Dav Mar

US Patent:

46448071, Feb 24, 1987

Filed:

Feb 21, 1985

Appl. No.:

6/703861

Inventors:

Dav Mar - Sunnyvale CA

Assignee:

Dionex Corporation - Sunnyvale CA

International Classification:

G01N 114

US Classification:

7386462

Abstract:

Apparatus for delivering samples of liquid to be analyzed in a chromatographic column. The sample is placed in a vial having a compressible plunger slideably mounted therein. The sample is delivered by depressing the plunger with a sampling tip, and the sample is delivered to the tip through a passageway in the plunger. The tip interfits with the plunger to form a fluid-tight seal yet is readily disengaged therefrom. The plunger and the bottom wall of the vial have matching contours which eliminate air from the sample and assure that all of the sample is delivered. A filter mounted in the plunger passageway removes particulate matter from the sample delivered to the tip.

US Patent:

45125457, Apr 23, 1985

Filed:

Jun 24, 1982

Appl. No.:

6/391571

Inventors:

Dav Mar - Sunnyvale CA

Assignee:

Dionex Corporation - Sunnyvale CA

International Classification:

F16L 5514

US Classification:

251 4

Abstract:

An externally actuated valve assembly especially suitable for use in liquid chromatography is disclosed herein. This assembly is designed to control the flow rate of a fluid through an elastomeric conduit by acting on a relatively long section of the conduit in a way which varies the cross-sectional configuration of its passageway, preferably in a uniform manner along the entire length of the passageway, in order to vary the flow rate of fluid therethrough a corresponding amount.