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| Number | Title | Issue Date |
| 6393635 | Galley waste disposal system and method A waste disposal system quietly and effectively evacuates solid, liquid, and slurry food waste from a galley sink via a vacuum action created when a normally closed flush valve momentarily opens and eliminates the differential pressure between the sink an... | 05/28/2002 |
| 6325356 | Long life rotary gate valve for aircraft vacuum toilet system A light weight gate valve and method for a aircraft vacuum toilet system. The valve resists jamming due to scale buildup, thereby reducing maintenance costs associated with repair or cleaning. The gate valve is intended for mounting between two portions o... | 12/04/2001 |
| 6226807 | System and method for a reduced water consumption vacuum toilet A system and method for reducing water consumption in a vacuum toilet on an aircraft. The system and method includes a weight sensing device that is mounted to an aircraft toilet and is responsive to weight applied to the bowl of the toilet. The weight se... | 05/08/2001 |
| 6223361 | Galley waste disposal system A waste disposal system quietly and effectively evacuates solid, liquid, and slurry food waste from a galley sink via a vacuum action created when a normally closed flush valve momentarily opens and eliminates the differential pressure between the sink an... | 05/01/2001 |
| 5404897 | System and method for preventing leakage of liquid waste from an aircraft waste tank during flight An aircraft waste storage system and method intended to avoid leakage of liquid waste from an aircraft waste holding tank through the tank outlet tube during flight. The system uses a valve movable from a position at a predetermined depth within the outle... | 04/11/1995 |
| 5232010 | Drain valve A drain valve is provided for connection to a water supply line for draining water in a vacuum flush aircraft sanitation system. The valve comprises a housing having a fluid inlet and a fluid outlet. The housing also includes a pressure chamber with a dia... | 08/03/1993 |
| 5178500 | Fastener with locking retainer ring A fastener and method for fastening panels is disclosed. The fastener comprises a bolt and a nut with a locking feature to prevent loosening of the fastener from vibration after it has been set. The locking feature comprises a frustoconical tip on the ins... | 01/12/1993 |
| 5035011 | Self draining sanitation system A drain valve is provided for connection to a water supply line for draining water in a vacuum flush aircraft sanitation system. The valve comprises a housing having a fluid inlet and a fluid outlet. The housing also includes a pressure chamber with a dia... | 07/30/1991 |
