Abstract: An electromechanical device having a size no larger than about 10 microns utilizing a working fluid in the high pressure liquid or supercritical fluid state. A process of preparing the electromechanical device involves the introduction of the liquid or supercritical fluid therein which permits the retention of the working fluid in the liquid or supercritical state after introduction.

Abstract: There is a valve assembly for controlling the admission of a fluid such as air into a vehicle tyre or other pressure vessel. The assembly includes a housing (1) with a valve assembly (10) movable therein by a predetermined pressure in said vessel against a spring 5A. The valve member (10) is movable from a first position at which ports (14) of an inlet passage (13) in the housing (1) are open to fluid flow into the vessel to a second position at which the ports (14) are closed by the valve member (10). In use of the valve assembly when the valve member (10) is biased to the first position by the spring 5A the fluid can flow into the vessel until pressure therein reaches the predetermined pressure and the valve member (10) is moved to the second position to terminate flow into the vessel. The valve assembly also includes a low pressure indicating means comprising a transparent cap 3A with an opaque band (23) and a collar (8) movable with the valve member (10).

Abstract: An inflation and deflation device for an inner tube and an inner tube provided with this device are described. The inner tube is elastically expandable for the introduction of fluid into its internal volume and can be housed in the space between tire and rim, which can be isolated from the external environment at atmospheric pressure. The device does not have elements for connecting the internal volume of the inner tube and the environment outside the wheel.

Abstract: A device for inflating and deflating a flexible container which is elastically expandable for introduction of pressurized fluid into an internal volume of the container is described. The device is housed inside a cavity isolable from a surrounding environment, the device being inserted in a wall of the container. Pressurized fluid can flow from the surrounding environment into the cavity and from the cavity out to the surrounding environment. The device does not have elements for connecting the internal volume of the container and the surrounding environment.

Abstract: A vehicle wheel includes a tire that is sealed to a rim. The tire is inflated with air to a desired pressure level via a valve assembly. The valve assembly includes a valve stem with an elongated body having a central bore extending longitudinally through the body. A pressure sensor is mounted within the bore to measure the air pressure within the tire. A ball and plunger valve member is engagable and disengagable with a valve seat formed within the bore. A central tire inflation system uses the pressure sensor to monitor the tire pressure for each wheel on the vehicle. When the pressure sensor measures an air pressure in the tire that is below a desired level the central tire inflation system inflates the tire with air until the desired pressure is achieved.

Abstract: A tire pressure indicator is mounted onto the fill stem of a tire and provides a window for indicating if the tire has adequate pressure or not. The indicator show adequate, marginal and underinflated conditions by color bands opposite the window. The pressure indicator may be permanently mounted onto the tire and used to fill the tire and maintain pressure in the tire. As the tire is filled the indicator moves from one color band to the next until the indicator shows that adequate pressure has been attained whereupon the hose may be disconnected.

Abstract: A tire inflation valve stem comprises a stationary, radially outer stem part (3); a movable, radially inner stem part (4) slidable axially within the outer part; a compression reaction spring (20) extending between the core parts; and a flexible barrier (23) extending from one core part to the other to prevent air leakage between the parts. The flexible barrier comprises a thin walled, soft elastomeric tube sealed at its ends to the respective core parts and with an intermediate part curved back on itself in a free rolling manner within a variable length annular space between an external cylindrical surface (19) of the movable core part and an internal cylindrical surface (12) of the stationary part.

Abstract: A valve system includes a movable microelectromechanically structured (MEMS) pressure sensor that not only senses pressure but also functions as a mechanical actuator for the valve. An alternative valve system includes a MEMS pressure sensor that extends through an aperture in a curved wall, such as a curved wall of a valve body or a valve core, at an oblique angle to allow it be securely mounted in the confined space of an automotive-type tire inflation valve. The valve system includes a transmitter integrated with the valve and a receiver located at a remote location, such as the passenger compartment of an automobile.

Abstract: A tire valve stem having an integral pair of O-rings over which a pressure gauge or other device can be mounted by sliding a mating collar provided on the device over the O-rings. The O-rings provide an air-tight seal against the collar, and allow the device to rotate relative to the stem, either during or after mounting, to position the device anywhere within a 360° arc around the stem. The O-rings are located on either side of an orifice which extends through the valve stem, beneath the valve. Air passes from the pressurized valve stem, through the orifice, into an air-tight region between the O-rings, valve stem and collar. A port in the collar allows air to pass through the collar from the air-tight region into the device.

Abstract: An improved automobile tire inflater gauge for tankless air systems having vandal-resistant locking means for attaching gauge accessories comprising a smooth-bore female cylindrical chamber suitable for accepting accessory insertion members, said insertion members having o-rings and circumscribing lock notch groove. Said insertion member locked in chamber by a spring-ring mounted on exterior of chamber housing, said spring-ring having notches which penetrate said housing wall and enter lock groove on insertion member. The gauge additionally having a replaceable barrel cushion sleeve to reduce impact damage and an internal checkvalve to prohibit explosive tire gas migration.

Abstract: A multi purpose portable hand held compressed air power unit for spraying liquids from a tank or for inflating inflatable items. Said power unit having a trigger operated battery system and external electrical source provided in a housing having an electric motor and an air compressor. An air conduit pipe extends downwardly from the housing supplying compressed air into a liquid tank for spraying or to modified attachments attachable to inflate items such as tires, tubes, water floats or other inflatable items. The alternative electric power source can be used to replace the batteries.

Abstract: A new Portable Tubeless Tire Inflating System for forcing a large volume of air into a tubeless tire which presses the side-walls of the tire against the rim, thereby setting a bead so the user may fully inflate the tire using a conventional valve stem. The inventive device includes a conventional portable air tank and an air releasing means attached to the conventional portable air tank providing a burst of air to a tire during mounting.

Abstract: Tire inflation system and process, especially intended for truck or heavy equipment tires. A tire inflation system of this invention comprises, in the order named, a tubular air-inlet member adapted to be connected to an air pressure source and having an on-off valve therein; a pressure regulator which is setable to a desired outlet pressure; swivel fitting; a two-step disconnect coupler having a manual actuator which, on a first actuation, releases pressure downstream of a coupler and, on a second actuation, releases an air hose which is releasably connected to the coupler on the downstream thereof; and an air hose releasably connected to the coupler and having at its outlet end a clip-on chuck for connection to an air valve of a tire to be inflated. The preferred coupler is a push-button coupler. Air flow through the system may be initiated by opening the on-off valve.

Abstract: A valve/transducer and system for pressure measuring: which has a valve/transducer (24) comprised of an appropriately dimensioned tapered barrel (30) of rigid material with a gasket (40) near the barrel's larger diameter proximal end. The valve/transducer has an opening closable by valve cup (32) which is operated by a pin (34) extending from the barrel. The valve/transducer has within the barrel an integrated silicon circuit (44) and flex circuit electrical interface (76). The integrated circuit provides a pressure transducer (58) and an integrated processor/encoder (68). The system includes wireless transmitter/receiver paired circuits consisting of a transponder (26) and a transmit/receive channel circuit (164). The system includes a control/display processor (162) and an indicator (182) with novel displays of useful tire inflation and maintenance parameters.

Abstract: There is provided a device for filling an inflatable protective cushion to a predetermined air pressure. The inflating device has a handle having an inlet port for receiving compressed air and a valve for opening and closing the inlet port and an air outlet port. A housing having an air chamber is connected to the handle and receives the air from the handle outlet port through an air channel terminating in an orfice which creates a vacuum in the chamber. The venturi effect draws additional air through a muffler connected to the housing chamber during filling. The muffler serves to restrict air flow from and to the atmosphere during and after filling of the cushion. The housing also includes a nozzle connected to the air outlet for insertion into a self-sealing valve in the cushion for filling with air. Also provided is a fill indicator comprising an indicator mount secured in the housing, an indicator button extending through an opening in the mount and moveable upward and downward therein.

Abstract: Disclosed is an indicator system for use with inflating devices that use a cylinder of compressed gas. The indicator system is comprised of a cylinder adapter which receives and supports a cylinder and, concurrently, is received by an inflating device. The cylinder adapter includes an indication means that signals whether the attached cylinder is full or has been discharged by way of the indication means being responsive to the high pressure release from the cylinder during a discharge. The indication means incorporates the use of the color green to signify that the cylinder is full and the color red to signify that the cylinder has been discharged. The indicator system is designed to have a one-time use after which it is disposed of.

Abstract: The present invention is a tire air-injection device provided in the car for easily and rapidly injecting air into a tire to maintain the tire pressure at an optimal level when tire pressure drops below a reference value. A compressor provided in the car is connected to an engine of the car through a power transfer means by operating a main switch, which is provided at the outside of the car. Compressed air is injected in the tire by the compressor into the tire through a flexible hose of which one end is connected to the compressor. A relief valve, which is provided for regulating pressure of the air flowing through the hose.

Abstract: Improved valve presents a threaded end, suitable for permitting the positioning of a valve core which is in charge of performing the opening or closing of the passage of air. Over the end threaded portion, a device is mounted with assembly for closing the mouth of the valve and for actuating the valve core, the device including a main body, or a main body and an external body coupleable with each other, a rod and a spring. The device presents a mouth of preferably trunco-conical shape and various peripheral external ribs. The rod presents a cylindrical shape having at the rear end an axial orifice, and at the front end a head preferably of trunco-conical shape, the valve permitting the charging and discharging operation of air in a tire, capable of performing an air-tight closure caused by the action of a toric joint mounted on the pushing rod of the valve.

Abstract: A tire air pressure warning device for dual tires mounted on a common hub of a vehicle comprises a housing mounted on a hub component and having first and second pressure sensors connected in flow communication with a corresponding one of the vehicle tires. A first indicator is pivotally mounted on the housing for displacement between stored and actuated positions, and a second indicator is mounted on the first indicator for displacement therewith and for pivotal displacement relative thereto in response to displacement of the first indicator from the stored to the actuated position thereof.

Abstract: A visual tire cap pressure gauge which comprises a cap member. A structure within the cap member is for securing the cap member to a valve stem on a tire in a motor vehicle. A lens is mounted in a top end of the cap member. An assembly within the cap member is for visually indicating when air pressure within the tire drops below a set point, so as to enable a person at a glance to tell if the tire needs more air.

Abstract: A tire pressure indicator which includes a valve stem over-pressure indicator and a valve stem cap under-pressure indicator. The valve stem includes an air porting scheme that releases over-inflation air for escape through a whistling reed configuration. The valve stem cap includes a top translucent panel for coaction with a diaphragm spring contained therebelow. Normal tire pressure distends the diaphragm spring to an upward convex attitude in contact with the underside of the translucent panel to project a visual indicator.

Abstract: Apparatus for inflating a tire connected to a tire rim and indicating the pressure of a tire while the tire is on the rim includes an elongated body element for connection with the tire rim, an elongated valve element having indicia thereon slidably disposed within an elongated passageway within the elongated body element, a seal attached to the elongated valve element, and a spring for biasing the elongated valve element against movement toward an extended position. The elongated valve element is moveable to a fully retracted position within the elongated body element and allows pressurized air to flow between the elongated body element and the elongated valve element when the apparatus is used to fill a tire.

Abstract: A control console for a gas die cylinder system which includes a plurality of gas die cylinders to which gas under pressure is provided wherein the control console comprises a body including an inlet for gas, a pressure chamber communicating with said inlet, a visual pressure gauge of the direct pressure type communicating with the chamber. An outlet extends from the chamber to the exterior of the body and a one way pressure control valve is provided between the outlet and the chamber and operable upon predetermined pressure in the outlet to modulate and maintain the pressure in the chamber at a predetermined pressure thereby minimizing oscillations and vibrations in the direct type pressure gauge.

Abstract: Pressure gauge for pumps, particularly hand pumps for bicycles, motorcycles or the like, including a cylinder sealingly connected between the outlet of the pump and the coupling for the valve of the tire; a piston is mounted inside the cylinder so that it can move in contrast with an elastic lamina and is connected to a rack which meshes with a rotatable sprocket with which a radial protrusion, provided with a pointer for indicating the pressure on a granduated scale, is rigidly associated.

Abstract: A dual pneumatic tire inflator is provided for simultaneously adding and equalizing the air pressure in dual tires commonly employed in tractor trailer trucks, airplanes, tractors and other dual wheeled vehicles. The dual pneumatic tire inflator includes a housing having an inlet valve for receiving pressurized air from a common air pressure source and a pair of pressure hoses connected to a pair of locking valve tire chucks for engaging each valve of the dual tire assembly and a pressure gauge for indicating the common pressure of the dual tires and a relief valve for adjusting and equalizing the air pressure in the dual tires. The housing is preferably of an elongated body having an inlet disposed at one end, a pressure gauge disposed at the other and the two pressure hoses and pressure relief valve disposed in a planar relationship.

Abstract: An apparatus including a body tube coaxially mounting an internally threaded lower cylindrical skirt at a lower terminal end thereof for securement to a valve member of a conventional automotive tire. An apertured cylindrical web is mounted adjacent an intersection of the tube and cylindrical skirt, including an axial rod fixedly mounted projecting coaxially of the skirt for projection and depressing of a central displacement needle seat, as utilized in automotive valves. A flexible web formed of memory retentent material is mounted adjacent an upper terminal end of the tube below a translucent viewing lens. The web includes a rigid boss member mounted thereon, whereupon proper inflation within an associated tire permits projection of the boss against the translucent lens for viewing of the boss' indica of proper inflation, whereupon deflation permitting the web to deflect and displace the boss relative to the lens provides visual indication of underinflated condition.

Abstract: A valve cap adapted to be screwed onto the tire valve of a pneumatic tire generates a wireless transmissible pressure drop indication signal. The valve cap comprises a valve cap housing comprising a pressure chamber and a reference chamber. The non-blockable pressure chamber is admittable with the tire pressure to be controlled. The reference chamber is admitted with a desired pressure whenever the valve cap is screwed onto the tire valve. A signal generating means including transmitter means, power supply means and switching means is provided within said valve cap housing. The switching means comprises a conductor section fixedly arranged within the pressure chamber in a short distance to a rest position of a deflectable diaphragm. Any tire pressure drop will converge the diaphragm into the pressure chamber and will complete an electrical circuit whereupon a transmitter circuitry is supplied with voltage/current, and the transmitter means generates a pressure drop indicating signal of limited duration.

Abstract: A tire valve comprises means for generating a wireless transmittable pressure drop indicating signal. The valve comprises a valve foot attachable to a tire rim and a valve shaft extending from said valve foot. A signal generating means is mounted on said valve foot at a valve foot side remote from said valve shaft. Said signal generating means comprises a reference pressure chamber which is admittable with a desired pressure. A diaphragm defines said reference pressure chamber and is admittable with the tire pressure to be controlled. Further, said signal generating means includes a transmitter means, a power supply means and switching means which is regularly hold in an opened position, but which is closed with a diaphragm deflection, whereupon the transmitter means is activated. The transmitter circuit comprises a sequence control which terminates a signal transmission after a short duration thereof and resets the transmitter means in a state to become activated again.

Abstract: A pressure indicating valve stem for a pneumatic tubeless tire comprises a tubular valve core holder (5), a mounting sleeve (4) in which the core holder is capable of elastically restrained telescopic movement, a clamp nut threaded on said sleeve which in conjunction with an end flange (9) on the sleeve secures it within the valve orifice of a wheel rim, and sealing means comprising an elastomeric generally tubular molding having an annular margin (14) clamped between the end flange and the rim and its other end margin sealed to the inner end of the core holder. The molding has a large diameter undulating walled boot or bellows (19) extending from one said end margin to the other, which provides all of the elastic restraint on the movement of the core holder within the sleeve.

Abstract: A tire valve incorporates a visual gauge, an element for setting different air pressures. The valve cannot overinflate, as the valve locks at a maximum pressure. Further, an indicator actuates when underinflated, and the valve is designed to keep pressure for an indefinite period.

Abstract: A manually-operated device for safely inflating automotive vehicle tires. A pressurized gas cylinder is connected to a manual valve for delivery of pressurized gas to a vehicle tire. The gas pressure is safely controlled (regulated) by a stepped piston that is slidably arranged in a vent chamber. A small diameter rod section of the piston is aligned with a valve seat in the main flow passage. Pressure rise on the large diameter section of the piston causes the rod section to temporarily interrupt the main gas flow. Gas is vented around the large diameter section of the piston to enable the rod section to move away from the associated valve seat, thereby permitting gas flow to resume through the main passage.

Abstract: This tire valve comprises a brass stem having an elongate insulating sleeve over it, the sleeve being circumposed by a flanged threaded metal body which is provided with a gasket and a clamping nut to clamp the valve to the wheel. Electrically insulated from each other are a pair of contact rings held respectively against the clamping nut on the body and a second final nut contacting the stem, the rings having take-off leads. A molded rubber shroud protects the rings and holds them and an insulating spacer in proper relation.

Abstract: A visual tire pressure indicator having a hollow outer body, an inner cap fitted within the outer body and an inner body secured to the inner cap and generally co-axial with the outer body. A pair of indicator sleeves is slidably disposed around the inner body. A pre-calibrated spring helically surrounds the inner body for biasing or urging the pair of indicator sleeves towards the inner cap. A valve core body is threadably engaged to top threads of the inner body while simultaneously being fitted snugly against an inner wall of the inner body. The valve core body has a longitudinal bore wherethrough air is passed to be emitted into a tire. A control rod has a valve core cap secured thereto and is slidably disposed in the longitudinal bore such that when it is depressed, air can be passed through the longitudinal bore. A valve core spring is positioned around the control rod and in the longitudinal bore to bias the control rod such that the core cap can seal-off the longitudinal bore.

Abstract: A tire valve with a tire air pressure indicator incorporated therein to provide a continuous visual indication of the air pressure within the tire. The tire valve includes a rigid tubular main stem having means on its inner end for mounting on a tire rim together with an external sleeve spaced from and sealingly engaged with the main stem to form an air chamber. A spring biased piston is slidably disposed in the air chamber for movement longitudinally therein with air passages communicating the interior of the stem with the air chamber with the air pressure in the tire also occurring in the air chamber thereby moving the piston outwardly by compressing a calibrated spring in accordance with the air pressure. The external sleeve is transparent and the piston serves as an indicator associated with a graduated scale on the sleeve to indicate the air pressure in the tire.

Abstract: A valve for checking tire pressure comprising a hollow cylinder, a sealing block, a plate, a spring and a flute. The hollow cylinder has a flange inwardly extending at intermediate portion thereof to form an opening and divide the hollow cylinder into upper and lower portions. The sealing block is disposed in the lower portion of the hollow cylinder and contacts with the flange to seal the opening. The sealing block is provided with a passage communicating both sides of the sealing block. The plate has a pin downwardly extending into the opening and contacting the sealing block and a seat formed on upper surface of the plate. The spring is disposed on the seat of the plate. The flute mounted on the hollow cylinder includes a base and a flute body disposed on the base. A passage is formed in the base which communicates the flute body with the upper portion of the cylinder.

Abstract: An air pressure control system for verifying and adjusting air pressure, simultaneously, in a pair of vehicle tires, either the pair of front tires or the pair of rear tires or any individual tire. The system comprises a pair of air conduits having tire valve connectors at a free end thereof for connecting the conduits to respective one of a pair of vehicle tires. The conduits are interconnected together at a junction to equilibrate air pressure in the pair of tires. An air pressure source is also provided. A valve connects the air pressure source to the junction, in an inflating mode, to inflate the tires. Another valve also connects the junction to outside atmosphere, in a deflating mode, to evacuate air from the tires. A pressure sensor is connected in association with the valves and the junction to display the air pressure equilibrated between the pair of tires. A display device visually indicates the equilibrated pressure at the junction to determine if the valves should be actuated and in which mode.

Abstract: A refrigerant system gas pressure check gauge with a valve head opening having a valve pin and shaped to fit on and over the low pressure suction side valve fitting of a refrigeration system, auto or home, with colored zones and safety markings with worded indications including safety danger warnings. The colored zones and safety markings directly match precise pressure zones on the valve stem.

Abstract: A valve cap adapted to be screwed onto the valve of a pneumatic tire gives a pressure drop indication. To this end the valve cap comprises a deflectable diaphragm which separates the housing interior into a first chamber adjacent a transparent section of the closed housing end portion and a second chamber which is in communication with the tire interior through a port formed in a transverse housing wall and through the open tire valve. When the valve cap has been tightly screwed onto the tire valve and the tire valve has been opened, the desired tire pressure will be built up in both chambers. Upon closing of the second chamber a reference pressure corresponding to the desired tire pressure will prevail therein. Any reduction of the tire pressure relative to the reference pressure will cause the diaphragm to converge towards the transparent housing portion, thus serving as an indication.

Abstract: A portable air pump assembly and detachable safety lamp, includes an air compressor; an air supply line supplying pressurized air from the air compressor to a tire; an electrical supply line supplying current to the air compressor; electrical contacts which connect the electrical supply line to the air compressor only when they are in a closed condition; a by-pass air supply line having one end with the air compressor; a pressure limit switch connected with the opposite end of the by-pass air supply line for automatically causing termination of the current supply to the air compressor in response to back pressure from the tire when the tire has been inflated to a desired air pressure; and a safety lamp detachably connected with the housing for providing a warning light and operable in a connected or detached position.

Abstract: A tire pressure warning device is disclosed which comprises a body adapted to be threaded into the valve stem of the tire, a pressure sensing valve in the body and an elastomeric compression spring acting on the sensing valve to open it when the pressure in the tire is below a predetermined value. In one embodiment an alarm in the body is adapted to produce an audible signal in response to air flow through the sensing valve. In another embodiment the body includes a distendable diaphragm as a pressure sensor and an elastomeric compression spring for closing a switch when the air pressure is below a predetermined value. A radio transmitter in the body transmits a warning signal when the switch is closed. A monitor detects a transmitted audio or radio signal and compares it with a stored reference signal and produces an output signal only when the transmitted signal corresponds to the stored signal.

Abstract: An apparatus for maintaining a spare tire in the trunk of a vehicle fully inflated. A conventional spare tire has a metal wheel with a rubber inflatable tire attached thereto and a valve stem extending out of the bottom on one side thereof. An extension tube sealingly attached at one end thereof to one end of the valve stem on one side of the wheel extends to the other side of the wheel through a rubber washer disposed in one of the lug holes. A one-way valve stem is disposed in the other end of the extension tube for permitting inflation of the tire through the extension tube. A pressure gauge is connected to the extension tube adjacent to the one-way valve for constantly showing the air pressure inside of the tire.

Abstract: An improved pneumatic pressure gauge used in inflating a pneumatic tire comprises an adapter means having a gas passage extending from a gas inlet end to a gas outlet end, and a gauge casing connected integrally to the adapter member. The gauge casing includes a gauge chamber, an opening intercommunicating the gas passage and the gauge chamber, a control chamber communicated with the gauge chamber, and a gas release passage opened to atmosphere and communicated with the control chamber. A first valve means is disposed to close the communication between the gas passage and the gauge chamber, and a second pressure responsive valve means is disposed in the control chamber to close the communication between the control chamber and the gas release passage. The valve means are opened when the pressure in the tire or the gas passage exceeds the predetermined pressure.

Abstract: A vapor delivery pressure test adapter for integral installation at the outlet of a vapor delivery pressure regulator within a self-contained vapor delivery system, comprising a vapor pipe nipple compatible with such system, with vapor filter means internally and fixedly mounted within the nipple, and delivery pressure test adapter means externally and piercingly mounted to the nipple to permit intermittent external measurement of vapor delivery pressure within the system.

Abstract: An overfill valve having a saddle-shaped, flapper valve element located within an inlet pipe and a mating valve seat disposed about the inner wall of the pipe. A spring couples a weighted float to the valve element and extends generally outward from the pipe. The float moves the valve element from a normally open position to a closed position as the float is raised. A controlled drain aperture through the valve element permits standing fluid within the pipe to drain. The spring allows the float to be moved to permit the pipe to be slid down a storage tank casing. A triggering mechanism is coupled to the float and valve element so that the float shifts a triggering element into the liquid flow through the valve, and the force of liquid flow against the triggering element forces the valve element toward the closed position.

Abstract: An air inflator includes a double-cylinder body having a first cylinder having its one end connected with a compressed air adapter for supplying a compressed air therein and having its another end connected with an air filling applicator adapted to connect with a tire valve for filling compressed air into the tire, and a second cylinder fluidically communicated with the first cylinder and mounted with a pressure gauge thereon. The first cylinder is formed with an actuating rod reciprocatively moved in the first cylinder for controlling the air flow for filling a tire, or for sensing a pressure gauge for measuring air pressure, or for releasing excess air upon the adjustable depression of a handle pivotedly mounted on the body.

Abstract: The device for indication of low pressure in tire inflation includes a hose which can be connected to the valve stem of the tire for communicating with the compressed air therein. A body is connected to and is in communication with the interior of the hose for receiving compressed air therefrom. An indicator is pivotably attached to the body remote from the hose. An actuating mechanism is disposed in the body and is responsive to the pressure of the compressed air for selectively holding the indicator in a first position during normal operation, and releasing the indicator, upon a drop in the pressure of the compressed air below a predetermined level, to allow the indicator to pivot and assume a second, low-pressure position. A spring is provided for effecting the pivotal movement of the indicator to the second, low-pressure position upon release of the indicator by the actuating mechanism.

Abstract: An adjustable automatically controlled pneumatic pump device includes an air pump, an electric motor adapted for being energized by a power source to drive the air pump, an air hose member with an exhaust port at one end, and an other end of the hose member connected to the air pump, a pressure gauge with a pressure setting pointer which can be adjusted in advance according to the predetermined air pressure desired and a pressure indicating pointer which is capable of contacting with the pressure setting pointer when the air pressure through the air hose reaches the predetermined air pressure, and an electric logic circuit device which is electrically associated with the motor and the pressure gauge and arranged in that the electric logic circuit can control the motor for pumping air into an enclosed space.

Abstract: The disclosure describes a valve cap which indicates the pressure within a pneumatic tire.

Abstract: A low tire pressure warning device is described which comprises: (a) a housing having an elongated chamber therein which has a non-detachably mounted closure thereon, a first end of which is capable of communication with the interior of a tire and a second and opposite end thereof capable of communication with the exterior of said tire; (b) a spring-loaded piston mounted within said chamber, functionally connected so as to be axially movable within said chamber in response to changes in tire pressure, and so as to motivate a streamer upon movement of said piston in response to a predetermined tire pressure decrease; and, (c) a spring-mounted, colored warning streamer located within said second end of said chamber and capable of being mounted in a compacted fashion therein, said streamer being connectively related to said spring-loaded piston and capable of being spring motivated to stream out of said chamber, as a warning signal, in response to axial piston movement in response to a predetermined tire pressur

Abstract: An overfill valve having a saddle-shaped, flapper valve element located within an inlet pipe and a mating valve seat disposed about the inner wall of the pipe. A spring couples a weighted float to the valve element and extends generally outward from the pipe. The float moves the valve element from a normally open position to a closed position as the float is raised. A controlled drain aperture through the valve element permits standing fluid within the pipe to drain. The spring allows the float to be moved to permit the pipe to be slid down a storage tank casing. A triggering mechanism is coupled to the float and valve element so that the float shifts a triggering element into the liquid flow through the valve, and the force of liquid flow against the triggering element forces the valve element toward the closed position.