Multi-port backwash valve
Patent 4115276 Issued on September 19, 1978. Estimated Expiration Date: 
April 4, 1997. 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.
April 4, 1997. 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 2209989 2613056 3365064 InventorAssigneeApplicationNo. 05/783978 filed on 04/04/1977US Classes:210/425, Backwash137/625.29Valve with bypass connectionsExaminersPrimary: Cuchlinski, William A. Jr.Attorney, Agent or FirmInternational ClassesB01D 29/66 (20060101)E04H 4/00 (20060101) E04H 4/12 (20060101) F16K 11/06 (20060101) F16K 11/072 (20060101) AbstractA multi-ported backwash valve for a swimming pool and filter, comprises:(a) a valve rotor and a body having five ports communicating with the rotor, said ports including(i) a fluid inlet port,(ii) a first outlet port for fluid delivery to a container,(iii) a second outlet port for fluid delivery in a first selected path through filter means,(iv) a third outlet port for fluid delivery in a second selected path through filter means, and(v) a fourth outlet port for fluid delivery to discharge,(b) the rotor having an axis and the body having an internal wall, the inlet port located at the internal wall, the first, second, third and fourth ports spaced about said axis,(c) the rotor having a flow directing chamber to selectively place the inlet port in communication with the first through fourth ports, and other flow directing chamber structure to selectively and simultaneously intercommunicate pairs of the first through fourth ports. | |
