Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7175772 | Small scale actuators and methods for their formation and use An actuator assembly and method for making and using an actuator assembly. In one embodiment, the assembly includes an actuator body having an actuator channel with a first region and a second region. An actuator is disposed in the actuator channel and is movable wh... | 02/13/2007 |
| 7028976 | Closure element, especially a valve cone for a continuous pressure valve A closing body is mounted in an axially displaceable manner in a bore of a fluidic valve to control a pressure medium flowing via the valve. The closing body has a sealing section, interacting with a seating edge of valve, and a guide section which serves to guide t... | 04/18/2006 |
| 6964154 | Axisymmetric, throttleable non-gimballed rocket engine A rocket engine assembly is provided for a vertically launched rocket vehicle. A rocket engine housing of the assembly includes two or more combustion chambers each including an outlet end defining a sonic throat area. A propellant supply for the combustion chambers... | 11/15/2005 |
| 6920890 | Airflow controller The invention provides an airflow controller for a propulsion inlet system including a bleed section having two or more bleed plenum chambers, each of the chambers having a porous inlet surface and an exit surface and two or more plates slidably mounted to the bleed... | 07/26/2005 |
| 6688332 | Multiway valve for switching a flow of fluid under pressure with parallel disposition of valve bores, and valve assembly kit A multiway valve for controlling a flow of fluid under pressure, includes a valve housing having fluid ports and a plurality of bores in side-by-side parallel disposition substantially at a same level. Each bore is configured for accommodation of a valve ... | 02/10/2004 |
| 6612335 | 3-Way control valve A 3-way hydraulic valve comprising a body formed with an inlet port for connecting to a pressurized supply line, a first outlet port for connecting to an outlet line and being in flow communication with the inlet port, a gate intermediate the inlet port a... | 09/02/2003 |
| 6584767 | Exhaust diverter An exhaust diverter for selectively attenuating exhaust volume includes a first pipe for fluidly coupling to and positioning between the engine and the muffler. A second pipe has a first end and a second end. The first end of the second pipe is fluidly co... | 07/01/2003 |
| 6453725 | Gas chromatograph sample and column-switching valve A multiport, diaphragm sealed valve suitable for use as both a sampling and column switching valve. The valve is constructed to internally block fluid communication between one or more pairs of ports in a valve operating mode. Such blocking may be used to... | 09/24/2002 |
| 6240956 | Remote controlled drinker system A poultry drinker system includes a number of drinker lines each supplied from a common high pressure water supply through a water pressure regulator. Each regulator includes a reference spring establishing a default minimum water pressure. A centralized ... | 06/05/2001 |
| 6085791 | Close-off and connecting unit for hydromassage orifices The present invention is a device which includes a connecting coupling for connection with hydromassage water circulation pipes, the connecting coupling having first coupling portion with a first aperture connected with an inlet of a hydromassage orifice,... | 07/11/2000 |
| 5934326 | Pressure regulating valve A pressure regulating valve is provided with a first valve for opening and closing a flow channel between a fluid pressure source and a reservoir, and a second valve for opening and closing a flow channel between an output chamber and the reservoir in ord... | 08/10/1999 |
| 5758683 | On/off circuit for a hydraulic system An on/off, protective circuit has a pressure line with an inlet for connection to a pressure source and an outlet for connection to the pressure port of a hydraulic system, such as a reciprocating conveyor. A relief valve is spring biased into a closed po... | 06/02/1998 |
| 5749517 | Control system for snow making devices A snow making system which includes a snow making device adapted to produce a spray of artificially manufactured snow from a combination of compressed air and water supplied under pressure to the device from remote compressed air and water supplies. A con... | 05/12/1998 |
| 5718378 | Control system for snow making devices A snow making system which includes a snow making device adapted to produce a spray of artificially manufactured snow from a combination of compressed air and water supplied under pressure to the device from remote compressed air and water supplies. A con... | 02/17/1998 |
| 5709262 | Electronic valve for cooling semiconductor processing equipment An improved system and apparatus is provided for cooling the energy source used in powering various types of semiconductor processing devices. The improved cooling system uses a solenoid valve which is electrically controlled by the processing equipment d... | 01/20/1998 |
| 5372424 | Screw mixer, particulary for foundry molds A mixer of the type comprising an axle (2) such as a screw rotatably mounted within a trough (1) is characterized in that the rotatable axle (2) has at its periphery at least one opening comprising an injection point (21) or distribution point of at least... | 12/13/1994 |
| 5156504 | Machine tool fluid-feed assembly with distributing valve A rotary feed system for a machine tool capable of feeding, for example, an off-center or a centrally-supplied tool with a coolant, has at the downstream end of a shaft delivering a fluid medium, a rotary distributing valve which is actuated by a fluid, e... | 10/20/1992 |
| 5131426 | Valving system for water flow to turbine engine emission system An improved valve for controlling flow of water to a turbine engine is disclosed. A hydraulically actuated spool valve controls the volume of water flow. An inventive seal and drain system ensures that no hydraulic oil mixes with the water being directed ... | 07/21/1992 |
| 5038827 | Shuttle valve for a refrigeration system A shuttle valve (10) for use in a dual refrigerator system (100) and operated by controlled refrigerant pressure lines (120, 122) to provide that either one or both of two evaporators (104, 106) are active. The valve (10) includes piston chambers (30) at ... | 08/13/1991 |
| 5013235 | Stack injection molding melt transfer apparatus A stack molding apparatus wherein the injection nozzles are disposed in pairs of coaxial nozzles in a housing between two sets of injection molds. The reciprocable valving elements of the injection nozzles of each pair are coaxial with each other and are ... | 05/07/1991 |
| 4957221 | Air tight storage silo A improved silo is provided having a pair of pivoting receiver gates overlying a pair of receiver openings and a pair of pivoting discharge gates overlying a pair of discharge openings. A deformable seal is secured to the silo between the receiver opening... | 09/18/1990 |
| 4930401 | Valve system and arrangement for on-line valve replacement Several embodiments are disclosed of an automatic shutoff valve apparatus for permitting removal, repair, or replacement of a control valve from a mounting base without deactivating a complete system. In addition, a redundancy arrangement is disclosed whe... | 06/05/1990 |
| 4858651 | Control valve for construction equipment A control valve for construction equipment adapted to operate a control mechanism in which a central by-pass passage is provided with a pilot pressure generating mechanism such as an orifice or the like and which is adapted to generate a pilot pressure du... | 08/22/1989 |
| 4846226 | Color changer A modular color changer provides selected paint colors for spraying and recirculates nonselected colors. A module is provided for each paint color to be selected, and each module has an inlet for connection with a respective supply of paint, a recirculate... | 07/11/1989 |
| 4828024 | Diverter system and blowout preventer A system is disclosed which may alternatively be used as a diverter or as a blowout preventer for a drilling rig. The system comprises a blowout preventer attached above a spool having a hydraulically driven sleeve/piston. An outlet flow passage in the sp... | 05/09/1989 |
| 4795130 | Piston biasing means A piston biasing means including, a coil-type spring, adapted to exert pressure on one side of a piston to be biased in a predetermined direction, a spring retaining means which is slidable toward and away from the piston when the spring is compressed and... | 01/03/1989 |
| 4778083 | Mixing and dispensing apparatus An apparatus for mixing and dispensing fluid components includes a mixing chamber for mixing reactive components prior to dispensing the components. The components are provided through separate valves to ducts in fluid communication with inlets to the mix... | 10/18/1988 |
| 4651369 | Cellular element In a cellular element the individual cells (1) are connected via a narrowed passage (2) to another cell or to a duct (3), which can be connected via a valve to a first pressure source. Hollow, expansible bodies (4) of an elastic, yielding material are pla... | 03/24/1987 |
| 4646373 | Cellular element In a cellular element, e.g. an air mattress, the individual cells (1) are connected via a narrow passage (2) to a duct (3) which can be connected via a valve to a first pressure source. In each cell (1) a body (4) is placed, bearing against the mouth of t... | 03/03/1987 |
| 4640308 | Fluid control valve For application in controlling fuel flow to a gas turbine engine, the control valve includes one or more fuel inlet manifolds, a fuel outlet manifold and a fuel drain manifold in fuel flow relation with a longitudinal bore in a valve sleeve. A hollow spoo... | 02/03/1987 |
| 4633903 | Distributing control valve with hydraulic control A 4/2 type distributing control valve characterized by compactness, ruggedness and high sampling frequency, the valve comprising two index plates (6, 7), each having teeth about its perimeter, provided with axial switching bores (8, 9, 10, 11). The two sw... | 01/06/1987 |
| 4570859 | Foam dispenser for glass mat substrate A dispenser is disclosed, the dispenser comprising a head adapted with one or more expandable members to regulate the quantity of flow from the head.... | 02/18/1986 |
| 4566635 | Fuel injection nozzle for internal combustion engines A fuel injection nozzle for internal combustion engines, having a valve needle, which at the end of a pre-stroke directly or indirectly opens an auxiliary conduit, by way of which the fuel pressure acts upon a reservoir piston and a pressure shoulder whic... | 01/28/1986 |
| 4531544 | Fire flap arrangement A fire flap arrangement for installation in a flow channel comprises a housing with opposite front walls and openings in the front walls. A pair of fire flaps are pivoted in said housing and held by means of permanent magnets in rest positions outside of ... | 07/30/1985 |
| 4502534 | Flow diverter Apparatus adapted for connection to a drilling conduit beneath a drilling rig floor for diverting pressurized well bore fluid in the conduit from the rig and sealing the annulus between a pipe or other object and the conduit or closing the vertical flow p... | 03/05/1985 |
| 4462425 | Backflushing system A backflushing system capable of being used with an automatic milking device is the subject of this patent application. The system includes a control cam (54) which can be moved linearly to effectuate the various functions. The cam (54) has formed thereon... | 07/31/1984 |
| 4460017 | Four-way valve A flow diversion valve having first and second tubular spool housings joined at a contiguous edge to form an assembly, each of the housings having a flow passageway intermediate the housing ends, the passageways being opposite each other, and each of the ... | 07/17/1984 |
| 4456062 | Flow diverter Apparatus is disclosed which is adapted for connection to a drilling conduit beneath a drilling rig floor for diverting pressurized well bore fluid in the conduit from the rig and sealing the annulus between a pipe or other object and the conduit or closi... | 06/26/1984 |
| 4444250 | Flow diverter Flow diverter apparatus is disclosed having a housing and a piston and annular packer disposed therein. The diverter has passages in the piston and housing walls providing fluid communication between the borehole and a vent line. A valve in the vent line ... | 04/24/1984 |
| 4442861 | Valve for gas centrifuges The invention is a pneumatically operated valve assembly for simultaneously (1) closing gas-transfer lines connected to a gas centrifuge or the like and (2) establishing a recycle path between two of the lines so closed. The valve assembly is especially d... | 04/17/1984 |
