Abstract: A pop-off valve (92) having a significantly improved pressure-flow characteristic and resistance to vibration or "honking." The valve includes a poppet (154) having a flat bottom end wall exposed to pressure and a peripheral lip with a frusto-conical surface (158) for engagement with a valve seat 140. A vent-hole (196) in the poppet further enhances the vibration characteristics of the valve, and a dampening chamber (186) downstream of the poppet dampens any remaining vibrations.

Abstract: A fuel injection apparatus is proposed for internal combustion engines with distributor and apportionment valves, which serves to apportion a quantity of fuel proportional to the induced air quantity. The distributor and apportionment valves of the fuel injection apparatus comprise a slide valve which is displaceable opposite a slotted bushing fixed in the valve housing and equipped with slots, in order to effect the variation of the current flow area of the apportionment valves. A control sleeve is interposed between the slotted bushing and the control slide and includes a portion which partially covers the control slots in the bushing to provide for fine control of the control slots in the bushing.

Abstract: A pilot operated relief valve for use on medium and high pressure vessels, conduits, and the like.A unique two-stage, non-flowing pilot valve (5) operates a main relief valve (7) of substantially greater capacity. Flow control elements provided by 35, 36, 38, and 39 associated with the first stage poppet are utilized to provide positive valve operation. In a preferred embodiment the main valve is mounted directly onto the pressure vessel which is to be vented at a predetermined pressure. The pilot is preferably mounted closely adjacent to the main valve for operating communication therewith. A ball (16) selector, (24, 15, 76) provides means for conveniently connecting to a field testing either the pilot or the entire valve, providing improved setpoint and reset or blowdown adjustments for the overall combination.

Abstract: A high lift check valve resistant to the flow of abrasive containing fluid therethrough, which valve may be transformed to also act as an excess fluid control valve.

Abstract: A differential-pressure valve is described including a valve passageway formed through a fixed wall and closable by a valve member displaceable by a differential-pressure sensor biassed to close the valve passageway and subjected to the differential pressure such that the higher pressure tends to open the valve passageway and the lower pressure tends to close the valve passageway.

Abstract: A manufacturing method of the valve disk of spring loaded safety valves comprising, making its bottom portion as the pressure receiving surface, a cup-shaped center portion having an annular protrusion slightly inwardly from the peripheral edge of its bottom and a cylinder provided with an inwardly extending annular flange (valve lip) formed through bending its lower end, which is formed by continuous metal fibers, and contacting those two parts. More particularly, securing tight contact between the stage portions provided at least with one step beforehand around the outer periphery of said center portion and the inner periphery of said cylinder respectively when both are set in and, at the same time, maintaining an extremely narrow and uniform space between said annular protrusion and annular flange. Welding the contacting surfaces of said center portion and cylinder at a stretch by electronic beam.

Abstract: A fluid pressure relief valve provides automatic venting of a high pressure source to an area of lower pressure in response to pressure build-up of the source. The valve includes a valve body in which a recess is provided, a passage providing communication between one end of the recess and the source. A poppet is oriented for movement with respect to the recess and includes a sealing element adapted to close the other end of the recess by sealing engagement with the valve body. A spring urges the poppet toward sealing engagement. The poppet has ports proximate the sealing element which are covered when the sealing engagement is maintained but are uncovered progressively with movement of the poppet out of sealing engagement. If the source pressure exceeds a predetermined threshold level, the poppet is driven increasingly away from the sealing engagement with increase in pressure of the source for progressively uncovering the ports in response to dynamic impact upon the poppet by fluid flow through the valve.

Abstract: A pressure relief system for an internal combustion engine compression relief engine brake is disclosed. The pressure relief system comprises a bi-stable ball relief valve associated with the high pressure hydraulic system together with damping means adapted to damp out rapidly the oscillations of the ball valve during the period of its opening so as to maximize the flow of hydraulic fluid through the bi-stable valve and minimize the time required to relieve the pressure in the high pressure hydraulic system of the compression relief engine brake. The damping means comprises a spring controlled ball valve guide which inhibits premature reseating of the bi-stable ball valve and maximizes the average opening of the valve during its operating period.

Abstract: A pressure relief valve (10) including a valve stem (34) having an elastomeric valve element (36) received in a counterbore (38) formed in one end thereof and engageable with a valve seat (32) formed in the body (12) of the valve. An annular channel (58) is formed in the valve body surrounding the valve seat, and the valve element is recessed below the outer edge of the counterbored end of the valve stem, such that a thin, annular wall section (39) defined by the difference between the diameter of the counterbore and the outer diameter (40) of the valve stem, extends downward into the annular channel when the valve is closed.The outer diameter of the counterbored end of the valve stem is substantially smaller than the inner diameter (22) of the main valve chamber to define an annular fluid escape passage (64) and a lip is formed on the valve stem above the counterbored end to guide the valve stem in the main valve chamber.

Abstract: A relief valve is provided with slots across the end of the valve stem where contact is made with the valve body to eliminate gas pressurization in the annular area bounded by circumferential contact between the valve stem and the body and a smaller diameter circumferential contact between valve seat/seal members. This construction prevents any leakage gas from becoming trapped between the valve stem and the container which would lower the design cracking pressure thereby adversely affecting the operation of the relief valve.

Abstract: A backflow prevention device is disclosed which includes a pressure differential relief valve. The relief valve includes a lift chamber functioning to accelerate opening of the valve to assure that the valve fully opens once it has partially opened. The relief valve also includes construction features which allow control of the opening timing of the valve and which cause added closing force to be applied on the valve member to provide more positive closure thereof. Furthermore, a member is provided which substantially eliminates transfer of torque from a spring in the relief valve to a diaphragm therein and substantially eliminates angular cocking of the moveable valve assembly also in the relief valve.

Abstract: A diverter tub spout for use in a bathtub installation including a shower head interconnected to a common source of water. A floating valve member is positioned within the spout water passage and is responsive to water pressure to abut a valve seat to close the passage. A valve control member capable of holding the valve member remote from the seat to permit water flow is held in the flow position by a manually operable stem in a manner that positively allows water flow regardless of the magnitude of water pressure. The stem easily may be positioned to allow the floating valve to close, diverting water from the spout to the shower head, but upon the water pressure dropping below a predetermined level, the tub spout parts will automatically return to their flow positions.

Abstract: A secondary air control system for an internal combustion engine having an exhaust system provided with exhaust gas treating means adapted for secondary air injection and including a relief valve includes a mechanism which keeps the relief valve open after the valve is opened by a predetermined pump discharge pressure, until a predetermined lower pressure is reached.

Abstract: A pressure relief valve for instantaneously relieving high pressure from a chamber wherein the relief valve pressure area for exhaust is greater than the initiating pressure area and having a flow relief area that is smaller than the area gauging the pressure which initiates the relief action.

Abstract: A series of valves with tapered-conical seats including valves such as safety relief or self-regulating in-line check valves which operate without springs but by the use of self-holding tapers which firmly stay in place when seated, the angle of the taper varying between 0.5.degree. to 45.degree., depending on the kind of material chosen and the valve type, TEFLON requiring a smaller angle for the same pressure holding capacity as conventional materials or other plastics, offering also valve design variations which include novel relief valves with springs and with self-relieving tapers, as well as shutoff valves with self-holding and self-relieving tapers operated by solenoids directly, and piloted valves, the valve series with conical seats, and improved sealing characteristics reduces dribble range while reference load is self-holding taper or a spring, and allows for reusable valves to replace safety rapture discs in some applications.

Abstract: A pressure relief valve for hydraulic mine supporting elements, particularly mine props, has a valve member loaded in its closing direction by a spring, a piston is connected to the valve member end sealingly sliding within a cylinder of the valve housing and arranged to be acted upon in closing direction by the pressure prevailing within the space before the seat of the valve member. The valve member has a neck portion of reduced diameter between the valve seat and the piston and the annular cross section, being acted upon in closing direction, between the neck portion and the circumference of the piston is smaller than the annular cross section, being acted upon in opening direction, between the neck portion and the valve seat.

Abstract: A valve for controlling the pressure within a tank to prevent excessive above or below atmospheric pressure conditions, including a pressure responsive valve and a vacuum responsive valve, wherein each valve includes a pallet with seals and blowdown rings of polytetrafluorethylene material, which is commercially marketed under the trademark Teflon. The pressure pallet includes guide means having Teflon parts, while the vacuum responsive valve includes hinge means having coacting Teflon parts. The breather valve includes structure defining a vertically extending vent structure having an opening arranged alongside the tank in which the valve is mounted, which opening is positioned to avoid being sealed by any normal buildup of ice and snow.

Abstract: A valve for water pipes comprises a housing with an inlet opening and an outlet opening with a through-flow chamber arranged between both these openings, in which a spring loaded valve spindle provided with a sealing means is arranged to work in a direction to and from an engagement surface intended for the valve spindle sealing means in the chamber, for regulating the flow through the chamber in a direction from the one opening to the other.

Abstract: The disclosure illustrates an anti-tampering fuel control valve for a fuel system providing fuel at a regulated pressure to a series of unit injectors on a diesel engine. The injectors are cam actuated to inject fuel quantities related to the pressure of the fuel supplied to them. The control valve bypasses fuel from the output of the fuel system to a low pressure region when the pressure exceeds a first given level because of fuel system tampering. Orifices in the bypass flow path cause the fuel pressure to follow a schedule generally similar to the normal system pressure schedule but at lower levels. Bypass flow is continued until the fuel system pressure drops to a lower pressure than the pressure at which bypass flow begins.

Abstract: An improved pressure relief valve for tubeless tires or the like is provided. The pressure relief valve includes a novel poppet valve dust cover structure which will automatically reposition the dust cover after each opening or cycle of the relief valve and which will allow the dust cover to act as a secondary poppet valve surface during venting of the pressurized container in which the valve is mounted to increase the rate of fluid flow through the valve. The valve is designed to be sealingly mounted in an aperture in a wall of the pressurized container and may be mounted therein by means of a threaded connection, a clamp connection, a snap-in connection from the interior of the container or a push-in connection from the exterior of the container. The dust cover is attached to the main poppet valve member for axial movement therewith.

Abstract: Hydraulic control valve arrangement for controlling the amount of pressure fluid flowing to a consumer, in which the valve member of a first valve, which selectively controls flow of pressure fluid to at least one consumer or from the latter to a return passage, forms a variable throttle between the pressure fluid inlet passage and a consumer passage connected to the consumer, in which the throttle causes a pressure difference, and in which the pressure difference may be maintained substantially constant by a bypass passage between the inlet passage and the return passage in which a second valve member is arranged which is biased by a spring to a closed position and by the pressure difference produced by the variable throttle to an open position.

Abstract: Safety device for a compressed gas tank comprising a membrane influenced by an elastic effort and resting simultaneously on two concentric seats. It is characterized in that the applying of the pressure to the seat having the smallest diameter corresponds to a sealing position and that the applying of the pressure to the seat having the greatest diameter causes a sudden opening of the device.

Abstract: A fuel supply line for an automobile engine extends from a fuel tank to a carburetor and contains an engine driven fuel pump and a poppet type flow check or roll-over valve downstream of the pump, which valve is normally held open by comparatively low pump pressure. If the engine stalls, as for example in the event of a collision or automobile roll-over, the pump will stop operating and the valve will be positively closed by a spring to prevent fuel leaking from the tank. The valve will not re-open until subjected to comparatively high pump pressure upon restarting of the engine.

Abstract: A highly responsive valve for exhausting high pressure combustion gases from a closed combustion chamber upon the occurrence of a predetermined pressure is disclosed. A valve housing defines a cylindrical pressure chamber adapted for connection to a combustion chamber. A cylindrical valve sleeve is reciprocably guided along the chamber interior wall from a first position blocking directionally oriented outlet ports in the chamber to a second position opening the outlet ports to rapidly discharge combustion gases from the pressure chamber. The lower edge of the sleeve seats against a cover plate in the first position and defines an annular pressure chamber with the grooved seat. A pilot valve houses a reciprocable piston which controls communication between the pressure chamber and the valve chamber.

Abstract: A diaphragm valve which may serve as an equal pressure valve or as a pressure equalizing valve of a fuel metering and distributing unit for an externally ignited internal combustion engine. The valve has a flexible diaphragm having a clamped diameter and to which a valve plate is connected. The valve plate operatively cooperates with a valve seat of the valve and has a diameter which is as large as possible in relation to the clamped diameter of the diaphragm. The valve also includes a stationary thrust plate which is concentrically disposed relative to the valve seat, which defines a knife-shaped edge which lies in a common plane with the valve seat and which operatively cooperates with the valve plate. The knife-shaped edge has a diameter which is as large as possible in relation to the diameter of the valve plate.

Abstract: An improvement in an inflator valve, pressure gauge, and automatic pressure-responsive relief valve, all of which are combined into an integral hand-held and operated device for use in high pressure inflating applications.

Abstract: A flow responsive poppet relief valve includes a housing having an outlet chamber and an inlet passage opening thereon to define an annular valve seat therebetween, a spool disposed for axial movement in the housing and having a head with a conical nose portion thereon, a spring disposed intermediate the housing and the spool for biasing the conical nose portion axially closably against the valve seat and whereby the spool is axially openly moved away therefrom by a fluid in the inlet passage at a predetermined pressure, and an outwardly flared surface portion on the head for assuring that upon opening movement of the spool a relatively thin fluid stream is guided by the conical nose portion in axially relatively low force-transmitting impinging relation glancingly against the flared surface portion, and upon further opening movement of the spool a relatively thicker fluid stream is guided by the conical nose portion in axially relatively greater force-transmitting impinging relation against the flared surfac