Freezeless ground hydrant and method for operating same
Patent 4653521 Issued on March 31, 1987. Estimated Expiration Date: 
July 7, 2006. 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.
July 7, 2006. 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 609805 824770 2630130 2648349 3534762 3770000 3770003 Freezeproof sanitary water supply appliance Sanitary yard hydrant Freeze-proof, pollution free valve InventorAssigneeApplicationNo. 06/882728 filed on 07/07/1986US Classes:137/1, PROCESSES137/218, With co-acting valve in liquid flow path137/281, Expansible chamber operated by valve actuator for draining riser137/301, Protection against freezing137/302, Stop and waste251/111, Latch manipulator mounted on valve body251/231, Lever251/279, Linkage251/89WITH MEANS FOR BLOCKING OR DISABLING ACTUATORExaminersPrimary: Walton, George L.Attorney, Agent or FirmInternational ClassesE03B 9/00 (20060101)E03B 9/04 (20060101) E03B 9/14 (20060101) AbstractThe present invention is for a freezeless ground hydrant having a nozzle above ground and having a main valve adapted to be connected to an underground source of water pressure at a point located below the frost line in the soil. Also underground is a drain water storage system including a storage cylinder. When the hydrant is turned off, the residual water in the nozzle drains into the cylinder and is retained there until the hydrant is turned on again. When the hydrant is turned on, a mechanical linkage connected to the hydrant handle causes the cylinder to expel the drain water therein through a drain line which extends upwardly above the ground. | |
