Sampling with fitting between needle and housing
AssigneeAgilent Technologies, Inc.
InventorsThomas Ortmann, Michael Lang
Life of this patent
Estimating the term…
Abstract
A sampling unit includes a needle for aspirating a sample fluid, a housing, and a fitting. The needle includes a needle tip and a needle channel through the needle for guiding the aspirated sample fluid. The needle channel opens at the needle tip. The housing includes a housing cavity and a housing channel opening into the housing cavity. The fitting includes a fitting cavity and a fitting channel. The fitting is configured for sealingly receiving the needle tip into the fitting cavity and for being inserted into the housing cavity, so that the fitting channel on one side fluidically couples to the needle channel and on another side couples to the housing channel.
Claims18
A sampling unit, comprising:
- a needle configured for aspirating a sample fluid, wherein the needle comprises a needle tip and a needle channel through the needle for guiding the aspirated sample fluid, and wherein the needle channel opens at the needle tip;
- a housing comprising a housing cavity and a housing channel opening into the housing cavity;
- and
- a fitting having a fitting cavity and a fitting channel, wherein:
- the fitting comprises an external tapered shape extending on a lateral side of the fitting and decreasing in diameter towards an end of the fitting channel;
- the housing cavity comprises an internal tapered shape decreasing in diameter towards the housing channel;
- the fitting is configured to sealingly receive the needle tip into the fitting cavity and to be inserted into the housing cavity, so that the fitting channel on one side fluidically couples to the needle channel and on another side couples to the housing channel;
- and
- the needle, the housing, and the fitting are configured such that, when the needle tip is received into the fitting cavity and the fitting is inserted into the housing cavity, the needle provides an axial force that presses the external tapered shape of the fitting against the internal tapered shape of the housing cavity to provide a sealing between the fitting and the housing.
A sampling unit, comprising:
- a needle configured for aspirating a sample fluid, wherein the needle comprises a needle tip and a needle channel through the needle for guiding the aspirated sample fluid, and wherein the needle channel opens at the needle tip;
- a housing comprising a housing cavity and a housing channel opening into the housing cavity;
- and
- a fitting having a fitting cavity and a fitting channel, wherein:
- the needle comprises a tapered shape comprising an external cone extending on a lateral side of the needle tip and decreasing in diameter towards an end of the needle tip;
- the fitting cavity comprises a tapered shape comprising an internal cone decreasing in diameter towards the one end of the fitting channel;
- the fitting comprises a tapered shape comprising an external cone extending on a lateral side of the fitting and decreasing in diameter towards the other end of the fitting channel;
- the housing cavity comprises a tapered shape comprising an internal cone decreasing in diameter towards the housing channel;
- the fitting is configured to sealingly receive the needle tip into the fitting cavity and to be inserted into the housing cavity, so that the fitting channel on one side fluidically couples to the needle channel and on another side couples to the housing channel;
- and
- the fitting is configured to provide a sealing fluidic coupling between the needle channel and the housing channel when the needle is pressed against the housing, by coupling the external cone of the needle to the internal cone of the fitting cavity, and by coupling the external cone of the fitting to the internal cone of the housing cavity.
Dependencies are inferred from the claim text.