Abstract: A radiator cover has an inner cover, a middle cover and an outer cover. The inner cover has a circular plate with a threaded post, a toothed disk with teeth on the top surface, two gaskets, a serpentine plug, a bolt and a circular washer. The middle cover has a bottom inward flange, two inserted holes on the top surface, a square post, a spring passed by the square post, and a toothed plate with a square hole inserted by the square post. The toothed plate has serrations at the bottom surface of the toothed plate, a cylinder on the top of the toothed plate, and a square hole at the center of the cylinder. The cylinder inserts in the spring. The serrations engage with the teeth. The outer cover has a circular wall and two pins extending downward from the top portion of the outer cover. The pins insert tightly into the corresponding inserted holes, respectively.

Abstract: A pressure cooking device includes a column securely disposed to a floor and a bowl is fixedly disposed to the column, an arm and a bar respectively disposed to the column, the arm having a cap disposed thereto and a threaded shaft threadedly engaged through the arm and engaged to the cap, the bowl having a pair of lugs, each lug extending diametrically opposite with each other and the arm further having a stirrup integrally formed thereto wherein a first tip, a second tip and an arcuate periphery extending therebetween to define a substantially arcuate recess, two extension portions extending separately from the first tip and the second tip such that the arm can be pivoted above the bowl and the cap is securely mounted to the bowl by rotating downward the threaded shaft, the bar having a lifting device disposed thereto so as to put a steamer or food into the bowl.

Abstract: A cooking utensil having three layer member includes a thermal retaining space between the intermediate member and the outer member, an air passage formed vertically in a part of the circumference between the side walls of the outer member and the intermediate member, and which is communicated with the heat retaining space, and a thermal retaining activator mounted on the exit of the air passage, and which selectively communicates the space with the atmosphere or not. Air in the heat retaining space is heated by heat transmitted from the outer member and the intermediate member made of material having high thermal conductively is indirectly heated by heat transmitted from the air in the space. Therefore heat energy of the intermediate member is uniformly spread out throughout the whole surface thereof so that heat is not focused at any part of the intermediate member and the food in the inner member which is closedly contacted with the intermediate member is not scorched or burned.

Abstract: A mating closure and finish system particularly adapted for use with containers, e.g. bottles containing carbonated beverages which generate gas in the bottle headspace and where the bottle finish incorporates at least two equally spaced helical cam tracks. The closure is comprised of plural sets of cam followers which fit into the cam tracks and where the cooperation between the cam tracks and cam followers produces an axial movement of the closure as it is rotated on the finish. For a two track system, which is the preferred embodiment, each track starts 180.degree. from each other and makes at least one full turn around the circumference of the finish. Also included are intervening stops and tapered speed bumps that contact and impede the cam follower(s) in the cam tracks during closure removal to effect a delay. Raised thread segments which define the cam tracks are intersected by a plurality of vertical venting slots or pathways along their helical length to vent headspace gas.

Abstract: A pressure cooker has a lid displaceable in the vertical direction with respect to the cooker to reduce the residual pressure in the cooker and to permit opening of the cooker without any rotary movement. Tongues projecting downwards between the dome edge and the cooker edge, in conjunction with guide slots provided in clips which hold together the cooker and the lid ensure radial opening and closing movements of the clips. A centering ring located in the dome and extending into the cooker facilitates the engagement of the lid on the cooker. The centering ring carries the sealing ring and the tongues and is based away from the dome by springs supported on the dome. The dome and the centering ring are guided on one another by interengaging elements and can be locked together in the open position.

Abstract: A can closure includes a plastic insert permanently installed in a hole in the can top, and a plug which seats in a pouring aperture extending through the insert. Locking dogs on both the insert and the plug provide a bayonet-type connection so that the container can be resealed after its contents have been partially used. Protrusions on the locking dogs prevent the plug from being fully removed until pressure within the container has been relieved.

Abstract: The cooking vessel comprises a container (1) and a lid consisting of an inner lid (3) and an outer lid (5). The container comprises a bent peripheral container rim (2) wherein twelve individual hook-like lock elements (21) are effective locking the cooking vessel. The lock elements (21) are arranged peripherically and swivellingly along the inner lid rim (4) so that through pressing the upper lid (5) against the lock elements (21) a swivel movement of said lock elements is obtained. The lock elements are C-shaped with a hook part (32), such that in the swivel position corresponding to the closed state, the ends of this hook part (32) grip under the outer container rim (2). In the swivel position corresponding to the opened state, the ends of said hook part (32) are in a distance from said container rim (2) allowing an unhindered lifting of the inner lid (3) from the container (1).

Abstract: A locking-unlocking device for a cooking vessel having a vertical center axis and composed of a container and a cover, for securing the cover to the container, the container having a side wall with an upper peripheral edge defining an open top, the device including a plurality of locking jaw assemblies mounted on the vessel at locations spaced apart about the center axis of the vessel, each locking jaw assembly including locking jaws which are movable into a locking position for securing the cover to the container; and an unlocking element linked to the locking jaws for moving the locking jaws to an unlocking position in which the cover is separable from the container.

Abstract: Device for controlling a flow limiting valve mounted in a cover of an appliance for cooking under pressure, the appliance further including a container to be closed by the cover, the cover having a central axis and the valve being movable between an open position for permitting flow of fluid out of the appliance and a closed position for blocking flow of fluid out of the appliance, the device comprising a cover handle and a bolt mounted in the cover handle for movement between first and second end positions along a line passing through the central axis, the bolt being operatively associated with the valve for permitting free displacement of the valve when the bolt is in the first end position and for preventing the valve from moving to the closed position when the bolt is in the second end position, and wherein: the bolt comprise biasing for elastically urging the bolt toward the first end position; and the device further comprises defining an automatic locking-unlocking system coupled with the bolt for contr

Abstract: A vertical rear door for a single-face station which has a pressurized volume and which station is used to produce corrugated cardboard. The door consists of a panel with an outer dimension slightly smaller than the inner dimensions of the door frame in which it is received. The whole periphery of the panel of the door is provided with peripheral seals resting on the inner periphery of the framework. An interlocking arrangement includes at least a hook mounted to extend in a vertical plane from the inner surface of the panel of the door and liftable so that it can move in a vertical plane by means of a lifting arrangement. The hook engages an interlocking axle which is mounted permanently on the door frame and the front part of the inner notch of the hook has a forward curvature to surround a substantial portion of the axle when the hook is engaged thereon.

Abstract: A sterility testing device includes a container made up of upper and lower plastic parts between which is welded a hydrophilic microporous membrane filter. The device also includes a removable plastic lid with vent holes. The lid is adapted to be secured to the container in two different positions such that, during in-situ incubation of a culture medium after the filtration of the sample and rinsing, the lid is deformed to allow a passageway for excess pressurized air to be removed from the interior of the container while at the same time preventing ambient air from entering the container. The device thus operates with a single membrane filter and is more economical to manufacture than prior art devices.

Abstract: The cover lock/safety device (1) of a pressure cooker (2) substantially comprises a cover handle (10) hinged onto the cover (3), which handle his formed by a first, hook-shaped element (16), and a second element (17) extending from the extension of said first, hook-shaped element. The first element (16) gets engaged in (12) to the side surface of the cooker body (4), tightly closing the said cover (2).When the cooker operates, the inner pressure inside the cooker (2) pushes outwards a pin element (11) which, in said extended position, engages the free end of said second element (17). Thus, the handle (10) results to be locked when the cooker is under pressure. The device is hence easy to use and, simultaneously, safe.

Abstract: A pressure cooker includes a container intended to hold cooking produce and which can be closed pressure tight with a cover that can be set on a rim of the container and locked thereto. The cover includes closing members movable between radially inward open positions, whereat the cover can be removed from the container, and radially outward locking positions, whereat the circumference of the cover is pressed against a region of the container rim with a circumferential sealing ring therebetween. The inside of the wall of the container in the region of the container rim includes a locking shoulder directed, for example, toward the container bottom, and a sealing shoulder directed, for example, toward the container opening. In the radially outward locking positions, the closing members are braced against the locking shoulder, thus pressing the sealing ring against the sealing shoulder.

Abstract: A cooling vessel has a container with an outwardly bent rim and a lid which can be set on the container, as well as a closure device with at least one closure element arranged on the lid, preferably in the region of a rim of the lid. The closure element can swivel about a swivelling axis approximately parallel to an outer edge or to tangent to the outer edge of a rim of the container from an open position which releases the lid from the container into a locking position in which the closure element grips under the container rim, thus forming a pressure-tight seal between the lid and the container. The closure element is designed as a hollow body with an essentially cylindrical or prismatic wall essentially parallel to the direction of the swivelling axis. The wall extends over only a part of the periphery of the hollow body and has a locking wall section which can be pivoted from an open position into a closing position. The closure element rests on a shaped body.

Abstract: A disassemblable container capable of sustaining pressure and disassemblable into a body and a lid and which is assembled with a leaktight seal includes a piece which is movable but integrally connected to the body and is pushed into a cavity of the lid under the effect of the internal pressure acting on a shutter and in opposition to an elastic return member. By pressing the movable piece, the shutter is brought into a pressure-release position. The shutter prevents the opening of the container when under an excessively high pressure and advantageously also serves as a safety shutter against overpressures.

Abstract: A pressure vessel arrangement including a lid with shiftable lock arms and a vent combination operating simultaneously. The lock arms passing through openings in the vessel housing sidewall when the lid is in the closed position. As the lock arms are shifted into a locked position a vent shaft into the vessel housing is sealed for pressurization of the vessel. Upon opening, the vent shaft is unsealed prior to disengagement of the lock arms to vent any residual pressure is the vessel safely.

Abstract: A pressure cooker includes a bayonet closure and two complementary handles, one of which is fitted to the body of the cooker, and the other is connected to the lid. The upper handle is provided with a lever for obtaining different degrees of pressure within the cooker. The lever has a groove in which a transversal shaft is received. A fork extending from the transversal shaft has a stepping at each end thereof. A control valve is assembled on the upper handle of the lid of the pressure cooker.

Abstract: A pressurizable container has a removable cover. The removable cover has locking elements to maintain the cover sealed to the container when the container is pressurized. The locking device is a piston received in a cylinder, and the cylinder communicates with the interior of the container. When the container is pressurized, the pressure fluid forces the piston and its associated locking bolt into a position such that the bolt passes through a wall of the container and a wall of the removable cover, locking the cover to the container. It is also possible to draw a vacuum on the container when the container is used as a sterilizing device.

Abstract: A pressure cooker with a humidity sensor or gas sensor, wherein a micro-computer reliably detects the point at which the internal pressure of a pressure cavity reaches a prescribed value by using this sensor by detecting the point at which a pressure control valve begins to operate and begins to discharge a large quantity of excess vapor or gas etc. from the pressure cavity to the outside, with a result which is equivalent to that of a direct measurement of the internal pressure with a pressure sensor, thereby attaining an accurate measurement without bringing the humidity or gas sensor into contact with the pressure cavity.

Abstract: A safety radiator cap for radiator providing a safety plate or wire made of shape memory alloy. The safety plate or wire bends downward under ambient temperature. High temperature water in the radiator causes the safety plate to extend out due to the memory characteristic of the alloy, and the safety plate thus presses against the neck of the filling hole.

Abstract: A safety seal for a pressurized system, such as a pressurized oil sprayer used in lubricating engines, or a pressurized paint sprayer, wherein the closure, for an inlet member, for addition of material such as oil or paint, is prevented from being removed, when the system is in the pressurized state. A resilient band, inaccessible from the exterior of the system, is tightly compressed by internal pressurization against an interface between the closure and inlet member thereby locking the closure into a non-removable position. Reduction of internal pressure permits the resilient band to contract away from the interface, thereby unlocking the closure from its non-removable position, with the closure being removable thereafter for addition of material into the inlet.

Abstract: A valve assembly includes a bonnet that is captivated in a valve body stem mount by means of a threaded bonnet nut. A pair of opposed pry holes are formed in the bonnet at a point above the top of the fully seated bonnet nut. Loosening of the bonnet nut enables a bonnet that is stuck in the body stem mount to be pried loose with a pry bar inserted in one or both of the pry holes and levered against the top of the bonnet nut. The bonnet holes also provide a visual indication of movement of the bonnet and whether there is pressure in the valve body.

Abstract: An autoclave useful for pressure digestion of samples for chemical analysis, consisting of a closeable vessel containing the sample, which during operation sustains elevated temperatures and pressures. The autoclave has a PTFE (Teflon) beaker and lid, in direct contact with each other thus forming a tight seal with an excess-pressure release mechanism. The assembled vessel is held in a device that presses the sealing surfaces of the beaker and lid together, through pressure on a metallic lid support disc. The sealing surfaces of the beaker and lid are free-standing, which permits a direct release of excess-pressure and necessitates an extended clamping device for the lid support disc, which is fixed at a single point.

Abstract: A simple to operate locking mechanism for a pressure cooker, the locking mechanism having a locking arm rotatable from a fully open to a fully locked position, the locking arm being operatively connected to a cam shaft assembly which is rotatable with the locking arm, the cam shaft assembly being slidably axially in a cam shaft sleeve rotatably mounted in a displacement member which causes the cam shaft assembly to be axially displaced as it is rotated by the locking arm, the cam shaft assembly being moveable from a retracted to an extended position as the locking arm moves from a fully open to an intermediate position. A safety mechanism is provided to prevent rotation of the locking arm from the intermediate to the fully locked position in the event the cam shaft assembly is not fully extended. A pressure responsive safety mechanism is also provided to prevent opening movement of the locking mechanism in the event the cooker is under pressure.

Abstract: The mechanism (10) for controlling the tail piece (13) is arranged within the surface area bounded by a clamping collar 9 equipped with the tail piece (13) so that the control of the tail piece (13) is performed by a pivoting motion of the lever (11) controlling the tail piece above the surface of the lid (2).

Abstract: A high preload quick operating closure for a pressure vessel (17) comprises a vessel opening or nozzle (19) having a port flange (20) with an upper surface (23), which has a wall (26) affixed thereto, the wall (26) having one or more circumferentially spaced holes (32), the combination of the wall (26) and port flange (20) forming a well (29), and a vessel head (27) forming a closure for the port flange. A plurality of wedge assemblies (30) secured to the wall (26) at holes (32), comprising hydraulically operated cylinders (39) operably connected to wedges (33) which slidably engage a tapered surface (40) of the vessel head (27) creating a larger sealing force between the head (27) and the flange (20) to seal the pressure vessel (17) with an enormous preload. The closure incorporates a control system (50) with two independent safety features to prevent the closure device from opening when the pressure vessel ( 17) is pressurized.

Abstract: A cooking apparatus including a cooking vat and a hinged lid responsive to a control mechanism and provided with devices for vacuumizing and pressurizing the vat, respectively. The hinged lid includes a single opening lined with a tubular sleeve communicating at its lower end with the vat and, at its upper end, with a device for selectively communicating the vacuumizing or pressurizing device with the vat. The vacuumizing and pressurizing devices include a fixed member secured to the top surface of the lid which cooperates with a movable member for selectively connecting the vat to the vacuumizing device or the pressurizing device, as a function of cooking requirements. The pressurizing device is further provided with a safety valve.

Abstract: A tank having a top surface with a top opening bounded by an upwardly extending tubular neck and a lid. A seal member on the lid is in sealing engagement with the neck inner surface so that the lid can move up and down without losing the seal. A lid retaining member is mounted on the top surface of the tank so as to retain the lid in a position in which the sealing engagement is maintained when the interior of said tank is pressurized so as to urge the lid upwardly and structure is provided for insuring against inadvertent removal of the retaining member.

Abstract: A tubular body provided with a first end wall is filled through the open end thereof and sealed by a second end wall. One of these walls has a hole therethrough closed by a closing means, this wall being initially of generally concave configuration with the closing means disposed entirely inwardly of a plane passing through the rim of the wall. The concave wall is subsequently changed to a generally convex configuration with the closing means disposed at least partially outwardly of the plane.

Abstract: A safety latch mechanism for use in connection with a pressure vessel of the type having a shell, a closure for removably closing an access opening defined by the shell and a locking ring rotatably supported by the shell adjacent the access opening for releasably locking the closure in access opening closed position. The mechanism features a first latch member mounted by the shell for releaseably preventing unlocking rotation of the locking ring relative to the shell and a second latch member mounted by the locking ring and responsive to movement of the first member for releasably preventing relative rotational movements of the locking ring and closure. The first member is operatively associated with a vessel exhaust valve, which tends to constrain unlatching movements of the first and second latch members, when the pressure within the vessel exceeds a safe level at which the closure may be operated without the possibility of injury to person or property.

Abstract: A latching mechanism and pressure-operated safety lock for a pressure vessel such as a pressure frier, the invention comprises an interlock system which includes a safety lock and cooperating latching mechanism which prevents opening of the pressure vessel while potentially hazardous pressure levels exist within the vessel. The latching mechanism of the interlock system includes structure which facilitates the tightening of a lid of the pressure frier both before introduction of pressure into the vessel and during the existence of pressure conditions within the vessel. The lid is tightened over the pressure frier by means of a slotted sleeve disposed on the latching mechanism which cooperates with a pin of the safety lock to allow rotation of the latching mechanism to tighten the lid while maintaining positive engagement of the safety lock to prevent opening of the pressure vessel.

Abstract: A safety lock in a steam pressure coffee maker is disclosed. The safety lock comprises a piston fitted in an orifice of the coffee maker body. When the pressure in the coffee maker chamber is sufficiently high, the piston is moved causing the piston rod to enter recesses provided along the periphery of a threaded plug which closes the main aperture. With the piston rod in this position, the threaded plug cannot be turned, thereby ensuring that the main aperture remains closed until the high pressure conditions no longer prevail.

Abstract: A cover is secured in closed position on a pan by means of a closure. A seal element is mounted between seats formed by part of the cover and part of the pan. A pin to which connects a knob is movably mounted in an upper handle mounted on the cover and may presh away said seal element from its seats. The cover is provided with a steam-discharge opening which lies on the outer side of said seats while the upper handle is provided with a channel which connects to said opening and opens above the cover with an end directed towards the cover center. Part of the steam can also escape downwards between the upper handle and a lower handle mounted on the pan.

Abstract: A steam-pressure cooking utensil has a utensil and a lid which are both connected with one another by a bayonetlike or similar lock. A cooking and safety valve is arranged in the lid, and includes a valve member which is connected to the lid and a valve which is held pressed against a valve seat by means of a spring. Furthermore, the steam-pressure cooking utensil has a locking mechanism which permits relative rotation of the lid and utensil and thus an opening thereof only after the pressure in the utensil has been removed.

Abstract: Microwave digestion vessel of Teflon PFA material including a Teflon PFA vessel with a threaded top and a Teflon PFA cap with internal threads for engaging the vessel threads. A valve assembly extends upwardly from a center portion of the cap and includes a valve seat, a valve ball internal thereto, a Teflon spring uniquely configured and a valve cap holding the spring and ball into the ball seat of the valve seat. An exhaust hole is provided out one side of the valve cap. The vessel includes a flange for encompassing a lower portion of the cap for pressure expansion protection. A ring with an adjoining flange is also provided for the cap to provide for pressure expansion protection. An alternative embodiment is illustrated with a side venting orifice with filtering, a dialed in spring pressure, and a spring cavity with an integral valving surface.

Abstract: The invention concerns a steam pressure cooking pot consisting of a container accommodating the product to be cooked, a cover with safety valve capable of being placed thereupon, a locking means clamping container and cover to one another in the closed condition, and a seal disposed between cover and container securing the inside space of the pot against a drop in pressure in the closed condition, with a sealing lip of the seal pointing radially inwardly lying against the cover or the container which, upon pressing down on the cover in the direction toward the container, lifts off from the sealing emplacement on the cover or on the container, and with the cover or container, upon subsequent movement of the cover into the opening condition, executing a relative movement toward the sealing lip. Disposed radially outside the edge of the sealing lip, between the sealing lip and the cover or the container, is a slide element that acts as a levered support for the lifting movement of the sealing lip.

Abstract: A pressure interlock means to prevent release and opening of the cover under a potentially dangerous condition. The cooking apparatus is formed including a suitable open-top pot having a top cover unit secured to open and close the pot. Cooking oil is contained within the pot to a suitable depth or level spaced from the pressure cover unit. A pressurized deep oil cooker has a cover unit and includes a clamp bar pivotally connected to one side of a cooking pot. A mechanical hook unit couples a hook member on the free end of the bar to a pin. A plate cover has a D-shaped seal in a dovetail groove and abutts the upper edge of the pot. The cover is secured to the cam by a slotted connection permitting limited movement of the cover relative to the bar. A cam unit is coupled to the bar and has a rotating cam having a release position in which limited movement of the cover is permitted and a locking position which spreads the clamp bar relative to said cover to seal the cover and set the latch.

Abstract: A safety locking mechanism for a pressure cooker includes a member slideable within a handle of the lid of the cooker between a first position in which the handle of the lid and a handle of the cooker body are locked against movement relative to each other, and a second position in which a seal of the cooker is released and a valve of the cooker is moved to an open position to release pressure from within the cooker.

Abstract: A pressure cooker which uses an elastic C-connector to fix a cover to a cooker body in airtight manner. Loosening and tightening of the C-connector are controlled by an operating handle. The operating handle has a relief valve at one end. The relief valve has a valve body and an adjustable valve rod so that when the C-connector is in tightening condition, the valve body is located on a valve seat on the cover. Pressure can be relieved through the relief valve or edge of the C-connector after it reaches a certain level. Pressure in the cooker will raise two safety pins to restrict movement of a rod so that removal of the valve body from the valve seat is impossible and thus removal of the cover is prevented for safe operation.

Abstract: A pressure locking cap for a pressurized vessel is screw threaded on its periphery for being screwed into a filling opening in the vessel. The top of the cap includes a socket for receiving a wrench for unscrewing the cap. A first piston in the cap communicates into the pressure of the vessel and the piston includes a piston rod which is moved into the socket to prevent insertion of the socket removal tool upon elevated pressure developing in the vessel. In an alternate embodiment, a second piston is placed inside the first piston and also communicates with the pressure of the vessel. A locking element, such as a ball, moves with the first piston through the cap body until the locking element moves even with a recess in the cap body.

Abstract: A pressure cooker in which a pressure vessel (1) and a lid (2) are associated with each other by means of a bayonet-type closure system (4, 5) is provided with a sealing gasket (3) fitted between the pressure vessel and the lid and with a controlled leakage device having a push-rod (8) mounted on the lid (2). The sealing gasket (3) has at least one groove (11) parallel to one edge of the gasket in a lateral face which is directed towards the pressure vessel (1) externally of this latter. When the sealing gasket (3) is displaced by the push-rod (8), the groove (11) establishes a calibrated leakage flow between the interior and the exterior of the pressure vessel.

Abstract: A gate valve bonnet closure which can be quickly and safely serviced with common tools. The valve bonnet fits within the valve body. Lock elements in contact with the bonnet fit into an annular groove in the body. The lock elements are of a size and configuration so as to allow location within the groove for substantially the full extent of the annular groove or, spaces between adjacent lock elements can be filled by retaining plates preferably bolted to the bonnet to prevent movement of the lock elements. Pressure sensing vents or bolts are preferably used to prevent opening of the valve when there is pressure in the valve body. The pressure sensing bolts holding retaining plates in place include a hollow bore which is sealed when the bolt is fully seated but is exposed when the bolt is rotated a small number of times to indicate and bleed off pressure within the valve.

Abstract: The safety device is for a pressure-cooking appliance comprising a pressure vessel (1) on which is mounted a lid (2) provided with an opening (8) which communicates with the interior of the vessel (1) and in which are mounted a valve and valve stem (9) for closing the opening when the pressure within the vessel attains a predetermined value. The lid handle (5) and the vessel handle (6) comprise a thumb-actuated locking device (11, 15, 16, 18, 20) which cooperates with the valve stem (9) of the lid for preventing closure of the valve as long as the two handles (5, 6) are not in the closed position and for preventing opening of the lid (2) when the two handles are in the locked position as long as the valve is in the closed position.

Abstract: Microwave digestion vessel of Teflon PFA material including a Teflon PFA vessel with a threaded top and a Teflon PFA cap with internal threads for engaging the vessel threads. A valve assembly extends upwardly from a center portion of the cap and includes a valve seat, a valve ball internal thereto, a Teflon spring uniquely configured and a valve cap holding the spring and ball into the ball seat of the valve seat. An exhaust hole is provided out one side of the valve cap. The vessel includes a flange for encompassing a lower portion of the cap for pressure expansion protection. A ring with an adjoining flange is also provided for the cap to provide for pressure expansion protection.

Abstract: A safety interlock device is provided for preventing the opening of a vessel containing a pressurized fluid. In a typical application, the interlock device may be used in industrial applications to prevent the inadvertent unscrewing of a cap from the end of a large pressure vessel containing a hazardous gas. A pressure port end of the interlock body is adapted for threaded engagement with the vessel and is open to vessel pressure. A pressure-responsive locking piston movable within the body prohibits removal of a stem when vessel pressure exceeds a selected minimum pressure. A chain may be secured at each end to the stem and vessel cap, so that the cap cannot be unscrewed to open the container unless the stem is first removed. In one embodiment, the locking piston is prevented from manual override by the position of a second piston and a plurality of ball members locked in a groove.

Abstract: A guide mechanism for use with apparatus for opening and closing a door of a chamber includes a way system for aligning the door with the chamber while the door is being opened and closed and a carriage member operatively linked to the way system for linking the door to the way system when the door is open. The carriage member includes a plurality of pins adapted to receive a portion of the apparatus when the apparatus moves the door into an open position to engage the door to the carriage member. Means are provided to coordinate the operation of the pins and the apparatus.

Abstract: The invention comprises a core barrel plug capable of being remotely installed in a port of a core barrel of a pressurized water nuclear reactor for converting the reactor from a by-pass downflow configuration to a by-pass upflow configuration. The plug comprises a body having an expandable cylindrical portion with a movable mandrel disposed in the body. Remote fluid pressurization causes the mandrel to be advanced thus expanding the body into contact with the port. The plug also comprises a locking mechanism to prevent inadvertent release of the plug and a venting mechanism to prevent inadvertent overpressurization of the plug.

Abstract: A gas pressure actuated latch for a fuel tank cap or other container tank cap is disclosed. The cap body has formed therein a cylinder in communication with an air inlet passageway connected to an external air hose fitting for movement of a latch piston contained within the cylinder in response to the application of pressurized air. The piston is provided with a plurality of opening cam fingers which are urged against a corresponding number of slide latches to move such latches horizontally inward to open the latch when air is applied to the cylinder. This causes such latch members to slide inwardly away from beneath the lip of the fuel tank filler opening into an unlocked position in response to vertical movement of the piston.

Abstract: A pressure vessel for storing and delivering liquid under pressure which includes a housing, a removable cover on the housing, and a seal between the housing and the cover providing a liquid-tight and air-tight seal. Locking elements cooperate between the cover and the housing to provide a bayonet type lock therebetween. The vessel is provided with a manually unlockable excess pressure valve in the cover, the valve having a seating face arranged to be seated against a valve seat and the cover and a spring which urges the valve seating face into such seated relation. The structure is also provided for locking the valve seating face in unseated relation against the action of the spring means.

Abstract: A steam peeling or boiling apparatus for crops, such as potatoes, carrots, celery, apples and the like, or for meat, comprising a substantially cylindrical peeling vessel arranged for rotation around horizontal stub shafts, having a supply and discharge opening disposed eccentrically or non-eccentrically in one of the end faces. The opening is closable by an inwardly movable cover operated by a lever rotatably connected thereto, the other end of which is rotatably connected to the exterior of the vessel. The cover is provided with a second operating lever by means of which the cover can be displaced along the inner wall of the vessel in entirely "controlled" fashion. The second operating lever is rotatably connected to the exterior of the vessel at a location situated in the perpendicular median plane between the initial and final positions of the cover pivot of the second operating lever.