Polymer control valve
Patent 4623002 Issued on November 18, 1986. Estimated Expiration Date: 
March 25, 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.
March 25, 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 916403 3123091 3771562 Timed flow control valve assembly Patent #: 4522221 InventorsAssigneeApplicationNo. 06/715630 filed on 03/25/1985US Classes:137/625.48, Reciprocating valve unit137/340, Circulating fluid in heat exchange relationship251/118, WITH MATERIAL GUIDE OR RESTRICTOR251/366BodiesExaminersPrimary: Rosenthal, ArnoldAttorney, Agent or FirmInternational ClassesF16K 49/00 (20060101)F16K 11/044 (20060101) F16K 11/02 (20060101) B01J 4/00 (20060101) AbstractA valve for controlling or diverting the flow of relatively viscous flowable materials such as polymers or the like. The valve includes a valve plug mounted for longitudinal movement within a valve chamber which receives the flowable material. A pair of antechambers flank the valve chamber, and a pair of portals connect the valve chamber with each antechamber. The valve plug selectably blocks one or the other of these portals, depending on the longitudinal position of the valve plug. A wall of each antechamber is angled to divert incoming flowable material toward the outflow passages individually leading away from the antechambers. | |
