Variable capacity chambers

This invention relates to the art of pressure vessels and more particularly to a valve assembly for use in a pressure vessel of the type having a rigid container with a deformable bladder therein, dividing the container into two variable volume chambers, one adapted to receive gas under pressure and...     

An expansion tank is divided into two non-communicating chambers by a flexible elastomeric diaphragm having a peripheral outward projecting, sidewall engaging protrusion that is held in compressed and sealing engagement with the tank walls by a backup ring. The diaphragm-ring assembly facilitates insertion...     

A pressure transfer unit having a movable partition including a flexible bellows for separating an internal, controlled-pressure chamber from a reference-pressure chamber. A valve is provided for limiting the volume of liquid that can be injected into and received in the controlled-pressure chamber during...     

The invention provides a capsule for damping pressure pulses in the working fluid of piston pumps and motors, the capsule being formed with co-axial inner and outer pervious walls which serve to limit the contraction and expansion of a flexible gas-filled bag enclosed between them.

For use in a sprinkler system a pressure and flow regulation device comprising a snap acting valve which includes a movable valve closure having a spring biasing the valve closure toward a closed position and a diaphragm having a surface disposed to be acted upon by inlet water pressure to urge the valve...     

Accumulator consisting of a container body and a lid body. In assembling, first the open portion of the bladder is attached to the open portion of the lid. Thereafter, the joint portions of the lid body and container body are welded. A guide ring connected to a bladder holding ring is placed at the inner...     

A flexible diaphragm for a hydraulic fluid accumulator is provided with a plurality of concentric circular ridges for engagement with the wall surface of the accumulator housing between concentric circular rows of fluid discharge openings formed in the housing. The ridges maintain the diaphragm in spaced...     

This invention relates to a pressure vessel for gas and oil under pressure comprising a container of rigid material having a cylindrical body portion defining a mouth at one end and closed at its other end, said closed end having an axial port. An annular supporting member of resilient sheet metal has...     

This invention relates to the art of Pressure Vessels, more particularly of the type using a deformable bladder having a cylindrical mouth of relatively large diameter with a thickened rim in which is bonded a rigid annular retaining member, the outer periphery of which extends radially outward beyond...     

A pressure accumulator having a hollow cylindrical housing which is inserted into the mouth of a cylindrical cavity in the body of a hydraulically operated apparatus or machine. The inner end of the cavity has a threaded recess adapted to receive the correspondingly threaded end of the housing. The interior...     

This invention relates to a pressure vessel and more particularly to a pressure accumulator having a substantially cylindrical body portion with a port at one end and a mouth at the other with a cover member adapted to close such mouth and also having a port. An annular supporting member of rigid sheet...     

The invention relates to a pressure vessel comprising a container of rigid material having a cylindrical portion defining an open mouth which is formed by reversely bending inwardly the end of said cylindrical portion to form a cylindrical flange portion. The curved junction between the flange portion...     

A hydropneumatic pressure tank, whose housing consists of a bottom part and of a top part which are connected with each other by a welded seam; a retaining ring is arranged at the inner wall of the tank within the area of the welding seam, at which is secured the bellows serving as movable partition...     

An accumulator warning system utilizing an electric system with an electric signal and wherein a movable member is disposed in a container having a gas on one side of the member and oil on the other side of the member. The movable member moves toward electric conductors when the gas in the container...     

In an accumulator consisting of a high pressure cylindrical oil vessel and a gas bladder of same figure concentrically housed therein, at the bottom of said gas bladder is provided a cushion cup with its opening upside, when the gas bladder expands in a longitudinal direction said cushion cup comes to...     

In a liquid chromatograph apparatus, a pulse damper consists of a block of solid material almost filling the cavity of the damper, for example a polytetrafluoroethylene block occupying 99% of the volume of the cavity but arranged to move freely therein.

Pressure accumulator consisting of an open-ended cylinder containing a tensioned elastic sleeve fastened to the open-end of the cylinder in which lies an open-ended vessel, the vessel being slideably carried on a post whose free end carries a piston which is slideable on the inside of the vessel.

An open-ended accumulator is provided which may be constructed to be of a relatively large size, for example, in the 15-25 gallon range, and to be of relatively high pressure of the order, for example, of 5,000 psi. The accumulator is constructed so that its internal bladder can be replaced from one...     

The present invention is directed to an improved dampener device of the type employed to dampen or reduce the amplitude of pulses in hydraulic systems. The device is characterized by increased versatility and simplicity of design, leading to low manufacturing cost.

The method of forming a pressure vessel which comprises the steps of molding the mouth of the deformable separator or bladder of the pressure vessel to one end of a cylindrical member or sleeve; thereupon inserting the end portion of the cylindrical sleeve to which the bladder is molded into the open...     

The present invention is directed to pulse dampener devices of the type employed to dampen pulses within hydraulic systems such as result from the use of pumps of the piston type. The device includes a pressure vessel having a movable partition therein, dividing the vessel into two chambers, each having...     

A desurging system is placed in the fluid flow line near the output of a fluid pump to remove pressure fluctuations created in the flowing fluid by action of the fluid pump. The fluid passes through a gas-loaded, diaphragm type, fluid desurger. A gas volume control unit automatically controls the gas...     

A diaphragm arranged in a rigid casing to define therein a chamber to be filled with a mass of gaseous spring medium and another chamber to be held under oil pressure load is normally bulged into the oil chamber and formed on both surfaces thereof with dense clusters of elastic piles or projections which...     

In accordance with the present invention, there is disclosed an improved large port pressure accumulator-pulsation dampener especially intended for use in applications where the liquid components may incorporate entrained abrasive materials. The device is characterized by an improved liquid port valve...     

The present invention is directed to a hydraulic accumulator-pulsation dampener device characterized by the valve component acting in a noiseless manner upon seating and unseating thereof, and further characterized by the valve member being readily replaceable.

A dashpot wherein a fitting including a calibrated bleed orifice formed therein is detachably retained in a valve body which houses a check valve and forms a part of a diaphragm chamber.

This invention is a breather bag apparatus used with a sealed storage bin such as a silo allowing for expansion and contraction of the air within the sealed structure. This breather bag apparatus is mountable on the sidewall of an existing silo and having a bag member that is readily observable from...     

A pressurizer for a pressurized water nuclear reactor power plant having a plurality of straight immersion heaters with pointed ends.

A closure is provided for an accumulator. The closure comprises a drain housing, a spring within the drain housing, and hollow cup-like piston within the drain housing, which is urged into an open position by the spring. With the piston in a closed position, the accumulator port is closed and blocks...     

A compensator designed to be implanted within a living body and connected to an implanted reciprocating blood pump. A housing defines a gas-tight chamber which is separated into front and rear portions by a flexible membrane. A piston attached to the membrane guides the movement of the membrane, and...     

A flexible hose line which may be used for loading and unloading oil tankers having a secondary fluid retaining reinforcement carcass to retain leakage and to indicate by radial expansion failure of the main carcass. The secondary carcass may be of high elongation material or may have an angle of lay...     

A reservoir for a fuel injection system including an intermediate plate and a yieldable member movable relative thereto. The intermediate plate includes a flow opening and a throttle opening, the opening and closing of which are controlled by a valve. The valve is operatively connected with the yieldable...     

A pressure vessel in the form of a hydro-pneumatic flexible bladder accumulator is provided which includes a shell formed of a cylindrical tube. An open-ended thimble-shaped deformable bladder of resilient material is positioned within the shell. A port plate is attached to one end of the tube, and a...     

The present invention is directed to a pulse dampener device especially effective for the efficient damping of high frequency pulses of relatively small amplitude. The invention is characterized by the provision of a low inertia diaphragm assembly disposed in intimately spaced relation to a conduit through...     

A pressure tank includes a hollow container which has an outlet for discharging fluid therefrom. The outlet is provided with a valve seat, for receiving a valve member which is slidably mounted in the container above the valve seat for respective movement between an open position, so that fluid in the...     

The present invention is directed to a pressure accumulator device and pertains more particularly to a pressure accumulator of the type incorporating a resilient, deformable bladder disposed within a rigid shell. The device is characterized by the incorporation therein of a sensor device adapted to provide...     

A disposable pressure vessel includes a gas valve containing cylindrical cap encircled by an O-ring. The cap is bonded to an annular flared portion of a generally cylindrical rubber bladder and is disposed in a hollow cylindrical housing such that the cap compresses the flanged portion of the bladder...     

The present invention relates to a pulsation dampener device comprising a pressure vessel having a flow through conduit secured thereto adjacent the oil port, the device being characterized by a sleeve member shiftable axially of the pressure vessel, the sleeve having a bladder secured thereto and providing...     

A pressure energy accumulator having a mixture consisting of CF.sub.4 or C.sub.2 F.sub.6 and N.sub.2, H.sub.2, or He, or a combination thereof, as the gaseous working medium.

A device for controlling the pressure in an inflatable cuff surrounding an endotracheal or tracheostomy tube is described.

This invention relates to a low cost accumulator device, and more particularly to an accumulator wherein, at least in the oil port adjacent portions, the pressure vessel is formed by a spinning operation effected on a tubular blank. The device is characterized by a buffer member disposed adjacent the...     

A water hammer shock absorber comprising a casing provided on both side walls thereof with a hole and innerside thereof with a cavity adapted to have a pressurized gas sealed therein, a pipe having number of small perforations defined on the peripheral wall thereof between said hole of the casing, and...     

A new and improved pulsation dampener or surge absorber having an improved diaphragm or bladder is disclosed. The diaphragm is disposed within a pressure vessel for forming two non-communicating zones. The first zone communicates with the fluid having the undesired pulsations or surges while the second...     

Centrifuge tube cap has a plug which fits into the open end of the tube. A reduced diameter stud on the plug has an axial bore and extends outside of the tube thereby forming a shoulder at the lip of the tube. The peripheral portion of the shoulder is beveled. An annular cap is placed over the open tube...     

A pressure vessel comprising a casing or container formed from two substantially cup-shaped shells, each of said shells having their free edges or rims located in juxtaposition by means of an internal annular retainer member which properly spaces such free edges to permit connection thereof by an annular...     

A pressure accumulator for a hydraulic system includes a rigid container whose cavity contains a partition of pliable, resilient material which seals one compartment adjacent the bottom wall of the container from another compartment containing a gas under a pressure sufficient for expanding the partition...     

The present invention is directed to a hydropneumatic accumulator comprising a pressure vessel or casing having a cylindrical bore, a cylindrical container closed at both ends slidably mounted within said bore, the container having restricted flow passages communicating the bore of the casing to the...     

A hydraulic pressure responsive accessory, such as a cavitation eliminator, for a hydraulic system and a replacement bladder assembly for the accessory. The accessory comprises a cartridge having an inlet for connection to a hydraulic system, and contains a gas filled flexible bladder which compresses...     

A positive expulsion tank incorporates an expanding bladder in the form of a metal bellows, which is adapted to undergo elastic deformation during a product storage condition to provide for thermal cycling of a stored product, and plastic deformation, during a product expulsion operation to achieve high...     

A pressurizing tank for a liquid dispensing system is disclosed. The system includes a pressure withstanding vessel having openings at both ends with a strainer fitting fixed in one of the openings. A flexible, inflatable, gas-tight bag is provided in the vessel and has an inflating valve at one end...     

An accumulator comprises a first container having cylindrical body with a liquid inlet at its bottom portion, a second container fixed to the open end of the first container so as to form a hollow portion with the first container, and a flexible member disposed in the hollow portion so as to partition...     

An accumulator device or the like comprising a pressure vessel having a cylindrical interior with a port at each end and an elastomeric separator or bladder interposed between the ports. An annular supporting member engages an enlarged bead at the open mouth portion of the bladder. The device is characterized...     

A pulse damper for use in high-pressure liquid pumping applications such as liquid chromatography comprises a length of flattened polytetrafluoroethylene tubing that can be coupled to the high-pressure liquid flow line. The flattened tubing is enclosed within a liquid-tight housing structure completely...     

Disclosed is an improved surge stabilizer for reducing and controlling pressure surges and vibrations which cause destructive wear to pumps. The stabilizer includes a cylindrical case which is placed in pressure communication with the pump working fluid, and an internal pressurizable cylindrical cartridge...     

A pulse dampener device in which the effective cross section of the flow path through the dampener assembly may readily be varied thereby enabling the device to be adjusted or tuned to deal most effectively with any of a variety of pulse variables encountered in a particular installation.

A pressure vessel includes a housing having an interior and a passage communicating with the interior and being bounded by an inner circumferential surface. A separate plug is received in the passage. The plug has an outer circumferential surface juxtaposed with the inner circumferential surface. These...     

An insert type attenuator arranged to function as a broad-band frequency rejection filter for pulsations in a liquid in a conduit, such as a liquid stock suspension being fed via a pipe line to a paper making headbox, which includes a housing, a conduit positioned within the housing, and a flexible diaphragm...     

A hydropneumatic assembly particularly for use as a pressure reservoir in a shock absorber includes a housing with a diaphragm operatively mounted within the housing to define therein a liquid chamber on one side of the diaphragm and a gas chamber on the opposite side thereof. The liquid chamber is defined...     

A pipeline having a plurality of outlets spaced along its length is connected to a controllable supply of liquid under pressure. A transversely expandable and collapsible bladder is fixed in position within the pipeline interior and extends along its length to overlap the locations of the outlets. Air...     

The invention relates to a pressure pulse dampener device to be used in association with a liquid conduit, said device comprising a pressure vessel having a movable partition therein defining two chambers, each having a port in communication therewith, one of the ports defining a gas port for charging...     

A low cost repairable accumulator device having an effective seal defined between an end cap carrying the gas charging valve assembly and the remaining components of the pressure vessel without the use of O-rings or like auxiliary sealing members. The bladder assembly incorporates integral protuberances...     

The present invention is directed to a dependable, low cost, low pressure accumulator characterized by the provision of a bladder support subassembly secured to an end cap member by an annular weld line, the connection between the noted components being effected prior to insertion of the assembly and...     

A pneumatic vehicle wheel contains, within or on the hub, a closed air reservoir or reservoirs, connected by one or more channels to the air cavity in the tire. The dimensions of the channels are such as to allow restricted bidirectional flow of air between the tire and the reservoir, dissipating energy...     

A guided-float accumulator suitable for use with a hydraulic system for an oil well blowout preventer is provided with a vented float movable along a transversely centered, normally vertical guide rod according to the level of the liquid fill within the vessel. The vent outlet for the float and a ballast...     

The present invention is directed to a low cost accumulator device having a pressure vessel formed of two components, namely, a shell and a cap, the seal between the shell and cap being effected in the course of mounting the shell to the cap by compression of a thickened rim portion of the bladder between...     

This invention relates to an improved pressure pulse dampener device comprising a pressure vessel having a movable partition therein dividing the vessel into two chambers, each chamber having a port in communication therewith, namely, a gas port for charging one of said chambers with gas under pressure...     

The present invention relates to an apparatus for dampening pulses in a hydraulic system and is characterized by the provision of a hydraulic accumulator device having disposed in the hydraulic flow path a baffle member shiftable from the exterior of the dampener in a direction normal to the flow path...     

A pulsation dampener providing high attenuation in a narrow quiet band or frequency. The pulsation dampener is tuned to provide a reflected wave 180.degree. out of phase in the narrow band to cancel the undesired pulsation. A silicone polymer contained by a diaphragm is used as the dampening fluid. The...     

A guided-float accumulator suitable for use with a hydraulic system for an oil well blowout preventer is provided with a wing shut-off valve. Radially inwardly directed outlet parts are aimed at the bottom of the valve wing to generate unbalanced reaction forces which oppose the bernoulli effect forces...     

The present invention relates to a surge absorber that may be easily custom fabricated to a particular flow line application. The surge absorber prevents "water hammer" by providing an enlarged compressible fluid chamber that is separated from the flow line by a diaphragm. When the pressure surge occurs,...     

A pulsation dampener device particularly adapted for the efficient dampening of pulsations over a wide frequency range. The device is characterized by the ability to operate over a high temperature range and be operable when contacted by corrosive and like aggressive fluids within which pulses are generated....     

A fluidborne noise attenuator (14) comprises a dampening medium (27) which exhibits a bulk modulus (e.g., 50,000 psi to 180,000 psi) substantially greater than that of an inert gas, such as nitrogen, and substantially less than that of a hydraulic working fluid (e.g., 225,000 psi). The attenuator (14)...     

An accumulator device comprising a pressure vessel having a replaceable bladder assembly adapted to be inserted into position within the vessel through a bore defining the gas charging port. The device is characterized by the provision of a bladder assembly having a stem molded thereto and adapted to...     

A pressure vessel comprises a rigid envelope enclosing a chamber and consisting of a body and cover, the rim of the cover being inserted in the rim of the body, and the body and cover being secured to each other. Defined between the overlapping rims is an annular groove adapted to receive a flange at...     

A noise damping device is proposed for the reduction and smoothing out of compressional vibrations of a conveying medium, especially fuel conveyed by fuel feed pumps, which device serves for diminishing the continuous pressure vibrations by means of suitable damping installations in the fuel circulation....     

An inexpensive pressure vessel which can be disposed of rather than being repaired once it fails, which includes a cylindrical housing having two chambers separated by a resilient bladder. One chamber is for housing a gas while the second is for housing a fluid such as hydraulic oil. The cylindrical...     

A mushroom-shaped shield body, that is, a shield body having a configuration consisting of a back surface tapered section having its diameter successively increased towards the inside of an accumulator and a stem portion, is disposed coaxially at the inside end portion of a liquid feed/discharge port...     

An accumulator incorporating an improved plug retaining assembly for supporting the plug and associated valve asssembly in the oil port of an accumulator device. More particularly, there is provided in accordance with the invention a split locking ring assembly adapted to be deformed in such manner that...     

A pressure vessel having a housing subdivided by a flexible partition into an upper gas portion and a lower liquid portion. The gas portion of the housing forms a gas chamber surrounding by an upper wall formed of curved lines of various radius. An inlet to receive a pressure gas is formed in the upper...     

A hydraulic accumulator or pulse dampener device susceptible of being repaired by replacing the bladder assembly through a removable gas charging valve. The device is characterized by a structure connecting the bladder assembly to elements of the gas charging valve assembly whereby a secure connection...     

The present invention is directed to an accumulator device and more particularly to an accumulator device having a spherical reservoir chamber which is preferably formed by hydraulic distension of a shell. A casing, bladder, and mounting fixture are combined with the shell by a metal forming operation...     

A hydrostatic bladder-type storage means for storing mechanical energy by a compressible media in a pressure bottle. An interior of the pressure bottle contains an elastically resilient bladder accommodating the medium. The pressurized medium is introduced into the bladder from one side of the bottle,...     

A noise damping device is proposed for reducing and smoothing pressure fluctuations in a damping medium, especially in fuel supplied by fuel supply pumps, which serves to reduce pressure fluctuations downstream of the fuel supply pump. The noise damping device includes a diaphragm fluctuation damper...     

The valve of the pressure vessel has a head portion adapted to close the liquid orifice and a stem portion mounted slidably in a guide and defining therewith a variable-volume liquid chamber. A passage is provided between the chamber and an orifice disposed in the vicinity of the head portion. The passage...     

A pressure pulse damping device which is used in a liquid passage having a bottom flat wall. The flat wall has an opening therethrough with a flexible diaphragm positioned therein. The side of the diaphragm opposite the liquid passage is in communication with a gas chamber having gas therein. The diaphragm...     

The invention relates to a hydropneumatic accumulator in which a bladder or membrane supported within a vessel establishes a chamber for confining a compressible fluid within the vessel and also provides means for supporting a valve plate opposite inlet and outlet ports arranged so that as the valve...     

An accumulator having a housing, a spring-loaded liquid inlet-outlet valve, a gas charging and release valve, and a gas-liquid separator in which a top is provided releasably connected to the housing for servicing the accumulator from the top. The top is slidably insertable into the top of the housing...     

The present invention is directed to an accumulator device and method of making the same characterized in that the bladder support member is connected to the body of the pressure vessel by a resistance weld between relatively thin gauge portions of the vessel and the bladder support, the device being...     

A pulse damper for inclusion in chromatograhy systems subjected to high pressures and comprising a body having one face from which a cavity extends inwardly to receive non-aqueous compressible fluid, a non-metallic diaphragm of limited flexibility extending across said cavity and clamped to the rim thereof...     

The present invention is directed to an accumulator device and method of making the same. The pressure vessel in accordance with the invention includes a shell portion having an open mouth and a cap member affixed over the open mouth after a bladder assembly has been secured within the shell portion...     

A sleeve-type bladder accumulator having an outer generally cylindrical body, an apertured cylindrical stop tube concentrically disposed within the cylindrical body, an elastic tubular bladder sleeve partially enveloping the stop tube with each end of the sleeve being anchored by sandwiching between...     

A separator is positioned to prevent pulsating fluid from mixing with working fluid or from contaminating dampening devices when dampening pulsations or eliminating cavitation. The separator includes a cylinder connected at one end to the source of pulsating fluid and the other to pressurized working...     

An oleopneumatic accumulator having a first chamber receiving hydraulic fluid and a second chamber receiving pressurized gas with the chamber being separated by a flexible diaphragm is disclosed. The accumulator has a cylindrical shell with two open ends closed by plugs. The plugs are held together by...     

A flanged cylindrical valve casing is loosely inserted into a bore of a pressure container from its inside towards its outside. A fuse packing is interposed between the flange and the inside surface of the pressure container so that when this fuse packing has molten the flange may make direct contact...     

A pulsation dampener and acoustic attenuator for hydraulic systems is designed to be inserted into a liquid flow line. The dampener is a flow-through device with a pressurized bladder restrained within a perforated sleeve. The arrangement of inlet/outlet ports, the bladder, and the screen provides means...     

An accumulator comprises a pressure vessel having a detaining step, a bladder inserted therein and provided with a flange, and a threaded plug to close the opening of said pressure vessel, said threaded plug having a downward projection to be inserted into the inner side of the opening of the bladder,...     

The invention relates to a liquid pulsation dampener device for use in a piping network, including at least one hydro-pneumatic vibration dampener arranged at the delivery side of a positive-displacement pump. Such pumps are apt to impose normally undesirable periodic fluctuations or pulsations upon...     

A gas-liquid spherical accumulator which includes a spherical integral cast metal housing having top and bottom ports. The top port is adapted to receive a gas valve and the bottom port releasably supports a circular valve seat. A vertical guide rod is connected to the valve seat and extends upwardly...     

A volume control device for a sealed reservoir for storing oil under pressure and which supplies oil to a power circuit. The volume control device has an expansible bellows assembly which contracts upon a predetermined increase of volume of oil in the reservoir to bring a rod into engagement with a ball...     

A pressure accumulator having a shell with the upper portion forming a dome having an axial gas opening, the shell having an axial oil port opposed to said gas opening, a holder in said shell supporting a bladder, a movable convex structure positioned in the shell between the holder and the gas opening,...