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| Number | Title | Issue Date |
| 7082827 | Leak detector An example of an apparatus for detecting the lowering of a top surface of a liquid includes a housing that has a housing hole, and an insertion member attached to the housing. A dowel is inserted into the housing hole, and a float is attached to the dowel. A detecto... | 08/01/2006 |
| 6961966 | Toilet overflow prevention device A toilet overflow prevention device including an overflow valve assembly, a control valve and a water level sensor. The overflow valve assembly is configured to selectively permit a flow of water through the valve assembly from the tank to the bowl of an associated ... | 11/08/2005 |
| 5986597 | Fluid transfer controller with digital bitstream monitor A fail-safe fluid transfer control apparatus has full redundancy in the response to various inputs such as overfill probe signals, ground detection signals, and the like. Independent microprocessor controllers independently evaluate the inputs and each ou... | 11/16/1999 |
| 5878775 | Toilet valve assembly A toilet having a water inlet valve apparatus has a flush tank with a water inlet tube connecting from a water source into the flush tank. A water cutoff is attached to the water inlet tube and has a valve seat in a floating valve element positioned in th... | 03/09/1999 |
| 5785100 | Liquid level detection system A liquid retention system is disclosed which includes a tank for receiving and retaining a liquid, and including a filling port. A dispenser supplies liquid to the tank through a nozzle which engages the filling port. A pneumatic detection system is provi... | 07/28/1998 |
| 5440765 | Revised automatic water shut off for stuck open flush valves in toilet water tanks The automatic shut off for stuck open flush valves in toilet water tanks and water saver device depicted herein consists of a simple mechanism for installation in the water tank of a conventional water flush toilet, underneath the ball float, to provide a... | 08/15/1995 |
| 5421038 | Refilling preventing system for a toilet tank A refilling preventing system for a toilet tank, to prevent refilling of the tank in case of a leak, comprising: a receptacle in the tank in which the buoyant float of the fill valve is placed; a water filling conduit to fill the receptacle after a flush ... | 06/06/1995 |
| 5408705 | Toilet water reservoir valve utilizing float and hydraulic activators A toilet water reservoir inlet and outlet control valve utilizing a float and hydraulic activator. Both function simultaneously. Whenever the user flushes the toilet he will activate such valve, which will open to fill the reservoir with water, and the hy... | 04/25/1995 |
| 5398722 | Automatic control valve and method A compact, self-contained, automatic flow control and venting apparatus for the automatic interruption of liquid flowing into a liquid storage receptacle during the refilling process is disclosed wherein a dual-chambered, offset valve mechanism is control... | 03/21/1995 |
| 5282280 | Toilet water reservoir inlet and outlet control valve A water conserving refill valve for a reservoir connected to a pressurized water supply. The valve includes a hollow body divided by a diaphragm into a first and second chamber and a hollow plunger extending through the diaphragm between the chambers. The... | 02/01/1994 |
| 5095937 | Two stage automatic shut off valve A two stage float actuated shutoff valve for use in underground fuel storage tanks having a co-axial vapor recovery system utilizes a drop tube co-axially mounted within the storage tank fill pipe. Fuel flowing into the tank is passed through the drop tub... | 03/17/1992 |
| 5010915 | Two stage automatic shut off valve A shut off valve assembly for preventing overfilling of an underground fuel storage tank or other storage tanks where the incoming flow is not metered, utilizes a two stage valve closure, the first stage closure signaling the tank is nearly filled to capa... | 04/30/1991 |
| 4993086 | Emergency shut-off mechanism for flush tank An emergency shut-off for a flush tank having a liquid replenishment valve is connected to the liquid replenishment valve for moving the valve to a closed position if liquid level in the tank has not reached a predetermined height within a predetermined t... | 02/19/1991 |
| 4901377 | Toilet bowl automatic flow shut off and water saver device The toilet tank automatic water flow shut off for stuck or defective flow valves and water saver device depicted herein consists of a simple mechanism for installation in a water tank of a conventional water flush toilet, underneath the ball float, to pro... | 02/20/1990 |
| 4852053 | Material and energy balance reconciliation A method for controlling a system parameter based on controlling a setpoint for a process control variable includes measuring the rate of input to and output from a vessel. The difference between the input and output rates is determined to provide an expe... | 07/25/1989 |
| 4830040 | Automatic swimming pool cover drainer A float controlled siphon discharge valve mechanism operates to drain water from a swimming pool cover, and includes a lever arm attached at one end to a hinge and having a float on the other end so that the lever is of the second or third type. A closure... | 05/16/1989 |
| 4706310 | Liquid level control system The invention is directed to a liquid level control system which can be installed within an automatic pool reservoir surface skimmer or separately within or external of the reservoir which includes a primary float valve which allows liquid to flow into a ... | 11/17/1987 |
| 4592098 | Liquid level control system The invention is directed to a liquid level control system which includes a primary float valve which allows liquid to flow into a pool reservoir when the level of fluid in the reservoir is below a first predetermined level and a secondary float valve ass... | 06/03/1986 |
