Abstract: An improved pinch valve construction comprises a pair of pinch bars spaced apart of each other, and a valve sleeve intermediate the pinch bars and having wall portions bounding a flow-through passage. A flow-control device moves the pinch bars towards and away from each other and is operative for urging the sleeve from an open configuration in which the wall portions are spaced apart at a pre-determined distance to thereby permit flow through the passage, towards a flattened configuration in which the wall portions are spaced at a distance less than the predetermined distance to thereby restrict flow through the passage. A restoring device urges the sleeve from the flattened configuration towards the open configuration, whereby any tendency of the sleeve to remain in the flattened configuration when the pinch bars are moved away from each other is counteracted.

Abstract: The present invention is related to a fluid metering valve that is specifically constructed to provide fine metering at extremely low flow rates while still providing a full shut-off capability. The fluid metering valve of the present invention is specifically adapted to be utilized in conjunction with corrosive fluids or fluids containing suspended solid particles that would otherwise damage or clog a comparable precision needle valve.

Abstract: A feeder for apparatus for ejecting a mixture of liquids, e.g. urethane foam, comprises a pair of swash plate proportioning pumps one individual to each of the liquids, e.g. resin and isocyanate, each proportioning pump being fed by a gear pump from a supply of the respective liquid. Seepage along the drive shafts of the isocyanate pumps is continuously removed by bathing them in a recirculating stream of flushing agent. The swash plate and gear pumps and flushing agent pump are all driven by a single motor from a common chain drive. The liquids are heated during passage through separate hoses to a common dispensing head or gun, by immersed coil electric resistance heaters extending lengthwise freely within the hoses. A novel control system is provided for the hose heater circuit, the adequacy of the liquid supply and other operating conditions.

Abstract: A combined relief valve and lid structure is provided for pre-mix beverage and syrup containers having a tubular body enclosing a relief port in the lid, an annular valve seat surface about the relief port and raised higher than the lid surface and drain ports extending from the valve seat surface down to the lid surface to enhance drainage of the entire internal portion of the valve body. The relief port is closed by a spring biased poppet and has a biasing spring held in place in the top of the tubular body by a one-way detent and retainer clip arrangement which must be destroyed to remove it from the valve body to gain access to the relief valve poppet. The valve cannot be tampered with unless this retainer clip for the valve spring is destroyed. The retainer clip is ported to permit cleaning steam or other fluid to enter the top of the valve and drain off through the drain ports without accumulation of condensate or residual fluid in the valve.

Abstract: A gas supply system including purge means. A supply conduit having an inlet and an outlet and a downstream direction of flow has within it a purge conduit with an inlet and a discharge port. The discharge port is directed upstream in the supply conduit and discharges adjacent to its inlet, whereby to purge that region of the supply conduit and to sweep gases from the entire supply conduit. The system is also provided with a selector valve able selectively to deliver gas to a delivery conduit or to a vent conduit or to shut them both off.

Abstract: A gas control device for controlling the gas supply to the burner of a domestic hot water boiler has two main valves arranged in series in the gas flow path so as when closed to define a chamber between them. A second chamber is communicable with this chamber through an auxiliary valve which is open when the main valves are closed and closed when the main valves are open. A shut-off valve is responsive to the pressure in the second chamber so as to close the flow path if gas leaks through the upstream main valve when supposedly closed. The subsequent closing of the auxiliary valve when the main valves are later opened maintains the pressure in the second chamber so that the shut-off valve remains closed.

Abstract: A valve assembly comprising a valve body having a flowway therethrough and a seating surface extending radially into the flowway from the valve body. A disc type valve element has a sealing area engageable with the seating surface and is mounted in the flowway for movement of the sealing area toward and away from the seating surface. A fluid passageway extends through the valve body and includes inlet means opening externally of the valve body and outlet means opening internally of the valve body and generally radially into the flowway and positioned such that a fluid may be directed against the seating surface through the fluid passageway.

Abstract: A fire-safe valve structure has a metal seat with an annular groove therein in which a resilient sealing ring is positioned in face-to-face contact with a valve member movable between open and closed positions. The annular groove has an annular space behind the resilient sealing ring to permit displacement of the sealing ring. A fusible material which melts at a predetermined high temperature is associated with the annular space and holds the sealing ring in contact with the valve member. Upon melting of the fusible material and subsequent metering thrugh a metering opening, the sealing ring is displaced within the annular space and the valve member moves into a tight metal-to-metal contact with the metal seat.

Abstract: The sillcock includes an inner tubular pipe forming a water-flow passage and an outer tubular pipe cooperating with the inner tubular pipe to form a water relief chamber. When the inner tubular pipe is ruptured as a result of the expansion of ice in the inter-flow passage, water from the source is directed across the open valve of the sillcock into the water-flow passage where it escapes into the water relief chamber through the ruptured opening. The relief chamber is opened to the atmosphere and water emerging therefrom alerts a person to the fact that the inner tubular pipe has ruptured thereby requiring repair or replacement.

Abstract: A fire hydrant having a unitized bonnet configuration or assembly which includes a bonnet member, operating mechanism, external driving attachment and lubricant reservoir and which may be installed and removed from the hydrant barrel without the loss of lubricant from the lubricant reservoir therein or without the major disassembly of parts. Additionally, the unitized bonnet assembly is provided with a stop nut member which may be adjustably secured to the end of the valve stem to compensate for small variations in barrel lengths and/or valve stem lengths. The stop nut member is carried within the lubricant reservoir of the bonnet member and is at all times sealed from water in the hydrant and, thus, it may be made of a non-corrosive resistant material such as ductile iron or steel which is less expensive than corrosive resistant material such as brass, bronze or stainless steel.

Abstract: This invention relates to structure for preventing icing in fluid valves such as gate valves, the gate of which is movable inside a chamber. Obstacles formed with orifices therein communicate with the chamber, intercept the flow of fluid through the valve and create a continuous circulation of fluid in the chamber thereby preventing any accumulation of water therein which is liable to freeze and cause the valve mechanism to seize up.

Abstract: A plurality of gas actuated valves capable of high-speed action, great prure endurance and withstanding shock, vibration and a marine environment. A sliding member, closing the valves inlet ports, may be retained by a frangible flange. Electrically-initiated gas cartridges produce a rapid pressure rise causing the sliding member to be displaced thereby shearing the flange and allowing the sliding member to uncover the inlet ports for ambient fluid entry. A plurality of O-rings minimize functional sensitivity to external pressure and seal the valve against the entry of the ambient fluid.

Abstract: An inner valve comprises a stem having one fixed inner valve part and one or more inner valve parts which upon rotation of the stem are axially movable relative to the fixed part so as to provide a port of continuously variable area. The stem, with its inner valve parts, is also axially movable. The inner valve may be used in different types of control valves such as a two- or three-way valve for feeding hot or cold fluid to a heat exchanger.

Abstract: Apparatus for performing operations of agitating a material to be treated in a rotary kiln and scraping away substances adhering to the inner wall of the rotary kiln effectively at a high efficiency so as to operate the rotary kiln continuously for a long time and perform the heat treatment in the rotary kiln very smoothly.

Abstract: A butterfly damper with a plurality of blades which can be locked in the open position, and which, when released, rotate about a hinge to the closed position. A pawl member, attached to one blade, extends away from the blade and through an opening in a second blade when the blades are in the open position. A mounting member attached to the second blade restrains the pawl member thereby holding the blades in the open position. A bimetallic link attached to the mounting member causes the pawl member to be released when the temperature of the air passing through the duct increases beyond a preselected level. A closure spring attached to the blades acts on the blades tending to force them apart against the action of the mounting member and the pawl member when the blades are restrained in the open position. The damper blades can be insulated to prevent the heat from a fire on one side of the damper from being conducted by the damper to the other side when the blades are in the closed position.

Abstract: An integral reverse buckling fluid pressure rupturable apparatus comprised of a support body formed of a ductile material having opposite ends and having a recess extending inwardly from one of the opposite ends, the internal terminus of the recess being positioned in close proximity to the other of the opposite ends of the body or to the terminus of another recess extending inwardly from the other of the opposite ends, whereby a relatively thin integral rupturable portion is formed in the body. The rupturable portion is of a concave-convex shape formed by applying pressure on a side of the rupturable portion when in a substantially flat state.

Abstract: A length of fiberglass duct with a thermoplastic sleeve positioned within the duct as a liner, with the sleeve fixed to the duct at the downstream end of the sleeve. Flames or high temperature fluids moving through the duct soften the thermoplastic sleeve and causes the sleeve to collapse blocking further movement through the duct. In an alternative embodiment, the sleeve is used as a splice between two pieces of duct with the heat in the duct causing the softening and collapse of the sleeve.

Abstract: A length of fiberglass duct with a thermoplastic sleeve positioned within the duct as a liner, with the sleeve fixed to the duct at the downstream end of the sleeve. Flames or high temperature fluids moving through the duct soften the thermoplastic sleeve and cause the sleeve to collapse blocking further movement through the duct.

Abstract: A valve control mechanism for operating a plurality of valves in a bank of valves which can be selectively operated by interchangeable lever arrangements one of which has a separate lever for each valve and another of which has a single lever for a pair of valves. The bank of valves and the lever arrangements are detachably removable independently of each other to permit easy servicing and selecting of the desired lever arrangement or to change the sequence of valve operation.

Abstract: A combined relief valve and lid structure is provided for pre-mix beverage and syrup containers having a tubular body enclosing a relief port in the lid, an annular valve seat surface about the relief port and raised higher than the lid surface and drain ports extending from the valve seat surface down to the lid surface to enhance drainage of the entire internal portion of the valve body. The relief port is closed by a spring biased poppet and has a biasing spring held in place in the top of the tubular body by a one-way detent and retainer clip arrangement which must be destroyed to remove it from the valve body to gain access to the relief valve poppet. The valve cannot be tampered with unless this retainer clip for the valve spring is destroyed. The retainer clip is ported to permit cleaning steam or other fluid to enter the top of the valve and drain off through the drain ports without accumulation of condensate or residual fluid in the valve.