Abstract: A flexible valve retainer for a piston and suction valve assembly of a reciprocating piston hermetic compressor assembly. In the compressor assembly, the suction valve opens as a result of the fluid pressure generated by the reciprocating movement of the piston in the cylinder. As it opens, the suction valve is axially displaced from a closed position on the top surface of the piston to an open position a fixed distance therefrom, whereupon further axial movement is prevented as the suction valve strikes the valve retainer. The radially outer portion of the valve retainer deflects as a result of the impact with the suction valve. This deflection of the valve retainer lessens the detrimental effects caused by repeated impact between the suction valve and retainer. The valve retainer is formed from a flexible material such as spring steel or Swedish steel. The valve retainer comprises at least one washer coaxial with the suction valve, and spaced said fixed distance therefrom.

Abstract: A pressure difference relief valve, viz. a pressure relief valve or a vacuum relief valve, for a liquid container has a valve body which opens or closes a valve opening of a valve housing in response to the pressure difference between the interior of the valve housing and the ambient atmosphere. The valve body is connected to a slidably mounted stem. The valve is constructed with spring elements which are clamped against the stem from opposite sides thereof at a controlled force to create a frictional resistance to sliding movement of the stem. Hereby any tendency of the valve to vacillate between the closed position and a fully open position under the influence of fluctuations of the gas or air flow, e.g. caused by turbulence, is eliminated or reduced.

Abstract: A drop compensated pressure regulator includes a spring casing, housing a regulator spring and a relief spring, a lower casing and a diaphragm sandwiched between the two casings. The lower casing has inlet and outlet ports. A one piece cam stem and relief seat is mounted for movement with the diaphragm and includes a cam surface that engages a movable disk holder. The disk holder is movable in a straight line within an orifice tube that supports a valve seat. A cylindrical lower spring seat is coupled by an O ring to the inner wall of the spring casing to dampen vibrations. The cam stem has built in stops to retain it within the orifice tube.

Abstract: A damper/isolator device having four ring segments (38) which are retained in slots (36) in an upper guide (31). The four segments (38) are forced radially outward against a valve bonnet liner (30) and are retained and centered within the slot (36) by serpentine or buggy type springs (44). The natural frequency of the damper and spring system is designed to be significantly higher than the frequency of the applied vibration induced by steam flow across a valve seat. This provides for the isolation of the valve plug (13) from the liner (30) and bonnet bore (11). The surface interaction between the ring segments (38) and the upper guide (31) provides for added friction damping to the system.

Abstract: A pressure regulator includes a hermetically sealed housing that limits the potential for leak paths to atmosphere or exterior to the housing. The regulator includes a dampening arrangement for limiting oscillations during high flow rates. A stem clip secures a poppet assembly to a movable member of the regulator. The stem clip permits radial movement of the poppet assembly to facilitate centering of the poppet assembly relative to a valve seat. The poppet assembly includes a self-tapping poppet to precisely set the opening between the poppet and valve seat irrespective of tolerance stackup.

Abstract: An anti-fluttering valve construction includes a valve member with integral stem received in an oversize cylindrical bore in a guide which can give rise to fluttering of the valve member when it is unseated. To avoid fluttering, the guide at one or both ends of the bore is segmented and a spring surrounds the free ends of the segments to deform them inwardly to define a conically inwardly tapering portion of the bore which makes highly localized contact with the valve stem.

Abstract: A packless non-refillable valve which incorporates a diaphragm.

Abstract: In a pressure relief valve, a valve body is provided with an axial bore counterbored from each of its ends to form an inlet port for connection with a container of gas to be monitored and for receiving a valve assembly at its other end opening the valve axial bore in response to the valve being unseated by a predetermined pressure in the container. The valve assembly includes a piston-type valve normally seated in the bore by a collapsible strut or pin interposed between the valve and a plug member secured to the downstream end portion of the valve bore.

Abstract: A frictional damper system particularly suited for use in preventing chatter and flutter in a liquid and two phase flow pressure relief valve. The frictional damper system includes one or more damper bodies each having a vertical through-hole and at least one inclined bore extending from the exterior of the damper body into the vertical through-hole. A friction contact member is positioned within each bore and urged inwardly by a spring device or the like. A portion of the object to be damped, such as the stem of a pressure relief valve, extends through the vertical throughhole. The type of material forming the friction member, the degree of compression by the spring device and the amount of inclination of the bore(s) is such that the vertical compression forces components of the damper spring(s) virtually negate the frictional forces created when the member to be damped moves in a first direction.

Abstract: The hot and cold water mixing device contains a rotary slide which controls in opposite sense the inflow of cold and hot water. The rotary slide is provided with a device for suppressing the flow of hot and cold water through the rotary slide. In order to render the mixing valve smooth in operation and to simplify its construction, without eliminating the advantages of such construction of mixing device, the flow suppressing device is formed by a closure portion or element of a servo valve, and the rotary slide is structured to serve as a seat for such closure portion or element.

Abstract: The spindle of a butterfly valve for controlling the supply of compressed air to the starter of a turbine aero-engine is rotated to open and close the valve by the linear movement of a slide in a cylinder in response to the pressure differential between a pair of chambers defined by the slide and the cylinder. A resilient mechanism is provided for holding the slide when the valve is closed and temporarily preventing movement of the slide to open the valve until a predetermined minimum pressure difference exists between the two chambers. The slide is then released and travels initially at high speed and then at a speed limited by a throttle venting the lower pressure chamber to atmosphere. This makes it possible to create a relatively high rate of increase in the pressure of air supplied to the starter at the commencement of opening of the butterfly valve while controlling the final rate of pressure rise. The device can thus be used equally with an inertia starter or a free wheel starter.

Abstract: A bistable electromechanical transducer is disclosed having an armature reciprocable between first and second positions, a permanent magnet latching arrangement for maintaining the armature in the respective positions, and an electromagnetic repulsion arrangement operable when energized to dislodge the armature from the position in which the armature was maintained and causing it to move to the other of the positions. In a preferred embodiment, the transducer takes the form of an electronically controllable valve mechanism for use in an internal combustion engine and has an engine valve with an elongated valve stem along with the electromagnetic repulsion arrangement for causing the valve to move in the direction of stem elongation between valve-open and valve-closed positions.

Abstract: A hot and cold water mixing valve has a sleeve formed and adapted to fit within a valve fixture such as a kitchen faucet, lavatory faucet or shower/tub control. There is a stem which is positioned within the sleeve and rotatable and reciprocal relative thereto to control discharge through the mixing valve. The sleeve has hot and cold water inlet ports and an outlet. The stem includes a piston directing flow from the sleeve inlets to the sleeve outlet. The stem also includes a stem driver formed and adapted to have an operating handle mounted thereon with the stem driver being connected to the piston by a thin rod whose diameter is substantially less than the piston outer diameter. The stem is pressure unbalanced, with the amount of unbalance being determined by the cross sectional area of the thin rod. A non-movable seal member is positioned within the sleeve with the thin rod passing through the seal member.

Abstract: A damping means for controlling the closing action of a sanitary fitting to lengthen its closing time and, thereby, reduce its closing speed, is disclosed. The damping means is operatively mounted between the handle and valve control unit assemblies.

Abstract: A pneumatic device having a housing defining at least two chambers with one of the chambers having a nozzle located therein, a diaphragm separating the two chambers, main pressure connected to one of the chambers, an output line connected to one of the chambers for providing an output signal having a value dependent upon the interaction between the nozzle and the diaphragm, and a dampening apparatus located within one of the chambers and touching the housing, the dampening apparatus being flexible for permitting movement of the diaphragm to control the output pressure in the output line and to dampen noise.

Abstract: A valve assembly having a valve seat, and a valve tappet that moves relative to the valve seat. A stop member for limiting the stroke of the valve tappet. The valve tappet includes an elongated shaft having a reduced mid-section for the purpose of increasing flexibility. The stop member for the valve tappet is a flexible ring-shaped element which functions like a spring washer. As a result of the shape of the valve tappet and of the stop member, any sudden excessive forces or stresses occurring during the opening and closing of the valve are partially suppressed by the elastic characteristics to avoid damage to the valve assembly. The energy-absorbing features avoid breakage of the shaft and eliminate deformation of the valve piston and the stop member in the area of the stop communicating surfaces, and also reduce damage to the sealing surfaces between the tappet head and the valve seat.

Abstract: A wastegate valve for an internal combustion engine turbocharger comprising a housing, a valve head carried by a valve stem and arranged to cooperate with a valve seat. The valve stem is mounted in a valve guide for movement between a position in which the valve head and seat cooperate to close the valve and block exhaust gas flow and a position in which the valve head is spaced from the valve seat to permit flow. A spring biases the valve into a closed position and a pressure plate is mounted to said valve stem, the spring acting on the valve stem via said pressure plate. A connection is provided in the housing on the side of the pressure plate remote from the spring to a supply of fluid under pressure whereby, in operation, to assist the exhaust gas in opening the valve. A wall extends across the housing to divide the interior of the housing into a portion containing the pressure plate and another portion connectible to the supply of fluid under pressure.

Abstract: A valve for regulating the passage of a fluid through pipes, in particular pipes having a large diameter, has a valve housing and a valve unit. The valve unit includes a spindle movable in vertical direction in the housing and is connected to a valve disk which reciprocates in a flow cylinder having a perforated casing. The spindle is further connected to a lifting cylinder which provides the movement of the spindle and the valve disk between a shutoff position and an open position. The valve unit of the valve is insertable into the housing and removable therefrom in its entirety without necessitating a dismantling of the housing.

Abstract: The disclosure illustrates a wastegate valve for an internal combustion engine turbocharger comprising a valve head carried by a valve stem and arranged to cooperate with a valve seat in a bypass passage, the valve stem being mounted in a valve guide for movement between a position in which the valve head and valve seat cooperate to close the valve and a position in which the valve head is spaced from the valve seat. A shield formed from a cup shaped thin wall pressing is provided at least partly surrounding the valve stem in a region thereof exposed to heat from the exhaust gases, the shield being disposed so as to deflect hot exhaust gases away from that part of the stem surrounded by the shield. Passageways are provided for conducting a flow of cooling fluid to said valve stem in between a pair of spaced valve guide inserts in at least part of the region surrounded by the shield.

Abstract: A spool valve has a seal-carrying spool movable in a valve bore terminated at one end by an end wall. A stem projects toward the end wall from an end of the spool. A hollow cylinder member is mounted coaxially on the stem via a radially inwardly extending flange which slidably receives the stem. A spring is coaxially mounted on the stem and is biased to urge the cylinder member away from the spool. A stop near the end of the stem retains the cylinder member on the stem and maintains a minimum preload in the spring. When the spool is in a position near the end wall, the end wall engages the cylinder member and moves it away from the stop, thereby compressing the spring so that the spring will be biased to move the spool away from the end wall.

Abstract: In a motion transmitting mechanism comprising a linearly moveable member (3) operating to and from an end stop, a compressible spring (9) is arranged between the linearly moveable member (5) and a supporting surface (10), whereby the spring is compressed when the member (5) approaches the end position and gives a force on the member (5) directed away from the supporting surface when the member is in its end position.

Abstract: A vibration damping device for a thermostatic expansion valve comprises a spring member having a plurality of cantilevered fingers substantially parallel to the direction of travel of moving components but which are spring loaded to provide a force normal to that direction. The damping device is fixedly attached to one of the moving or stationary components and is arranged so that its fingers exert the normal force against the other of the moving or stationary components. Accordingly, a constant magnitude frictional force is produced over the range of movement, thus damping vibrations caused by pressure pulses from the compressor of the refrigeration system in which the thermostatic expansion valve is installed.

Abstract: The invention, according to the first embodiment depicted, comprises a plate-type valve having a valving element movable between a valve guard and a valve seat. The movable valving element has a plurality of flow ports formed therein each of which communicates with a port formed in the valve guard. Too, the valve seat has ports formed therein, but the latter are out of registry with the valving element and valve guard ports. Accordingly, with the element closed upon the valve seat, fluid flow through the valve is prevented, and with the valving element removed from the seat, fluid flow is accommodated. Movement of the valving element away from and then onto the valve seat subjects the ends of the ports in the valving element to fatigue, failure and fracture. The valve seat has a circular recess formed therein, whereat the periphery of the valving element would impact, and loosely set in the recess is an impact ring.

Abstract: A check valve is comprised of a body having inlet and outlet passages and a cylindrical chamber within the body, the axis of which forms an angle with the axis of the inlet and outlet passages. An orifice plate in the cylindrical chamber divides the chamber into a dashpot chamber and a valve chamber which is in communication with the inlet and outlet passages. A valve seat in the valve chamber separates the inlet and outlet passages. A valve closure element is mounted for reciprocation in the valve chamber between a valve open position and a valve closed position where an element is seated upon the seat. A piston is mounted for reciprocation in the dashpot chamber. A piston rod extends through an opening in the orifice plate and connects the closure element and the piston. Means are provided to apply the pressure in the outlet passage to the piston to urge the piston and closure element toward valve closed position.

Abstract: To provide for extremely short valve operating time periods, in the order of up to 10.sup.-5 seconds, for example, a valve element (3, 33, 53, 63, 73, 93) is slidable within a bore (2, 52), movable by a spring (10, 60) or by applied hydraulic pressure (P), and restrained from movement by an electrical positioning element (14, 44, 45, 94) which has a positioning movement transverse to the movement of the valve element, and which clamps the valve element in the bore, or an extending flap or strip (34) against a counter element, which may be another positioning element (45). Preferably, and for fast operation, the positioning element (14) is a stack or column (15) of piezoelectric disks (16) which, when energized, push a stem or bolt element (13) in clamping direction towards the valve stem; alternatively, (FIG. 6), the positioning element (94) can be a solenoid coil pushing the armature (93) thereof into clamping direction towards the valve stem.

Abstract: The present invention provides a pressure relief valve having a broad range of variable relief pressures. The valve has an inlet passage, an outlet passage, a valve seat interposed between said passages, a valving member mounted for movement into and out of sealing engagement with the valve seat, a valve stem assembly operably connected to said valving member, and two or more resilient compression springs of preferably variable length mounted relative to said valve stem to exert a progressively greater compressive force upon said valve stem upon compression of said valve springs, and an adjustable pressure plate assembly for pre-compressing of the compression springs so as to set the relief pressure at a desired pressure value. A preferred embodiment is directed to that comprising a valve stem assembly for preventing the valve spring from being compressed beyond a predetermined selected point of relief pressure.

Abstract: A safety valve has movable and immovable valve elements, and a friction unit arranged therebetween for damping vibrations, wherein the friction unit has a plurality of friction members movable radially relative to a valve axis, a pressing member arranged to move the friction members so that their friction surfaces are pressed against a friction countersurface of a movable valve element of the movable valve means and for abutment against a stationary abutment member at their side facing toward a valve closing member, and a pretensioned auxiliary spring acting upon the friction members at their side facing away from the valve closing member and in a valve closing direction, wherein the auxiliary spring has such force and such a smaller resistance that in the event of seizing of the friction members with the movable valve element, the auxiliary spring is compressed within a predetermined opening pressure which does not considerably exceed a response pressure over approximately a valve stroke.

Abstract: An hydraulic system: a power assisted vehicle steering system which includes such an hydraulic system and a method of alleviating noise in an hydraulic system. The hydraulic system as applied to a vehicle steering gear (1) has an open center valve (3) which directs hydraulic fluid under pressure derived from a pump (12) and in response to a steering maneuver through a shaft (4) to a servo motor of the gear (1). Downstream of the open center valve (3) is a restrictor (8) through which hydraulic fluid from the valve (3) passes to a reservoir (11). The restriction effected by the restrictor (8) to fluid flow from the valve (3) to the reservoir is variable to provide a throttling action and a back pressure in the line (6) to alleviate noise in the valve (3).

Abstract: A fluid pressure reproducing relay is described having a high order of accuracy in matching the output pressure to the loading pressure under steady state conditions, having a large flow capacity for both supply and exhaust and which is small in size for its capacity, the relay having a resilient rolling seal with a vented seating arrangement that requires no clamping, having a stabilizing mass loosely attached to a force balance diaphragm assembly and in which a balanced area supply plunger is employed.

Abstract: This invention relates to pneumatic control systems, particularly to a timing device for the same, wherein a control device is maintained at a constant speed by means of a balance wheel or flywheel, whose kinetic energy furnishes a pneumatic signal and which mechanically shifts a valve to pass on the pneumatic signal. The shifting of the valve is adjustable.