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| Number | Title | Issue Date |
| 4113230 | Rotating blade fire damper A fire, smoke and air control damper is disclosed wherein one or more hook-shaped hinge portions formed intermediate between the longitudinal edges of each damper blade engage complementally configured hook-shaped hinge elements formed on opposite sides o... | 09/12/1978 |
| 4113232 | Smoke, fire and air control damper with stamped blade A novel smoke, fire or air control damper is disclosed wherein a frame with an inwardly depending flange is articulated to at least one rotating blade by integrally formed hook-shaped hinge elements and hinge portions which are stamped in the blade and fl... | 09/12/1978 |
| 4103866 | Butterfly valve The butterfly valve includes a pair of tailpieces which are threaded onto the outer ends of axially spaced pipe sections of a piping system and have a radially extending flange, a valve unit having a wafer-like body which fits between the tailpieces, and ... | 08/01/1978 |
| 4101112 | Pipe line coupling system A clamp for securing in a fluid proof manner a wafer type butterfly valve to the coupling flange of a pipe. Wafer type butterfly valves are inserted between the flanges of two aligned pipes and are retained in position by bolts connecting the two flanges ... | 07/18/1978 |
| 4093178 | Valve A butterfly type valve is provided with an annular sealing ring disposed in a groove in the bevelled periphery of the circular valve plate. The operating shaft is journalled in a radially disposed external boss and an operating handle having a spring bias... | 06/06/1978 |
| 4038734 | Method of manufacturing a butterfly valve The method of manufacturing a butterfly valve from plate steel which comprises flame cutting the outer configuration of the valve body and flame cutting a circular disc from the center of the body resulting in a water opening through the body and utilizin... | 08/02/1977 |
| 4037819 | Butterfly valve having metal-to-metal sealing with conical angle-transported vane A butterfly valve that has a metal valve seat and a metal vane, providing fluid-tight metal-to-metal sealing. The valve seat is annular and has an inner circular line surface for engagement with the metal vane. The vane is a conical angle-transported disc... | 07/26/1977 |
| 4022424 | Shaft bearing and seals for butterfly valves A butterfly valve comprises a valve disc mounted on and rotatable with a shaft disposed across the inner diameter of a cylindrical valve casing, said shaft being rotatably supported at each end by a bearing within the valve casing. Fluid flow through the ... | 05/10/1977 |
| 4008877 | Butterfly valve apparatus A butterfly valve apparatus comprising a rotating shaft, a valve stem movable by the rotating shaft through a coupling member and a valve plate fixed within a valve housing to the valve stem.... | 02/22/1977 |
| 4007910 | Butterfly valve apparatus A butterfly valve apparatus comprising a rotating shaft, a valve stem movable by the rotating shaft through a coupling member and a valve plate fixed within a valve housing to the valve stem.... | 02/15/1977 |
| 4005849 | Butterfly valve The valve has a closure member in the shape of a dish which has an end wall and a flared lateral wall and is pivotable in the passage of the valve body between a closing position and a maximum opening position which is substantially perpendicular to the c... | 02/01/1977 |
| 3995661 | Flow control valve for magnetic particulate A flow control valve for magnetic abrasive is disclosed. The valve employs a plurality of permanent magnets spaced around its circumference to set up a magnetic flux pattern. A valve disc of magnetic material mounted to a shaft for rotation is provided fo... | 12/07/1976 |
| 3988000 | Seals for a gas service butterfly valve A mechanically packed gasket is supported circularly concentric on the operator shaft of a butterfly valve in a wedged interfit with an inwardly chamfered end of the shaft journal. With gasket pressure of magnitudes greater than line pressure, leakage of ... | 10/26/1976 |
| 3971414 | Servo butterfly valve and vane The butterfly valve vane is constructed with a main vane portion and a movable servo tab. The servo tab is controlled to open relative to the main vane portion in order to define an auxiliary flow path so that the flow forces acting on the vane create a s... | 07/27/1976 |
| 3961769 | Adjustable bearing structure for butterfly gate valves A butterfly gate valve for control of water in treatment, waste water plants and the like, wherein the gate is mounted on a one-piece shaft. The lower end of the shaft rotates in a radial bearing, and a radial bearing and a thrust bearing are provided on ... | 06/08/1976 |
| 3960177 | Low torque and low noise butterfly valve disc A butterfly valve disc with generally oval plane surface, tiltingly arranged so that the outer periphery forms a perfect circle intersecting with the inner bore of a butterfly valve, and where the outer rim of the disc further supports a row of ribs arran... | 06/01/1976 |
| 3958595 | Corrosion resistant valve construction A valve, such as a butterfly valve having an offset closure vane and a thru shaft for operating the vane in the flow passage of the body, has all exposed and/or potentially vulnerable metal surfaces encapsulated in a corrosion resistant polymeric plastic ... | 05/25/1976 |
| 3946752 | Flue gas valve for the refining process in the inert gas system To prevent explosions in oil tankers, flue gases from a furnace or boiler are used to fill the oil tanks or gas tanks to reduce the oxygen content below the burning point and below where explosions would occur and it has been the practice to use the flue ... | 03/30/1976 |
| 3934851 | Butterfly valve having a split vane The butterfly vane is constructed of two semi-circular parts, each of which pivots about a common longitudinal axis. One part is mounted on a shaft which is connected to a drive while the second part is mounted on a second shaft concentrically of the firs... | 01/27/1976 |
| 3931955 | Butterfly valve A butterfly valve comprising a housing in which a flat flap having an elastic rim is adapted to turn between a position in which the plane of the flap is parallel to the axis of the flow passage across the housing and a position in which the elastic rim i... | 01/13/1976 |
