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| Number | Title | Issue Date |
| 6241103 | Filter cartridge for water treatment device A water filter cartridge including an outer shell, an inlet opening proximate a first end, an outlet opening and a cam extending axially from the first end. Cam is constructed and arranged so as to reset a mechanical flow totalization mechanism in a water... | 06/05/2001 |
| 6103114 | Pour-through water treatment carafe A pour-through water treatment device. The device comprises a carafe, a pour tray including a lower portion, an outer lid, and an inner lid. The outer lid is sealed to and substantially covers a forward portion of the lower portion, and has a lip extendin... | 08/15/2000 |
| 5928504 | Faucet-mounted water treatment device A faucet-mounted water treatment device including a flow totalizer and an end-of-life indicator cooperating with the totalizer to tell the user when it is necessary to replace the filter cartridge. End-of-life indication is provided by a valve which stops... | 07/27/1999 |
| 5882507 | Water filter cartridge end-of-life mechanism A filter cartridge end-of-life mechanism and a filter cartridge assembly for a water treatment device. The end-of-life mechanism comprises a float which is moved along an escapement path each time the device is filled. A counting mechanism connected to th... | 03/16/1999 |
| 5785844 | End of life mechanism for water treatment cartridge An apparatus for use with a water treatment unit that indicates the end of life of the unit. The apparatus comprises a housing with at least one opening for the passage of liquid to a chamber, formed by the interior of the housing and the water treatment ... | 07/28/1998 |
| 5709794 | Low-cost portable water filter A low-cost portable water treatment device having a low-cost replaceable filter. The device includes a housing having an inlet, an outlet and a water filtration chamber. The replaceable filter is disposed in the water filtration chamber and comprises a di... | 01/20/1998 |
| 5536394 | End of life mechanism for water treatment cartridge An apparatus for use with a water treatment unit and in particular, those having a treatment cartridge, that indicates the end of life of the unit. The apparatus comprises a housing with at least one opening for the passage of liquid to a chamber, formed ... | 07/16/1996 |
| 5527451 | Water treatment device with volume totalization valve A water treatment device including an arrangement having mechanisms for mechanically totaling the volume of water filtered and for indicating when the replaceable filter cartridge has reached the end of its useful life. End-of-life indication is provided ... | 06/18/1996 |
| 5525214 | Filter cartridge for water treatment device A water filter cartridge including an outer shell, an inlet opening proximate a first end, an outlet opening and a cam extending axially from the first end. Cam is constructed and arranged so as to reset a mechanical flow totalization mechanism in a water... | 06/11/1996 |
| 5431908 | Method for preparing polyhalide resin disinfectants The invention provides a method for preparing polyhalide resin disinfectants. The step of the method involves circulating an effective amount of a polyhalide salt carrier solution between an effective amount of elemental halide and a strong base anion exc... | 07/11/1995 |
| 5268093 | Portable water purification system A manually operable water purification system which includes (i) a first container having an open end and an outlet orifice, (ii) a filter operably positioned within the first container for filtering contaminated water placed within the first container as... | 12/07/1993 |
| 5106500 | Portable water purification system including a filter cleaning mechanism A water purification system including both a filter and a body of biocidally active material for microbiologically purifying biologically contaminated water. The system provides for the production of microbiologically purified water during both upstroke a... | 04/21/1992 |
| 4945725 | Differential-area piston type mixed-phase motors Motor apparatus which converts hydraulic energy and change of state heat energy to mechanical energy. The motor includes a main chamber divided by a piston into first and second portions. During a first half cycle or hydraulic power stroke, a valve places... | 08/07/1990 |
| 4902207 | Energy recovery apparatus An energy recovery pump-motor including an energy recovery pump and a mixed-phase motor for replacing conventional valves in fluid circuits such as an absorption refrigeration system. The energy recovery pump pressurizes a first liquid by recovering flow ... | 02/20/1990 |
| 4793153 | Energy recovery apparatus An energy recovery pump-motor including an energy recovery pump and a mixed-phase motor for replacing conventional valves in fluid circuits such as an absorption refrigeration system. The energy recovery pump pressurizes a first liquid by recovering flow ... | 12/27/1988 |
