Abstract: A tank closure assembly adapted to releasably couple tank sections formed by transversely splitting an integral bag-molded fiber-reinforced tank. The assembly includes external circumferential flanges secured to the tank sections adjacent their severed faces and in opposed relation to each other. An O-ring seal, disposed externally of the tank sections and between the flanges, is compressed into sealing engagement with surrounding surfaces, by tightening of a circumferential band encircling the flanges, to seal the tank sections at their plane of separation. A method of machining a tank to simultaneously form the split sections and suitable flange receiving grooves thereon is disclosed, as well as a method of pressure-testing the machined tank sections prior to assembly of the flanges and O-ring seal.

Abstract: A new and improved device and method for hermetically sealing a lens window to a camera housing, which permits removal of the window from a pressurized housing without danger to the technician due to rapid or explosive decompression. The device comprises a unique combination of an O-ring seal and a square or rectangular cross-section face seal ring with two snap-rings in such a manner that removal of the first snap-ring causes controlled decompression of the housing, while the lens window is retained by the second snap-ring.

Abstract: A tamper-proof container closure device having a closed cap member and a crimping ring. The closed cap member is internally threaded and has a flared annular skirt extending around its base. The crimping ring is snapped into a retained position on the flared annular skirt before the cap is screwed onto a container. After the cap is screwed onto a container, the crimping ring is deformable radially inward around a suitable boss at the container opening onto which the container closure device is installed, thereby drawing the flared annular skirt into sealing engagement with the periphery of the boss and preventing removal of the cap without first visibly tearing off the ring.

Abstract: A container which may be formed of sheet material in a conventional manner of forming cans and the like and wherein the container is suitable for sealing under a vacuum and is readily openable and reclosable in the manner of a Mason jar. The container includes a body defining a peripheral sealing cavity in which a formed in situ gasket is permanently retained.

Abstract: An aircraft fuel tank construction for the type of fuel tank which is fabricated by joining a split cylindrical center section with two conical end sections and which is disassembled during shipment and storage. The center section is joined together by a connecting plate which maintains a gap between the joined ends at a fixed, predetermined width for optimum sealing effectiveness of an interposed elastomeric seal. Owing to the manner of construction, the seal may be seated and then visually inspected for potential leakage before the center section is joined. Leakage at the interface of each end section seal with the center section seal is avoided during expansion or contraction of the center section seal by the center seal being suitably positioned to slide over the end seal during such movement. The tank is free from drag-producing obstructions as all joints are flush with the surface of the tank.

Abstract: A pressure vessel having a band compressed onto a lockseam to angle the latter under an end plate for increased seam strength.

Abstract: An improved interlocking assembly for an air filter, air lubricator, filter-regulator piggyback or the like which includes a pressure vessel normally retained by a head member and an interlocking collar. The pressure vessel nests in the collar to prevent accidental separation of the head member and pressure vessel. Locking tabs on the collar from being removed unless it is sequentially raised, rotated and lowered.

Abstract: A horizontal-type tank for therein operating heated pitch impregnation of carbon electrode blanks, comprising a cylindrical body having an annular weir member disposed near its open end portion for preventing flowing out of an unused pitch portion, and a lid member releasably closing the opening of the body, which has a double wall structure providing between the outer and the inner walls a heated pitch jacket in liquid communication with the body, said inner wall having an outer edge portion protruding into the body beyond the location of the weir member. The body also has an annular coolant jacket disposed close to its flange surface portion against which an annular seal member provided to a flange portion of the lid abuts.

Abstract: A protective gasket for the chime of a container. The gasket includes an annular flexible strip adapted to conform to surfaces of the chime. Surfaces on the strip cooperate with the container surfaces to hold the strip in position on the chime. Projecting ribs on the strip are located to engage with a cover applied to the container to provide a seal between the container and the lid.

Abstract: A molded plastic fuel tank filler neck cap includes a closure portion having an axially inner end for engaging and closing the filler neck, and an axially outer end. The cap further includes a shell providing a hand-grip cover, the shell and the closure axially outer end being rotatably fastened together by a retainer ring. The shell includes a depending radially outer annular skirt having a radially extending flange adjacent its axially inner edge. The flange provides a peripheral, axially outwardly facing surface. The ring includes a radially outer, axially extending portion which provides an axially inwardly facing surface for engaging the axially outwardly facing surface of the flange. The axially inwardly facing surface extends interruptedly peripherally about the ring to provide engaging segments and clearance segments. The ring includes a plurality of radially and peripherally extending slots which are axially spaced from the interrupted axially inwardly facing surface.

Abstract: The invention pertains to a tamper-proof device for containers made of plastic materials provided with a threaded collar intended for fitting a screw cap, characterized by the fact that it comprises a rupturable platelet intended to be fitted between the container and the cap, around the collar, said platelet comprising at least one locking tooth for the purpose of being engaged by at least one tooth borne for this purpose by aforesaid cap.

Abstract: An expandable, externally-threaded collar member which is adapted to cooperate with an internally-threaded cap member to form a closure for a container. Advantageously, the expandable, externally-threaded collar member can be applied to the top, neck portion of the container by merely sliding said collar member over the rim of the container. Once in place, the container can then be sealed by applying the internally-threaded cap member to the externally-threaded collar member.

Abstract: A submerged repeater or equalizer housing having a clamping ring therein which dishes and resiliently presses a bulkhead toward an annular seat to compress a seal therebetween. A modified cable outer conductor connection to the bulkhead improves high frequency return loss.

Abstract: A pressure cooker has a pan with a circumferential rim and a lid with a closure part rotatable concentrically thereto for locking the lid on the pan part in a pressure tight manner. The lid and closure part have peripheral flanges each engaging under the edge of the pan part over a maximum of half the length thereof. The flanges are movable into one another and are arranged so that the pan rim can be released from the flanges at least over half its circumference.

Abstract: Disclosed herein is a "drumhead" swimming pool cover assembly for a pool of predetermined size and shape having a circumscribing coping including a special male locking lip. The cover assembly includes a sheet of flat, flexible material having dimensions sufficient to allow the cover to drape the edges of the swimming pool coping, and a plurality of extruded plastic locking channels adapted to snap-on and lock to said locking lip along most of the pool periphery and to clamp said cover to said coping in a manner whereby the subsequent top loading of the cover increases the clamping or binding action of the channel and the lip with respect to the interposed cover portions. Advantageously, the coping to which the new drumhead cover is attached is of extruded aluminum construction, while the locking channels themselves are of extruded thermoplastic construction.

Abstract: A deep drawn cap for protecting the fuze in a projectile which fits over fuze and is retained in place by an E clip. An O ring provides a weather tight seal between the cap and the projectile.

Abstract: A closure for a large diameter circular opening such as the end of a tubular conduit subjected to internal positive pressure comprises a coaxial cover lid that may be opened only when a pressure relieving venting valve is opened, the cover lid being connected over the opening by screw threaded means of larger diameter than the inside diameter of the opening, and the venting valve having a removable closure cap which impedes removal of the lid until the internal pressure is vented.

Abstract: A closure locking and orienting device for securing the closure to a housing at an opening therein having a semi-circular groove on the periphery of the closure and a similar groove at the opening of the housing, the grooves being in opposing relation to form a circular groove about the closure. A bore extends radially through the housing and the closure, a further bore extending through the housing communicating with the circular groove and an elongated and substantially pliable member threaded through the further bore, received by the circular groove and extending about the closure to span the juncture between the closure and the housing with the other end of the pliable member extending through the radially disposed bore to lock the closure to the housing while orienting the closure with relation to the housing.

Abstract: A child-proof aerosol package in which the safety cap is permanently fastened to the aerosol container by means of a grooved ring that is attached to the container.

Abstract: A conventional, relatively soft plastic bottle having a generally cylindrical threaded container neck such as a common polyethylene bottle may be used with a specially formed closure and a fitment as a child resistant container. The closure includes internal ratchets adjacent to the bottom of the skirt which are adapted to coact with corresponding ratchets on the fitment so as to prevent the closure from being unthreaded from the container neck. The fitment engages the container and/or the container neck in such a manner as to lock the fitment against rotation. Preferably the fitment is formed so that it can be moved along the container neck to an operative position in which there is such engagement with the container and/or container neck as the closure is threaded on the container neck.

Abstract: A tamperproof screw cap for a container which may be locked in place on the container spout, including a lock-band surrounding the cap and having one-way teeth thereon engageable with one-way teeth surrounding the spout which permits the cap to be screwed into place but prevents the cap from being unscrewed until said lock-band is removed.

Abstract: A rotatable annular collar adapted for use with a conventional overcap of the snap-fit type and a container having a cylindrical mouth, an inwardly directed annular groove extending completely around the wall of the container and an outwardly projecting annular bead positioned at or between the mouth of the container and the annular groove formed for releasable holding engagement with the snap-fit cap is provided. The snap-fit cap has a top panel, an annular skirt depending therefrom and a lift tab extending outwardly from the lower margin of the depending skirt which also has an inwardly projecting annular bead adapted to snap over the outwardly projecting annular bead of the container. The rotatable annular collar has an upstanding exterior wall member with an access gate therein, an inwardly extending flange connecting the exterior wall member and an interior annular rib member frictionally fitted to the annular groove of the container.

Abstract: A cover for nursery and flower pots is constructed from a thin flexible plastic material having a plurality of holes therein through which water and nutrients may be supplied to the stock. A circumferential lip about the outside perimeter of the cover is adapted to fit over the top of a pot and secure the cover thereto. The cover is formed with a plurality of annular steps which are graduated in depth toward the open center. The cover is in one piece with a single radially extending slit or separation to permit the cover to be opened for placement on a pot containing growing stock. A flexible tab which secures to a knob on the outside circumference of the cover serves to lock the cover in place.

Abstract: A vessel is formed with a peripheral flange upon which a lid is positionable to form a chamber within the vessel. The lid and flange are provided with juxtaposed grooves carrying a sealing member therebetween and a locking strip around the periphery of the pressure vessel for engagement with bolts secured to the lid.

Abstract: A metal reusable barrel for storing and shipping fluids. The barrel is capable of being disassembled after initial use to minimize the space required for transporting the barrel back to the original shipper and also minimize the expense of reconditioning the barrel for reuse. The barrel comprises two barrel halves, each in the shape of a frustum with the larger end open and the smaller end sealingly closed by a circular plate. The open ends of the two barrel halves are sealingly clamped together to form a fully assembled, leak-proof barrel. When the barrel is empty it may be disassembled by detaching the two barrel halves from one another and nesting one inside the other for shipment back to the producer. In their disassembled condition the barrel halves can be easily cleaned and reconditioned because of the accessibility of their interior surfaces, after which they may be reassembled and reused.

Abstract: Two symmetrical, axially separable barrel halves of plastic material are provided at their confronting end faces with peripheral edge beads each forming a set of axially projecting teeth alternating with gaps of like width, the teeth of each half fitting into the gaps of the other. The free ends of the teeth are provided with radially extending bosses forming two annular crenelations separated by a substantially flat ring zone upon the interfitting of the teeth, this zone receiving a broad strap inserted between the two crenelations to hold the barrel halves together. The peripheral edge beads are further provided, radially inwardly of the teeth and gaps, with axially extending tenons and mortises or equivalent tongue-and-groove formations to provide a supplemental bracing effect. The inner strap surface may be correspondingly beveled to exert upon the free tooth ends an elastic biasing force urging the two barrel halves toward each other in the axial direction.