Abstract: An aerosol valve device for use with spray canisters using compressed gas as a propellant. The valve device comprises an aerosol valve and a connector for a riser tube which, in the operative condition, extends nearly to the bottom of an aerosol container. A two-way valve is provided between the aerosol valve and the connector. The two-way valve comprises a body with a central bore, in which two opposed valve seats are formed to seat a valve member movable to and fro between said valve seats, and an automatic actuating element for actuating said valve member control the valve member depending on the position of the container.

Abstract: A gas actuated valve system includes a gas switch disposed in a primary gas circuit upstream of a gas driven actuator. The switch is movable to an open position when a pilot gas is supplied under pressure to the gas switch through a pilot circuit, and is movable to a closed position when the pilot pressure is released. A seismic valve coupled to the pilot circuit senses seismic activity and releases pilot gas pressure, thus moving the gas switch to the closed position, when seismic activity is detected.

Abstract: A fuel tank for storing aggressive liquid fuels, especially fuel for operating satellite engines has an oblong shape with hemispherical ends. A fuel collecting device (12) is arranged inside the fuel tank. The collecting device is so constructed and equipped with guide vanes for feeding the fuel, and with a pipe system including collecting vessels with screens that a fuel supply to the engines is assured under any conceivable operating conditions, since surface tension and capillary forces assure a refilling of the collecting device inside the fuel tank.

Abstract: An inverted flight valve between a scavenge pump intake and bottom and top drains of an oil sump in an engine of an aircraft having inverted flight capability, the valve including a valve body with a closed bore therein, a main port in the bore connected to the scavenge pump intake, first and second ports in the bore on opposite sides of the main port and connected to the bottom and top drains, a pair of valve seats in the bore between the main port and respective ones of the first and second ports, and a valve spool having lands at opposite ends slidable in the bore. The valve spool slides in the bore under the influence of gravity between a first position in non-inverted flight wherein one land seats on one of the valve seats to seal the top drain and a second position in inverted flight wherein the other land seats on the other valve seat to seal the bottom drain.

Abstract: A valve includes a housing having an inlet, an outlet, and a passageway that connects the inlet and the outlet in fluid communication. A valve member on the housing for opens and closes the passageway and an actuator on the housing that is responsive to movement such as may accompany an earthquake causes the valve member to close the passageway automatically in the event of such movement. The actuator may include a spring for driving the valve member from an open position to a closed position, and a trigger mechanism responsive to movement such as may accompany an earthquake for holding the valve member in the open position until the occurrence of such movement and then enabling the valve member to move to the closed position under influence of the driving means.

Abstract: A pressurized container (1) including a system for blocking the actuating device (5) of the valve (4) when the container (1) is not in a proper position is proposed, which includes a movable element (6), at least partly of ferromagnetic material, that cooperates with a magnet (33) having a force of magnetic attraction less than the weight of the movable element (6), and which is disposed in such a manner that the movable element is attracted and retained by the magnet to block the actuating device (5).

Abstract: A valve for preventing the flow of fluid through a vehicle fuel delivery line after the vehicle experiences a sudden impact such as occasioned by a collision or other accident. An inertial member is operably coupled with a plug which is extendable to block a fluid passage in the valve. The inertial member is normally maintained in a seated position and prevents extension of the plug into the fluid passage. The inertial member is released from the seated position in response to a directional force of a predetermined magnitude. When the inertial member is released from the seated position, the plug is extended into the fluid passage by a spring to block fuel flow. The inertial member is non-responsive to a direction force exerted along at least one axis.

Abstract: A low cost sprayer and method of using the sprayer is disclosed. The sprayer is formed with a length of flexible tubing having an inlet end and a tubing outlet end. A nozzle is secured to the outlet end of the hose in a manner to provide a predetermined flow pattern upon rotation of the tubing and nozzle. In use, the inlet end of the tubing is placed within an agricultural chemical containing tank and a predetermined length of the remainder of the tubing is rotated by a worker as he walks through the area to be sprayed. By varying the radius of the rotating portion of the tubing and by varying the type of spray nozzle employed, the swath width and the droplet size of liquid chemical application can be closely controlled. Granular agricultural chemicals can be applied by rotating a granular material nozzle about its axis while rotating the tubing in a vertical plane.

Abstract: Disclosed is an apparatus and a related method for removing sand, trash and other materials from a spa, pool, aquarium or other fluid bodies and which includes a hollow, generally tubular member with an exhaust opening along the tubular member near the bottom end for venting fluid, and with a fabric bag fixed over the exhaust opening for passing the fluid but retaining the recovered material. One-way valve near the bottom end and in the exhaust opening ensure that fluid flow passes only upwardly through the tubular member and thereafter out of the exhaust opening.

Abstract: A manual air pump for two wheel tires comprises means forming a pressure chamber, a head part, a first connecting element for connecting with a bicycle valve and a second connecting element for connecting with an air pin of a motorcycle valve, the head having a connecting passage which connects the first connecting element with the second connecting element and communicates with the pressure chamber, and a closing body arranged movably in the connecting passage so that under the action of its own weight it can close the first connecting element or the second connecting element in one of two different positions of the head.

Abstract: An air actuated valve system for shutting off fluid flow in a fluid conduit includes a seismic valve disposed in a seismic air circuit which is coupled to a primary air circuit. The primary air circuit delivers air at a high pressure to an air driven actuator which maintains a shut off valve in a fluid conduit in an open position. The high air pressure flows through an air switch which is operationally open and coupled to the seismic air circuit such that when the seismic valve is closed a pilot air pressure is prevented from flowing to the air switch. In the absence of the pilot air pressure, air pressure is bled from the air switch, causing the air switch to move from an open to a closed position, thus preventing air from flowing to the air actuator.

Abstract: A shock actuated valve including a first structure mounted to swing about a first axis and which is releasably retained by a first latch in a first position, with the latch being automatically releasable when the device is subjected to earthquake forces or other shock forces, and a second structure including a valve and which is mounted to swing about a second axis and is releasably retained in an open valve position by a second latch controlled by the first swinging structure. When shock forces cause release of said first structure for swinging movement from its reset position, such swinging movement automatically releases the second structure and its valve for spring urged swinging movement in a direction closing the valve.

Abstract: A shock responsive device for automatically actuating a valve or other controlled unit in response to earthquake forces, including a weight which is displaceable from a pedestal or other support by shock forces, an element at a first side of the support actuable by the weight to operate the controlled unit, and a guide structure onto which the weight can fall at a second side of the support and which is constructed to direct the weight from that side to the first side for actuation of the element and controlled unit. The guide structure preferably extends circularly about the support and is inclined to direct the weight by gravity to the first side of the support from any other location thereabout. The guide structure may be vertically movable relative to the support to return the weight to the normal position on the support for resetting of the mechanism.

Abstract: A check valve for use in a vehicle engine fuel system comprising a fuel storage tank, a fuel feed line for delivering fuel from the tank to the engine, and a fuel return line for returning unused fuel from the engine to the tank. The valve is mounted on the return line in the fuel tank to be operable by a combination of flow-induced pressure reduction and fuel ram pressure to prevent reverse flow of the fuel through the return line in the event of reverse flow conditions.

Abstract: A shock activated shut-off device which can be used in any position includes a housing, a drive member rotatably mounted within the housing, a first member movable rectilinearly from a first position to a second position and a second member movable rectilinearly from a third position to a fourth position. An inertia ball engages the first member to move it from the first position to the second position in response to a vibration or shock imparted to the housing, and movement of the first member causes movement of a trigger ball disposed between the first member and the second member. Movement of the trigger ball allows the second member to move from the third position to the fourth position and thus to release engagement between a locking ball and a locking ball receiving seat in the housing. A torsion spring is connected between the drive member and the housing, whereby the drive member can be rotated against the force of the torsion spring to load the device.

Abstract: A gravity and acceleration responsive valve apparatus having a housing with a number of inlet ports through which communication is controlled by respective valve members. The valve members in conjunction with space maintaining weight transfer means movable in the housing respond to acceleration force and to gravity to open only selected inlet ports while maintaining all other ports closed. The valve has utility particularly as a tank vent or liquid pickup valve aboard aircraft.

Abstract: An apparatus for applying a liquid chemical to plants includes an elongate hollow body which contains a liquid chemical. In use, the hollow body is transported through the plants in a direction transverse to the length of the elongate body. The elongate body includes a row of bottom holes and a row of side holes positioned along the leading side of the elongate body. A canvas cover is tightly wrapped around the elongate body in a double layer and the peripheral side edges of the canvas are sealed. The elongate body is filled with the chemical and an air valve is adjusted to bleed air into the interior of the elongate body. The elongate body is then moved through the field and, by adjusting the position of the elongate body above the ground, the chemical which has seeped into the canvas is wiped onto the plants. In a preferred embodiment, the elongate body is circular and made of a plastic material.

Abstract: A pressure and attitude responsive valve comprises a resilient substantially cylindrical hollow valve body having an opening in one end to receive a pressurized fluid to be regulated. The opposite valve body end is closed by a frusto-conical end wall having a central opening therein. A valve ball, larger than the opening but smaller than the valve body bore, is disposed within the valve body to open or close the opening depending on the attitude of the valve body. Longitudinal slits in the wall of the valve body permit resilient deformation of the wall and an opening of the slits upon occurrence of a predetermined pressure gradient. The valve is disposed in a valve housing in series with a check valve to comprise a shunt valve assembly for treatment of hydrocephalus.

Abstract: A gravity responsive regulation valve assembly having a housing with at least two intake ports both of which may fluidically communicate with an outlet port. The valve assembly further includes a spherical valve actuator moveable along a predetermined path of travel in response to gravitational and/or centrifugal forces for automatically closing one of the valve assembly intake ports when the housing is tilted.

Abstract: An air actuated valve system for shutting off fluid flow in a fluid conduit includes a seismic valve disposed in a seismic air circuit which is coupled to a primary air circuit. The primary air circuit delivers air at a high pressure to an air driven actuator which maintains a shut off valve in a fluid conduit in an open position. The high air pressure flows through an air switch which is operationally open and coupled to the seismic air circuit such that when the seismic valve is closed a pilot air pressure is prevented from flowing to the air switch. In the absence of the pilot air pressure, air pressure is bled from the air switch, causing the air switch to move from an open to a closed position, thus preventing air from flowing to the air actuator.

Abstract: A pouring nozzle for a soft drink, milk or liquor bottle, carton, or the like, which has a feature in that when the container is in an upright position, the nozzle automatically closes to seal off the container. The nozzle includes an internal ball which floats on liquid trapped in the nozzle to close and seal the nozzle when the container is upright. However, the ball is forced into a cavity in the nozzle when the container is tilted over to permit liquid to flow freely from the container through the nozzle.

Abstract: Apparatus for shutting off utilities, such as gas and electricity, automatically in the case of an emergency, such as an earthquake. The utility can be a gas or electric line and, at shutdown, an alarm may be sounded and a light activated. The apparatus includes a box mounted adjacent the main power panel. The box includes a solenoid wired to the main breaker switch of the main power panel and a start/stop switch coupled to the solenoid valve at the main gas line. If an earthquake hits, the solenoid to the electric panel is activated to shut off the main switch. This in turn activates the solenoid to the gas line which turns off the gas. Simultaneously, a signal alarm coupled to the box sounds and a light also coupled to the box is lit. The alarm may be turned off manually and the light kept on, if desired. After the emergency, the control panel may be reset and the gas turned on after manually opening the gas valve and re-lighting the pilot.

Abstract: An inertially operated valve for a fluid conduit which upon occuring a jarring force, such as an earthquake, the valve is moved to a shut-off position. The shut-off position occurs when a plug is caused to be jarred free from a holding position and then fall by gravity to block the flow of fluid through the valve. The holding of the plug in the retracted position, not blocking flow of fluid, is accomplished through the use of a magnet. A separate magnet is also utilized to hold the plug in the extended/blocking position. A resetting device is to be manually operated to move the plug from the extended/blocking position to the retracted position.

Abstract: Apparatus for supplying liquid from a tank (12) to an inlet of a pump (40) without interruption when the condition of the tank changes to a reversed gravity condition, includes a hollow, standpipe body (20) having a first inlet opening (26) and a second inlet opening (28). Internal walls divide the standpipe into a first compartment (32) in communication with the tank through first opening (26), a second compartment (36) which is in communication with a pump inlet port (38) connected to the inlet of pump (40), and a third compartment (42) which is in communication with the tank through second inlet opening (28). Third compartment (42) is also in communication with the discharge of pump (40) through a bleed line (46). The first and second, and second and third compartments are in fluid connection through holes (48) and (50) respectively, in the dividing walls. A vertically moveable spool (52) includes a weighted upper disc (56) and a weighted lower disc (54).

Abstract: A fuel tank construction comprising a tank and a sump is disclosed which construction includes a float operated water separator. The separator operates automatically to drain water which has separated out and accumulated at the bottom of the sump. The separator is in the sump which is secured to the underside of the tank. The tank has an opening through which the sump and tank communicate, and there is a normally open one-way valve in this opening. This valve prevents water and solids flowing back into the tank from the sump if the tank construction is inverted. Within the tank there is a filter through which fuel flows to reach the fuel outlet line. The filter is normally spaced along the tank from said opening but can be displaced to a position overlying the opening when access to it through said opening is required for servicing purposes.

Abstract: An earthquake triggered gas valve in which the valve member on an axial valve rod is forced open by a ball propped between the end of the valve rod and a retractable post in the conical floor of the valve outlet chamber. The ball is at least partially filled with a dense fluid such as mercury which has a inertia that will oppose that of an earthquake moved valve housing. The ball will thus be dislodged to permit the valve to close. The valve is easily reopened by lowering the retractable post to reset the ball which is then lifted to raise the valve rod and valve.

Abstract: An improved dental suction device is disclosed comprising a suction line and automatic, orientation-responsive switching means adapted to provide suction at the inlet when the device is aligned in a first operative orientation and turn off the suction at the inlet when aligned in a second standby orientation.

Abstract: A valve movable elevationally in a valve casing between a lower closed position and an elevated open position is or carries a magnetizable component of magnetic means. Upward movement of the valve is limited by engagement with an annular stop flange projecting downward from the upper portion of the casing. A permanent magnet component of the magnetic means is received inwardly of the annular stop flange and is movable upward by cooperating screw threads to separate the magnet component from the armature carried by the valve after the valve has been raised from closed position into engagement with the stop flange by elevational movement of the permanent magnet component relative to the valve casing.

Abstract: An automatic safety mechanism including an actuator for operating a valve or other controlled unit and which is operable by compressed air or other pressurized fluid, a valve structure for controlling the delivery of pressurized fluid from a source to the actuator, a shock responsive mechanism operable by shock forces to actuate the valve structure to a condition operating the actuator by fluid from the source, and a device operable automatically in response to a decrease in the pressure of fluid from the source to admit pressure fluid to the actuator for operating it. An assembly for resetting the shock responsive mechanism to a cocked position includes a shaft operable by rotation about an axis to set the mechanism, a sleeve disposed about the shaft, and a retaining element movable to a position in the path of axial removal of the sleeve from the device to retain both the sleeve and shaft against withdrawal.

Abstract: A shock actuated shut-off valve for fluid flow lines is provided which includes a valve housing having a central chamber in communication with inlet and outlet conduits and with a hollow, outwardly enclosed stowage arm in upward, substantially plumb communication with the central chamber. A valve element having a longitudinal aperture incorporating non-occlusive abutment means is releasably supported in the stowage arm for vibratory displacement to and sealing engagement with the central chamber. An inner closure is sealingly disposed in the stowage arm above the valve element. A tether slidably and sealingly extends through an aperture in the inner closure and extends, in spaced relationship, through the aperture in the releasably supported valve element, with the lower end of the tether incorporating a lift member disposed, in a non-obstructive static position, below the abutment means.

Abstract: A vibration or shake activated mechanism is provided for operating a valve which has inlet and outlet ports and a valve disk rotatably mounted in a valve body. A spring interconnects the valve body and valve disk to urge the valve disk toward its closed position, and a trigger arm is movably, preferably pivotally, connected with the valve body and has a catch tongue for engaging the valve disk to retain it in its open position. An inertial mass connected with the trigger arm and spaced from the catch tongue effects relative movement between the mass and the valve body to disengage the catch tongue from the valve disk to release it to rotate to its closed position. The mechanism may provide response to vertical shake or vibration, horizontal shake or vibration, or both.

Abstract: A novel anti-G suit valve system is disclosed which provides very rapid response to imminent high acceleration. The disclosed embodiments of the new valve system can be retrofitted to existing mechanical anti-G valves to create a hybrid valve system capable of achieving the desired qualities of fast triggering of the valve in response to imminent acceleration and maximum rate inflation of the anti-G suit. The new valve system measures acceleration and, by differentiation, the rate of change of acceleration. When both acceleration and rate of change of acceleration exceed preselected values, a solenoid mounted in place of the press-to-test button on a mechanical anti-G valve is energized for a preselected period of time to fully depress the valve spindle, providing maximum rate delivery of pressurized air. The hybrid valve reverts to normal operation at the end of the preselected period of time.

Abstract: This invention relates to a suction housing of a lubricating-oil pump inserted in a lubricating-oil storage tank of an aggregate of vehicles having a distributing regulator with a mass that is guided in the direction of the accelerating forces affecting the vehicle for the regulating of valve openings. In order to obtain a suction housing with a low overall height and a simple arrangement of valves, the distributing regulator is developed to be plate-shaped in which case the valves are movably suspended at the sides of the distributing regulator.

Abstract: A spray valve assembly for an aerosol container comprising a valve housing which can be sealingly fixed into the top of the container, the housing defining a main passage for the throughflow of the contents of the container, a valve stem within the housing forming the main valve, an immersion pipe extending from the main passage in the housing, a secondary passage communicating the container and the main passage in the housing for the throughflow of the contents of the container when the container is inverted, an auxiliary valve disposed between the secondary and main passages, which auxiliary valve is disposed eccentrically within the valve housing.

Abstract: A normally open gas supply safety valve sensitive to earthquake accelerations on x, y and z axes to displace a ball valve restrained by an arcuate groove with edges over which the ball valve rolls onto a seat for positive shut-off, including an abutment to ensure ball movement onto the seat, and including a leveler for installation.

Abstract: An earthquake tremor responsive valve closing assembly that includes a magnetically suspended pendulous weight adapted to be dropped upon a cocked trigger assembly for an internally spring biased gas line valve in response to a decrease in magnetic retention force resulting from tremor induced displacements.

Abstract: A pneumatic suspension system between relatively-vibratable structures has a single expansible pneumatic working chamber for pneumatically isolating the vibrations between the structures and inlet and outlet valves responsive to a control for opening only one at a time in response to vibrations which exceed respective vibration thresholds. The valves then admit or vent gas from the working chamber to damp vibrations in the threshold-determined range which includes resonance.

Abstract: A main storage tank (2) is pressurized by engine bleed air. A supply tank (12) communicates with tank (2) and with an engine feed line (50). A fluid impermeable expandable wall (34) separates tank (12) into isolator chamber (38) and pressure chamber (40). A surface tension screen (44) covers inlet (42) into isolator chamber (38) to allow liquid fuel to enter chamber (38) and prevent gas from entering chamber (38). During operation of the flight vehicle, a fuel pump withdraws fuel from chamber (38). Pressure chamber (40) is vented to ambient air when the flight vehicle is under no power or is operating under g forces greater than zero, to allow wall (34) to expand and contract to compensate for changes in temperature and pressure. Chamber (40) is pressurized by engine bleed air when the vehicle is operating under zero or negative g forces.

Abstract: A seismic activated valve having a sphere of magnetic material held above a valve seat by a magnet located at the apex of a dome, whereby the inertia of the sphere will cause it to roll along the curvature of the dome to move it vertically away from the magnet and out of axial alignment with it when the valve experiences a horizontal thrust.

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: A valve assembly for relieving intracraneal pressure includes a valve housing adapted for implantation and having an inlet port for connection to a ventricular catheter and an outlet port for connection to a venus or peritoneal catheter. The valve housing includes a fluid passage, the flow through which is controlled by a first pressure responsive valve of relatively high resistence and a second pressure responsive valve of relatively low resistence spaced downstream of said first pressure responsive valve. An attitude responsive valve is disposed in said fluid passage in parallel with said first pressure responsive valve. The valve assembly is implanted in a patient with the attitude responsive valve in a closed position when the patient is in an upright position and in an open position when the patient is in a horizontal position. The employment of pressure responsive and attitude responsive valves in parallel provides ventricular pressure relief regardless of the patient's position.

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: An aircraft safety fuel tank is provided and consists of a safety seal fuel filler neck secured to an inlet opening of a housing, a quick coupling engine fuel line holder secured to an outlet opening of the housing, a protective covering wrapped around the housing and at least one strap for supporting the tank to the aircraft.

Abstract: A device adapted to be actuated by seismic forces or other shock forces, to operate a valve or other controlled unit automatically when the device senses such forces. The device includes a support structure on which a weight is supported in a predetermined position relative to which the weight is displaceable laterally by shock forces in a manner causing a coacting element to be moved by the weight and actuate the controlled unit. Releasable holding means actuated by the weight function to retain the specified coacting element against movement in a direction to actuate the controlled unit so long as the weight remains in its predetermined normal position, to thereby prevent undesired actuation of the element and controlled unit by transitory forces which do not displace the weight laterally.

Abstract: In a seismic actuated shut-off valve, a valve seat is placed between, and in communication with an inlet and outlet. A circular track is located above the valve seat and a plurality of balls ride in the track. A specifically shaped obstruction on the track causes a ball to leave the track at a predetermined seismic level, the ball falling onto the valve seat to shut off the gas flow through the valve. A reset rod can be extended through the valve seat in order to push the ball off of the valve seat and back onto the track in order to reopen the valve.

Abstract: The invention relates to fluidic transducers of electrical signals from an electronic computer for accurately metering flow of a liquid to a utilization device. A liquid filled hollow channel means is accelerated along the flow axis thereof to produce a fluid control signal for a bistable fluidic switch element having a pressurized, cross-over type interaction region leading to a common outlet and to a pair of output passageways. In a preferred embodiment, electrical signals from an electronic computer are supplied to a coil centered by a spring in a magnetic field, first in one direction of current flow and then in the opposite direction, to introduce bidirectional movement of the coil and the hollow channel means coupled thereto. The signals are preferably frequency modulated (but may be pulse width modulated).

Abstract: An hydrostatic drive unit for driving a motor vehicle is provided including a pump, a hydraulic motor, connecting means between said pump and motor, a branch line connected to the connecting means, a shut-off means located in said connecting means, measuring means in said shut-off means for measuring the horizontal forces arising in the direction of the longitudinal axis of the vehicle, said shut-off means acting on the hydrostatic drive unit, said measuring means including a mass capable of being displaced in the direction of the longitudinal axis of the vehicle against a forcible stop, resilient means acting on said mass to position the same normally in a center position capable of movement in two directions on the longitudinal axis of the vehicle and in working connection with the shut-off element whereby during the exertion of force upon the forcible stop, said mass acts directly or indirectly on said shut-off element to control fluid flow in said connecting means.

Abstract: A servo operated system for controlling pressurization of an aircraft pils anti-G suit during high energy maneuvers has a servo operated control valve and a feedback loop controller for minimizing pressure lag in the suit. The controller has dual modes of operation: one for normal flight conditions and one for combat flight conditions. The normal flight mode provides nominal G-protection while the combat mode provides faster response by prepressurizing the anti-G suit to a bias level and lowering the G-force threshold. While in the combat mode, the crewman may select an adjustable pulsating signal to be superimposed on the prepressurization level to obtain additional comfort. Alternatively, he may select a superimposed pulsating signal which is synchronized with his own heartbeat to reinforce the pumping action of the heart.

Abstract: A ventilation device on a top wall of a fuel tank mounted on a motor vehicle includes an upper panel fixedly mounted on an inner surface of the top wall of the fuel tank and extending substantially horizontally, the upper panel having an opening vented to atmosphere. A middle panel is fixedly mounted on a lower surface of the upper panel, and a lower panel is fixedly mounted on a lower surface of the middle panel and has first and second openings communicating with an interior of the fuel tank. The lower and middle panels jointly define first and second passages, and the upper and middle panels jointly define a chamber. The first and second openings communicate with the first and second passages, respectively, and the middle panel has first and second through holes providing communication between the first and second passages and the chamber, the opening in the upper panel communicating with the chamber. The ventilation device is capable of effectively ventilating air and preventing fuel from leaking.

Abstract: An actuator responsive to seismic or other shock forces includes a first swinging arm yieldingly urged pivotally in one direction and releasably retained against such swinging movement by shock responsive means acting to permit swinging movement of the arm in response to predetermined shock forces, a second arm for actuating a controlled element and which is swung through an angle shorter than the first arm by a mechanical advantage linkage including two links pivotally connected together at first ends and pivotally connected at second ends to a support structure and to the mentioned second arm, together with a third link operable to swing the first and second links from relatively angularly disposed positions toward aligned and preferably overcenter positions in response to the swinging movement of the first arm to cause the desired relatively smaller movement of the second arm with resultant increased force applicable to the controlled element.