Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7431047 | Device for underpressure-activated dispensing of fluids The present invention regards an underpressure-activated valve mechanism for controlled dispensing of fluids, including liquid food articles, from a receptacle. When the user applies sufficient suction force (P2) across a pressure comparative diaphragm zone a... | 10/07/2008 |
| 7380568 | Water flow controller An apparatus for controlling water flow is provided. The apparatus is a novel electronic water controller capable of operation using a battery-type power source, and providing for achievement of long battery life. The apparatus generally comprises an electronic cont... | 06/03/2008 |
| 7377287 | Intermittent pressure module An intermittent pressure module for controlling the position of a valve between two positions comprising diaphragm means; a plurality of ports associated with said diaphragm means for exposing said diaphragm means to a selected pressure in said first position, and a... | 05/27/2008 |
| 7284565 | Fluid flow regulator for swimming pool cleaning system A fluid flow regulator useful with swimming pool suction cleaners includes a flow passage conduit for connection between a suction pump and the pool cleaner. A flow bypass conduit is connected to the flow passage conduit for injecting an ambient fluid into a bypass ... | 10/23/2007 |
| 7255127 | Vacuum regulator and intermittent flow device A vacuum regulator and intermittent flow device are disclosed. Vacuum regulation is achieved via spring forces acting on a movable piston-tube assembly disposed within a regulator body having a cylindrical hollow interior. Vacuum is supplied to an input port and reg... | 08/14/2007 |
| 7237567 | Vacuum valve A vacuum valve is disclosed. The vacuum valve comprises a body and a cylinder, mounted at the upper end of the body having a cavity including a piston, the center of the piston provided a piston rod extended into the cavity and the two sides of the body and the bott... | 07/03/2007 |
| 7182171 | Muffler with variable acoustic properties A muffler with variable acoustic properties. A pressure cell with a diaphragm, a spring, a piston, a piston rod, a closing element on the piston rod, and a pressure connection line are integrated into a housing. The diaphragm is thermally insulated against the pisto... | 02/27/2007 |
| 7171980 | Springless regulator valve assembly A valve assembly and a regulator for use therein are disclosed. The valve assembly includes a valve poppet having a first end having a first face and a second end having a second face. The first face has a surface area smaller than the surface area of the second fac... | 02/06/2007 |
| 7143773 | Intermittent pressure module for a vacuum regulator An intermittent pressure module for controlling the position of a valve between two positions comprising diaphragm means; a plurality of ports associated with said diaphragm means for exposing said diaphragm means to a selected pressure in said first position, and a... | 12/05/2006 |
| 7140389 | Vacuum producing device A vacuum producing device (1) possessing a principal suction nozzle unit (2) with a shut off valve (27) on the upstream side thereof and an additional suction nozzle unit (3) connected in parallel to the principal suction nozzle unit (... | 11/28/2006 |
| 7093612 | Self-sealing one-piece vacuum fitting for bagging of composite materials A vacuum fitting having a check valve for use in bagging composite parts prior to and curing the during process, in which the body of the vacuum fitting is formed from a single piece of material, and the check valve has no loose fitting parts is disclosed. The vacuu... | 08/22/2006 |
| 7089953 | Controlled pneumatic device for automatic inflating/deflating of a confinement capacity of a gas fluid under relative pressure The invention concerns a controlled pneumatic valve (1), for remote inflating and deflating of a capacity (2), comprising a membrane (17) maintained between a valve body (18), including orifices (24) and a cover (19); and de... | 08/15/2006 |
| 7047993 | Pilot switching valve apparatus and a method of switching pilot switching valve In a valve chest of the pilot switching valve, a positive pressure chamber and a negative pressure chamber are formed on opposite sides of a valve spindle making a reciprocating motion in the valve chest due to repulsion by a return spring, and by connecting a posit... | 05/23/2006 |
| 7017564 | Temperature-controlled PCV valve A positive crankcase ventilation valve includes a flow restrictor movable in an orifice to vary flow of fumes from a crankcase to an intake manifold in a vehicle. The valve also includes a wax motor for moving the flow restrictor in the orifice. ... | 03/28/2006 |
| 7013909 | Vacuum valve controller The present invention provides a vacuum valve controller for opening and closing a vacuum valve mounted on an end of a pipe of a vacuum system that is part of a vacuum sewage system. A vacuum valve controller includes a pressure sensor for converting a water level o... | 03/21/2006 |
| 6990997 | Fluid distribution device An apparatus and method for distributing a fluid. A fluid distribution device includes a flow chamber comprising an inlet and an outlet, an equalization chamber; and a diaphragm separating the flow chamber and the equalization chamber, wherein a valve positioned in ... | 01/31/2006 |
| 6945277 | Underpressure valve The invention concerns an underpressure valve with a multi-part housing and a disc-like closing body which has at least one opening, and with an opening-free section disposed in alignment with the flow channel of the housing. ... | 09/20/2005 |
| 6874484 | Fuel vapor vent system and low permeation vacuum operated shut-off valve therefor A vacuum operated flow control valve is disposed in the vapor vent line from a fuel tank to a vapor storage canister connected also to the engine air inlet. The valve has a diaphragm operator of low permeability which is biased normally open to permit fuel vapor to ... | 04/05/2005 |
| 6863083 | Vacuum demand flow valve A valve is disclosed for dispensing a flowable material. The valve has a first chamber (40) at a first pressure wherein said first chamber (40) defines an outlet (28) in communication with said first chamber (40). A second chamber (42 | 03/08/2005 |
| 6837258 | Vacuum operated sealed liquid accumulator A sealed liquid accumulator for accumulating a liquid in a box which is sealed to prevent the escape of odors from the interior of the box. The accumulator has an outlet tube for evacuating liquid from the interior of the box by way of a vacuum. A source of replacem... | 01/04/2005 |
| 6837257 | Valve device at dispensers The present invention relates to a valve device at dispensers which are adapted for dispensing portions of liquid or semi-liquid products (2), preferably foodstuff, from containers, and which have vacuum pumps (5) for generating a negative pressure in ... | 01/04/2005 |
| 6772787 | Vacuum regulator for maintaining a substantially constant vacuum in a vacuum system The invention relates to a vacuum regulator (1) for maintaining a substantially constant vacuum in a vacuum system (2). The vacuum regulator (1) includes a main valve arranged to control a supply of air to the vacuum system (2). The main ... | 08/10/2004 |
| 6763846 | Fluid distribution device An apparatus and method for distributing a fluid. A fluid distribution device includes a flow chamber comprising an inlet and an outlet, an equalization chamber; and a diaphragm separating the flow chamber and the equalization chamber, wherein a valve positioned in ... | 07/20/2004 |
| 6712095 | Vacuum demand valve A vacuum demand valve for delivering a flowable material is disclosed. The valve has a housing having a proximal end, a distal end, an intermediate segment therebetween defining a passageway wherein the flowable substance can flow from the proximal end to the distal... | 03/30/2004 |
| 6695279 | Pressure-responsive actuator In a pressure-responsive actuator, the inside of a case is divided into first and second air chambers by a diaphragm, and a coil spring is accommodated in the second air chamber for exerting a spring force for urging the diaphragm in a direction to decrea... | 02/24/2004 |
| 6684903 | Vacuum demand valve A vacuum demand valve for delivering a flowable material is disclosed. The valve has a housing having a proximal end, a distal end, an intermediate segment therebetween defining a passageway wherein the flowable substance can flow from the proximal end to... | 02/03/2004 |
| 6681812 | Attachment for a vacuum pump An attachment (3) for a vacuum gun (2), for introducing new coolant into a cooling system of a vehicle after spent coolant has been drained from the cooling system. The attachment (3) comprises: a body (4) having a first inlet (36) for air left in the coo... | 01/27/2004 |
| 6679288 | Vacuum demand valve A vacuum demand valve for delivering a flowable material is disclosed. The valve has a housing having a proximal end, a distal end, an intermediate segment therebetween defining a passageway wherein the flowable substance can flow from the proximal end to... | 01/20/2004 |
| 6672333 | Vacuum demand valve A vacuum demand valve for delivering a flowable material is disclosed. The valve has a housing having a proximal end, a distal end, an intermediate segment therebetween defining a passageway wherein the flowable substance can flow from the proximal end to... | 01/06/2004 |
| 6648011 | Vacuum demand valve A vacuum demand valve for delivering a flowable material is disclosed. The valve has a housing having a proximal end, a distal end, an intermediate segment therebetween defining a passageway wherein the flowable substance can flow from the proximal end to... | 11/18/2003 |
| 6604545 | Vacuum demand valve A vacuum demand valve for delivering a flowable material is disclosed. The valve has a housing having a proximal end, a distal end, an intermediate segment therebetween defining a passageway wherein the flowable substance can flow from the proximal end to... | 08/12/2003 |
| 6591863 | Adjustable pool safety valve A safety valve for swimming pools that senses and then instantly relieves excessively high vacuum levels in the pool's drain line. Such high vacuum levels occur when an individual becomes trapped by the suction at the pool's drain port which is connected ... | 07/15/2003 |
| 6554023 | Vacuum demand flow valve A valve is disclosed for dispensing a flowable material. The valve has a first chamber (40) at a first pressure wherein said first chamber (40) defines an outlet (28) in communication with said first chamber (40). A second chamber (42) is at a second pres... | 04/29/2003 |
| 6550493 | Vacuum demand valve A vacuum demand value (10) is capable of delivering a flowable material. The valve (10) has a housing (11) having a proximal end (14), a distal end (16), an intermediate segment (18) therebetween defining a passageway (24) wherein the flowable substance c... | 04/22/2003 |
| 6546958 | Multiple cavity valve plate with floating shoe for container labeling apparatus A multiple port valve plate assembly for use with a vacuum drum in a labeling apparatus. The valve plate has a first stationary vacuum cavity which is supplied with one level of vacuum suitable for picking up a label segment from a cutter with limited ten... | 04/15/2003 |
| 6537033 | Open loop control apparatus for vacuum controlled systems An open loop feedback control apparatus for a vacuum controlled system for providing vacuum stability within a predetermined range of vacuum levels is shown. The open loop feedback control apparatus includes a vacuum regulator having a diaphragm including... | 03/25/2003 |
| 6484743 | Flow control assembly Assemblies for control of fluid flow are described. The assemblies permit angular adjustment of resilient biasing mechanisms through translation of one of their ends along the assembly exteriors. Although the resilient mechanisms normally facilitate cover... | 11/26/2002 |
| 6473928 | Magnetic control valve for a suction powered pool cleaner A magnetic control valve is provided in a suction powered pool cleaner of the type for vacuuming dirt and debris from submerged floor and side wall surfaces of a swimming pool. The pool cleaner comprises a head defining a suction inlet for vacuum inflow o... | 11/05/2002 |
| 6470904 | Normally closed in-channel micro check valve In an embodiment, a check valve assembly may include an in-channel check valve connected between the front and rear portions of a channel attached to a silicon substrate. The channel may have a width between about 10 μm and about 400 μm, and the check v... | 10/29/2002 |
| 6467494 | Arrangement in a vacuum sewer system for preventing water entering a pneumatic controller through a breather line Arrangement and method for the prevention of water entering a pneumatic controller of a vacuum sewer system through a breather line. The proposed pneumatic controller is a non-bleeding controller preventing continuous flow of air from the breather line th... | 10/22/2002 |
