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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7753073 | Occlusion valve with safety relief An occlusion valve with safety relief comprising a manifold block having an inlet and an outlet. A diaphragm connected to the manifold block and for being manually pressed to stop flow between the inlet and the outlet. A pressure relief valve internal to the manifol... | 07/13/2010 |
| 7628170 | Flow control valve A flow control valve is provided that comprises a valve housing having an inlet, an outlet, and a valve chamber that includes a first valve port opening in communication with the inlet and a second valve port opening in communication with the outlet. The various emb... | 12/08/2009 |
| 7426935 | Method of discharging high pressure storage vessels A master/slave tank system for storing a compressed hydrogen gas, where the system employs an electrically driven shut-off valve for each tank in the system. The tank system includes a master tank and a slave tank for storing the gas. A first line is coupled to the ... | 09/23/2008 |
| 7412987 | Expansion tank with valve An expansion tank to be connected to a pipe system filled or with a liquid is disclosed. The expansion tank includes at least one connection opening for a liquid pipe. The tank has a main valve to close off the connection opening at a defined difference in pressure ... | 08/19/2008 |
| 7278445 | Shoe having an inflatable bladder An article of footwear including a sole and an upper with an exterior and interior surface, and one or more bladders which comprises at least one of the exterior or interior surfaces of the upper. The article of footwear also includes a inflation mechanism located u... | 10/09/2007 |
| 7137402 | Oil deaeration device An oil deaeration device includes a base and an oil housing, the base being equipped with a first and a second inlet, an outlet, a float provided in the oil housing and a diaphragm provided in the oil housing. The oil housing is divided into two chambers, the float ... | 11/21/2006 |
| 7121293 | Tri valve backflow preventer A tri valve backflow preventer having parts and materials preferably consisting of steel nuts and bolts, ductile iron operating nuts, nitrile rubber O-rings, nitrile rubber gaskets, manganese bronze valve adjusting stems, valve wedge gates made of ductile iron encap... | 10/17/2006 |
| 6981519 | Pressure-regulating valve Pressure-regulating valve having a throttle mounted in a tube section such that it can be pivoted about a pivot axis from an open position into a closed position. The throttle having a pressure relief valve mounted therein. ... | 01/03/2006 |
| 6962165 | Automatically-actuated safety device with a double-seated valve to regulate the flow rate of a fluid A safety device for insertion into a pipeline (K) in which fluid circulates in an upstream (X−) and a downstream (X+) direction, comprises a tube (1) that provides the fluid with a central circulatory passage (CC) regulated by a central valve (3) tha... | 11/08/2005 |
| 6915787 | Fuel supply apparatus and fuel pressure regulator A fuel supply apparatus having a fuel pressure regulator (60) for regulating the pressure of fuel discharged from a fuel pump (4) to a predetermined pressure, the fuel pressure regulator (60) including: a first chamber (62), formed in a c... | 07/12/2005 |
| 6871666 | Bi-directional dual chamber orifice fitting Methods and apparatus for a bi-directional dual chamber orifice fitting comprising a body with a chamber in fluid communication with a flow bore. The fitting also comprises an orifice supported by an orifice plate carrier that is selectably disposable in the bore. I... | 03/29/2005 |
| 6868861 | Level control system for sheet casting process A level control system for controlling the thickness of a work material in a slurry form cast upon a moving belt includes a fluid reservoir disposed above the belt, a sensor lens assembly for sensing the slurry height within such reservoir, and a control valve for a... | 03/22/2005 |
| 6843463 | Pressure regulated slip ram on a coil tubing blowout preventer A blowout preventer for coiled tubing includes a pressure regulator for a slip ram so that the coiled tubing can be held firmly without exceeding the yield strength of the coiled tubing material and without damaging the coiled tubing. ... | 01/18/2005 |
| 6766800 | Pressure regulating valve for use in continuous positive airway pressure devices A valve for use in continuous positive airway pressure (CPAP) devices includes a valve body that is disposed at or between the patient mask and the source of positive airway pressure. The valve body includes first and second exhaust paths for exhausting gas from the... | 07/27/2004 |
| 6763844 | Fuel tank structure of a remotely controllable car A fuel tank structure of a remotely controllable car. A fuel pipe is disposed in the fuel tank. A middle section of the fuel pipe has a fuel outlet by which the interior of the fuel pipe is divided into a first section and a second section. Two steel balls are respe... | 07/20/2004 |
| 6725874 | Delayed triple pressure flow valve A delayed triple pressure flow valve for controlling the hydraulic fluid passing to two work stations. ... | 04/27/2004 |
| 6629545 | Cut-off valve for power steering systems, especially for automobiles A cut-off valve for power steering systems, especially for automobiles, includes a source of a pressure and a container, and is used for limiting a pressure in at least one pressure chamber. The cut-off valve also includes a closing body, which may be adj... | 10/07/2003 |
| 6619182 | Flow control device A flow control apparatus for a fluid cylinder for a workpiece holder includes a flow restricting member and a flexible sealing member. The flow restricting member defines a first passageway and a sealing surface. The flexible sealing member is positioned ... | 09/16/2003 |
| 6607007 | Cylinder valve and bayonet check-filter with excess-flow protection feature A valve apparatus especially well-suited for use in gaseous oxygen delivery systems. A valve apparatus is provided that substantially reduces the risk of fire in high-pressure oxygen systems. The apparatus is particularly well-suited for use as a plug val... | 08/19/2003 |
| 6557819 | Roll seal control valve A water system uses a pressure reservoir of an extremely small size. A valve device is placed between a water pump and the pressure reservoir. The valve device has a constant outlet pressure to limit the flow from the pump at high pressures. The pump is t... | 05/06/2003 |
| 6467504 | N connection An "N" connection allows any cleaning device or pig to pass through pipe lines without interfering with fluid flow and without interrupting the flow in the branch line. In the "N" connection a branch line is connected to the main flow line through two con... | 10/22/2002 |
| 6467753 | Sealing joint and casing, especially for a stopcock actuator Stopcock actuator casing, comprising a base (1) having an underside and formed with a hole (2), the underside of the base being subdivided into at least three compartments (4,8,10), the first (4) of which surrounds the hole (2) and the second (8) and thir... | 10/22/2002 |
| 6439265 | Solenoid valve with a check valve A solenoid valve useful in a slip-controlled hydraulic brake system of a motor vehicle, and which has a seat valve disposed between a pressure fluid inlet and a pressure fluid outlet and in the bypass to the seat valve has a check valve with a quad ring a... | 08/27/2002 |
| 6328055 | Annulus pressure referenced circulating valve A circulating valve and associated methods of using same provide control of fluid flow within a subterranean well. In a described embodiment, a circulating valve includes a fluid pressure storage chamber in fluid communication with the exterior of the val... | 12/11/2001 |
| 6276658 | Roll seal control valve A water system uses a pressure reservoir of an extremely small size. A valve device is placed between a water pump and the pressure reservoir. The valve device has a constant outlet pressure to limit the flow from the pump at high pressures. The pump is t... | 08/21/2001 |
| 5474104 | Refueling check valve for compressed natural gas powered vehicles A refueling check valve assembly which provides for rapid, efficient, and safe refueling of compressed natural gas powered vehicles is provided and includes a receptacle adapted to mate with a fuel supply nozzle and a valve body having first and second ga... | 12/12/1995 |
| 5467797 | Two-position three-way solenoid valve A solenoid valve is provided which achieves the function of a two-position, three-way directional control valve and functions at high pressures with low leakage rates. In addition, the valve provides a cost effective and simplified configuration to additi... | 11/21/1995 |
| 5452740 | Water conservation system A water conservation system including a thermostatically controlled valve means effectively diverts water from the hot water tank to a storage tank until the temperature or the water therefrom reaches a predetermined temperature. The stored water is then ... | 09/26/1995 |
| 5148830 | Flow control device A flow control device including a body having an annular flange formed in a middle portion, a pair of sealing rings engaged on the body, two apertures formed in the body and located between the sealing rings, a plug and a spring received between the annul... | 09/22/1992 |
| 5103867 | Active reed valve An active reed valve for a fluid passage comprising a sealing means sealingly fixed to the passage walls, and a primary petal seat having a primary seat port and a downstream primary seat end. A flexible primary petal is sealingly attached to the primary ... | 04/14/1992 |
| 4964567 | Expansion and check valve combination This combination expansion valve and check valve (18) includes a valve body (22) having an inlet (24) and a outlet (26). A control valve (28) is disposed between the inlet and the outlet which controls flow through the valve when refrigerant flow is norma... | 10/23/1990 |
| 4928731 | Aircraft toilet tank filling valve assembly A toilet tank filling valve assembly to be mounted on an aircraft (10) includes an elongated main body (32) for defining an elongated passage (34) and first and second longitudinally spaced lateral passages (36 and 38). A one piece elongated bypass casing... | 05/29/1990 |
| 4836245 | Control valve A control valve including a change-over poppet formed into a substantially cylindrical shape, a guide pipe inserted into the change-over poppet, and a load check poppet slidably fitted on the guide pipe. The change-over poppet is formed with a communicati... | 06/06/1989 |
| 4708084 | System for distributing water flow between a reservoir and a water source A water distribution system for directing water flow between a live well in a fishing boat and a water source, such as a lake. The water distribution system includes a flow directing valve which has two operating conditions. In the first operating conditi... | 11/24/1987 |
| 4681297 | Adjustable pressure regulating solenoid valve A pressure regulating solenoid valve is disclosed which comprises a valve body having a flow path therethrough having an inlet and an outlet. The valve body has a main valve seat within the flow path, and a main valve member mounted within the valve body ... | 07/21/1987 |
| 4637426 | Fill control valve A valve which is used to control the gravity-feed filling of containers by selectively permitting certain fluids to escape from the container while the container is being filled thereby controlling the amount of material which is admitted to the container... | 01/20/1987 |
| 4498497 | Flow meter bypass valve assembly A bypass valve assembly is disclosed for use with a fluid flow meter of the type having a housing, an inlet, an outlet, a fluid passage which fluidly connects the inlet to the outlet and a flow rate responsive member within the fluid passage. The bypass v... | 02/12/1985 |
| 4440275 | Check valve for automotive braking system A check valve in an automotive braking system between the master cylinder and a wheel cylinder includes a screw or a piston mounted in the check-valve housing for overriding or opening the valve prior to a charging or filling operation to facilitate an ev... | 04/03/1984 |
| 4413975 | Combination control with high/low pilot gas flow A combination control for main and pilot burners of gas burner apparatus wherein a thermostatically controlled redundant simultaneously controls the supply of gas to pilot burner and main burner gas outlets. A pilot flow passage has a first branch passage... | 11/08/1983 |
| 4380250 | Choke unit In an adjustable choke a restricted choke fluidway takes the form of a groove in the axial face of a plate sealingly resting against a fixed plate, the groove having a cross-section changing along its length. Fluid is let into one end of the groove throug... | 04/19/1983 |
