Method and apparatus for injecting a sample into a chromatography system
AssigneeAnalogix, Inc.
InventorNicholas DeMarco
Life of this patent
Estimating the term…
Abstract
A method and apparatus for injecting a sample into a chromatography system. The apparatus can include a tubular housing having an inner surface and an open end, and a cap coupled to the open end of the tubular housing. The cap can include an aperture therethrough. The apparatus can further include a rod positioned through the aperture in the cap and including a piston at one end. The piston can include an outer edge in contact with the inner surface of the tubular housing. The apparatus can further include a lever coupled to the cap, wherein the lever engages the rod and substantially prevents movement of the rod in a first direction while allowing movement in a second direction substantially opposite the first direction.
Claims24
An apparatus for injecting a sample into a chromatography system, the apparatus comprising:
- a tubular housing having an inner surface and an open end;
- a cap coupled to the open end of the tubular housing, the cap having an aperture therethrough;
- a rod positioned through the aperture in the cap and including a piston at one end, the piston having an outer edge in contact with the inner surface of the tubular housing;
- and
- a lever coupled to the cap, wherein the lever engages the rod and substantially prevents movement of the rod in a first direction while allowing movement in a second direction substantially opposite the first direction.
An apparatus for injecting a sample into a chromatography system, the apparatus comprising:
- a tubular housing having a longitudinal axis, an open end, an inner surface and an outwardly-protruding flange adjacent the open end;
- a cap dimensioned to cover the open end of the tubular housing, the cap including
- a plug portion dimensioned to be received within the open end of the tubular housing, and
- a gripping portion coupled to at least a portion of the flange of the tubular housing;
- a rod having a longitudinal axis generally parallel with the longitudinal axis of the tubular housing, the rod having a first end and a second end;
- a piston coupled to the first end of the rod, the piston protruding outwardly from the rod to define an outer surface, the outer surface dimensioned to engage the inner surface of the tubular housing when positioned within the tubular housing;
- a lever pivotally coupled to the cap and movable between a first position in which the lever engages the rod to substantially prevent movement of the rod in a first direction while allowing movement in a second direction substantially opposite the first direction and a second position in which the lever allows movement of the rod in the first direction and the second direction;
- and
- a biasing element positioned to bias the lever in the first position.
An apparatus for injecting a sample into a chromatography system, the apparatus comprising:
- a tubular housing having a longitudinal axis, an open end, an inner surface and an outwardly-protruding flange adjacent the open end;
- a cap dimensioned to cover the open end of the tubular housing, the cap having an aperture therethrough, the cap including
- a plug portion dimensioned to be received within the open end of the tubular housing, and
- a gripping portion coupled to at least a portion of the flange of the tubular housing;
- a rod having a longitudinal axis generally parallel with the longitudinal axis of the tubular housing, the rod positioned through the aperture in the plug portion of the cap and having a first end and a second end;
- a piston coupled to the first end of the rod, the piston protruding outwardly from the rod to define an outer surface, the outer surface dimensioned to engage the inner surface of the tubular housing when positioned within the tubular housing;
- a lever having an aperture through which the rod is positioned, the lever pivotally coupled to the cap and movable between a first position in which the lever engages the rod to substantially prevent movement of the rod in a first direction while allowing movement in a second direction substantially opposite the first direction and a second position in which the lever allows movement of the rod in the first direction and the second direction, wherein the lever is positioned at an acute angle with respect to the longitudinal axis of the rod when in the first position, and wherein the lever is positioned at a substantially right angle with respect to the longitudinal axis of the rod when in the second position;
- and
- a biasing element positioned to bias the lever in the first position.
Dependencies are inferred from the claim text.