Abstract: A gas tank on-off switch structure includes a main body and a leakproof member which is structurally independent of the main body and is detachably fastened to the main body. The main body is connected with the interior of the gas tank. The leakproof member is formed of a fastening body, an elastic member, a plug, and a locating body. The fastening body is fastened to the main body and a gas pipe connector. The elastic element and the plug are located in the fastening body in conjunction with the locating body. The plug serves to prevent the gas leak in conjunction with the elastic element.

Abstract: A technique of assembling a solenoid operated valve to a hydraulic manifold in which the manifold has provided thereon undercut stanchions disposed on opposite sides of a cavity communicating with fluid valving passages. A U-shaped bracket with a central aperture is received over the solenoid and a first pair of tabs which engage lugs disposed respectively on opposite sides of the valve body function to prevent relative rotation between the bracket and valve. The bracket has a pair of oppositely extending resiliently deflectable spring arms each having a pair of second tabs thereon; and, the spring arms are deflected on the stanchions upon user insertion of the valve body into the cavity. The spring arms resiliently engage the undercuts to prevent removal of the valve, and the second tabs engage the sides of the stanchions to prevent relative rotation of the bracket and valve.

Abstract: A fluid handling assembly that includes a modular strut removably secured to a valve that permits easy access to internal valve parts for repair and inspection.

Abstract: A backflow prevention apparatus has a housing with an opening having a predetermined length. A first valve body, and a second valve body may be slidably sealed with one another, and compressed such that their combined length is less then the length of the opening. In the compressed state the valve bodies may be inserted within the opening of the housing and then elongated such that the ends of valve bodies engage and sliding seal with segments of the housing. A spacer may be placed between the first valve body and the second valve body to secure them within the opening. An intermediate valve body may be introduced between the first valve body and the second valve body.

Abstract: An expansion valve 1 comprises a piping member 10 equipped with passages to which refrigerant pipes are connected, and a cassette unit 100, the two members being formed as separate units. The cassette unit 100 comprises a tube member 110 having a flange portion 111, and at the interior of the tube member 110 are fixed a guide member 170, an orifice member 180, and a plate member 166. The pressure of the gas filled in a gas charge chamber 122 defined by a lid 120 and a diaphragm 130 displaces the diaphragm 130, the displacement being transmitted through a stopper member 140 to a shaft member 150. The shaft member 150 is guided by a guide member 170 and controls the valve means 160 inside a valve chamber 161. The cassette unit 100 is inserted to the piping member 10 and fixed to position by a ring 50. Seal members 62, 64, and 66 are equipped to appropriate areas between the cassette unit and the piping member.

Abstract: To provide an expansion valve which permits both the assembling cost and the cost of parts to be effectively reduced by a large margin and thus is highly economical. A high-pressure refrigerant pipe, a valve casing and a low-pressure refrigerant pipe are previously formed integrally with an evaporator. At the time of assembling, an expansion valve unit having a minimum function to serve as an expansion valve is inserted into the valve casing and fixed thereto by a clip, and a distal end portion of a temperature sensing cylinder is fixed to an outlet pipe of the evaporator, thereby constructing an expansion valve. No special joints are required to connect the expansion valve unit to the high-pressure and low-pressure refrigerant pipes, and therefore, the cost of parts can be cut down.

Abstract: A dual control assembly for a shower fitting comprising a thermostatic valve in the form of a cartridge removably fitted in the mixing chamber of the fitting, and a flow rate valve, the two valves being operatively linked or coupled together, for example by a sleeve. The valves are co-axially aligned and provided with respective control knobs which are disposed at the same end of the shower fitting.

Abstract: A cartridge valve includes a body element adapted for mounting to a panel by jam nuts and including a chamber adapted to receive a core element, the chamber and core element being constructed and arranged to effect a bayonet-type connection, whereby the core element may be selectively installed or removed from the chamber without tools by means of sequential axial and radial manipulations of the core element with respect to the valve body.

Abstract: A new architecture for packaging surface micromachined electro-microfluidic devices is presented. This architecture relies on two scales of packaging to bring fluid to the device scale (picoliters) from the macro-scale (microliters). The architecture emulates and utilizes electronics packaging technology. The larger package consists of a circuit board with embedded fluidic channels and standard fluidic connectors (e.g. Fluidic Printed Wiring Board). The embedded channels connect to the smaller package, an Electro-Microfluidic Dual-Inline-Package (EMDIP) that takes fluid to the microfluidic integrated circuit (MIC). The fluidic connection is made to the back of the MIC through Bosch-etched holes that take fluid to surface micromachined channels on the front of the MIC. Electrical connection is made to bond pads on the front of the MIC.

Abstract: An inline check valve having a piston member and a seat in a valve body having a larger diameter at the end thereof away from the piston. The seat is retained within a groove by a seat retainer which prevents removal of the seat from the groove without deformation of the seat.

Abstract: A fluid pressure reduction system (1) formed from at least a first module (10) and a second module (20) cooperating with each other in order to ensure at least expansion of the fluid and able to be connected to and/or disconnected from each other, the connection of the modules (10, 20) with each other being provided by connection elements (11, 21, 22) with a rotary ring (21) carried by the first module (10) and/or the second module (20). Such a system may be fitted to any fluid line, especially a medical gas line.

Abstract: A solenoid valve is mounted in the bore of a ferromagnetic journal. Mounting the solenoid valve in the journal conserves space on the firewall of a vehicle where the solenoid is typically located. Journal mounting also minimizes the length of the air line necessary to supply air to the solenoid valve. Use of a ferromagnetic journal as part of the magnetic circuit allows full use of the journal bore for the components of the solenoid valve. A leak vent path is provided as well as a principal vent path in the flux flanges of the solenoid valve. The solenoid valve controls the flow of air through a seal which engages a rotating coupling of a clutch which operates a fan.

Abstract: A flow-through pipe plug for conduits which permits controlled blockage of fluid flow in a conduit in which the plug is installed, the plug having a rigid cylindrical core on which are secured an outer bladder and an inner bladder, the bladders and core forming chambers between the bladders and the core, the core having pressurizable fluid supply pipes to the chambers with hose connectors for connecting the supply pipes to an auxiliary component for independent pressurization of the chambers and expansion of the respective bladders with the outer bladder expanding to the inner wall of the conduit in which it is installed and the inner bladder expanding to block passage through the core.

Abstract: An air conditioning charging valve includes a valve body that receives a valve element in an interference fit. The valve element is slideable by a charging tool from an opened positioned, in which a refrigerant fluid may be charged into an air conditioning system via the charge valve, and a closed position, in which the valve element forms a leak free, metal-to-metal seal against a valve seat carried by the valve body.

Abstract: A variable orifice valve for controlling fluid flow in a conduit, comprising a band or other movable members defining an opening for passing the fluid therethrough, the band mounted transverse to the direction of fluid flow in the conduit, so that the band opening is at least partially in the conduit. The band is movable relative to the conduit, to change the amount of the opening exposed to fluid flow.

Abstract: A ball valve includes a bonnet and a removable insert in which a valve ball and opposed seat rings are contained within a cartridge of separable shells. Cylindrical spring seals of resilient and impervious high density graphite or silicon ruber are mounted on a reduced diameter length of each seat ring. Other embodiments include annular coil springs which compensate for component wear, and contraction and expansion due to changes in temperature. The spring seals are compressed between shoulders on the seat rings and a facing annular recessed surfaces in the cartridge and urge the seat rings into dynamic sealing contact with the valve ball. The spring seals also provide static sealing at the interface of the seat rings and the cartridge. Connecting fittings on mating surfaces of the bonnet and the insert enable the insert to be completely removed from the valve body for easy access for repair or replacement of components within the cartridge.

Abstract: An improved floor drain for buildings, basements, exterior paved areas, and the like. The invention provides floor drain assemblies and check valves providing improved drainage performance, particularly where drainage is an irregular occurrence, and having unprecedented simplicity and reliability. Floor drains according to the invention comprise check valves adapted for disposition within floor drains, the check valves generally comprising spring-loaded stops or elastic diaphragms, either of which may be tailored for opening under a selected hydrostatic pressure. Use of the check valves according to the invention permits drainage through the drain conduit while preventing back flow from the drain of undesirable or unwanted gasses. Check valves according to the invention are preferably installable in existing drain structures, and easily removable for maintenance or replacement.

Abstract: A double check valve backflow prevention apparatus of lightweight modular construction. The apparatus comprises a primary housing component having a flangeless lateral opening, a first check valve module which fits within the lateral opening a second check valve module which also fits within the lateral opening a central housing component, with the central housing fitting within the lateral opening between the first check valve module and second check valve module. A first fluid tight seal is positioned between the first check valve module and central housing component, and a second fluid tight seal is positioned between the second check valve module and central housing component. A third fluid tight seal is positioned between the first check valve module and the primary housing component, and a fourth fluid tight seal is positioned between the second check valve module and the primary housing component.

Abstract: A check valve module includes a body having a first fluid communicating surface and a second fluid communicating surface, and two one-way check valves in the body controlling flow between the first and second surfaces. One of the valves permits flow from the first surface to the second surface, and the other valve permits flow from the second surface to the first surface. The body also has an outer sealing surface between the first and second fluid communicating surfaces.