Abstract: A heated, insulated cover for a portion of a pipeline with valve and backflow preventer components exposed to the atmosphere, the cover being sectionalized so as to be assemblable around the valve components, with hand manipulated clamps to hold the cover together, an electric heating element inside the cover to keep it above freezing temperature, drain openings in the cover at ground level to let any water drain out of the cover, doors in the cover to permit inspection and testing of the components when the cover is in place.

Abstract: A membrane for a mount having hydraulic damping action has a peripheral bead and opposite surfaces extending inwardly therefrom. A nonrectilinear cut through the opposite surfaces of the membrane from at least proximate the bead of the membrane delimits at least one tongue from the membrane which projects either centrally of the membrane or toward a thinner portion of the membrane. The mount for the membrane has working and equalizing spaces filled with an hydraulic fluid and arranged to vary in volume in response to relative movement between pedestal and mounting bracket portions of the mount. A throttle opening between the working and equalizing spaces throttles fluid flow therebetween in response to the pressure differential therebetween from the volume variation for hydraulic damping.

Abstract: A means of continuously pressurizing an air/fuel mixture residing within a crankcase of a two cycle internal combustion engine is disclosed. The crankshaft fitted flywheel or counterweight of the engine is mounted with a plurality of vanes which extend from a central region of the flywheel outward to the periphery of the flywheel. The vanes are positioned over the entire surface of the flywheel. A ducting channel which receives a air/fuel mixture charge from the carburetor directs that charge to the central region of the flywheel. In operation the crankshaft rotates the flywheel causing the fuel charge to be uniformly hurled outward from the central region to the periphery of the flywheel. The forces acting on the charge serves to compress the mixture within the crankcase. At low engine revolutions as well as for starting the engine the conventionally accepted use of one way reed valve induction is used.

Abstract: A quick disconnect coupling device for connecting the vertical pipe from a submersible pump in a sewage system to a horizontal pipe includes male and female coupling members. The female coupling member is connected to the horizontal pipe and is coupled to the male coupling member by guideways which are engaged by guide elements on the male coupling member. The male member includes a pair of coupling elements which are connected together to form a 90-degree coupling. A flap type check valve is clamped between the coupling elements of the male coupling member and permits the flow of waste water through the coupling, but prevents the return flow of waste water to the submersible pump.

Abstract: Reed valves for internal combustion engines are disclosed, the reed valves having protective coating of synthetic rubber.

Abstract: A valve for an ink jet printer is made by vacuum depositing, sputtering, and plating various layers of metal on a glass substrate. A photoresist and etch technique is used to form a window area in one of the layers and a fine slit for forming a tongue in another of the layers within the window area. When the window area is formed, an elongated projection remains in the window area to prevent the tongue from bending in one direction while enabling it to bend in an opposite direction. This way ink pressure on one side opens the valve and pressure on the opposite side choses the valve.

Abstract: A dispenser for liquid soap includes a compressible nipple having an annular flange mountable on a soap container in communication with the outlet opening thereof, and clamping therebetween a valve assembly including a slitted flexible diaphragm and a backing disc. The disc has a discharge opening in alignment with a check valve slit in the diaphragm for controlling discharge of soap into the nipple for dispensing upon compression of the nipple. The disc and the nipple flange respectively have annular grooves formed in the facing surfaces thereof, a vent valve slit in the diaphragm being aligned with these grooves. The flange groove communicates with the outside of the nipple through a vent opening and the disc groove communicates with the outlet opening of a container through a vent orifice in the disc.

Abstract: A reed valve for an internal combustion engine comprises an aperture closable by a resilient valve member composed of an epoxide resin laminate. The laminate preferably includes cotton.

Abstract: A suction valve for a small refrigeration compressor is in the form of a thin sheet metal reed having a sealing portion adapted to make sealing contact with a valve seat around the suction port on a valve plate. The valve reed is formed from a valve sheet by an outline defining cut so that the valve reed is integral with the sheet. The valve reed has a reduced width neck portion and in this neck portion the material is plastically deformed along a bend line so that in a normal unstressed condition the sealing portion of the reed is spaced away from the valve seat by a slight distance and as soon as the piston starts on the compression stroke the fluid pressure forces the sealing portion into sealing engagement to prevent back-flow through the suction port. When the piston starts the suction stroke, the biasing of the valve reed causes the sealing portion to move out of engagement with the valve seat before there is a substantial pressure differential across the suction valve.

Abstract: A molded case circuit breaker includes an improved system for venting gaseous arc products from the interior of the molded case to the exterior thereof and for preventing the ingress of environmental contaminants. At least one slot is formed through the molded case and a one-way, resilient valve is disposed within the slot.

Abstract: A sump pump assembly having a primary sump pump and a secondary sump pump and including a T-fitting for connecting together the outlets of the primary sump pump and the secondary sump pump to a common exhaust. The T-fitting contains a one-way valve on the secondary pump outlet connection and a fastening means for a water level sensing device.

Abstract: The invention pertains to a lightweight and concise vaccum pump particularly suitable for servicing refrigeration systems. One end of a cylindrical electric motor casing is enclosed by a substantially cylindrical adapter upon which a pump assembly is mounted. The motor armature shaft extends through the adapter and the pump rotor is directly mounted thereon. A hollow shell affixed to the adapter encompasses the pump assembly defining a chamber thereabout which includes a lubrication sump. A synthetic plastic handle assembly attaches to the motor casing and includes a capacitor housing and a base is affixed to the lower side of the casing. Except for the handle and base the pump is of a substantially cylindrical configuration of a diameter similar to that of the motor casing, and the pump assembly includes lubrication and exhaust features which provide improved pumping conditions.

Abstract: A valve for sealing closed the fluid supply orifice in a sprinkler head body, comprising a sealing plug having a projection extending axially towards the supply orifice when assembled on the body, a resilient membrane having an annular portion captured over the projection and for compression between the plug and the body to seal the supply orifice, and a tail portion attachable to the body, whereby upon jettisoning of the plug with opening of the supply orifice the plug remains attached to the body by the tail portion at least until the plug is clear of the fluid jet issuing from the orifice.

Abstract: A system for controlling the flow of liquid between a reservoir and a liquid source. Passageways are provided between the reservoir and the source for the flow of liquid therebetween. Selectively operable valves, including automatic check valves, are disclosed in various forms of the invention for actuation between a first position for filling the reservoir with liquid from the source and a second position for emptying liquid from the reservoir to the source. The automatic valves prevent the flow of liquid from the reservoir to the source when in the first, filling position and allow the flow of liquid from the reservoir to the source when in the second, emptying position.

Abstract: In a miniature valve, a valve seat is formed by aperturing a plate. A cantilever leaf spring is disposed overlying the apertured plate for controlling the flow of fluid therethrough. An electrostatic potential applied between the cantilever leaf spring and the valve plate pulls the leaf spring over the apertured plate for variably controlling flow through the valve in accordance with the magnitude of the applied potential. In a preferred embodiment, the cantilever leaf springs are made in batch form by etching a silicon wafer. A flow controller is provided by measuring the electrical capacitance of the valve, comparing it with a reference voltage and deriving a feedback voltage applied to the valve for controlling flow therethrough. In one embodiment, the width of the cantilever leaf spring valve member is narrowed toward its free end for finer control of flow.

Abstract: An intake valve apparatus for an air pump having a cylinder with a cylinder iner, a piston positioned within the cylinder liner, a cylinder head and an intake valve. The intake valve comprises an upper annular valve plate having a reed extending inwardly therein and a lower seat plate having an opening facing the reed, the valve plate and seat plate being held between mating surfaces of the cylinder liner and the cylinder head and wherein the reed is positioned for movement in the seat place.

Abstract: In addition to oxygen concentrator apparatus utilizing two zeolite beds and alternating, pressure controlled pressurization and exhaust cycles, with a swash plate cylindrical pump having a pressure sensitive idle mode, improved oxygen concentrator apparatus is also disclosed. The improved oxygen concentrator apparatus has an isothermal, high volume, low pressure air flow system with unrestricted air conducting lines and ports throughout for more efficient and effective oxygen production. It includes a unique rotary vane pump designed for essentially isothermal air pumping and has precision collet mounted rotor with centering apparatus, tapered vanes for reduced wear and erosion, and combination cast iron pump chamber liner with external aluminum finned casing to enhance both durability and heat dissipation. It also includes a combination double one-way and balancer valve for controlling the flow of oxygen-enriched air downstream from the zeolite beds.

Abstract: This invention relates to an improved fluid pump. The pump is of the type, wherein a reciprocating motor acts in concert with supply and exhaust valves to pump fluid from a source to its destination. In the preferred embodiment, the motor comprises a reciprocating diaphragm and the supply and exhaust valves comprise a single resilient plate with individual valve members formed as cutouts therein. The valve plate is sandwiched between two plates which form the associated porting. The interaction between the various ports on the valve plates results in improved sealing effect for the valves.

Abstract: A pressure relief port for relieving the pressure within an enclosure having a wall with first and second sides and a first opening therethrough. The pressure relief port includes a tube having a conduit therethrough sized to fit in the first opening in the wall to extend essentially intermediate the first and second sides of the wall. First and second end caps having respective openings therein are sized to fit on the first and second walls respectively, about the first opening. The tube extends into the first and second end caps. A flexible diaphragm extends substantially across the conduit in the tube for regulating air flow and is displaceable between a first position where the diaphragm substantially closes off the conduit to air flow and a second position where the diaphragm is displaced by air pressure to permit air to flow through the conduit to equalize pressure on opposite sides of the wall.

Abstract: A Marine Jet Propulsion System for use as an inboard engine for boats is herein described. An engine or motor means is attached in a driving relationship to a pump and thrust output apparatus. Heat generated by and rejected by the engine or motor is passed into the pump base for dissipation into the outputted jet thrust stream. Air and/or exhaust gas from the engine is ejected around the jet output stream to reduce against-the-hull turbulence and jet stream or thrust energy losses. Streamlining hull closures for the jet pump intake and output ports are provided to reduce system hull drag when not in use and to limit marine organism growth inside the pump.

Abstract: An improved switching device for indicating the beginning and ending of the breath of a test subject. A flow through housing is provided with an inlet and first and second outlets. A flexible diaphragm is connected in series with the first outlet to serve as a check valve which opens during the high flow rate portion of a breath. A sensitive flow responsive member connected in series with the second outlet opens in response to the presence of gas flow during the low flow rate portion of the breath. A detecting circuit responsive to the position of the flow responsive member accurately signals the beginning and ending of a breath without interference by the check valve.

Abstract: A printer head, for an ink-on-demand type ink-jet printer, squirts ink droplets onto a printing medium. The printer head includes a nozzle for delivering the ink droplets and a passage for supplying ink from an ink tank. The ink is pressurized in accordance with an electric signal which commands the delivery of the ink droplets. Fluid control valves are deformed under the action of the ink pressure.

Abstract: A liquid drainage system comprising, a receptacle having a chamber to receive and collect the liquid. The system has a drip chamber having a vent with a bacteria filter covering the vent, and an annular wall having a lower edge defining a valve seat, with the seat being disposed at an acute angle relative to the horizontal when the receptacle is in an upright position. The system has an anti-reflux valve comprising a sheet of flexible material extending across the drip chamber such that the sheet is sufficiently large to engage against the seat peripherally around the drip chamber. The system has a device for retaining an upper portion of the valve against an upper portion of the seat, such that a lower portion of the valve flexes away from the seat when the receptacle is placed in an upright position, and the lower portion of the valve flexes against the seat when the receptacle is disposed in a horizontal position.

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: An improved switching device for indicating the beginning and ending of the breath of a test subject. A flow through housing is provided with an inlet and first and second outlets. A flexible diaphragm is connected in series with the first outlet to serve as a check valve which opens during the high flow rate portion of a breath. A sensitive flow responsive member connected in series with the second outlet opens in response to the presence of gas flow during the low flow rate portion of the breath. A detecting circuit responsive to the position of the flow responsive member accurately signals the beginning and ending of a breath. A damping member connected to the flexible diaphragm prevents the latter from vibrating at low breath flow rates and thereby stabilizes the motion of the flow responsive member.

Abstract: A compensation control and blow-off valve unit in a quick take-up master cylinder. In one embodiment, a stamped valve body forms a valve member within a valve chamber which permits compensation flow from the master cylinder reservoir to the pressurizing chambers. It has an O-ring seal controlling a passage from the valve chamber to the reservoir which opens the passage at a predetermined quick take-up pressure to return fluid to the reservoir. Other embodiments use an umbrella valve or a spring biased ball check valve. The valve housing in some embodiments also retains the reservoir housing in sealed position on the master cylinder housing.

Abstract: A check valve for a drop-on-demand pressure pulse ejector for preventing pressure pulse loss to the liquid supply system. The check valve is made by electrodeposition onto the surface of a substrate.

Abstract: A relief-vent device to be employed in combination with pressure-release valves associated with high-pressure gas-storage tanks, such as LPG storage tanks that are mounted to vehicles for which such gas is employed as a means for fuel. The vent device is normally required to be located remotely from the storage tank, and to be mounted for vertical discharge or at an angle not exceeding 45.degree. thereto, the vent body being formed having an annular recess to receive a flexible vent cover that is secured along one edge thereof within the recess, whereby the outlet formed in the body is closed so as to be sealed until gas is released from the tank for discharge to the atmosphere.

Abstract: The invention relates to an improved shuttering device for preventing back-flow in air conduits or the like. The device includes an attachment section and a frame section, the latter being provided with a series of elastic lamellae shiftable between blocking and unblocking positions within the frame, the frame having in addition guide plates extending axially of the conduit to prevent transverse currents.

Abstract: A flexible, resilient anti-contamination baffle having a plurality of interleaved sheets of material. The sheets of material are secured at one end thereof to a surface adjacent an opening to be sealed and have the capability of not only substantially preventing the passage of gaseous contaminants through the opening when the regions adjacent the openings are of substantially the same pressures but also capable of allowing the rapid venting of gases from a region of higher pressure to a region of lower pressure. Additionally, the sheets of material are formed so as to provide a "breakaway capability" allowing the passing of an object through the opening without encompassing or entangling the object as it passes therethrough.

Abstract: A master cylinder assembly has a low pressure, high volume displacement quick take-up chamber and a high pressure, low volume displacement pressurizing chamber formed by a stepped bore and a stepped piston. A compensation control and blow-off valve unit has a peripheral lip seal type valve providing compensation flow on brake release but preventing flow from the quick take-up chamber during brake apply. A normally closed check valve can open to provide communication between the quick take-up pressurizing chamber and the fluid reservoir. When the pressurizing cup for the high pressure chamber closes its compensation port, the check valve is subjected to the pressure in the quick take-up pressurizing chamber. Initial fluid flow is obtained from the quick take-up chamber past the pressurizing cup into the high pressure chamber.

Abstract: A positive displacement pump for delivery of blood, or the like, from patients to an extracorporeal circuit, for purification, as in hemodialysis treatments. The pump is small, and sufficiently inexpensive to be discarded after one use. The pump comprises a single blood chamber attached to inlet and outlet conduits separated from the chamber and each other by low resistance flapper valves. The flapper valves are integral with a flexible diaphragm which forms one side of the blood chamber and are operative to close the outlet valve and to open the inlet valve to fill the blood cavity responsive to withdrawal of the diaphragm from the blood chamber cavity and to reverse each valve upon penetration of the diaphragm into the blood chamber to deliver uniformly small increments of blood to an artificial kidney or other blood treatment device.

Abstract: Insulin delivery system comprises insulin reservoir, pump and subcutaneous needle. Pump is electromechanically-driven at a preselectable fixed rate and can be additionally actuated to deliver a preprandial bolus of selected dosage.

Abstract: The invention relates to a valve for toy balloons, this valve opening inwardly under very minor excess pressure and yet providing a tight seal by means of an additional cap. A container surrounding the valve and flaring conically serves for introducing the valve into the balloon aperture without the need for a special mounting or sealing means. The container is sealed by a removable lid containing the cap and simultaneously making it possible to introduce an internal illumination for the balloon.

Abstract: A reed valve in the form of a plate fixed at one end and bendable into and out of contact with a valve seat is operated by differential pressures and acts as a check-valve. The reed valve has cavities in the surface thereof with unitary strengthening frame members separating these cavities. Specific patterns of cavities and frame members are employed to achieve the desired performance of the valve.

Abstract: In a reed valve of the type having a base formed with one or more apertures through which flows a fluid, a shock absorbing seat attached to the upper surface of the base so as to surround the one or more apertures at the inner peripheral edge thereof, and a reed having one end securely fixed to the base, whereby the reed is forced to move to seat on the seat, thereby closing the one or more apertures and to move away therefrom, thereby opening the one or more apertures, at least a portion of the inner peripheral edge of the seat which engages with the free end portion of the reed is spaced outwardly away from the upper edge of the aperture by a suitable distance and is beveled or curved.

Abstract: In a diaphragm device, a round diaphragm of flexible material comprising a rim clamped between and sealingly gasketing upper and lower housing members, a coaxial annular arched vault within and circumferentially continuously joined at its outer periphery to the rim and having an inner downwardly directed periphery connected to an obliquely downwardly-facing disk-shaped portion including a molded-in or otherwise incorporated shape-maintaining oblique core disk to afford an integral swingable shiftable portion useful as a valving member in a shutoff type actuated valve or a check valve, or as the operably shiftable main part of a pump diaphragm, for which examples are disclosed.

Abstract: A two-cycle internal combustion engine having reed-type intake valving, and especially configured and positioned intake and injector porting, with the porting constructed and arranged to improve various of the operating characteristics of the engine, and particularly adapted to increase the effectiveness of the injection through the injector porting.

Abstract: A fluid flow regulating valve is inserted in line with a fluid conducting medium to regulate the flow therethrough over a widely varying range of pressure differentials across the valve. The valve is constructed of a body portion having a fluid passageway therethrough terminating at one end in a land having an empirically derived, compound curved section. A compliant reed is affixed to the body portion adjacent the land and operates to press against and conform with the land in response to increasing fluid pressure differential across the reed whereby the rate of fluid flow through the valve remains substantially constant. In an alternative embodiment of the invention, a second similarly shaped land is provided adjacent the reed and opposite the other land to provide bidirectional flow control. The lands are integral portions of the body portion of the valve which is constructed of molded plastic or the like. The reed comprises thin metal shimstock or the like which has been heat staked to the body portion.

Abstract: A fuel supply system for an internal combustion engine having inlet porting and a fuel supply passage with valve means therein, the cross-sectional area lying within the outside passage walls being greater in the region of the valve means than in a region upstream of the valve means. Means are provided in the passage tending to equalize the velocity of the fuel flow through the supply passage in different regions thereof.

Abstract: A check valve is provided comprising a cap having an inlet port and a body with an internal recess whose periphery is engaged with the cap and contains an outlet port. A rib extends across the body recess and is supported and urged against the cap by the rib substantially along the entire length of the rib. The diaphragm is engaged against the cap to close the valve, with the peripheral edges of the diaphragm being adapted to bend away from the cap to open the valve when a predetermined fluid pressure is exerted at the inlet port.

Abstract: A prosthetic heart valve has a tubular valve housing, a suture ring, and a membrane-like gate supported within the housing. The flexible membrane is generally elliptical in shape and is fastened in the housing along half its periphery. Flexure of the membrane moves it between an open position which permits blood flow through the housing and a closed position which blocks the flow path of the housing.

Abstract: A deaerating valve for bagging fluidized pulverulent products into sacks of the open-mouth type. The valve includes a filtering sheet housed on the inside of the sack to be filled, this sheet having a texture and a thickness such that it multiplies the suction effect through the valve and plays the role of a "wick" to drain the air into a large space. The dimensions of the sheet are considerable with respect to those of the deaerating valve; its surface area may attain that of the flat spread-out sack. The invention is useful in the removal of air from impermeable bags designed to receive a micromized pulverulent product.

Abstract: A manually operable dispenser pump construction wherein liquid product is received from a supply container into an axially compressible bellows. The bellows in turn includes product discharge valve means associated therewith and adapted to move between open discharge and closed storage valve positions by movement of the bellows. In one form of the invention the product discharge valve valve includes a gooseneck portion integral with the bellows and which is moved out of closed position by said axial bellows compression. In another form the product discharge valve includes a generally circular gasket axially disposed between the bellows and its actuation means wherein said gasket is adapted to move into and out of sealing contact with a valve seat dependent on the compression of said bellows.

Abstract: In a valve where a port is opened and closed by movement of a lamina away from or towards the port, the lamina is held between two adjacent parts of the valve. To ensure that the lamina is held rigidly in place, it is provided with resiliently deformable projections on its side facing away from the port which it is to close.

Abstract: A valve element for a small sized air pump. The valve element has legs, each of which are tightly secured within holes of valve-beds of a valve casing. A longitudinal hole is formed within each of the legs. The hole of the leg is opened at one end and closed at the other such that the hole terminates at a level horizontal to the lower surface of the valve-beds when the valve element is assembled.

Abstract: There is disclosed herein a one-piece check valve for use in an applicator tip for fluid substances, or the like, comprises a reed portion and a valve seat portion and an interconnecting integral hinge section, permitting the respective portions to be folded over and engaged in superposed relation. Further, the valve includes a flange segment also preferably formed in halves adjacent the inlet sections of the reed and seat portions. The respective portions are molded as an integral unit, and upon assembly, the respective reed and valve seat portions are folded over at the hinge portion so that the reed portion seats on the seat provided by the valve seat portion, and the flange segment halves abut to form a valve inlet and an abutment shoulder extending outwardly of the inlet for engaging complimentary retaining shoulders, flanges or the like of the applicator or other fluid carrying device.

Abstract: A straightway valve for a positive-displacement machine comprises a polyhedral body with outlet ports and seat surfaces on the sides thereof, flat friction-free closure plates, and a means for attachment of the closure plates to the body, which takes the form of a polygon-shaped plate having on its ends clamping lugs for holding the closure plates in place on the seat surfaces of the body. The polygonal plate has, for example, a bore with projections formed around the periphery thereof and engaging a blind recess in the end face of the body, thus providing for a reliable and easily removable attachment of the plate to the valve body. The valve can serve as a suction and delivery valve in cylinders for compressors of any output with pressures of up to 1,500 kg/cm.sup.2 and with shaft rotational speeds of up to 3,000 revolutions per minute.

Abstract: Improved distribution device constituted by a base and a distributor associated therewith, having internal channels in which the pneumatic fluid circulates normally only in one direction. At least one of these channels possesses a non-return valve disposed near the surface connecting the base and the distributor, allowing the circulation of the fluid in the one, normal direction of circulation. The invention finds interesting application in the domain of pneumatic installations.

Abstract: A closing plate for a ring valve, in particular a suction or pressure valve of a piston compressor, which is intended to be arranged on a valve seat with arcuate-shaped through-flow passages and comprises at least one concentric ring and at least one concentric sectioned ring which control the through-flow passages, and at least one concentric ring and at least one concentric sectioned ring are connected with each other through radial arms. One of the rings is continuous and adapted to be clamped on the valve seat at at least two points, while at least one other ring is split by radial slits between the radial arms to form the at least one concentric sectioned ring.