Back to results
US 2015/0083947 A1Published application
Back pressure regulation
AssigneeWaters Technologies Corporation
InventorsJoshua A. Shreve, Edwin Denecke, Robert A. Jencks
Life of this patent
Estimating the term…
Abstract
The invention generally provides a dynamic back pressure regulator. In an exemplary embodiment, the back pressure regulator includes an inlet, an outlet, a seat disposed between the inlet and the outlet and defining at least part of a fluid pathway, and a needle displaceable relative to the seat to form a restriction region therebetween for restricting fluid flow between the inlet and the outlet. In some embodiments, the needle can include a corrosion and/or erosion resistant polymer tip.
Claims25
A dynamic back pressure regulator comprising:
- an inlet,
- an outlet,
- a seat disposed between the inlet and the outlet and defining at least part of a fluid pathway;
- a needle displaceable relative to the seat to form a restriction region therebetween for restricting fluid flow between the inlet and the outlet,
- wherein the needle comprises a corrosion and erosion resistant polymer tip.
2 more elements
25-43. (canceled)
Dependencies are inferred from the claim text.