Abstract: A pressure regulating valve has a valve chamber having an inlet for connecting to a pressure source, a discharge chamber communicating through a valve opening with the valve chamber, a valve member, a valve seat surrounding the valve opening, a valve closing spring which presses the valve member against the valve seat with an adjustable spring force, and a throttling surface arranged downstream of the valve opening so that between the valve member and an inner wall of the discharge chamber, a pressure is formed at the valve member which counteracts the spring force.

Abstract: High pressure check valves and fittings, including button head fittings, sealant fittings, and lubrication adapters, that are equipped with dynamically self-centering plungers. Each metallic fitting comprises a fluid inlet and a fluid outlet. The inlet end of each may be configured to be mechanically engaged by high pressure hoses, grease guns, or the like. The outlet end is configured, as by threading, for coupling to the desired application. The inlet and outlet are in fluid flow communication, and meet at an internal valve seat. A steel ball forms the check valve element. The ball is dynamically controlled and centered by a dynamic plunger coaxially and slidably disposed in the fitting. A return spring coaxially mounted on the plunger normally urges the ball and the plunger towards the valve seat to close the fitting. A plunger crown is integral with an elongated, dual-diameter shaft. A conical depression in the crown seats the ball for centering.

Abstract: A pressure relief latching solenoid valve includes one or more axially magnetized permanent magnets disposed proximate a pole piece with the axial magnetization direction of the magnet aligned in a manner to maintain the armature in either the first or second position after the electrical current pulse to the solenoid is terminated so as to provide bistable first and second armature positions that can be maintained without solenoid energization and that can be changed from one position to the other by an electrical current pulse to the solenoid. The armature can control movement of a ball valve of a fluid circuit such that the first and second armature positions correspond to closed and open positions of the ball valve. The closed position provides a maximum fluid pressure in the circuit and the open position provides a preset lower fluid pressure. A spring resides in a passage in the armature and has a preselected spring rate and spring preload.

Abstract: Check valves (500) are incorporated into a fuel injector so as to form a controlling orifice in the system between the solenoid vales which direct fuel to the respective injection and timing chambers of the fuel injector and the chambers themselves. The precision fuel metering capability of the valve (500) is determined by an annular clearance created between the plunger (512) of the valve and the valve body (510) when the valve is in its maximum stroke. For achieving a bi-stable operation of the valve, the ratio of the plunger valve seat (510d) area to the maximum plunger valve (512b) area and the spring (514) are key parameters. The check valves (500) are formed as cartridge type check valves that can be calibrated outside of the injector prior to the installation thereof.

Abstract: A valve includes a valve body including a recess therein, a valve element movably disposed in the recess and a seal member disposed in the recess. The seal member has first, second and third separate and distinct sealing surfaces which are engageable by the valve element in response to fluid pressure in the recess.

Abstract: An adjustable damping valve in a damping valve housing for a vibration damper includes a valve unit with an inlet opening in the region of a valve seat face. A valve disk is supported on the valve seat face. The valve disk is pretensioned on its rear side by a spring, wherein the pretensioning of the spring is adjustable for changing the damping force in that a supporting surface of the spring is displaceable. The supporting surface is in a working connection with a catch device, wherein the catch device can be locked by steps in that the spring which acts on the valve disk applies force to the locking bodies of the catch device in a catch profile for resiliently holding the supporting surface in a locked position.

Abstract: A vehicle braking system including an antilock braking system or a traction assist braking system, or both, operatively coupled therewith, is disclosed. The system includes a pump assembly including a housing defining a main bore, an inlet bore, and an outlet bore. A reciprocatable piston is retained in the main bore. An inlet check valve is operable to pass fluid to the outlet bore when the piston reciprocates. An outlet check valve is inserted into the outlet bore and operates to pass fluid from the pump assembly when the piston reciprocates. A deformable flange extends sufficiently outward from a valve body of the outlet check valve. The flange secures the outlet check valve within the outlet bore when the flange is deformed into displacing engagement with the outlet bore. Further, a method of securing a valve in a bore of a pump assembly is disclosed.

Abstract: A transmission fluid cooling system includes a cooler-bypass unit having a banjo bolt relief valve. The banjo bolt relief valve includes a head portion and a body portion. A relief valve is incorporated into the body portion. A valve seat is formed between the head portion and body portion. A ball is biased against the valve seat toward the head portion by a spring within the body portion. When the transmission fluid is cool and viscous, pressure buildup in the head portion overcomes the spring bias of the ball against the valve seat, permitting the flow of transmission fluid through the cooler-bypass unit, bypassing the transmission fluid cooling unit.

Abstract: A check valve having a housing (2, 4) and a ball (22) movably disposed therein on a guide member (28) and driven by a flowing medium, and able to come in contact with a seat (24) due to the force of gravity. The check valve is designed such that, even in case of low pressure differences or small back-flows of the flowing medium, a secure blocking is assured. To this end the guide means is configured as a ridge (28) of plastic which slopes toward the seat, on whose upper edge (30) the ball (22) can roll onto or into the seat (24), and the ridge (28) is disposed entirely within the first housing member (2).

Abstract: A check valve (12) includes a cage (14) having a tubular side wall (16) including outward and inward undulations (28,30) that provide fluid flow through the check valve and externally thereof as well as providing guiding of an associated valve element ball (36).

Abstract: The invention concerns a valve arrangement installed in a hydraulic system including a housing (17a, 17b) which is provided with two connections (22, 23) and includes a closing element (14) which lies in a neutral position on a valve seat (6). In accordance with the invention, a valve element (11) is provided which has two step valves (15a, 15b), arranged at a distance, each being associated with one flow direction, whose the closing elements (14) are acted upon by a spring force.

Abstract: A vacuum cup safety device selectively maintains pressure within a vacuum cup for an extended period of time until release of the vacuum is desired. The device includes a housing having first and second apertures extending through a first portion of the housing and in communication with a third aperture extending through a second portion of the housing. First and second seals are positionable within first and second apertures, and extend radially inwardly within the first and second apertures a predetermined distance for defining first and second check valve seats. First and second check valves composed of a hard, polished material are provided within the first and second apertures. Each of the first and second check valves is insertable within the respective aperture of the housing and is reciprocally movable therein between a first position seated with respect to the corresponding check valve seat and a second position longitudinally spaced from the corresponding check valve seat.

Abstract: A check valve and a seating valve incur less deformation of a seat, providing good sealing performance.

Abstract: A new Pressure Limiting Tire Deflator System for deflating a tire to a pre-selected pressure for increasing traction during travel within loose dirt or sand. The inventive device includes a spherical head formed for engaging a valve stem, an elongated neck, an air passage projecting through the spherical head and through the elongated neck, a plurality of air release passages, and a pressure limiter within the air passage. The pressure limiter is adjustable for preventing air pressure within the tire from falling below the pre-selected pressure.

Abstract: A tire device for controlled vehicle tire deflation including, a hollow rod having a top end, a bottom end, an exterior surface being knurled, and a hole therethrough having an upper portion adjacent the top end and a lower portion adjacent the bottom end capable of engaging a tire valve; a hollow set screw having a rounded head with a hex opening therethrough and an elongated body positionable in the upper portion of the hole of the rod; a valve depressor disposed inside the rod having an interior end with three support bars extending therefrom spaced away from the lower portion of the hole and an exterior end spaced within the lower portion of the hole capable of engaging a needle valve of a tire valve assembly; and a valve positioned within the rod having a spring with an upper limit being in communication with the set screw and a lower limit, a resilient supporting structure with a seat end and a base end being in communication with the support bars of the valve depressor, and a sphere therebetween being

Abstract: A check valve normally blocks fluid flow from a bore to a passage and includes a spring normally holding a ball in sealing engagement with a valve seat to form a primary metal-to-metal hard seal. Another spring normally holds a poppet in engagement with another valve seat causing an annular protuberance formed on the poppet to sealingly engage a resilient seal to provide a more positive secondary soft seat seal. The poppet is unseated from the valve seat by a stem of a piston prior to the ball being unseated from the valve seat by a guide stem of the poppet so that the soft seal is opened at essentially zero flow conditions.

Abstract: In a refrigerant compressor, a discharge valve assembly which reduces reexpansion volume. The present invention provides a discharge valve assembly for reciprocating, rotary, and scroll types of compressors, and includes a spherical valve member that engages and penetrates a discharge port provided on a compressor cylinder head, valve plate or scroll plate. The discharge port is formed in the cylinder head or scroll plate and is dimensioned such that the spherical member penetrates and substantially fills the discharge port. The reexpansion volume within the discharge port is thereby reduced. To maintain engagement of the spherical member with the discharge port, an elastically deformable arm having an aperture is positioned to hold the spherical member in the discharge port. The arm is elastically deformable to allow the spherical valve member to move out of engagement with the discharge port during the compression phase of the compressor.

Abstract: In a bush insert with an orifice for a liquid-containing housing, which is insertable as a bush (22) in a passage opening (21) in the housing (3), includes an orifice (25) in its base, the base of the bush insert (22') is formed as a cone (29) pointing counter to the direction of flow (P') of the liquid and having the orifice (31) located in its tip (30).

Abstract: A pressure gauge has a housing unit which includes an air inlet, an air outlet, an air chamber communicated fluidly with the air inlet, and a pressure relief chamber communicated fluidly with the air chamber via a pressure relief passage and with the outlet via a check valve. An adjustment rod is threaded on the housing unit and can be rotated so as to move in the housing unit. A reed spring is carried on the adjustment rod by a spring carrier and pushes a ball to close the upper end of the pressure relief passage. When the air pressure of the air chamber exceeds a preset value which corresponds to the position of the adjustment rod relative to the housing unit, the ball is pushed upward to disengage from the upper end of the pressure relief passage so as to permit excessive air to flow from the air chamber to the outlet.

Abstract: An air flow rate regulation apparatus is used for regulating a flow rate of discharge air of an air pump used for breeding aquarium fishes. The apparatus includes a cylindrical control member having a hollow chamber defined thereinside and a regulation hole formed in the outer peripheral surface thereof and a cylindrical regulation member having a regulation recess overlapping with the regulation hole and made of a flexible material. The regulation member is rotatably fitted over the outer peripheral surface of the control member so as to adjustably cover the regulation hole, and the overlapped area of the regulation hole and the regulation recess is increased or decreased by rotating the control member and the regulation member relative to each other so that the overlap area can be continuously increased or decreased over a broad range of the rotating angle, 90.degree. or larger, of the control member and the regulation member.

Abstract: A spray gun includes a barrel portion and a handle portion having a control lever pivotally mounted to a lower end of the handle controlling a valve system. The spray gun includes an interchangeable fitting for receiving two fluid lines. The lever is movable between a first lockable spray position, opening the valve system to spray one fluid, and a second spray position spraying two fluids.

Abstract: A windshield washer system has a nozzle mounted on a vehicle for issuing wash fluid to a windshield and a check valve for a fluid circuit from a supply of wash fluid to the nozzle. The nozzle has a fluid feed tube integrally formed therewith with annular walls defining a washer fluid flow path and a diameter of at least D. The feed tube has an external surface adapted to receive and retain a flexible hose from a supply of wash fluid. A spring shoulder receives a coil compression spring having upstream and downstream ends with the downstream end bearing on the spring shoulder. A valve element bears on the upstream end of the spring element, and a tubular insert having an inner end and an external diameter at least D and sufficient to form an elongated wash fluid seal with the annular walls defining a washer fluid flow path, and complementary-shaped valve seat formed on the inner end.

Abstract: A valve for high-pressure radial piston pumps suitable for controlled brake systems. Prior art pumps consist of at least 5 elements. The valve includes less components and thus is less expensive to manufacture and easier to assemble. The valve's simplicity derives from the use of cold extruded connections between the valve and the housing, so that separate rubber sealings are superfluous, and which provide for a strong and non-detachable connection. Favorable embodiments of the present invention integrate some of the known valve elements thus reducing the number of the necessary cold extruded connections.

Abstract: An automatic lubricator which includes a cylindrical oil container, a piston reciprocated in the oil container, a container holder covered on the bottom open end of the oil container and having an oil inlet and an oil outlet, two reversed coil springs concentrically mounted in the oil container to force the piston downwards in closing the oil inlet and oil outlet of the container holder, a control switch fixed to the container holder and having an adjustment screw turned to control the flow rate of the oil outlet, and a valve assembly installed in a hole on the control switch to control the passage of the oil inlet of the container holder.

Abstract: A plug for a quick disconnect coupling for connecting an hose and being received in a socket, the plug has a hose fitting portion and a socket fitting portion. The hose fitting portion is fitted with the hose. And the socket fitting portion being received in the socket includes holes for letting its internal space communicate with the outside arranged radially in the socket fitting portion. Furthermore, the socket fitting portion may includes a self-seal valve for sealing a head opening of the socket fitting portion.

Abstract: A winterizing check valve system comprised of a cylindrical check valve having a hollow securement portion and a housing portion. The hollow securement portion is adapted for coupling with an end of a return line for a swimming pool. The housing portion is adapted for securement to the hollow securement portion. The housing portion has a spring therein. The housing portion has a ball coupled therein adjacent to the spring. The housing portion has a plurality of openings therein. The check valve system has an adapter plug having a first end and a second end. The adapter plug has an opening formed therethrough. The first end is adapted to couple with an opposing end of the return line for the swimming pool. The second end is adapted to couple with a compressor.

Abstract: A method and apparatus is provided for high pressure one-way fluid valving in angiography. The method includes inhibiting the flow of a sterile saline solution through a catheter lumen using the pressure of an opaque dye injected therethrough. A one-way fluid valve connects a pressurized source of saline solution to an inlet fitting of a catheter Y adapter. A second inlet fitting of the Y adapter is connected to a high pressure opaque media source through a gate valve. The one-way fluid valve is sensitive to a pressure differential thereacross to selectively open and close in response to the pressure within the catheter lumen versus the pressure of the saline solution. The one-way fluid valve includes a stainless steel check ball, a stainless steel biasing spring and double sealing O-ring adapted for radial compression by the stainless steel biasing spring and the pressure differential across the valve.

Abstract: A non-drip valve for the discharge of liquid comprises a through-flow channel (2) from whose end the liquid emerges and at least one elastic member (12) within the through-flow channel (2) which reduces its volume when the pressure in the liquid increases and thereby frees the through-flow channel (2) and which enlarges its volume when the pressure of the liquid flow decreases and closes the through-flow channel when the pressure of the liquid flow falls below a certain pressure value.

Abstract: A valve assembly is disclosed for an oscillating pump of the type having a reciprocating armature carrying an impeller that defines a pump chamber for flow of fluid through the pump. The valve assembly includes a valve body mounted to the impeller, a valve seat attached to the valve body, a spring retainer, a spring mounted to the spring retainer and a plug located between the spring and the valve seat. The valve assembly provides a substantially fluid tight seal when the pump is discharging fluid and allows fluid to enter the pump chamber when the pump is suctioning. All wetted components are particularly suitable for corrosive fluids, such as acids.

Abstract: A container for supporting a quantity of fluid relative to a limb of an individual. The inventive device includes a container having an arcuate inner side wall positionable along an exterior of a human limb. A plurality of securing straps extend from opposed sides of the container for securing about the limb to mount the container thereto. A dispensing valve is mounted relative to the container to permit dispensing of fluid therefrom during a physical activity.

Abstract: The pressure-relief valve (10) has a valve member (18), which interacts with a valve seat (17). The valve member (18) is forced with a certain pretensioning against the valve seat, which pretensioning is applied by way of a diaphragm (21), either directly by this or by virtue of an additional spring means. Whenever a predefined maximum pressure is exceeded, the diaphragm (21) comes to bear against a stop face (26). Due to the free guidance of the valve member (18) tight, contamination-sensitive gaps are avoided. Although the pressure-relief valve is compact, secure bearing contact of the valve member against the seat is nevertheless ensured (FIG. 1).

Abstract: A fluid actuated ball check valve assembly having an annular housing containing a ball valve. The annular housing has a first end and a second end. The annular housing defines a fluid passageway having a passageway axis extending therethrough. A fluid actuated ball valve is pivotally mounted in the fluid passageway. The ball valve defines a bore having a bore extending therethrough. Resilient members, such as a sleeve in contact with a coiled spring, engage the ball valve to maintain the ball valve in the fluid passageway. Pressurized fluid in the fluid passageway at the first end of the annular housing causes the ball valve to pivot from a closed position to an open position to allow fluid to flow through the fluid passageway from the first end to the second end of the annular housing.

Abstract: A fluid flow control valve, e.g. a pressure vacuum breaker, includes a thermal expansion relief valve for protecting the control valve against damage due to freezing. The control valve has a valve body of rigid material and defines a main conduit. The thermal expansion relief valve has a relief valve body mounted to the main valve and defines a relief conduit in fluid communication with the main conduit, a valve element the moves within the relief conduit between a first sealing position in engagement with a valve seat to resist flow and a second position spaced from the valve seat to allow flow from the main conduit through the relief conduit, and a spring urging the valve element toward sealing position with a predetermined force selected to exceed normal operating pressure of the main valve and to lie below pressure damaging to the main valve. A thermal expansion valve for protecting fluid flow control valves, e.g. by retrofit, is also described.

Abstract: A pressure relief valve includes an apertured ball valve element which is spring loaded and is rotatably and axially mounted in the valve bore so that when an over pressure situation arises fluid forces the ball axially off the valve seat against the force of a spring and causes the ball valve to rotate such that the aperture in the ball valve connects the inlet bore and outlet bore of the valve housing so that fluid can flow through the pressure relief valve. When pressure at the inlet falls beneath a predetermined value, the spring forces the ball to rotate and move back against the valve seat, thus closing the valve. With this arrangement there is minimal pressure exerted on the valve housing and the valve will operate with a back pressure up to 50% of the inlet pressure. This means that much smaller bore outlet piping can be used with a savings in weight and, consequently, cost.

Abstract: An improved one-way valve structure for a hydraulic jack includes a stepped inlet end at a L-shaped intake passage for fixing of a filter. The diameter of the filter is slightly smaller than the inner diameter of the intake passage. The filter is designed so that it can be firmly positioned in the inlet end of the intake passage. Hydraulic fluid is filtered by the filter at the intake passage while it is passing through the one-way valve so that foreign particles in the hydraulic fluid from an oil reservoir are completely prevented from entering a pump seating and a pumping cylinder. Hence, the hydraulic fluid entering the pumping cylinder upon pushing of a handle on the pump seating does not contain impurities. In particular, as there are no foreign particles clogging the pressure release passage, normal pressure relief whenever the jack is overloaded can be assured to discharge the hydraulic fluid to the oil reservoir automatically. Consequently, damage to or explosion of the cylinder can be prevented.

Abstract: The control valve includes a spring refiner which is threadly retained in the valve body and which may be adjusted so as to incrementally vary the hydraulic pressure required to open the valve. The valve additionally includes stops or limits so as to prevent the spring retainer from being grossly misadjusted which, when used in the hydraulic control system of the recloser, may cause undesirable miscoordination with the operation of other circuit breakers and protective devices. The valve additionally includes a self-locking mechanism to prevent the valve from falling out of adjustment due to vibration or improper handling.

Abstract: A feed pump for a hydraulic system that is equipped with at least one outlet valve whose valve-closing body is loaded by a valve spring. The valve-closing body is held at a distance form its valve seat by means of a gas-filled hollow-body ring so that the feed pump can be evacuated through its outlet valve for subsequent filling with a hydraulic pressure medium. With a first increase in pressure in the system, the hollow-body ring is pressed together, so that the valve-closing body slips through the hollow-body ring and reaches its valve seat, thus making the outlet valve operational. The feed pump is suitable for use as a return pump for anti-skid systems of hydraulic brake systems.

Abstract: A relief valve is built into the nozzle port of a fuel pump for an oil burner and opens to relieve pressure in the fuel supply line and prevent oil from dripping out of the burner nozzle when the pump is shut down. The relief valve comprises a ball which is normally held in a closed position by an arcuate leaf spring wrapped partially around the nozzle port.

Abstract: An implantable drainage valve for the treatment of hydrocephalus is described. The valve includes a body, a valve seat, a closure member, a spring and at least one spherical weight. The spring is positioned within the cylindrical chamber of the valve body and between the closure member and the spherical weight. The valve is intended to be vertically oriented when the patient is sitting or standing and, when so oriented, the weight will provide additional compressive force against the spring to help maintain the valve in a closed condition. Consequently, hyperdrainage is avoided when the valve experiences normal variations in fluid pressure differentials such as when the patient rises from a lying or recumbent position to a standing position.

Abstract: A small single cylinder hermetic refrigeration compressor has a flat valve plate extending across the end of the cylinder. A discharge port is formed in the valve plate with a spherical valve seat and a spherical poppet member is moveable to and from the valve seat. A flat leaf spring and valve stop member fit over the poppet to control its motion and the spherical head of the popper, when closed, extends beyond the surface of the valve plate in alignment with a mating recess on the piston head to minimize the clearance space of the compressor.

Abstract: The present invention provides a check valve which, when placed at the end of a pump suction pipe, allows the pump to draw fluid therethrough from a continuously replenished, below-ground fluid source. When the fluid in the fluid source has been depleted to a level below that which allows fluid to be drawn therefrom by the pump, the present check valve maintains the suction pipe full of fluid. The check valve also maintains the suction pipe full of fluid when the pump has been shut off. In this manner, the pump can resume drawing fluid from the fluid source without the need for priming.

Abstract: A micropump comprises a housing for defining a pump chamber, an inlet valve disposed in an inlet flow passage, a outlet valve disposed in a outlet flow passage, and an actuator for changing a volume of the pump chamber. The actuator is formed of a thermo-responsive polymer gel material. Fluid is supplied and fed by heating and cooling the actuator.A micropump comprises a pump body member for defining a tank chamber holding liquid, a liquid inlet portion, a liquid outlet portion for discharging the liquid medium in the tank chamber, a liquid outlet portion for discharging the liquid medium in the tank chamber, and an actuator, for reducing a volume of the tank chamber. The actuator is formed of a liquid-absorptive polymer gel.

Abstract: A system for alleviating leakage or weepage from a pressure relief valve found on conventional hot water heater tanks due to water pressure build-up in residential water lines caused by the application of intense heat with fast recovery type hot water heaters wherein a water pressure relief valve is easily and quickly connected between a washing machine water supply outlet faucet and a flexible washing machine water inlet hose and water vented from this pressure relief valve is vented through a flexible hose to an appropriate drain.

Abstract: A fluid actuator of the type for producing reciprocal movement is provided having a cylindrical housing adapted to be secured to a relatively stationary object. The cylindrical housing includes first and second end portions and respective first and second fluid ports positioned therein. A piston is disposed for relative movement within the cylindrical housing and defines first and second fluid chambers within the housing. The first fluid chamber is in communication with the first fluid port and the second fluid chamber is in communication with the second fluid port. A piston rod connects to the piston and extends outwardly from the first end portion of the housing. The piston rod is adapted to be connected to an object to be moved. A conduit communicates with the first fluid chamber through the first fluid port in the first end portion of the housing and extends longitudinally from the first fluid port alongside the housing to the second end portion of the housing.

Abstract: A reversible flow thermal expansion valve for use in a heat system is disclosed wherein the thermal expansion valve includes a valve body having a flowpath therethrough with an inlet and outlet, an expansion port within the flowpath, and an expansion valve to open and close the expansion port. An internal by-pass flow path by-passes the expansion port for reverse flow through the expansion valve. A check valve in the by-pass flow path prevents refrigerant from by-passing the expansion port during regular, forward flow through the expansion valve. The check valve has a spring to bias the check valve normally closed, and a bypass port communicating between a check valve guide path chamber and a check valve outlet in order to relieve pressure in the guide path chamber and increase the flow rate through the check valve.

Abstract: An automatic flushing system for poultry watering systems is provided which includes a bypass of the upstream pressure regulator, self sealing caps for the stand pipes and a readily disassembleable automatic flush valve at the end of the supply line. A shut-off valve in the bypass is provided which is actuatable manually or automatically in response to a timer, environmental sensor or water condition sensor. The automatic flush valve opens in response to a predetermined pressure level and connects the supply line to a drain hose. The automatic flush valve can include an end cap which is removable from the flush valve and which facilitates cleaning of the valve and supply line. The self sealing caps prevent leakage out of the standpipes and are especially formed to prevent blow-outs of the seal. Where multiple pressure regulators are used in the supply line, additional automatic flush valves can be positioned in a bypass line around those regulators.

Abstract: A heat exchanger oil cooler with a bypass valve arrangement for relieving the pressure of the fluid flowing through the heat exchanger tube. The bypass valve arrangement is threadedly connected to the inner tube of a coaxial tube heat exchanger.

Abstract: The object is to shorten the installation length of the pump. The high-pressure pump has a pump housing with a bore, in which a pump element having a cylinder, a piston longitudinally movable therein and an outlet valve is received. The cylinder is screwed into the bore and axially fixed at a bore step. The outlet valve has a ball, received in a hollow-cylindrical extension of the cylinder and loaded on its end remote from the valve seat by a leaf spring secured to the cylinder. The hydraulic high-pressure pump is usable in particular in motor vehicle brake systems having an anti-lock and possibly traction control system.

Abstract: A locking device for a drum for chemical- and hazardous-waste containment is described. The locking devices are of drums, usually 30- or 55-gallon sizes, of the closed-end type having a head with two openings or bung holes therethrough. Each drum opening has a flanged or internal portion with interior threads. The locking device has three basic elements, namely, a pair of caps and a slip wrench/locking bar. In one embodiment, one of the caps includes an overpressure relief valve and an flame arrester. Each cap has a threaded base and a larger apertured cylindrical portion mounted thereon. Each cap has a closure gasket mounted at the shoulder formed between the base and the apertured cylinder which gasket permits partial rotation without unsealing the drum. The cylindrical portion of the outer wall has at least two pairs of elongated apertures with 180-degree spacing between the apertures of each pair.

Abstract: The invention consists of a liquid end for a plunger pump, having vertical inlet and outlet, with the suction and discharge valves readily accessible for maintenance without disturbig the suction and discharge piping. The liquid end also includes a relief valve which is accessible without disturbing suction or discharge piping. The passages to and from the relief valve are internal to the housing. Inserts are provided in the valves to eliminate dead space and to facilitate the removal of any trapped air which might adversely affect the performance of the pump.