Patent References 341515 1187607 2301355 2858697 3587515 3851526 Adjustable choke Patent #: 4047695 InventorsAssigneeApplicationNo. 06/529057 filed on 09/02/1983US Classes:73/203With valved proportioning meansExaminersPrimary: Goldstein, HerbertAttorney, Agent or FirmInternational ClassG01F 5/00 (20060101)AbstractA frusto-conical adjustable laminar flow bypass restrictor which is disposed within a conically tapering bore to form a conduit capable of maintaining laminar flow and adjustable to form annuli of varying thicknesses to allow proper sensor calibration over a wide range of flow rates. | |