Abstract: A ball valve with an emergency sealing device has a ball having a through hole rotatably mounted within a valve body; ball seat retainers are positioned between the valve body and the ball; ball seats, made of a heat destructible material are mounted on the ball seat retainers and brought into sealing contact with the ball surface, one each to the ball seat retainers; first sealing rings, made of a heat destructible material for functioning under normal conditions are mounted one each on portions of the ball seat retainers where they contact the valve body; annular projection surfaces are provided on each ball seat retainer on parts of the outer circumferences of the ball seat retainers; second sealing rings, made of a heat resistant, flexible material for functioning in case of emergency, are mounted one each on portions of the annular projection surfaces of the ball seat retainers where they contact the inner circumference of the valve body and have pressing mechanisms engaging them, the diameter of the sec

Abstract: A safety valve designed for relieving pressure in a mine support jack. A washer and check valve are positioned in a counterbore located on the front surface of a resilient gasket member. A leg extends from the rear surface of the resilient gasket and extends through a rear chamber to support the check valve in a position sealing the outlet port. The rear chamber is filled with pressurized gas to form a gas cushion. The end of the leg is positioned to seal an inflation orifice.

Abstract: Flexible check-valve-like baffle is provided in low pressure indicator to assure proper seating of poppet and maximum flow during fill.

Abstract: A closure-assisted valve includes a cartridge insertable into, and removable from, the remainder of the valve structure. The cartridge includes a displaceable piston having an elastomeric sealing member at one end engageable with a flat-surfaced valve seat. At the other end, the piston includes a drive surface against which a rotatable drive member is engaged. In a preferred embodiment, certain relatively movable portions of the cartridge include a cam surface and a cam follower. The cam surface is contoured such that the piston is advanced toward a valve closed position upon rotation of the drive member, but the last portion of piston travel prior to valve closure is only under the influence of gravity and fluid forces. In order to bias the piston toward a valve closed piston, entering fluid is directed around the piston so as to aspirate the piston toward a closed position.

Abstract: This new plug type faucet valve assembly of the present invention particularly adapted for use in plumbing fixtures, for dispensing and, or mixing hot or cold water into lavatory sinks, vessel and the like, herein being disclosed. The preferred embodiment comprises a generally cylindrical body, having a vertical inlet port eccentrically placed from the bottom extending upward into a central cavity, and a horizontal discharge port through the side wall, wherein said ports are being interconnected at a right angle, by two intersecting blind bores in a cylindrical plug rotatably disposed therein to form a passageway through the faucet valve. Said plug comprise seals circumferentially disposed in respective grooves thereon, and having a trust bearing plate sealably co-acting with the inlet port seal at the bottom of said cavity, to protectively separate the planar surfaces of said plug and said cavity, forming a leak-proof connection therebetween.

Abstract: A rupturable pressure relief assembly of small unitary construction is provided comprised of a hollow housing which includes an annular supporting shoulder within the interior thereof, a circular rupture disk positioned within the housing on the annular supporting shoulder and an annular supporting member positioned within the housing which coacts with the annular supporting shoulder to clamp the rupture disk therebetween. A protruding annulet means is provided for contacting and biting into the rupture disk whereby it will not be moved by fluid pressure and a deformable annular spring means is positioned on the opposite side of the annular supporting member from the rupture disk whereby when the outlet end of the housing is folded over the deformable annular spring means, the rupture disk is rigidly clamped between the housing and the supporting member with the protruding annulet means biting into the rupture disk.

Abstract: A pressure-limiting valve for hydraulic fluids comprises a stepped switching piston which is loaded by a closing spring to oppose high fluid pressure obtaining in an inflow duct of the valve. Radial transverse bores branch from an axially-extending bore in the switching piston. When the setting pressure established by the closing spring is exceeded, the transverse bores in the piston move past an O-ring seal as the piston compresses the spring, and pressure fluid thus flows from the axially-extending bore into a discharge duct of the valve. The stepped switching piston is guided in a pressure chamber by a portion of its cross-section which is greater than that in the zone of the O-ring seal. Adjacent the inflow duct, the axially-extending bore in the piston has a reduced flow cross-section. Further radial bores lead from the axially-extending bore in the piston in the region of the stepped portion of the latter.

Abstract: This disclosure sets forth a variable tensioning system for use in a valve featuring shear seals. In the preferred and illustrated embodiment, a spring system provides loading on the valve element to force that element into engagement with a valve seat. A sliding sealing surface is accomplished in this contact. The valve element may be a tapered plug, a sphere or a flat face or plate. Typically, it is a hard member working against a seat supporting a seal surface featuring a sliding shear seal. A specific minimum load is applied to the valve element to accomplish sealing against minimum pressure. The present apparatus incorporates a closed chamber enclosing a slideable piston. The piston has a specific cross-sectional area exposed to fluid pressure of the fluid being controlled by the valve. The piston applies pressure dependent force against the valve element.

Abstract: The housing (5, 6) of the regulator contains a medium-pressure chamber (10) to which gas is supplied from the cylinder when a self-closing cylinder valve (2) is open and which communicates with the regulator outlet (14) through a further valve (b 13), and a low-pressure chamber (23) in open communication with the outlet. The medium-pressure chamber (10) has a diaphragm wall (15) with a spindle (16) for controlling the cylinder valve (2). The low-pressure chamber (23) has a diaphragm wall (22) for controlling the further valve (13) through a connecting rod (20) carried by the diaphragm wall and coacting at its upper end with a manual selector (21) and at its lower end with the valve opener spindle (16). By means of the selector the connecting rod may be locked in a raised position in which the cylinder valve (2) is closed.

Abstract: A rupture disk assembly is provided which after rupture and pressurized fluid relief, recloses itself to prevent backflow therethrough. The assembly is comprised of a hollow rupture disk support member having a pressurized fluid inlet opening at one end and at least one pressurized fluid discharge port at the other end. A rupture disk is sealingly attached to the support member whereby until the rupture thereof, pressurized fluid is prevented from flowing through the support member to the discharge port therein.

Abstract: A rotor valve has a set of sealing members or inserts positioned in longitudinal channels formed on the outer surface of a cylindrical rotor. A resilient O-ring snuggly engaged in a groove in the rear surface of each insert urges it against a surrounding rotor chamber formed in a valve body. Due to the resilience of the O-ring, the fluid seal between the rotor and the rotor chamber does not bind due to contaminants or extreme variations in temperature. The sealing inserts are formed of a deformable material. Fluid pressure acting on the inserts deforms them to produce a lateral squeezing force on the O-ring. The interaction between the inserts and the O-ring enhances the integrity of both the seal between the inserts and the surrounding rotor chamber and the seal established by the O-ring itself between the rotor and the insert.

Abstract: An improved ball valve is disclosed, which is particularly adapted for use with pipelines of large diameter, possibly of the kind intended to convey toxic or dangerous fluids and for which a virtually perfect seal is required, said valve having a control mechanism which comprises sequentially acting linkages and preloaded resilient means in order that the valve shutter is always in an accurate central position as to its axis of rotation and the approach of the shutter to the seat takes place only once that the rotation of 90.degree. has been completed, in order that a uniform and intense pressural action of the shutter on the seat may be obtained. Alternative embodiments within the scope of the invention are shown and described.

Abstract: The valve comprises a two-piece housing consisting of a body and a flat cover. The body is milled out to define a working chamber. A port extends through the body wall to communicate with the chamber; a second port extends through the cover wall. The two ports are aligned at one side of the chamber, so that the remainder of the chamber provides a storage cavity. A gate valve comprising a stem and gate is wholly contained within the chamber. The base of the stem is pivotally connected on a shaft journalled in the housing, so that the gate may be rotated or swung along an arc from the storage cavity to a blocking position across the ports. Disengageable means are provided to normally lock the gate valve in the stored position. Means are also provided to bias the gate valve to the blocking position when the locking means are disengaged. The assembly is flat and compact and is particularly adapted to fit in the crowded confines of an engine.

Abstract: Disclosed is a seal for a rotary hydraulic valve having an inner surface which is concave and spaced from the recess in the rotary core in which it is received. Two parallel troughs are formed in the inner surface between the edges thereof and the central flow passageway. In use, fluid under pressure enters the trough and distorts the seal both radially outwardly against the valve body and circumferentially outwardly against the sides of the seal recess.

Abstract: A fluid pressure regulator for adjusting the pressure of fluid passing through a pipe is provided for use with irrigation sprinklers or the like. The pressure regulator has a housing having a passageway therethrough, which has a throttling stem slidably mounted in the housing passageway and having a passageway therethrough. A compression spring is mounted between the throttling stem and the housing to bias the throttling stem relative to the housing. A throttling stem seat is attached in the passageway through the housing and has a passageway therethrough and has the end of a throttling member extending thereinto for adjusting the passageway through the throttling member seat so that fluid pressure is adjusted between the input and output of the fluid pressure regulator.

Abstract: A pressure regulator is disclosed which includes a valve housing with a sliding piston member defining inlet and outlet chambers. A valve seat in conjunction with the piston member forms a valve controlling fluid passing from the inlet to the outlet chamber. The piston member includes a piston and piston plate, the piston plate engaging the valve seat to control fluid flow. The diameters of the chambers and the piston are selected so that the inlet pressure causes no net force on the moving piston member, and does not contribute to either the opening or closing of the valve. On the outlet side, the piston plate is sealed with respect to the valve seat at a diameter which is less than that of the piston plate, such that the outlet pressure creates a net force urging the piston plate to engage the valve seat. The resulting unbalanced output force on the member is opposed by coil spring urging the member upward to unseat the plate from the valve seat.

Abstract: A high pressure shut-off valve has a hollow valve body with an open end, closed end and a cylindrical cavity with a cover. Aligned inlet and outlet portions form a straight bore intersecting the valve cavity. A plug valve assembly has a supporting mandrel reciprocally slidable to a position abutting the valve cavity closed end, with an end portion having a transverse valve passage and an intermediate portion for closing the valve body bore, the valve passage being aligned with the bore when retracted. An elastomeric sealing sleeve member on the mandrel seals the cavity wall around the bore when the valve is closed. A mon-rising threaded stem, operated by a hand wheel, moves the valve assembly and has a lost motion connection operable on overtravel to compress the sleeve member longitudinally along the mandrel. Metal discs supported integrally on a supporting sleeve fill holes in the sleeve member to prevent extrusion of the sleeve into the bore.

Abstract: A four-wheel drive system has a center differential between front and rear wheels, and differential restraining or locking means for restraining or locking the center differential. The four-wheel drive system is equipped with an automatic control system for automatically locking the center differential in accordance with the deceleration of the vehicle. The control system may have means for determining a coefficient of friction between the tire and road surface in order to lock the center differential at a low vehicle deceleration when the sensed coefficient of friction is low.

Abstract: A tire valve assembly which is adapted to be mounted on the rim for a tubeless tire, and wherein the tire valve assembly is constructed of a non-metallic material. The tubeless tire valve assembly includes a valve stem which is constituted of a plastic material, for example, such as nylon or fiber-reinforced nylon, or a plastic material possessing similar physical properties, which has a flange integrally formed therewith at one end of the valve stem, and which is encompassed by a rubber grommet towards that stem end, and which is adhesively bonded to the valve stem and adapted to be sealingly mounted within an aperture formed in a tire rim for a tubeless tire.

Abstract: A shutoff valve for the downspouts of fuel trucks or tankers, the shutoff valve being installed at the inlet of a downspout and serving to seal off the inlet of the downspout until such time as overflow fuel or other liquids can be safely drained off from an overflow liquid well provided at the top of the tank. The valve includes manually actuatable means for opening the valve and also includes means for automatically closing the valve in the event of a fire.