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| Number | Title | Issue Date |
| 5788218 | Damper system with edge sealed damper blade and method of assembly A damper system has a rotatable, damper blade with a peripheral extending generally U-shaped channel edge seal fitted over the damper blade's peripheral edge. The channel edge seal comprises two edge seal members that are held together in tension by two r... | 08/04/1998 |
| 5533543 | Poppet seat for air regulating devices A poppet seat for air regulating devices, such as underwater diving equipment, includes a metal or plastic substrate around and through which synthetic or rubber seat material is molded. In its preferred form, this seat material surrounds the sides of the... | 07/09/1996 |
| 5458148 | Fluid flow control damper assembly and method A fluid flow control damper assembly and associated method are characterized by a self-contained unit comprising a support base for external mounting to a side of a duct, a damper vane mounted to the support base for movement between open and closed posit... | 10/17/1995 |
| 5370148 | Butterfly valve assembly and method of manufacture 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 ret... | 12/06/1994 |
| 5357997 | Valve with segmented retainer ring A disc valve with a disc that is pivotable between open and closed positions has a metallic seal ring placed against an axially-oriented face formed by the housing and located at the ends of an enlarged conduit portion between the face and one of the ends... | 10/25/1994 |
| 5277216 | Method of attaching a valve disc to a drive shaft The drive shaft is formed with a longitudinally extending groove and the wall of a blind bore formed in the valve disc for receiving the shaft is formed with a projection which fits in the groove by a punching operation. The mating parts are readily made ... | 01/11/1994 |
| 5168890 | Method and device for fitting a rotary throttle unit in a pipe A method and device are disclosed for fitting a shaft-butterfly valve unit in a pipe formed by a butterfly valve body. The device comprises a frame receiving the pipe with its unit. It also comprises a first thruster for moving the shaft in a first direct... | 12/08/1992 |
| 4967779 | Method of installing a valve seat in a valve body A method of installing a valve seat in a valve body wherein the valve body is provided with an annular, radially inwardly extending rib defining a circular opening through the valve body and the seat member is an annular member having an annular extending... | 11/06/1990 |
| 4858517 | Fire damper kit A fire damper kit is set forth wherein a fire damper box is formed with a first framing angle iron fixedly secured thereto with a second angle iron slidable thereon to secure said damper and sandwich a fire wall between said opposed angle iron collars. A ... | 08/22/1989 |
| 4718445 | Position indicator for a rotary valve actuator A position indicator for and method for applying the same to valve arrangements having a first strip attached to a first movable part and a second strip attached to a second stationary part of the valve arrangement. The strips have a line arranged down th... | 01/12/1988 |
| 4697615 | Butterfly valve for controlling high-temperature fluid A butterfly valve for controlling high-temperature fluid including a ceramic valve is disclosed. The butterfly valve exhibits excellent high-temperature sealing and heat insulating characteristics and strength sufficient to rigid support the valve disc th... | 10/06/1987 |
| 4575046 | Valve seat retainer having a full uninterrupted gasket face A recessed seat retainer for a valve is secured in an annular recess on the face of a valve body by a totally internally disposed key system which does not create an external leak path. An annular keyway is formed in the cylindrical sidewall of a seat ret... | 03/11/1986 |
| 4575048 | Insert retainer for a wafer style butterfly valve A wafer style butterfly valve has a valve body including a through opening with a cylindrical wall coaxially surrounding an end portion of the fluid passage. The insert is retained within the valve body by one or more resilient wire forms held in an annul... | 03/11/1986 |
| 4498798 | Locating pin A locating pin having a generally cylindrical, threaded lower portion and an axially aligned, nonthreaded upper portion is provided. The threaded lower portion has at least one vertical slot in which is located a locking bar. The locking bar has a flat lo... | 02/12/1985 |
| 4270559 | Method for installing an adjustable flow restricting valve member in a tubular pipe, and a valve device for utilization of the method A method for installing an adjustable flow restricting valve member in a tubular pipe, and a valve device for utilization of the method, including the steps of cutting a slot extending in the longitudinal direction of the tubular pipe, inserting a mainly ... | 06/02/1981 |
| 4213477 | Automatic damper for furnace vent pipe An improved automatic damper for furnace vent pipes is disclosed. The damper is part of a mounting mechanism which is installed in an existing furnace vent pipe and attached to a motor for operation of the damper. The motor is secured to a mounting bracke... | 07/22/1980 |
| 4003394 | Disc valve with improved seal ring A disc valve for placement in a cylindrical housing forming part of a conduit which has a pivotally mounted disc and a valve seat that is angularly inclined relative to a plane perpendicular to an axis through the housing. The disc has a peripheral seal d... | 01/18/1977 |
