Abstract: A ball valve is provided with an internal check valve which is of modular construction and with an external valve casing that includes a lateral extension defining an access port. The modular check valve assembly is threadably connected to the ball and the lateral extension is closed with a threadable closure. The threadable closure for the lateral extension and the threadable check valve assembly both have sockets to receive access tools and both sockets preferably have the same unique tamper proof configuration to receive the same access tool.

Abstract: A method and apparatus controls the flow rate of a fluid that flows through a fluid path including a resiliently deformable portion. A first roller has a cutout formed thereon on one side thereof, and a retainer is arranged in parallel with the first roller. The resiliently deformable portion of the fluid path is held between the first roller and the retainer. The first roller is rotatably supported by its rotary shaft. The first distance from the rotary shaft to the outer wall of the first roller on the side facing opposite the resiliently deformable portion may be varied in response to the variation in the angle that occurs when the first roller rotates about its rotary shaft.

Abstract: An improved heat transfer means provides for a dual corrugated fin material which improves heat transfer by increasing the surface area of the fin without a corresponding increase in volume. The improved heat transfer means comprises a fin generated from a flat sheet of metal. The fin includes a first corrugated pattern having a first height, and a second corrugated pattern having a second height, wherein the first pattern is integral in the second pattern and the first height is less than the second height.

Abstract: A radiator (3) is coupled by caulked joints with fitting plates (5, 15) fixed to the substrate (8) by soldering. By heat-conductively attaching the fitting plate (5, 15) to both sides of the radiator (3), apertures (7) for receiving a prying tool (6) are formed between the radiator (3) and the fitting plate (5, 15). The fitting plate (5, 15) is pried open by the typical tool, thereby the radiator (3) is easily separated from the substrate (8) in order to be used as recycling resources.

Abstract: An improved gate for a gate valve will allow shearing of a wireline extending through the gate valve while preserving post-shear seal integrity. The improved gate comprises an inlay of a hard ductile material such as Stellite along the shearing edge of the gate. The gate also comprises a coating of an extremely hard material such as tungsten carbide on the sealing surface of the gate. The invention also covers an improved gate seat. The improved seat also comprises an inlay of a hard ductile material such as Stellite along its shearing edge. The improved seat can also have a coating of an extremely hard material such as tungsten carbide on part of its sealing surface.

Abstract: A butterfly valve assembly of plastic material for use in a plastic piping system. The valve body is made from thermoplastic wherein the valve seat has a hard core of phenolic or another plastic and a resilient cover. The plastic valve body utilizes a retainer ring in its construction to maintain pressure on the valve seat which aids in sealing the valve closure thereagainst. The closure disc may be of metal or plastic depending on the service contemplated. The closure disc is retained in the valve body by a lower valve stem which is affixed in the valve body to permit free rotation of the closure disc thereon and an upper valve stem which includes a central retainer ring and is supported by a housing on the valve body. The housing has a bushing that seats against the retainer ring and a tubular plug which seats in the housing exerting pressure against the bushing, and thus, against the central retainer ring to assist in blow-out protection.

Abstract: The invention relates to a wedge guide for a gate valve which is able to be inserted into the housing of the gate valve. A readily replaceable wedge guide which is well adapted to the particular requirements has a tube part fitted with two guide bars and which has recesses encompassing the seat rings arranged in the housing of the gate valve.

Abstract: This is a unitary bellmouth duct fitting having a tubular body portion and a bellmouth portion; the tubular body portion has a circumferential terminal edge from which the bellmouth portion or flange radially and integrally extends and the bellmouth portion merges with the tubular body portion to provide a less than two inch radius; the bellmouth portion has a lower surface which has a double sided adhesive first gasket engaged therewith and has a series of spaced holes formed therethrough, the first gasket is of a somewhat malleable material, and is of a ring-shaped configuration, the tubular body portion has an inner surface, the first gasket is of a malleable material and of a ring-shaped configuration, a first, through aperture is formed in the body portion spaced from the bellmouth portion, a second through aperture is formed in the body portion on the same horizontal plane as the first aperture, a damper fitted within the bellmouth duct fitting, the damper of a disk like configuration, has an upper surf

Abstract: A butterfly valve comprising a valve body, a throttle plate located within a throat of the valve body, and opposed projecting pins connected to the throttle plate and extending into two opposed bores of the valve body. At least one pin has an annular bearing surface. A spring urges either a thrust bearing against a needle bearing which in turn bears against the annular bearing surface or a needle bearing against the thrust bearing to bear against the annular bearing surface. This urges the throttle plate against an opposed thrust bearing which bears against the opposed projecting pin connected to the throttle plate to center the throttle plate within the throat of the valve body. A set screw can be provided to accurately position the throttle plate within the throat of the valve body. Preferably the throttle plate has tapered end sections to diminish turbulence within the valve throat.

Abstract: A terminal unit for an air handling system and comprised of a housing having a conditioned air inlet for receiving forced conditioned air in the housing. A main outlet opening and a by-pass air outlet opening are provided in the housing. An air flow path is defined between the air inlet and the outlet openings. An air divider gate is slidingly displaceable transverse to the air flow path to deflect air entering the inlet to one or both of the outlet openings. The divider gate has an outlet obstructing rear end and an upstream deflecting face. A linkage assembly is connected to the divider gate to displace the gate across the flow path to simultaneously open one of the outlet openings and close the other, in equal proportions, as desired, while maintaining a substantially constant total outlet opening area as well as maintaining substantially constant inlet air flow conditions.

Abstract: A subsurface hydronic heat-exchanging apparatus and method are provided for controlling the temperature of a turf field. A temperature-controlling fluid is circulated from a temperature-controlled fluid source through a supply header laterally disposed to the field and coupled to an array of hollow tubular heat-exchanging elements underlying the field. Fluid is recirculated to the fluid source from the tubes through a return header laterally disposed to the field and coupled to the tubes. Temperature sensors are disposed adjacent the turf field which detect the temperature of the field and a temperature control device is provided which is responsive to the detected temperature.

Abstract: A system for preheating air before it enters the combustion chamber of a gas turbine engine includes a recuperator which extends between, and is supported by, forward and rear headers. Cold air to be pre-heated by the recuperator flows through an entry passage in the forward header, then into and through a first conduit of the recuperator which extends the length of the recuperator. The air then flows through a plurality of cross conduits located at different locations along the length of the recuperator where it becomes heated by the flow of turbine exhaust gas. Flow of the now-heated air continues into a second conduit in which it is guided toward the combustion chamber.

Abstract: A constant air pressure unit for an air handling system. The unit comprises a housing having an air inlet opening for admitting pressurized air into the housing. The housing has a top wall with a by-pass opening therein and a door is displaceably retained over the by-pass opening. The door has a predetermined load whereby the door is caused to lift away from the by-pass opening when the pressure of the air in the housing is equal to the pressure required to lift the load. The door load defines a maximum housing pressure. In the case where the pressure at the inlet opening starts to increase above the predetermined maximum housing pressure, the door lifts and by-passes the excess pressurized air and thus limits the inlet and housing pressures. In a corollary unit, an air outlet opening for releasing air is included. A pressurized airflow path is defined between the inlet opening and the outlet opening.

Abstract: A safety sub is disclosed for retaining drilling fluid in the kelly or equivalent and other components of the mud system located above the drill string when pressure drops in the drill string, such as when the circulation pump is turned off in adding a new joint to the drill string. The safety sub includes a pressurized elastomeric cartridge with an elastomeric closure having an asymmetrical wall thickness, preferably achieved by the removal of a chord of material from its external circumference. When internal drilling pressure drops, the external pre-charge pressure closes the elastomeric material by inwardly collapsing the thinner wall portion of the closure. The metallic end pieces of the cartridge are bonded to the elastomeric material during the molding process.

Abstract: A hose assembly suited for delivering viscous material to a dispenser nozzle at a controlled viscosity and temperature. The hose assembly includes a jacketed hose including an outer hose positioned around an inner hose carrying the mastic and defining an annular passage between the inner hose and the outer hose, and a hose cover assembly adapted to be releasably wrapped around a further remote hose carrying the mastic. The cover assembly includes an elongated strip of flexible material including generally parallel opposite longitudinal edges; a plurality of tubes embedded in the strip and running longitudinally through the strip; and coacting interengagable quick release means (such as a zipper) on the opposite longitudinal edges of the strip to enable the strip to be wrapped around the hose and secured in position around the hose by releasable interengagement of the quick release means.

Abstract: A heat-exchanger includes a plurality of stacked tubular elements each having tanks, and passage-forming protrusions defining a passage connecting the tanks, fins interposed between adjacent ones of the tubular elements and contacting the passage-forming protrusions, inlet/outlet units each comprising a barrel-shaped element protruding from and open to the tank of a respective one of the tubular elements, inlet/outlet pipes fitted coaxially in contact with and joined to the barrel-shaped elements, respectively, and a measure (reinforcement) for preventing parts of the barrel-shaped elements from being deformed as the inlet/outlet pipes are fitted to the barrel-shaped elements during the assembly of the heat exchanger to in turn maintain the integrity of the joints between the inlet/outlet units and the inlet/outlet pipes. The reinforcement may include a ring disposed around the barrel-shaped element adjacent an end thereof.

Abstract: The present invention provides a mechanically operated traveling valve for use in a sucker rod pump. The valve includes a cylindrical housing, a base positioned in the bottom of said housing which contains a first portion of a sliding shear seal, and a piston positioned within said housing above said base which contains a second portion of the sliding shear seal. The valve is operable between open and closed positions by reciprocal action of a sucker rod on the piston which opens and closes the sliding shear seal.

Abstract: An improved stub shaft to disc connection for a butterfly valve is provided having a valve disc with a hub. The valve disc is adapted to be rotated between an open and closed position. A valve disc seat is adapted to engage the valve disc in the closed position. A shaft is joined to the valve disc to permit torque to be transmitted to the valve disc from a point remote therefrom. The shaft is joined to the valve disc by forming the valve disc with a portion of increased thickness (hub) relative to the main portion of the disc. The portion of increased thickness is formed at a point adjacent the circumference of the disc. A hole (bore) is then machined into the portion of increased thickness parallel to the disc. The bore consists of a single larger aperture contiguous with a plurality of smaller apertures, the plurality of smaller apertures, positioned at a point more distal the circumference of the disc than the single larger aperture.

Abstract: An isolation valve for a single crystal pulling apparatus providing a good sealing performance is disclosed. The apparatus comprises a casing having two opposite valve seats, a first valve seat having a first opening communicable with the main chamber of the apparatus, a second valve seat having a second opening communicable with the pull chamber of the apparatus. The body of the isolation valve includes a first plate movable in and out of contact with the first valve seat to open and shut the first opening, a second plate movable in and out of contact with the second valve seat to open and shut the second opening, and a bellows connecting the first and second plates.

Abstract: A heat radiating conduit having heat radiating fins is arranged in adjacency to a pneumatic tube receiving pressurized air in cooperation with a thermostatic switch to actuate pressurizing of the tube upon obtaining predetermined ambient air temperature.