Liquid level control system
Patent 4592098 Issued on June 3, 1986. Estimated Expiration Date: 
May 10, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 10, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2581901 2803262 2842158 3040769 3574867 3727243 3908206 InventorApplicationNo. 06/732705 filed on 05/10/1985US Classes:4/508, And water level control137/389, With second diverse control137/400, With supplemental or safety closing means or bias4/496, Accessory4/507Including water inlet or outlet meansExaminersPrimary: Artis, Henry K.Attorney, Agent or FirmInternational ClassesE04H 4/12 (20060101)E04H 4/00 (20060101) AbstractThe 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 associated with the primary flow valve which shuts off the flow of fluid into the pool reservoir when the level of liquid in the pool reservoir exceeds a second predetermined level which is higher in elevation than the first predetermined level. The primary valve continually operates between open and closed states. The secondary valve is normally in an open state and when it is caused to go to a closed state it remains closed until it is manually reset. | |
