Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7617839 | Constant flow valve A regulating valve includes an outer housing comprised of a cap joined to a base. The housing is internally subdivided by a barrier wall into a head section and a base section, the latter being further subdivided by a modulating assembly into a fluid chamber and a s... | 11/17/2009 |
| 7438083 | Pressure regulator filter assembly A pressure regulating apparatus is disclosed for use in an irrigation network. A pressure regulator may be combined with a filter unit in a single pipe to reduce components and joints in the irrigation network. A pipe may be provided having openings in its sides for... | 10/21/2008 |
| 7401622 | Modular pressure regulator A pressure regulator assembly comprising: a regulator body having a housing, an inlet portion at one end of the housing and a cap at an opposite end of the housing, the inlet portion and the cap in substantially coaxial alignment along a regulator body axis; a press... | 07/22/2008 |
| 7140404 | Integral in tank vent construction for pressure based level monitors A method and apparatus are provided for monitoring a liquid level in a closed tank with a differential pressure sensor module disposed in a bottom portion of the tank, by routing a pressure reference tube extending from the pressure sensor module through the interio... | 11/28/2006 |
| 7111637 | Enclosure system for pressure relief device An enclosure for a pressure relief device, particularly pressure relief devices mounted on electrical equipment housings, is pre-assembled together with the pressure relief device. The enclosure, which provides for temporarily confining and directing fluids discharg... | 09/26/2006 |
| 6957742 | Vented trap A swimming pool debris trap having an externally operable venting mechanism for reducing pressure or vacuum in the trap. ... | 10/25/2005 |
| 6920893 | Corrosive resistant liquid extraction apparatus A liquid transfer system that includes a valve and a coupler assembly of unique design for use in extracting hazardous fluids from a transport container. The system includes a novel valve and coupler assembly that is of a simple design and is uniquely constructed fr... | 07/26/2005 |
| 6848466 | Reset tool for a gas fuel tank and method for using the same A tool and method of utilizing the tool to release pressurized gas trapped between a main valve and a safety valve of a portable liquified petroleum gas tank is disclosed. The tool includes a tank safety valve release member structured to be coupled with the outlet ... | 02/01/2005 |
| 6848465 | Dual-action vent check valve A dual-action vent check valve is disclosed. The valve includes a first check valve which is responsive to elevated fluids inside the valve. A second check valve is responsive to elevated fluids external to the valve. The first check valve prevents overflow from a v... | 02/01/2005 |
| 6837260 | Pressure support system having a two-piece assembly A pressure support system that includes a first housing member and a second housing member. The first housing member has a first plurality of cavities defined therein, and the second housing member has a second plurality of cavities defined therein. The first and se... | 01/04/2005 |
| 6792969 | Pressure regulator A pressure regulator has a closing member which controls a pressure-medium inlet and on which is supported a valve spring arranged in a spring can. The spring can includes a casing part and of a lid. The valve spring is supported with one end against the lid. The li... | 09/21/2004 |
| 6722388 | Multiple pressure regulator A pressure regulator having a valve cartridge adapted to be removably held within its housing, said cartridge having a frame carrying and positioning a valve seat, a valve member, a valve stem, and a spring. The valve cartridge ensures correct spacing between the va... | 04/20/2004 |
| 6668853 | Pressure relief valve with field-replaceable high corrosion-resistant components A pressure relief valve has a gasketed main body fastened to a vessel wall adjacent to a vent port, the body having a recess surrounding the port which receives a plastic insert removably coupled to the body by a retaining ring fastened to the main body. ... | 12/30/2003 |
| 6431196 | Combination pressure relief device A pressure relief device with a permanently attached rupture disk is disclosed. The pressure relief device includes a valve body. The valve body includes an inlet and an outlet defining a flow passage therebetween. A valve mechanism is housed in the valve... | 08/13/2002 |
| 6422205 | Twist off pressure regulator connector assembly A connector assembly and a method of disconnecting the connector assembly. The connector assembly comprises a first part and a second part. The first part extends along a longitudinal axis and has a protrusion that extends radially outward from the longit... | 07/23/2002 |
| 6223765 | Casing construction for fuel dispensing systems A casing which provides a fluid and electrical interface between components of a fuel dispensing system. A column pipe which receives fuel pumped from an underground tank connects with a power head mounted in the casing. A check valve controls flow from t... | 05/01/2001 |
| 6182682 | Pressure balance device for use in a faucet An improved pressure balance device for use in a faucet is made up of a pair of symmetric semi-cylindrical units and a tubular water inlet cap. Each semi-cylindrical unit has a semi-circular cross section and on each edge of the vertical face thereof is d... | 02/06/2001 |
| 6012475 | Self-piercing valve assembly The present invention comprises an improved method and apparatus, associated with a self-piercing valve assembly for mounting the self-piercing valve on a pipe and for constraining movement of the valve on the pipe. In accordance with a preferred embodime... | 01/11/2000 |
| 6009893 | Assembling structure for balance valve of cold/hot water mixing valve An assembling structure for balance valve of cold/hot water mixing valve, which includes a balance valve shade board for assembling a water pressure balance valve with the bottom of the mixing valve. A lower surface of the bottom wall of the mixing valve ... | 01/04/2000 |
| 5983918 | Balancing valve assembly of a cold and hot water mixing valve A balancing valve assembly of a cold and hot water mixing valve including a mixing valve casing having a bottom wall provided with a depression for receiving a balancing valve cover plate. Cold and hot water inlets are provided in the depression, and a ba... | 11/16/1999 |
| 5937893 | Shield for pressure relief device A shield for a pressure relief device for containing and deflecting released fluids is described. The shield includes an enclosure for surrounding the pressure relief device, the enclosure having a first port for engaging the enclosure to a relief duct wh... | 08/17/1999 |
| 5918619 | Safety pressure relief valve assembly, components therefor and methods of making the same A safety pressure relief valve assembly is provided wherein the safety pressure relief valve assembly has a first tubular body with a first end and a second end, a wall of given thickness with a bore through the body with an internal flange and a valve su... | 07/06/1999 |
| 5881757 | Pressure regulator apparatus and method A pressure regulator apparatus has a pressure regulator mechanism which includes first and second housing portions, each made of substantially rigid material, such as a PVC polymer, and each housing portion having a passageway therethrough. One of the hou... | 03/16/1999 |
| 5775360 | Pressure control valve The invention provides a pressure control valve which can be made of aluminum as much as possible and has a comparatively light weight and wherein a seat member made of steel can be force fitted into a spool of aluminum at a room temperature. The pressure... | 07/07/1998 |
| 5769952 | Reduced pressure and normal pressure treatment apparatus A reduced pressure treatment unit comprising a plurality of treatment chambers conducting reduced pressure process treatment of a treatment object (wafer) and a normal pressure treatment unit conducting normal pressure process treatment of the treatment o... | 06/23/1998 |
| 5645099 | Sewer relief valve A sewer relief valve (40) made out of a durable plastic material comprises: a raised head or float housing (52) that serves as a gripping means during it's removal and installation; said housing (52) has male threads (53) which circumference the lower ver... | 07/08/1997 |
| 5465937 | Fluid pressure control device A fluid pressure control device having a housing formed with a bore and a solenoid valve mounted in the bore. The solenoid valve has a frame of a magnetic material mounted in the bore. The frame and thus the solenoid valve are mounted in the bore of the h... | 11/14/1995 |
| 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 |
| 5435339 | Manual air relief valve A manually operable pressure relief valve for swimming pool filter systems and the like, including a valve housing, a valve stem movable axially in the housing to open and close the valve, and a top cover that serves as an operating handle. The valve hous... | 07/25/1995 |
| 5431181 | Automatic valve assembly A valve assembly is disclosed which is adapted to fit existing valve bodies. A flexible diaphragm assembly positioned within the valve body seals against a cylindrical barrel of the valve body. A central tube positioned within the central barrel defines a... | 07/11/1995 |
| 5381816 | Pressure regulator A fluid pressure regulator of compact construction including an improved diaphragm-valve assembly interposed between a flow body and a second body cap element. The flow body has an inlet and outlet passage and a valve cavity with a centrally disposed port... | 01/17/1995 |
| 5295502 | Non-refillable valve A non-refillable valve for a pressure container which includes a housing with a central passageway, which has a lower portion that is narrower than its middle portion which in turn is narrower than its upper portion. A side port is present in the lower re... | 03/22/1994 |
| 5259375 | Second stage scuba regulator with balanced piston volume control A second stage scuba regulator is provided which includes inlet for receiving a supply of compressed air and a piston valve in communication with the inlet for causing air flow through the regulator when the piston valve is opened. A lever is provided for... | 11/09/1993 |
| 5209257 | Sewer relief valve A vent for relieving pressure in a sewage collection system for buildings characterized by a buoyant float-closure which will easily open in response to fluid pressure to permit escape of gas or liquid from the system upon the build-up in the system of mi... | 05/11/1993 |
| 5088515 | Valve system with removable fluid interface A valve having a disposable portion, which comes into contact with the fluid being controlled by the valve. The disposable portion has a valving chamber and a flexible membrane, which can seal off a mouth that is located on a protrusion in the chamber. Th... | 02/18/1992 |
| 4967785 | Valve actuator A valve actuator is disclosed which is encased in a housing with a bonnet mounted at one end and an end cap on the other end. Inside, an actuator shaft is slidably mounted through a bore on a guide connected to the bonnet. A piston is slidably mounted wit... | 11/06/1990 |
| 4799418 | Vacuum actuator for vehicle speed control Disclosed is a pressure actuator such as a vacuum actuator comprising a valve unit including a plurality of solenoid valves and a diaphragm unit including a diaphragm defining a pressure chamber, air pressure within the pressure chamber being adjusted by ... | 01/24/1989 |
| 4782854 | Aspirator system The aspirator system of this invention is directed to an economical regulator assembly which can provide a substantially uniform vacuum without the need for periodic adjustment. The vacuum of the system can be easily and accurately adjusted, thereby accom... | 11/08/1988 |
| 4768544 | Digital valve flow control system A digital valve unit comprised of a plurality of valve orifice sections which have orifice sizes in a binary relationship. The orifice sections are detachable from the valve unit such that the unit may be modified to have different size orifices in differ... | 09/06/1988 |
| 4543980 | Valve for pressurized containers A valve for a pressurized container having a blocking element therein which is adapted to occupy an initial location in which fluid can move in and out of the container past the blocking element. The valve and blocking element are further configured such ... | 10/01/1985 |
