Low carryover high pressure fluidic fitting
AssigneeWaters Technologies Corporation
InventorsRobert A. Jencks, Mark W. Moeller, Kenneth R. Plant
Life of this patent
Estimating the term…
Abstract
A fluidic coupling includes a compression screw having an axial bore, a threaded portion configured to engage a threaded bore of a coupling body, and a drive surface, a tube extending through the axial bore of the compression screw, the tube including a body and a fluidic channel extending through the body to a sealing end, the body including a pocket formed at the sealing end having a depth, a collet secured to an outer surface of the tube and having a first end configured to receive the drive surface of the compression screw, and a polymer seal having a channel to pass a fluid, the polymer seal including a flange portion and an insertion portion.
Claims20
A fitting for coupling fluidic paths, comprising:
- a coupling body having a threaded bore extending into a tapered cavity and, and an inner bore extending from the tapered cavity that is narrower than the threaded bore, the inner bore having a sealing surface at an end opposite to the tapered cavity, the coupling body having a channel extending from the sealing surface to pass a fluid;
- a compression screw having an axial bore, a threaded portion in engagement with the threaded bore of the coupling body, and a drive surface;
- a tube extending through the axial bore of the compression screw, the tube including a body and a fluidic channel extending through the body to a sealing end, wherein the body includes a pocket formed at the sealing end having a depth;
- a collet secured to an outer surface of the tube and having a first end configured to receive the drive surface of the compression screw;
- and
- a polymer seal having a channel to pass a fluid, the polymer seal including a flange portion and an insertion portion, wherein the insertion portion is located within the pocket of the body of the tube.
A fluidic coupling comprising:
- a compression screw having an axial bore, a threaded portion configured to engage a threaded bore of a coupling body, and a drive surface;
- a tube extending through the axial bore of the compression screw, the tube including a body and a fluidic channel extending through the body to a sealing end, wherein the body includes a pocket formed at the sealing end having a depth;
- a collet secured to an outer surface of the tube and having a first end configured to receive the drive surface of the compression screw;
- and
- a polymer seal having a channel to pass a fluid, the polymer seal including a flange portion and an insertion portion, wherein the insertion portion is located within the pocket of the body of the tube.
A method comprising:
- providing a fitting for coupling fluidic paths, the fitting including:
- a coupling body having a threaded bore extending into a tapered cavity and, and an inner bore extending from the tapered cavity that is narrower than the threaded bore, the inner bore having a sealing surface at an end opposite to the tapered cavity, the coupling body having a channel extending from the sealing surface to pass a fluid;
- a compression screw having an axial bore, a threaded portion in engagement with the threaded bore of the coupling body, and a drive surface;
- a tube extending through the axial bore of the compression screw, the tube including a body and a fluidic channel extending through the body to a sealing end, wherein the body includes a pocket formed at the sealing end having a depth;
- a collet secured to an outer surface of the tube and having a first end;
- and
- a polymer seal having a channel to pass a fluid, the polymer seal including a flange portion and an insertion portion;
- locating the insertion portion of the polymer seal into the pocket of the body of the tube;
- compressing, by the compression screw being rotated about the coupling body, the polymer seal between the tube and the sealing surface of the coupling body;
- and
- forming a fluidic seal between the endface of the tube and the flange portion after the compressing.
Dependencies are inferred from the claim text.