Showerheads
Patent 4145004 Issued on March 20, 1979. Estimated Expiration Date: 
October 13, 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.
October 13, 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 514952 3103941 3358934 3713587 3762682 3788553 3831860 3902671 Selectable multiple-nozzle showerhead Patent #: 3998390 InventorAssigneeApplicationNo. 05/841829 filed on 10/13/1977US Classes:239/499, Chamber-like deflector137/625.3, With metering feature137/625.31, Rotary239/540, Disc type239/563, Sequential control of outlets239/581.1, Rotary valving251/350, Detachable tip251/352, Rotary285/261BALL AND SOCKETExaminersPrimary: Reeves, Robert B.Assistant: Kashnikow, Andres International ClassesB05B 1/14 (20060101)B05B 1/28 (20060101) B05B 1/30 (20060101) B05B 1/16 (20060101) AbstractA showerhead of the type including an inlet end, an outlet end, and a bore defining a passage between the two. Two discs are disposed in the passage, in face-to-face engagement with each other and mounted for relative rotation about a central axis. A plurality of orifices, arranged with their centers spaced at regular intervals around a circle of predetermined diameter, extend through each disc. Each orifice of the downstream disc defines a small port at the downstream face and a large port at the upstream face of the disc. Each orifice through the upstream disc defines at its downstream face a port that communicates with but is smaller than a respective port at upstream face of the downstream disc. | |
