Abstract: An improved pressure relief valve is disclosed which provides a simple inexpensive structure to exhaust a pressure filled bag, such as an airbag, in a controlled manner when the pressure in the bag exceeds a predetermined level.

Abstract: A pressure relief device is provided for pressurized containers to relieve excessive pressures from the container. The device includes a base mounted in one wall of the container. The base has a hole which is normally sealed by a sealing membrane, which is held in place by a sealing washer, an elastomeric element and a retention washer mounted within the cavity of the base. The elastomeric element allows the sealing membrane to yield from the hole when the pressure within the container increases to a predetermined cracking pressure, thereby providing communication between the interior of the container and the atmosphere for releasing pressure from the container. The pressure relief device can be assembled for various cracking pressures due to the elastomeric compression element.

Abstract: An apparatus for use in delivering fluid under pressure to a drain of a given diameter includes a bladder having an inlet end, an outlet end and an expandable wall having an outer diameter which is smaller than the given diameter of the drain when the bladder is unexpanded. The apparatus includes an orifice at the outlet end of the bladder and may be connected at its inlet to a fluid supply source which supplies fluid under pressure to the bladder. The diameter of the orifice is sized relative to the diameter of the inlet to cause a pressure build-up in the bladder sufficient to cause the expansion of the bladder when fluid is supplied to the bladder, and an inner member is provided for directing fluid flow radially outwardly within the bladder toward the expandable wall to facilitate the expansion of the bladder. The apparatus may alternatively be provided with valve means for covering the orifice when the wall is unexpanded and for uncovering the orifice as the wall is expanded.

Abstract: A medical guiding microtube in which at the tip of a synthetic resin tube a balloon having substantially the same outer diameter as said tube is attached and a ball-like body connecting at the tip of said tube through yarn in defined length is provided within the balloon having optionally a hole for leaking fluid, and it can be safely introduced to peripheral blood vessel and when used as leak balloon catheter it can control precisely and in good reproducibility a timing for leaking therapeutic liquid.

Abstract: The non-return valve in the air inlet of a pulsating burner includes a flat circular ring of elastic steel. The outer edge of the ring is provided between annular abutment surfaces with a predetermined play. The inner edge of the ring is movable from a closed position to a fully open position in which it has the shape of a truncated cone. The angle between the conical surface of the frustrum and its base is small in the fully open position, on the order of 3.degree., and resistance to opening is extremely small to permit rapid changes between the open and closed positions.

Abstract: A scotch yoke compressor assembly is disclosed wherein four radially disposed pistons reciprocate in cylinders defined in a crankcase. In a central portion of the crankcase, a scotch yoke mechanism operably couples the pistons to an eccentric portion on a rotating crankshaft. Each piston includes suction ports extending therethrough and a suction valve on the piston head. The suction valve is operably retained on a piston head and the piston is attached to a yoke member by a single bolt. The bolt head is received within a recess coined in a valve plate interposed between the crankcase and a cylinder head cover. Circularly arranged discharge ports in the valve plate are opened and closed by an annular discharge valve guidedly retained against the valve plate at diametrically opposed locations, by a combination of guide pins and an annular retainer member.

Abstract: A normally closed valve system for sealing off low pressure gas flow through a pipe. The valve comprises an inflatable bladder which blocks relatively low pressure flow through the pipe and permits relatively high pressure flow through the pipe. In one form, the invention comprises a fail-safe bypass monitor and method for measuring air inleakage in a steam turbine. The monitor selectably bypasses low volumetric flow rates from a pipe for measurement and admits flow through the pipe whenever the flow rate exceeds a predetermined value.

Abstract: A package (10) for dispensing a fluid (26) in the package under gas pressure has a biaxially oriented polyethelene terepthalate bottle (12) with a neck (14). A dispensing head (22) is attached to the neck (14). A normally closed valve (16) is mounted in the neck and has a housing (50) sealed to the inside surface of the neck (14). The housing (50) has a syphon flange (54). An integral structure (56) having a spring (58) at one end and a poppet (60) at a second end rests on the syphon flange (54). The housing has an opening (48) above the syphon flange 54). The integral structure (56) extends between the syphon flange (54) and the opening (48). The integral structure (56) is dimensioned so that the spring (58) is compressed to bias the poppet end of the integral structure (56) into sealing engagment around the opening (48). The dispensing head (22) has an integral diaphragm (42) and rods (52) and (46) extending above and below the diaphragm (42).

Abstract: A flow regulating device for gravity infusion and transfusion of fluids comprises upper and lower housing parts which include inflow and outflow channels respectively. A continuously adjustable valve is connected between the inflow and outflow channels. The outflow channel has an outlet opening which defines a valve seat and a membrane extends across the outlet opening and is movable toward and away from the outlet opening depending on pressure appearing on opposite sides of the membrane. In this way extraneous pressures, such as patient venous pressure, can be compensated for by the membrane to maintain a substantially constant flow of fluid once the valve is set.

Abstract: A valve for use in medical applications is disclosed which is a highly precise, passive, one-way valve which makes an excellent inlet valve or outlet valve in a drug infusion pump. The valve operates with a very small forward pressure, requires only a small amount of fluid in the valve chamber, and operates in a positive and predictable fashion, even after an extended shelf life. The valve, may be inexpensively molded in one piece, thereby facilitating construction of a disposable pump, and may be installed with the portion of the pump housing contacting the top surface of the valve being flat, thereby further reducing manufacturing costs.

Abstract: An improved type of valve in particular for air compressors is described. The main characteristic of the present invention lies in the fact that it includes a strip in which are formed two substantially U-shape slots passing therethrough, facing towards one another, which define a central portion, two intermediate portions constituted by a respective tongue fixed to a closure plate of a cylinder, and a perimetral portion. In the plate, in correspondence with the central portion and the perimetral portion, there are formed orifices for passage of a fluid, which orifices are alternatively closed or opened by the said central portion and perimetral portion.

Abstract: A hand-held dispenser for a flowable product capable of gassing, comprising a container having a neck part at its top, and a dispensing cap having a body part provided with a discharge opening. The cap-body and container-neck parts are cooperable to mount the cap on the container, and are constituted to form a cooperable automatic pressure-relief valving device which, in response to increased gas pressure in the container, vents a limited quantity of gas when the container is upright. This prevents expelling or splattering of the container contents. A first annular sealing surface on one part and a cooperable annular sealing surface on the other part effect a seal when the cap is fully seated on the container, and permit escape of gas when the cap is slightly unseated. A projection on one part is engageable with a projection on the other part to provide a biasing action which returns the cap to fully-seated position after the venting.

Abstract: A hydraulic control apparatus, more particularly for operating a motor vehicle clutch release mechanism, comprising a master cylinder, a slave cylinder and a conduit connecting the master cylinder to the slave cylinder. The apparatus is in the form of separate modular units which are separately, but simultaneously, filled with hydraulic fluid after simultaneous evacuation of atmospheric air from the apparatus modular units and test of the integrity of the modular units, and the pre-tested and prefilled modular units are shipped unconnected to a user.

Abstract: A hydraulic control apparatus, more particularly for operating a motor vehicle clutch release mechanism, comprising a master cylinder, a slave cylinder and a conduit connecting the master cylinder to the slave cylinder. A leakproof quick-connect connector is placed between the master cylinder and the slave cylinder, preferably at the end of the conduit where it connects to the master cylinder or the slave cylinder, one member of the connector forming part of the master cylinder or slave cylinder. The apparatus, after assembly, is filled with hydraulic fluid, the two members of the connector being held momentarily engaged. After filling, the connector is broken, and the filled components are shipped to a user. After installation of the apparatus for operation of a mechanism such as a clutch release mechanism, the two connector members are reconnected, and the connector members having been provided with a one-way locking member can no longer be separated such as to preserve the integrity of the system.

Abstract: A hydraulic control apparatus, more particularly for operating a motor vehicle clutch release mechanism, comprising a master cylinder, a slave cylinder and a conduit connecting the master cylinder to the slave cylinder. The apparatus is in the form of separate modular units which are separately filled with hydraulic fluid, and the filled modular units are shipped unconnected to a user. Each modular unit is provided with a leakproof quick-connect connector member, through which filling of the modular unit may be effected, and which mates with a complementary leakproof quick-connect connector member of another modular unit, such that after installation on a utiization device, a motor vehicle for example, complementary connector members are reconnected, thus opening ports in each connector member placing each member in fluid communication with the other. Preferably, the two connector members are provided with a one-way locking arrangement preventing separation of the connector members after coupling.

Abstract: A pumping apparatus for pumping heavy viscous chemicals and the like. The apparatus has a pump means having means for attachment to a container of the viscous chemicals and the like, and has driving means including a motor and means for detachably connecting the driving means to the pump means so that the pump means and driving means are separable, and the driving means may be used with other pump means.

Abstract: A low pressure back-check valve comprising a valve housing with a fluid inlet and outlet, a valve seat, and a dual disc valve element normally biased into closed position against the valve seat by mechanical support structure within the housing. One of the dual discs is made of pure gum rubber and/or like material, while the other disc is made of semi-rigid plastic material, such as unplasticized Polyvinyl Chloride (PVC). The mechanical support structure includes a pair of pins spaced 180.degree. apart. While these pins constantly hold the dual discs in biased position against the valve seat, because of the compliant construction of the dual discs, the valve can open under a very low pressure, such as 0.02 pounds per square inch.

Abstract: A ventilator device for allowing escape of air from enclosed spaces such as a building includes a unitary housing provided with an insert for controlling the flow of fluid therethrough. The insert comprises a pair of insulative, tubular sleeves between which there is sandwiched a flow control valve. The valve may include a fabric-like foraminous membrane which permits passage of moisture laden air outwardly through the ventilator but prevents moisture in the form of liquid or droplets from returning into the building through the ventilator. Alternatively, the valve may comprise a flexible member which deflects in response to a pressure differential within the housing to allow rapid escape of air from the roof to the surrounding environment.

Abstract: A dispensing pump of the pressure accumulating type includes an assembly of a pump body and a separate piston member, the body including a closure cap for securing the assembly in fluid tight communication with the opening of a container of flowable product to be dispensed, a plunger/accumulator forming a variable volume pump chamber together with the piston and being reciprocable relative thereto, and a plunger head surrounding the plunger. The plunger has a vent seal for opening and closing a vent chamber defined around the piston. The closure cap is of a hard and durable material, while the separate piston is softer and more compliant which gives its lip seal good definition which avoids pump chamber leakage as it precisely conforms to the inner diameter of the plunger and to any irregularities thereof.

Abstract: A two-cycle internal combustion engine having reed valves in the fuel/air supply system is provided with an element in the flow path of the fuel/air into the reed valves, which element is shaped and positioned to promote uniformity of flow of the fuel/air mixture in the flow passage.

Abstract: In a safety valve for a hermetically sealed container, which valve includes a carrier plate having a lateral edge flange for fastening the carrier plate to the container and presenting a shallow recess having a base provided with a central opening, a flexible diaphragm inserted in the recess and covering the central opening, and a viscous sealing agent interposed between the base of the recess and the diaphragm, a clamping member is disposed in the recess and provided with pressing jaws positioned to clamp an edge region of the diaphragm against the base of the recess.

Abstract: A variable capacity refrigeration system and a fluid flow control device particularly well suited for use therewith. The fluid flow control device includes a body, a Belleville spring, and a plug. The body defines a fluid flow passage, and the plug is secured therewithin. The Belleville spring is positioned within the fluid flow passage and includes an inside edge defining a radially extending spring port for conducting fluid through the spring. The Belleville spring has a normal position, where the inside edge of the spring engages the plug to close the spring port, and an overcenter position, where the inside edge of the spring is spaced from the plug to allow fluid flow through the spring port.

Abstract: A delivery valve assembly, especially for a rotary mechanism, such as a compressor, disposed within a valve chamber of a peripheral wall of a housing, which includes a stop disposed within the chamber, a valve seat formed in an end-wall disposed across an outer end of the chamber, and a movable valve element having an open and closed position. The valve element is generally rectangularly shaped in cross-section and comprises a resilient plannar inner portion disposed against the valve seat when it is closed and against the stop when opened. Springs, in the form of a pair of strips are fixedly attached at one end to the peripheral wall and extend across the outer end of the chamber, are attached at their other ends to the inner portion via a pair of side portions. These side portions are resilient and are in substantially opposed relationship.

Abstract: A valve apparatus is integrally molded from an elastomeric material so as to form a valve seating portion including a valve opening, a valve member and connective strands extending from the valve seating portion to the valve member. The valve member is initially molded on one side of the valve opening, and a portion of the valve member is passed through the opening to the other side thereof. The connective strands are stretched while passing a portion of the valve member through the opening so as to create a bias on the valve member which tends to seat the valve member on the other side of the opening.

Abstract: A flow control is provided between an inflatable and a smaller inflatable log which positions the inflatable with respect to the craft to which it is affixed. The flow control permits the inflation of the positioning log through the inflatable but restricts the flow of fluid back from the positioning log to the inflatable.

Abstract: A sewage aeration system comprising a header pipe, plenums of synthetic thermoplastic or thermoset resin with side walls inclined upwardly and outwardly to diffusion element support means, generally horizontal diffusion elements free of through-holes other than air diffusion pores, retaining means securing the elements about their peripheries to the plenums, sealing means adjacent the peripheries of the diffusion elements and airflow regulator members which terminate in the plenums beneath the horizontal diffusion elements.

Abstract: 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 or other compressible gaseous material is provided within the bladder at a pressure less than the supply liquid pressure, causing the bladder to be expanded to substantially fill the interior of the pipeline when it is emptied of liquid. When the connection between the liquid supply and lateral pipeline is open, the bladder is collapsed within the pipeline to permit passage of liquid to the outlets. When the connection is closed, the pressurized bladder is permitted to expand and thereby expel liquid remaining within the pipeline through the outlets. Longitudinally spaced compressible plugs are located between the outlets to prevent gravitational flow of liquid during draining of the pipeline.

Abstract: A sewer backflow preventer is adapted to fit on the top of a sewer cleanout pipe. The sewer backflow preventer has an upstanding pipe which attaches to the upper most end of the sewer cleanout pipe. Projecting radially from the top of the upstanding pipe are a series of rigid spokes which terminate at and attach to a ring. A cap having an impervious side wall and a top integrally formed with the side wall is attached to the ring near the bottom of the cap. Within the interior of the cap and attached between the ring and the bottom of the cap are a series of flexible rubber straps which radiate inwardly toward the center of the cap. Integrally formed with and attached at the ends of the straps is a half sphere. The convex surface of the sphere faces downward and mates with and reversibly seals the opening of the upstanding pipe. When sewage is backed up in the sewer, the half sphere lifts off the top of the upstanding pipe and allows the sewage to discharge to the ambient environment.

Abstract: A valve apparatus is integrally molded from an elastomeric material so as to form a valve seating portion including a valve opening, a valve member and connective strands extending from the valve seating portion to the valve member. The valve member is initially molded on one side of the valve opening, and a portion of the valve member is passed through the opening to the other side thereof. The connective strands are stretched while passing a portion of the valve member through the opening so as to create a bias on the valve member which tends to seat the valve member on the other side of the opening.

Abstract: 1. A sensitive blocking valve device comprising a casing, said casing comsing a pair of half-shell members each including a mating surface at the outer periphery and each having an axial valve seat portion projecting into the interior of said casing and in mutual alignment, an axial orifice through the valve seat portion of each half-shell member, a metallic valve wafer comprising a central valving portion disposed to move to close either of said orifices in said valve seat portions of the casing and having an integral double spiral flat spring formed integrally therewith and extending from said central portion, and an annular portion at the outer periphery of said double spring and formed integrally therewith, said annular portion being disposed in clamped relation between said half-shell members, said wafer including said double flat spring and annular portion all being of the same uniform thickness and planar when the valve device is unoperated.

Abstract: An occupant restraint cushion made of a single sheet of woven material and having an upper compartment that is adapted to engage the windshield of a vehicle and be guided thereby rearwardly when deployed so that subsequently a lower compartment extends downwardly from the upper compartment and is inflated in a position between the driver and the steering wheel.

Abstract: An improved plug valve is of the type that includes a valve body having a bore extending therethrough and a pair of passages intersecting the bore and being substantially normal to the axis of the bore. A valve plug is disposed within the bore for selective rotation between an opened and a closed position to respectively align and misalign a port through the plug with the passages. A first circumferential sealing member between the plug and the bore above the port and the passages and a second circumferential sealing member between the plug and the bore below the port prevents fluid from escaping from an interior of the plug valve and balances fluid pressure acting on the plug. The improvements include providing opposed circumferential semi-circular grooves respectively on the bore and the plug to define a circumferential channel therebetween. The body includes a circular hole extending therethrough which is tangentially aligned with the channel.

Abstract: A temperature insensitive, low cost, pressure regulating and remotely flushable emitter for drip irrigation systems comprises a nodal body insertable into the wall of a pipe and having an end face aperture in which a deflectable resilient element responds to interior water pressure changes. The resilient element is deflectable normally to the plane of the end face, and provides at least one edge surface in facing, shearing relation to the end face aperture wall. In a first mode, one or more slit apertures decrease in area in response to increases in interior water pressure within a nominal operating range. When the pressure is raised further, however, the resilient element is deflected across the end face aperture wall, to define at least one slit aperture providing a low volume but high velocity flow which creates a flushing or cleaning action.

Abstract: A valve arrangement adapted for use in a shock absorber, for example of the type employed in motor vehicles. The valve includes a valve seat and at least two disk springs. A first disk spring is clamped in the region of a first radial edge and extends in the radial direction toward the valve seat. However, its second, free radial edge terminates before reaching the valve seat. A second disk spring is held in the region of its own first radial edge against the pressure of the fluid medium only at the region of the second radial edge of the first disk spring. The second disk spring extends in the radial direction toward the valve seat such that its other, second radial edge extends over the valve seat and lies in contact therewith when the valve is closed.

Abstract: A fluid flow measuring apparatus characterized by a low friction piston and seal construction which is operable at low differential pressures. The piston and seal construction is further characterized by a bi-directional pressure relief feature that eliminates the possibility of flow blockage in the fluid system in which the apparatus is operating.

Abstract: The invention essentially comprises a compressor valve wherein the area of the tapered port in the inlet seat is larger than the area of the exhaust ports in the plate and guard. In addition, the exhaust ports are formed in the plate and guard around the respective inlet ports in the form of a staggered annulus. The larger open area in the seat enables the plate to be opened with lower pressure and the staggered annulus configuration produces substantially more open area through the valve for reduced plate lift and improved breathing.There is also disclosed a second embodiment of the invention which utilizes tabs for aligning and guiding a movable and flexible disc between the seat and guard without the use of alignment pins and valve springs.