Abstract: An overfill preventing device in an underground liquid storage tank is characterized in that a window for extending outwardly or accommodating a float is provided on a peripheral wall of a cylindrical sleeve, that an upper end of the float is pivotally attached to the cylindrical sleeve at a position above the window, and that a closure valve is mounted on the upper end of the float to open or close the cylindrical sleeve at a position above the window. Since the window for extending the float outwardly or accommodating the float inwardly is formed inside the cylindrical sleeve, the float can be firmly stored. When the float is extended outwardly from the cylindrical sleeve after installing the device of the present invention, the window is closed by a lid and the lid forms a part of the cylindrical sleeve so that construction of the space within the cylindrical sleeve necessary for liquid flow is minimized, whereby liquid is smoothly supplied into the underground liquid storage tank.

Abstract: This invention relates to a facility for storage of liquids, and more specifically, a leak detection system for an automotive service station. This system consists of a plurality of tanks provided with pipelines. This tank system is stored in a multi-walled vault or containment box. The pump lines are surrounded or contained with return spill casings. If a leak occurs in the lines, the gasoline flows by gravity to a separate service chamber. In this rectangular service chamber, the leak can be visibly observed from a top view by a service station attendant and should a pipeline require replacement, it is readily withdrawn from its casing and replaced, without any excavation.

Abstract: A plumbing fixture that is recessed in a wall and that has a part projecting through a hole in the wall is provided with an escutcheon having a main plate shaped to fit around the part flatly against the wall and to cover the hole, at least one fastener engageable through the main plate with the fixture to press the plate against the wall, a cover plate fittable on the main plate over the fastener, and formations integrally formed with the plates and securing the plates together. The main plate has an outer periphery provided with a soft seal ring engaging the wall. In addition the main plate has inward of its outer periphery a central recess in which the cover plate is received. The formations include pins unitarily formed on the cover plate and complementary seats unitarily formed in the main plate.

Abstract: The fast response control valve employs two diaphragms (24, 26) joined to a common valve body (28) in a configuration which employs pressure acting on the larger diaphragm to ensure valve seating. The smaller diaphragm isolates the larger diaphragm from the fluid pressure reservoir. An electrical solenoid valve (40) toggles between a first state which supplies pressure to the larger diaphragm causing the valve to seat and a second state which vents the pressure acting on the large diaphragm allowing the valve body to unseat. If desired, the solenoid may be operated using a variable duty cycle drive signal (52) to control the response characteristics of the diaphragm valve.

Abstract: The body (1) of a valve of the invention is welded in the bottom vat (2) in which it constitutes a controlled orifice (5), which orifice is closable by means of a resilient membrane (3) driven by means of a control wheel (11). A complementary orifice (6) is provided at the lowest point of the internal cavity (8) in the valve body to enable the cavity (8) to be emptied completely under gravity. A duct (7) separate from the complementary orifice and open to an internal cavity enables the cavity (8) to be sterilized continuously. The invention is particularly applicable to the food industry.

Abstract: The overfill device comprises a body (6), a flap valve (7) mounted in the body, a float (8) connected by a lever (9) to the valve, a plunger tube (10) connected to the body (6) and provided with an aperture (11), characterized in that an elastically deformable closure member (13) is mounted in the plunger tube and is applicable against the inner surface parts of the tube located on each side of the aperture by the effect of its own resilience and thereby closes the aperture when the float is located outside the plunger tube. Applications in tanks storing liquid products such as hydrocarbons.

Abstract: A valve comprises a valve obturator cooperating with a valve seat provided with crenellations disposed around the part of the valve seat on which the valve obturator rests. Each crenellation comprises on its surface facing the valve obturator a vertical central partition between two symmetrical openings.

Abstract: A pilot operated electromagnetically actuated valve having a flexible diaphragm main valve operator with a rigid insert forming the pilot valve seat and passage. The pilot valving chamber cover serves as an armature pilot valve guide and also has plural spaced ribs engaging and guiding movement of the rigid insert and pilot valve seat. A separate inlet passage having an annular filter formed by circumferentially spaced grooves and a resilient flange provided on a disc member inserted in the valve inlet flow to a remote pilot bleed hole in the cover for supplying the pilot valving chamber.

Abstract: A tube coupler of this invention, is provided with a plug and a socket each having a fluid passage and a valve. When the plug and the socket are connected together, they push each other to cause the fluid passage of the plug to communicate with the fluid passage of the socket. The socket has a main socket tube body comprising an inner tube and an outer tube provided separately and threadably engaging each other. The plug has a main plug tube body insertable between the inner and outer tubes. The tube coupler has a seal member mounted on the outer peripheral surface of the inner tube of the main socket tube body for sealing a gap between the outer peripheral surface of the main socket tube body and the inner peripheral face of the main plug tube body.

Abstract: For connecting an air compressor to a pneumatic tool, a revolvable quick coupling comprising a first air pipe connector revolvably secured to an intermediate connecting member by a ball bearing means and connected to an air output pipe of an air compressor, a second air pipe connector secured to said intermediate connecting member by a front socket, a retainer, an inner socket, a seal ring, a stepped metal element and a spring means for connecting to an air input pipe of a pneumatic tool. Pressing on the retainer causes the second air pipe connector to disconnect from the front socket and simultaneously causes said seal ring to seal the air passage inside the coupling. Rotating the pneumatic tool causes the second air pipe connector to rotate on the first air pipe connector without twisting the air output pipe of the air compressor.

Abstract: A self-locking valve spring retainer (30) operatively retaining a return spring (28) on the stem (20) of a poppet valve (16) comprises an annular base ring (48) from which three flexible arms (52) upwardly extend. A pair of axially spaced locking steps (66, 68) project radially inwardly from each of the arms (52) to provide barbed engaging ledges (74, 76) which interlock with a correspondingly shaped valve stem (20). An annular waisted hinge (86) is formed between the three arms (52) and the base ring (48) to ease stresses on the retainer (30) as the arms (52) are blossomed outwardly during installation and removal. A metallic anti-wear plate (88) is secured to the top of each arm (52). An installation and removal tool (92) for the retainer (30) comprises three wedge-shaped prongs (98) insertable within the three expansion slots (54) separating the three arms (52) for blossoming the retainer (30) prior to insertion and removal.

Abstract: A metering valve for water faucet that is triggered at the water discharge by a light touch on the trip stem so that the hand that triggers the valve is ready at the washing position at the start of the water flow. The disclosed metering valve consists of a trip stem which penetrates through the valve outlet port to the exterior of the valve. There is a pressure chamber wherein the pressure controls the open and closure of the valve. The pressure in the pressure chamber is determined by means of feed and bleed. In the closure mode the bleed opening is blocked and the pressure chamber is pressurized by the water supply through the feed. A light touch on the trip stem causes the bleed to open and a depressurization in the pressure chamber. This opens the valve and starts a metering cycle. After the trip stem is release, the bleed is blocked again and the pressure chamber starts to recover its pressure slowly through the feed flow path.

Abstract: A system for pumping down pressurized gas residing after shut-off in the piping use to provide a gas flow to facilitate backside wafer heating/cooling during the processing of a semiconductor wafer and including a valve selectable secondary piping line for equalizing on shutoff any pressure differential occurring in the primary gas flow line between the process chamber and the backside heating element. The secondary line runs from an opening in the process chamber wall to a tee-joint installed in the primary flow line immediately downstream of the final isolation valve in the primary line. A valve is installed in the secondary line and is operationally interlocked, in an inverse manner, with the isolation valve in the primary line such that when one valve is open the other valve is closed and vice versa.

Abstract: An exhaust gas recirculation valve assembly for controlling the recirculation of exhaust gas in an internal combustion engine having a base with an exhaust gas chamber formed therein, a valve assembly having a valve member mounted within the exhaust gas chamber for metering the flow of exhaust gas therethrough, and a valve stem extending out of the chamber through an opening therein, a one piece bearing having upper, intermediate, and lower bearing members for precise positioning of the valve member within the exhaust gas chamber, and a valve stem support assembly for mounting the valve stem relative to an actuator. The intermediate and upper bearing portions operate to deflect exhaust gas, escaping from the exhaust gas chamber and traveling along the valve stem of the valve member, from impinging on the actuator.

Abstract: A heat transfer hinge; a first rotor; a second rotor; a pivot means for pivotally coupling the first rotor to the second rotor, each rotor being free to pivot on a pivot axis passing between the first and second rotor; a means for thermally coupling a thermally conductive flat surface to the first rotor, the flat surface being positioned to be normal to the pivot axis; a means for thermally coupling a thermally conductive flat surface to the second rotor, the flat surface being positioned to be normal to the pivot axis; and, a means for holding the first rotor flat surface against the second rotor flat surface as the first rotor is pivoted on the pivot axis with respect to the second rotor.

Abstract: The invention provides a valve which comprises a body defining a passageway therethrough, a valve seat in the passage, a valve closure disposed in the passageway adjacent the valve seat, and an operating spindle projecting transversely into the passageway, the arrangement being one wherein movement of the spindle into the passageway causes the closure to be urged against the valve seat to close the valve, and movement of the spindle in a direction out of the passageway permits movement of the closure away from the seat to open the valve, the operating spindle being coupled to the closure by means of an intermediate articulated arm or roller.

Abstract: The present invention provides a fuel tank comprising a generally planar fuel tank bottom and upstanding wall on the fuel tank bottom. A passage within the wall has a throat area for admitting fuel to the reservoir. A baffle attached to the wall and placed adjacent the throat area deflects fuel away from the passage. The reservoir is designed to contain a first minimum quantity of fuel when the vehicle is approximately level and a second minimum quantity of fuel when the vehicle is inclined, the second quantity of fuel being roughly one-third the first minimum quantity of fuel. The reservoir acts to confine fuel within an area to be withdrawn by a fuel pump or pick-up nozzle and supplied to an engine.

Abstract: A heat exchanger includes a pair of header pipes and tubes disposed between the header pipes. Each tube is connected to the header pipes at its end portions. Each of the header pipes comprises a tubular member and a connecting plate. The tubular member defines an opening which is formed at a position in the circumferential direction of the tubular member and extends in the longitudinal direction of the tubular member. The connecting plate is installed in the defined opening of the tubular member and has a plurality of holes for inserting the end portions of the tubes therein to connect the tubes to each header pipe. The connecting plate is formed as a simple shape, and the plurality of holes are easily and precisely processed. Therefore, the tubes can be easily and efficiently connected to the header pipes and the header pipes can be inexpensively manufactured.

Abstract: The device comprises an assembly intended to be mounted on a closure valve of a high pressure container and comprises a manual control device operating a distribution valve in which the upstream end communicates with the closure valve, a pressure reducer and a safety device against over pressures between the distribution valve and an outlet for connection to a user circuit, as well as a manometer which measures the pressure upstream of the distribution valve. A pusher-rod operates the valve of the closure valve in response to a movement of the distribution valve.

Abstract: A valve arrangement for a pressure fluid, particularly high-pressure oil, has a valve housing (10, 90, 190) with an internal, cylindrical sealing surface (16, 100, 160) which forms a guide for the outer, cylindrical sealing surface (42, 107, 162) of a piston body (18, 106, 138). There is provided a circular groove which accommodates a sealing ring (46, 64, 108, 164). An axially displaceable valve sleeve (30, 70, 122, 156) is disposed coaxially with the two cylindrical sealing surfaces(16, 42, 100, 107, 162, 160) and has a cylindrical valve-sealing surface (40, 74, 124, 158). This valve sleeve is biased by a spring (34, 80, 118, 172) such that one end (36, 82, 126, 174) abuts substantially sealingly a seating (38, 86, 128, 176) at that end of the sealing surface such as to form a closed gap (41, 86, 130, 178) at one end of a channel (32, 73, 132, 145).