Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7926511 | Toilet fill valve with valve lock Disclosed are various embodiments of a lockable toilet fill valve and methods according to the present invention. In one embodiment, a toilet fill valve includes a float/arm assembly. The toilet fill valve is closed when the float/arm assembly is disposed in a first... | 04/19/2011 |
| 7870868 | Water conservation kit An apparatus and method for capturing filtered rainwater during wet weather, storing the filtered rainwater in an elevated storage tank, conveying the filtered rainwater by gravity to a toilet tank and controlling its introduction into the toilet tank. The apparatus... | 01/18/2011 |
| 7392822 | Liquid level controller and pilot switch A liquid level controller including a pilot valve switchable between snap and throttle modes. A displacer translates changing liquid level in a tank into movement that is transferred to the pilot valve which will provide output gas to a control valve to allow or to ... | 07/01/2008 |
| 7357149 | Auxiliary fuel tank systems for aircraft and methods for their manufacture and use Auxiliary fuel tank systems for aircraft and methods for their manufacture and use. In one embodiment, an aircraft can include a fuselage, at least one engine, and a fuel system configured to distribute fuel to at least one of the engine and an aerial refueling mani... | 04/15/2008 |
| 7331365 | Lavatory service shut-off valve A shut off valve (10) is provided for use in an aircraft lavatory system (70) during maintenance sanitizing operations. The shut off valve includes an inlet passage (20) in intermittent fluid communication with an outlet passage (30) and ... | 02/19/2008 |
| 7284567 | Liquid level controller A liquid level controller for maintaining the level of liquid in a tank at a predetermined height includes a housing with an upper and lower section wherein the upper section is connected to a liquid supply and the lower section is submerged in liquid the level of w... | 10/23/2007 |
| 7204143 | Liquid level controller An apparatus and methods of using the apparatus are disclosed. Preferably, the apparatus includes at least a fluid level detection portion communicating with a fulcrum that provides at least a first lobe and a second lobe, and a control portion responsive to the fir... | 04/17/2007 |
| 7201178 | Continuous chemical feeder and method of use thereof A method of providing a continuous, sequential, and cyclic, if desired, liquid feed to a processor from a plurality of containers, which comprises feeding the liquid from a first of the containers through a first conduit to a reservoir having a float valve, to keep ... | 04/10/2007 |
| 7174912 | Shut-off valve assembly A shut-off valve assembly for regulating the flow of fluid through or from a fluid line. The assembly comprises: a body attachable to or within a fluid line and having a chamber therein with inlets and an outlet for fluid from the fluid line; a valve seat that provi... | 02/13/2007 |
| 7171976 | Steam trap with float Provided is a steam trap, in which an inlet and an outlet in a body are formed collinearily and a float for opening/closing the outlet is included. The steam trap having a float within a case includes the case, a cover, a strainer, the float, an arm, a gate, a lever... | 02/06/2007 |
| 7128102 | Drop tube segments adapted for use with a liquid reservoir A drop tube segment includes a conduit with a first end portion and a second end portion. The drop tube segment further comprises a valve assembly with a valve member associated with the first end portion, a float, and a linkage device pivotally connected with respe... | 10/31/2006 |
| 7096880 | Float type steam trap There is provided a float type steam trap having a casing having a float chamber formed with an inflow port and an outflow port. A holder has a flow path communicating with the outflow port. A valve seat on the holder communicates with the outflow port. A float has ... | 08/29/2006 |
| 7089974 | Float operated overfill protection device A fuel storage tank includes an overfill protection device for shutting off the flow of fuel into the tank via a fuel fill tube when the contents of the tank reach an intended maximum fill level. The overfill protection device includes a butterfly valve located with... | 08/15/2006 |
| 7082962 | Seal support system for maintaining barrier fluid pressure within a mechanical seal An intelligent seal support management system includes a device for automatically compensating for increased heat or decreased heat in a vessel. ... | 08/01/2006 |
| 6966334 | Float valve for a christmas tree watering system The float valve has a water inlet, a perforated bottom surface and a lift valve mounted between the water inlet and the bottom surface. A float and a rocker arm are used to raise and lower the disc of the lift valve in response to a water level inside the housing. T... | 11/22/2005 |
| 6953050 | Float, particularly for level control in bottles of liquefied gas and the like A float, particularly for level control in bottles of liquefied gas and the like, comprising a float body associated with an element for connection to a valve unit, the float body being constituted by an internally hollow element made of plastics whose shape is defi... | 10/11/2005 |
| 6938633 | Method and apparatus for supplying process liquid for machine tool The present invention provides a method and apparatus for supplying process liquid s for a machine tool, which are able to reduce the consumption power and power factor of the pump 21 to a large extent in comparison with prior arts while maintaining the effec... | 09/06/2005 |
| 6913047 | Drop tube assemblies adapted for use with a liquid reservoir Drop tube assemblies are provided and adapted for use with a liquid reservoir. One exemplary drop tube assembly includes a first conduit, a second conduit and a valve assembly. The valve assembly includes a valve member, a float, and a linkage device pivotally conne... | 07/05/2005 |
| 6874529 | Level limit valve The invention concerns a level limit valve for the fuel tank of a vehicle. Such valves serve the purpose, that upon the filling of the fuel tank, the filled quantity of the fuel is limited. The proposed level limit valve possesses a valve body 1 which can be ... | 04/05/2005 |
| 6837264 | Toilet fill valve with valve lock Various toilet valves and methods are described that provide for locking of the toilet filled in a closed state. In one embodiment, a toilet fill valve is provided having an actuating arm. The toilet fill valve is closed when the actuating arm is disposed in a first... | 01/04/2005 |
| 6783330 | Self-priming centrifugal pump A priming vacuum control system for use on a self-priming pump includes a priming vacuum control valve and a priming vacuum control valve-actuating system. The priming vacuum control valve is disposed between a vacuum pump and a priming chamber for the self-priming ... | 08/31/2004 |
| 6763845 | Water freeze prevention device An automatic water freeze prevention device having a first valve, second valve and third valve that cooperate to fill or drain a water utilization device according to pre-selected temperature conditions. These three valves are driven to their respective open/closed ... | 07/20/2004 |
| 6739584 | Float apparatus of carburetor To prevent a fuel liquid surface within a float chamber from rising when a liquid surface change occurs to make a float rotate so that a float valve opens a valve seat hole, a first float (F3) is arranged in one outer side from one end (F4) of the bear... | 05/25/2004 |
| 6591861 | Closed water-container storing device with water inlet/outlet A closed water-container storing device with the water inlet/outlet, comprising a water storing bag container for storing water, a water inlet for the inflow of water from outside source to said water storing bag container, a water outlet for outflow of w... | 07/15/2003 |
| 6581621 | Valve and fuel tank provided with a valve for a motor vehicle The invention relates to a valve and a fuel tank provided with a valve for a motor vehicle. Bleeder valves for integrated compensation volumes for fuel tanks are known in the prior art. One disadvantage of known valves is that if the tank is filled slowly... | 06/24/2003 |
| 6523405 | Portable bin full indicator A portable bin full indicator is disclosed comprising a sensor operable to send a signal when the level of particulate material in a bin reaches the level of the sensor; means to temporarily secure the sensor in a top portion of the bin; an alarm operativ... | 02/25/2003 |
| 6415813 | Shut-off valve for a tank A shut-off valve for a tank, including a filling tube with a filling-side valve seat and a tank-side valve seat. The seats being spaced apart from one another in a throughflow direction of the filling tube. A valve body with a sealing element is movable b... | 07/09/2002 |
| 6370708 | Toilet tank anti-refill device A combination of a toilet and an anti refill device, the toilet comprises a bowl, a tank connected to the bowl for storing water and to supply the stored water to the bowl, a flushing structure which releases water from the tank into the bowl, a supply va... | 04/16/2002 |
| 6363962 | Crash valve actuator A crash valve is located in a liquid tight dispenser pan at a gasoline service station to close a conduit conveying gasoline to a gasoline dispensing unit to prevent uncontrolled flow of gasoline in the event a vehicle crashes into the dispensing unit. Th... | 04/02/2002 |
| 6045336 | Pump and valve for leachate extraction of heavier than water fluids In combination with a pump, a valve for operation at the interface between underlying heavier liquid and overlying lighter liquid is disclosed. The valve includes an inlet within the heavier liquid communicated from a valve seat to a conduit which typical... | 04/04/2000 |
| 6006779 | Fluid cutoff system A fluid cutoff system for preventing fluid flow through a hose whenever a desired amount of fluid has been deposited onto an area is comprised of a tube having a valve therein. An accumulator has a float floatably disposed therein with an extension attach... | 12/28/1999 |
| 5992448 | Liquid level controller A liquid level controller is shown having a housing with a rear wall. A shaft has a first end which extends through the rear wall to a liquid displacement member located within a liquid containing vessel. A second end of the shaft joins a pair of opposite... | 11/30/1999 |
| 5967175 | Waste line stoppage detector and automatic water shutoff system A waste line stoppage detector and automatic water shutoff system is utilized to prevent the overflow of raw sewage from a plumbing fixture. Electronic shutoff valves are electronically connected to a waste line stoppage detector. One application involves... | 10/19/1999 |
| 5916489 | Float for carburetors A float of synthetic resin for carburetors includes a base having a mounting portion for mounting the float in a float chamber; two float parts arranged opposite to each other, swinging in accordance with an amount of fuel in the float chamber; and an arm... | 06/29/1999 |
| 5904176 | Silent valve ball cock assembly A float-controlled, ball cock assembly comprises an improved two-piece valve useful with either a fixed height or an adjustable height riser. The two-piece valve includes a resilient valve seal element and a rigid valve cap fitted together to form an annu... | 05/18/1999 |
| 5896887 | Pinch tube tank level control valve with snap-action shutoff A liquid level control apparatus for a flush tank includes an upstanding fill tube integral at its upper end with a valve housing carrying a flexible resilient pinch tube valve member and a pivoting actuator engageable with the pinch tube for opening and ... | 04/27/1999 |
| 5685331 | Oil level regulator An oil level regulator is provided for controlling the oil level in the crankcase of one or more refrigeration compressors or the like. The regulator has a closed chamber for containing the oil. An inlet valve assembly extends into the chamber and include... | 11/11/1997 |
| 5660214 | Overfill prevention for liquid storage tanks A liquid storage tank overfill prevention assembly that includes an outer housing, an insert that includes fill flow ports, a shut-off sleeve to slowly close off the flow ports and a float member for controlling the sleeve in response to the rise of the s... | 08/26/1997 |
| 5655232 | Fluid level control device and method A water level control device has connected tubular housings, one serving as a support for a hose connection and the other serving to house a float assembly for operation of a ball valve within the valve housing. An airtight float serves to raise the one e... | 08/12/1997 |
| 5582601 | Cassette for receiving aspirated fluids A cassette for collection of fluids in a fluid aspirating system which may be reusable after sterilization. The cassette includes vacuum aperture and an aspiration port along the top wall of the cassette. Aspiration tubing is connected to the aspiration p... | 12/10/1996 |
