure of a pressure vessel. The pole cap comprises an inner side for the later closure of the pressure vessel, an outer side for the superwinding with a fiber composite material after closure of the pressure vessel and a neck-shaped open duct, which protrudes outwardly from the outer side and has an inner contour, each made of plastic material, and comprises a pressure port element connected to the duct for the closure of the duct, wherein the pressure port element comprises a seal cone made of metal with a first section protruding outwardly through the duct and a second section tapering at least in the area of the duct in a cone-shaped manner in the direction of the first section.

A pole cap is presented made of a plastic material for the pressure-tight closure of a pressure vessel. The pole cap comprises an inner side for the later closure of the pressure vessel, an outer side for the superwinding with a fiber composite material after closure of the pressure vessel and a neck-shaped open duct, which protrudes outwardly from the outer side and has an inner contour, each made of plastic material, and comprises a pressure port element connected to the duct for the closure of the duct, wherein the pressure port element comprises a seal cone made of metal with a first section protruding outwardly through the duct and a second section tapering at least in the area of the duct in a cone-shaped manner in the direction of the first section.

An aircraft water tank includes a conical surface of a skirt portion and a conical surface of an inner liner attached together using an adhesive, with an identical adhesive used in forming a fiber-reinforced resin layer on the inner liner via a filament winding method. When attaching with the adhesive, the adhesive is expelled at the outer circumferential edge of the skirt portion from between the conical surface of the skirt portion and the conical surface of the inner liner. Reinforcement fibers are applied on top of the protruding adhesive, and the adhesive impregnates into the reinforcement fibers. The protruding adhesive and the reinforcement fibers form a reinforcing member which connects a uniform stress surface of the skirt portion to a uniform stress surface of the inner liner located radially outward of the skirt portion.