Abstract: This relates to an air freshener which is intended to be mounted on a swinging member, such as a door. The air freshener includes an upper reservoir and a lower liquid perfume distributor or generator pad. The reservoir will carry a dispensing valve, preferably in the bottom wall thereof. The dispensing valve includes an over center valve member which will tilt from one position to another when the air freshener is moved. When actuated, the valve member will swing from one tilted orifice closing position to a momentary on center dispensing position and then to its other off-center tilted position closing the valve orifice.

Abstract: This relates to the provision of latch mechanisms for a dispensing closure of the type having a well formed in the top wall thereof with the well being of a stepped bottom construction and there being a closure member which includes a hinge strap and a cover panel with the cover panel having an outline generally corresponding to that of the well and being divided by a transverse hinge line into a cover element and an opener. when the opener is depressed, the cover element automatically swings to an upstanding position uncovering a dispensing opening or openings. Latch mechanisms are provided to retain the opener within the well and to retain the cover element in an upstanding out-of-the-way dispensing position. This abstract is not to be construed as limiting the claims of the application.

Abstract: A dispenser container and container cap combination with the container formed of a molded plastics body having an integral section forming a tube extending from the fluid bottom area of the container to the container neck opening. The cap having a stopper portion closing a filling part of the container neck opening and having a dispensing orifice in communication with the tube portion of the container.

Abstract: A tamper indicating closure cap of the type having a pivotable stopper closing a cap top orifice. The stopper has an integral flange overlying portions of the top and extending behind the pivotable member to preclude pivoting of the pivotable member. The flange is removable from the pivotable member and indicia formed in the container top underlying the flange is made visible by removal of the flange.

Abstract: A folding, wrist braced slingshot having a yolk, a hand grip that stores and dispenses ammunition for use and elastic members connected to said yolk. A wrist brace is frictionally, detachably and pivotably mounted to the hand grip near the base thereof. A pivotable closure means is provided the bottom of the hand grip. The closure swivels to dispense ammunition stored within the hand grip. The yolk comprises a forked portion and a doubled over stem portion wherein the inside base of the stem portion contains a slot and the hand grip contains an inwardly projecting member positioned within said stem portion so that the end thereof fits in said slot.

Abstract: A plastic dispenser cap has a closure, integrally attached thereto by a continuous hinge, for blocking holes formed in the cap. When shut, the lower surface of the closure is flush with the upper surface of the cap, resulting in an article of minimal height. When assembled to standard bottles, a stackable assembly results.

Abstract: In a hopper or the like wherein the flow of particulate material is controlled by a gate the improvement wherein the gate is mounted to be swingable towards an open position within the hopper so as to break arches and rat holes which form in the material above the gate or a gate adjacent thereto.

Abstract: Plastic dispensing closures adapted for use on bottles containing products such as syrup and the like and which have an integral handle include a snap-on base adapted to be securely attached to the neck of the bottle and shaped to form a pouring spout, and a pivotal lidi based into engagement with the base, the lid having a thumb-engagable extension positioned adjacent to the handle to facilitate opening and closing of the lid. The closures include a non-releasable tear-away inner seal connected to a pull ring, and are attached to the bottle such that they cannot be removed without being permanently deformed, thereby affording a tamper-evident closure. The closures are capable of accommodating a rather large dimensional bottle tolerance, thereby enabling them to be employed on plastic as well as glass bottles. The closures may be formed as either one-piece or two-piece structures.

Abstract: A closure cap for a container of granular solid contents. The cap has a body and a coverflap. The body has pouring apertures, hinge post receivers and a relief. The coverflap has hinge posts that fit into the hinge post receivers, sealing protrusions that can seal the pouring apertures and a depressable end. The depressable end can be depressed into the relief on the body, allowing lever action. The sealing protrusions and the pouring apertures can be disengaged by application of pressure to the depressable end, and the contents can then be removed from the container.

Abstract: A sealing cap is provided for use in conjunction with safety storage containers and the like, which provides automatic venting and relief of interior vacuum, including low interior pressure resulting from contraction of the contents of the storage container, and from removal of liquid contents from the container. The cap provides a secure closure for a first opening in the container through which contents may be added or removed, while simultaneously providing the aforedescribed venting function. Incorporation of the present invention with a storage container having a second fluid dispensing opening avoids the necessity of providing an alternate or specialized air vent to admit air and prevent a vacuum build-up during dispensing of the contents. In one embodiment, the device is particularly immune to the effect of corrosive fluids stored within the container.

Abstract: A container lid such as a lid for a parmesan cheese container or the like, having a plurality of independently operative openings which is formed of a one piece two layer central bulk access and peripheral crescent-shaped broadcast construction, and which provides a substantially airtight seal for the container, which permits the container to be repeatedly and readily opened and closed, and which selectively permits bulk removal and access to the interior of the container, or the broadcast of the contents of the container through one or more limited access openings in the closure.

Abstract: A hopper for use in an automatic weighing apparatus, including a hopper body having a discharge port at a lower end of the hopper body, and a gate, swingably supported at an upper edge of the hopper body, for opening and closing the discharge port. The gate has a main body of which at least the left, right and lower edge portions are formed of a flexible material so that the edge portion comes into resilient contact with the inner surface of the discharge port.

Abstract: A grain handling device for the receiving and transporting of grain and the like with the primary aspects of this invention being related to ground level receiving of such grain from a carrier, such as a truck, holding and controlling such grain and transporting such grain to a storage bin, typically at an elevation higher than that of the grain delivery carrier. The primary aspects of this invention are the positive control of the grain received from the truck into the grain receiving bin through the use of a valve disposed in the grain bin at the outlet thereof for control of the rate of flow of the grain from the grain holding bin into a grain transport. The valve is configured in a unique way to cooperate with sloping bin walls and the bin outlet to substantially seal such outlet in the valve closed position and to prevent bridging of grain within the grain receiving bin, thereby eliminating plugging at the grain bin outlet.

Abstract: A metering device wherein a cylinder is provided with opposite end closures, a piston is shiftable in the cylinder between the end closures, a conduit extends centrally within the cylinder into a valve plug angularly shiftable within the cylinder and located adjacent to one end closure, the valve plug having angularly spaced passageways communicating respectively with opposite sides of the piston upon angular valve shifting, and a gasket extending in sealing relation about the plug and on opposite sides of the passageways to seal the latter from each other.

Abstract: A silo unloader for unloading silage from a discharge opening in a bottom wall thereof includes a housing mounted in the opening having a downwardly extending discharge chute. The chute includes an inner sloping wall having a lower drip edge and a pair of side walls joined thereto with side edges sloping upwardly with respect to the drip edge in a direction opposite that of the sloping wall. The side edges define lower edges of a discharge outlet of the chute. A discharge door is mounted to pivot between an open and a closed position with respect to the discharge outlet and the door includes a resilient gasket around the perimeter adapted to provide an air-tight seal for the outlet when the door is closed. The discharge chute includes a lower sealing bar joined at opposite ends to the sidewalls, and spaced below and horizontally offset from the drip edge so that material falling over the drip edge does not interfere with establishing a tight seal when the door is closed.

Abstract: A pneumatic gate for railway hopper cars which includes a non-tubular valve member deployed above a gate discharge tunnel, with said valve member being actuated by rotation about a bearing shaft which is disposed along an axis parallel with the axis of the gate discharge tunnel.

Abstract: A container for condiments, including a body with a closure cap having a space for absorbent material, and a perforated disc holding the absorbent material in the cap. The body also has a perforated disc enabling the condiment to be shaken therethrough. When the closure cap is in closed position the entire interior space is closed to the exterior, and the moisture in the condiment is enabled to pass through the perforated discs and be absorbed by the absorbent material. In one form, the closure cap is held by screw threads and is entirely detachable, and in another case, the cap is yieldably moved to open position, although still attached, and is automatically moved back to closed position when released. In this case, interfitting elements center the cap on the body. The absorbent material includes various kinds of rice, and a selection of chemical materials.

Abstract: A thermoplastic container closure having a base with an open central area and a peripheral skirt depending from its outer edge for fitting about and attachment to the upper end of a container has an upstanding annular wall about the open center which supports a raised platform thereon which forms a first planar surface parallel to the base, with the platform having apertures therethrough and a shoulder at one end, and a closure flap hingedly attached to the shoulder, the flap having projections matable with the apertures in the platform such that when the flap is closed, the closure flap and shoulder form a second planar surface substantially parallel to both the platform and the base.

Abstract: A pitcher for pouring water or other liquids having a container portion. A lid is hinged at the top of the container portion allowing pivoting of the lid between an open position for access to the interior of the container and a closed position for covering same. A spout is located at the hinge, and a handle is located at the side of the pitcher opposite the spout and hinge, whereby the contents are poured, and the lid opens, in a direction away from the handle. There is also included a flap at the spout opening which is mounted for swinging movement between a closed position with the pitcher upright, and an open position with the pitcher tilted for pouring.

Abstract: A tubular container is provided with a top end punch-out closure comprising a one-piece plastic cap and a rotor on the cap. A punch-out tab defined by a tearing web on the cap can be forced by finger pressure to hinge down from the cap to form a dispensing opening that is aligned with the major dispensing opening on the rotor at the fully open dispensing condition of the rotor. The side of the tab opening opposite the hinge has an arcuate edge that is substantially congruent with a corresponding arcuate edge of the major dispensing opening when the closure is fully open, with the radius of the latter being slightly smaller than the radius of the former to maintain an interference fit if the tab breaks off. The substantially congruent arcuate shapes allow exertion of downward compressive finger pressure at a location sufficiently close to the tearing web to indirectly apply tensile pressure with sufficient concentration to rupture the web.

Abstract: A bottle cap of the pushbutton type having a jacket threaded to fit to the bottle top, and a round pushboard interfitted and pivotally mounted in the jacket with protrusions on the pushboard to control openings of an effluent pipe and an air intake pipe mounted in a check board portion of the jacket, with an effluent port and an air intake path in the pushboard for fluid connection to those respective pipes. The ports on the bottom of the jacket leading to the pipes therein are spaced from each other by use of a shield over the bottom port of the air intake pipe allowing pouring of a liquid from the bottle, using a pushbutton type cap, through the effluent pipe, without interference with the air intake system.

Abstract: A device for accurately controlled feeding of a fine-grained, free-running particulate material from a silo into a reactor vessel, in particular alumina from a day's supply silo to a break in the crust on an aluminium fused salt electrolytic cell, comprises essentially a vertical feed pipe which is situated below the silo and features upper and a lower closing flaps both of which are in the form of segments of a cylinder. The feed pipe mounted on the funnel shaped lower part of the silo features an outlet funnel which joins up with an outlet pipe.

Abstract: Dispenser apparatus for particulate ice and/or ice cooled beverage has an ice bin with upright walls about a substantially vertical axis, a bottom canted rearwardly, a transverse ice discharge chute coplanar with the bin bottom and having a width continually divergent from the bin, a metallic ice dispensing chute point is secured in a resin bin wall on a downstream side of a dispensing rotor sweep and a self-closing dispensing door on an outlet of the chute has a barrier and a limit stop for placing the barrier in the path of ice being dispensed when the door is fully opened, an elongate drainage slot for melt water is in the bin bottom and extends radially outward from an axis of dispensing rotor rotation, a drain port extends from within the drain slot and is at a level below a level of the chute outlet, an ice dispensing rotor is within the bin and is revolvable about an axis canted rearwardly from the axis of the bin; the rotor has a hub, a ring, a plurality of paddlewheels mounted to the ring, entry ring

Abstract: A paste dispenser having a body (1) of plastics with an expanded head (8) having a cap (5) formed integrally therewith by a hinge adapted to engage the head part of the tube with a snap fit, the tube having a nozzle (3) for discharge of the contents, closed by a hollow member (14) in the cap, the cap and head a dimension in width some what similar to the crimped end (9) of the tube being moulded by using in the dies at least one channel (37) to give longitudinal flow of the plastics material during moulding but latterally spread from the channels to enable a long controlled thin wall to be formed.

Abstract: A dispensing cap for a container. The cap has a tubular body of circular transverse cross-section with a wall closing the top end of the tubular body. An upwardly opening slot is formed in the top end wall and extends across the tubular body with a generally flat wall forming the bottom of the slot. An aperture extends through the bottom of the slot into an area surrounded by the tubular body. A hinge assembly is located in the slot and includes an upstanding member formed on the flat bottom wall of the slot at a location inwardly of the circular perimeter of the tubular body. A flap is integrally connected to the upstanding member of the hinge assembly by a strap. A portion of reduced thickness is formed in the strap to create a hinge at the juncture of the strap and the upstanding member. The portion of the reduced thickness of the strap is formed by an inclined slot cut in the tubular body near the top end wall and extending into the upstanding member.

Abstract: A relatively lightweight dispensing cap closure includes a base cap portion for attaching to a container opening and a closure portion mounted for pivotable movement in a depressed socket formed in a top surface of the cap. The top surface is formed with a dispensing orifice and the closure portion is formed with a stopper member which cooperates with the dispensing orifice to open and close the cap. The closure portion has a downturned rear flange portion which is received in the socket to permit the closure portion to lie in a substantially horizontal, closed condition with the stopper plugging the dispensing orifice and a substantially upright, opened condition whereby the closure portion is positioned out of the flow path through the dispensing orifice. The flange portion of the closure is formed with an engaging means as is a front wall of the socket which retain the closure in the full open position. A stop surface is provided to limit pivotal movement of the closure portion in the opened condition.

Abstract: A drop-bottom box (11) which has a bottom wall (18) hingedly connected thereto and which is hooked up in closed position by hooks (30) engaging studs secured to the bottom wall, and which hooks (30) are biased to closed position but which may be released from locking position by a lever (32) biased to a closing position by springs (33).

Abstract: An adjustable and flexible metering gate for a fluted feed cup assembly on a grain drill. The metering gate is fabricated from a flexible material, and the adjusting lever for the gate is located on the side of the cup opposite the portion of the fluted feed roll which is exposed to the grain so that the gate can flex and pass foreign objects without damage and then return to its original position. The feed cup is fabricated from plastic.

Abstract: A relatively lightweight dispensing cap closure includes a base cap portion for attaching to a container opening and a closure portion mounted for pivotable movement in a depressed socket formed in a top surface of the cap. The top surface is formed with a dispensing orifice and the closure portion is formed with a stopper member which cooperates with the dispensing orifice to open and close the cap. The closure portion has a downturned rear flange portion which is received in the socket to permit the closure portion to lie in a substantially horizontal, closed condition with the stopper plugging the dispensing orifice and a substantially upright, opened condition whereby the closure portion is positioned out of the flow path through the dispensing orifice.

Abstract: A hopper discharge apparatus for delivering the contents of a hopper from a hopper side port to alternative delivery points directly under and alongside the hopper utilizing a center delivery chute for directing the hopper contents to the delivery point under the hopper and a side delivery chute for directing the hopper contents either to the delivery point alongside the hopper or to the center delivery chute. Both chutes are movable, optionally about a common pivot point, for storage when not in use.

Abstract: An adhesive discharge device for use with adhesive which sets by the evaporation of a solvent. The device incorporates a valve-controlled discharge nozzle for intermittent discharge of adhesive on a cycle basis. Drying of adhesive around the nozzle opening when the valve is closed and the discharge of adhesive is interrupted is prevented by a movable closure cap containing a solvent vaporizer. The closure cap is movable into a position enclosing and sealing the nozzle opening, and the vaporization of solvent inside the closure cap around the nozzle opening prevents the drying and encrustation of adhesive.

Abstract: The invention relates to a controllable flow pourer mechanism.This pourer mechanism comprises a valve mounted on an actuating device, of such construction that in closed position, the valve is kept in fluid-tight contact upon the lip of the pourer spout and that, from this position, in a first phase, the valve slides upon the lip of the pourer spout and, in a second phase, the valve carries out a rocking movement.The invention is applied especially to effect mixtures of liquid products.

Abstract: A spreader unit is provided for connection to a hopper carried in an airplane for spreading granular material at a controlled rate of flow. A moveable gate on the spreader is moveable between a closed position covering a discharging opening through which the granular material may flow and an open position defining a gap to allow a predetermined flow rate of granular material from the hopper. A new and improved adjustable control 70 is provided in the cockpit of the airplane adjacent the pilot for manipulation by the pilot to control the gate width to an accurate degree to provide the desired flow rate despite deflection or other binding or lost motion in the linkage or levers in the actuating means for the gate. The control is positioned on the spreader adjacent the gate and a spreader extends from the actuator into the cockpit. A turnable handle is positioned adjacent the pilot for adjusting the size of the gap and thereby the flow rate of the granular material from the hopper.

Abstract: A closure device is disclosed herein for use in conjunction with a plastic squeeze discharge container which includes a screw-on type of bottle cap provided with a pair of indentures or cavities arranged normal to each other and a two-pronged, elbow shaped combined actuator and dispensing nozzle which movably fits into the indentures or cavities. A selected cavity is provided with a reduced entrance so as to insertably receive and snap-lock with the dispensing nozzle. The other cavity is formed to correspond to the shape of the actuator so as to recess the actuator into the cap. A finger engaging portion of the actuator extends beyond the exterior of the cap. An orifice is formed in the cap supporting the dispensing nozzle which registers with a hole in the side of the nozzle communicating with an elongated passageway that terminates in a discharge opening.

Abstract: A container closure such as a bottle top or the like is provided having a base portion for assembly onto the container forming a top to the container, the base portion having an orifice therethrough set in a generally planer top surface. A top member lies atop the planer surface and has a hinge defining the top member into two portions, one of which has structure for affixing it in face to face relationship with the planer surface on top of the base. The other portion is movable about the hinge from an orifice closing position atop the planer surface to an orifice open position extending at an angle to the planer surface. A flexible tongue extends into the area of the hinge and is capable of undergoing a snap movement from one side to the other of a raised rib in the planer surface to hold the second portion of the top in the orifice open position at an angle to the planer surface. The second portion of the top may be equipped with a stopper insertable into the orifice.

Abstract: The present invention uniformly spreads a topping material over a wet concrete surface and includes a spreader, a bridge and a drive system. The spreader stores a supply of topping material and dispenses a uniformly wide layer of the topping material as it is translated along the bridge. The bridge supports the spreader above the wet concrete surface and spans the entire width of the concrete surface. The drive systems translates the spreader across the bridge to dispense a uniformly wide layer of topping material over the concrete surface. Sequential lateral translations of the spreader across the bridge followed by sequential lateral translations of the bridge along the length of the concrete surface covers the entire concrete surface with a uniform layer of topping material.

Abstract: A child-resistant dispensing closure fabricated from resilient material which has an inverted cup-shaped body, an axially protruding nozzle and a saucer-shaped lid for closing the nozzle. The lid is connected to the body by a flexible hinge which is unitary with the body and the lid and which is located at one edge of the body. There are cooperating means for retaining the lid in closed position overlying the body and the nozzle, the catch means being located diametrically opposite the hinge. The lid has a maximum diameter no greater than the diameter of the top of the body. The catch means may be at least partially disengaged by moving the lid laterally relative to the body in a direction transverse to the diameter extending between the hinge and the catch means which also protrudes a portion of the lid radially beyond the top of the body. By grasping the protruding portion of the lid, the lid then may be swung angularly away from closing position.

Abstract: A child-resistant dispensing closure consisting of a one-piece molding of resilient material that comprises an inverted cup-shaped cap having a central dispensing opening and a saucer shaped lid that is integrally hinged to the cap at one edge thereof for movement to and from an inverted, closing position closely over-lying the cap. The lid has an element which closes the dispensing opening and engages in telescoping relationship therewith. The cap and lid have overlapping catch means for retaining the lid in closing position. In the closing position, no part of the lid extends beyond the margin of the cap so there is nothing which a small child can grasp in order to swing the lid to gain access to the content material. The hinge is double acting and provides not only for angular movement to and from the closing position but also for lateral movement of the lid relative to the cap against the resilience of the engaged element and opening for disengaging the catch means.

Abstract: A one-piece dispensing closure consists of a cup-shaped cap having means for retaining it on the neck of a container and a lid which is connected by an integral hinge to the cap at one edge thereof and which is adapted to be swung over on top of the cap There are openings through the top of the cap and through the lid, one of which is closed by a stopper element when the lid is swung over and pressed down into closed position against the top of the cap. The relative positions and sizes of the opening in the lid and the stopper element are such that the stopper is withdrawn from the opening when the lid is lifted angularly a short distance to open position by raising the edge of the lid opposite the hinge connection. The cap and lid have cooperating means for limiting the normal, upward, angular movement of the lid away from closed position to open position.

Abstract: A high volume, low profile, quick acting, dispensing pump features valve members provided with flow restricting passages which accelerate the opening and closing action of the valve members and thus make it possible for the pump to handle large volume quickly. The low profile is achieved by wrapping the pressurized compartment around the intake of the pump.

Abstract: A closure for the usual circular array of holes provided in the top wall of a can of cleaner or the like for dispensing the contents of the can. The closure includes a disc overlying the circular array of holes but covering only a minority of the area of the top wall. The disc is divided into a lid portion and a base portion. Protrusions on the underside of the base portion are relatively fixedly retained in their corresponding holes. Protrusions on the underside of the lid portion are relatively releasably retained in their corresponding holes.

Abstract: A method and apparatus for discharging freshly reduced material from a shaft furnace and controlling release of spent reducing gases so that they are not a hazard. The apparatus includes a pair of surge bins and means for directing material selectively to either bin. Gas-seal valves having purge means are located above the respective bins. Gas-seal flapper valves are located below and are movable to positions wholly out of the path of material discharging from the bins.

Abstract: A demountable bottom opening, foldable and reusable container for finely divided materials such as chopped glass fiber strands and other bulk, flowable materials is disclosed. The container is adapted to be mounted on a permanent pallet of great rigidity. The pallet is comprised of a skeletal base frame on which is mounted a shallow crown which receives and supports the container. The crown surrounds a central opening which is closed by hinged hexagonally-shaped flaps locked in position when the loaded containers are stored or transported. The flaps are unlocked to swing down to the sides of the opening so that they do not interfere with unloading of the container thereby insuring complete emptying. The use of an impervious foldable sleeve extending from the opening in the container and which unfolds to serve as a funnel through which the material is unloaded into a hopper beneath the pallet is also disclosed.

Abstract: A plastic lid closure assembly for containers, particularly for packaging purposes, comprising a lid and a lid carrier connected to one another by an integral web hinge, the lid carrier being formed with an upstanding resilient tongue and the lid being formed with a cam or the like adjacent the hinge and operative to transversely deform the resilient tongue on movement of the lid to produce a snap-up effect.

Abstract: A method is disclosed for molding lids for containers of the kind of those intended for holding tiny articles such as dragees, pills, tablets and the like. The lid is molded with the drawer which is intended for masking and ummasking an article-dispensing port, in a position which is different from the normal operative position of the drawer, so as to exploit the resiliency of the plastics material for having the drawer preloaded and causing it to press against the article-dispensing port when the latter is masked by the drawer. A small force is only required to lift the drawer and to swing it so as to unmask the article-dispensing port.

Abstract: A child-resistant dispensing closure consisting of a one-piece molding of resilient material that comprises an inverted cup-shaped cap having a central dispensing opening and a saucer shaped lid that is integrally hinged to the cap at one edge thereof for movement to and from an inverted, closing position closely overlying the cap. The lid has an element which closes the dispensing opening and engages in telescoping relationship therewith. The cap and lid have overlapping catch means for retaining the lid in closing position. The hinge is double acting and provides not only for angular movement to and from the closing position but also for lateral movement of the lid relative to the cap against the resilience of the engaged element and opening for disengaging the catch means.

Abstract: An improved safety closure for containers of harmful products includes an inverted cup-shaped body member formed of resilient plastic material and an integrally molded locking flap connected by an integral hinge to the top periphery of the body member. The locking flap folds into a conforming recess in the top surface or panel of the body portion, and, in its folded position, all edges of the locking flap are flush with the adjacent surface of the panel. One or more dispensing openings are provided in the panel and sealing means are provided on the bottom of the flap to close the dispensing openings in the folded position of the locking flap. Two distinct sets of cooperating locking surfaces are provided on the flap and body portion to retain the locking flap in its folded position. The one set requires a vertically downward pressure on a specific area on the panel to release.

Abstract: An end gate attachment for use on a manure spreader in which the end gate has forwardly extending arms positioned over the upper edges of the manure spreader box. The arms are hollow and open downwardly so as to encompass hydraulic cylinders that extend between the upper edges of the box and the arms for purposes of raising and lowering the arms and the gate.

Abstract: It is known to manufacture closure structures so that each of such structures has a cap part including two spaced, aligned bearings and a movable part extending between the bearings and including trunnions fitting within the bearings. At least one of the parts of such closure structures is formed of a material which is sufficiently resilient so that the trunnions may be snapped into the bearings during the assembly of the closure structure. Such a closure structure may be improved so as to reduce damage to one or both of the parts during the manufacture of such a closure structure by shaping the trunnions and the bearings so that they both have shapes of surfaces of revolution which decrease in diameter in accordance with the distance from the portion of the movable part fitting within and between the spaced bearings. The entrances employed should also decrease in width in a corresponding manner.

Abstract: A bunker closure door mechanism for a bunker housing which has an opening with a seat around the opening which is closed by a closure door body, comprises, first and second spaced apart end levers which are pivotally connected between the housing and one end of the door. In addition, central levers are pivotally connected to the door body intermediate its length and pivotally connected at their opposite ends to a toggle lever which is pivotally mounted on the housing. The door body carries guide pins which are engageable in vertical slots of guide members supported on the bunker housing. By means of an actuator in the form of a fluid-pressure operated piston and cylinder connection, a guide rod is actuated to engage the central lever intermediate its length and to pivot it about its connection to the toggle lever and to also shift the toggle lever over its dead center position.