Back to results
US 4,070,169 AGranted
Chromatographic column oven
AssigneeVarian Associates, Inc.
InventorsKumiy Roy Iwao, Fritz Hunt Henshaw
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeVarian Associates, Inc.
InventorsKumiy Roy Iwao, Fritz Hunt Henshaw
Estimating the term…
In a chromatographic column oven, a particular arrangement of a fan, heater and baffles provides low thermal gradients and rapid oven cool-down. Low thermal gradients are obtained by providing an air circulation pattern that promotes optimum mixing of the air within the oven enclosure. A fast cool-down time is obtained by providing a high-velocity air flow along the walls of the oven enclosure. A fan is mounted substantially at the geometric center of a first wall of the oven enclosure. A second wall of the enclosure, which faces the first wall, comprises a door for providing access to the oven enclosure. An elongate heating element is mounted on the first wall so as to substantially surround the periphery of the fan. A plurality of baffles are mounted symmetrically around the periphery of the fan on and extending perpendicularly from the first wall. A gap is provided between each particular baffle and the wall or walls intersecting the first wall nearest that particular baffle.
A chromatographic column oven comprising walls to enclose an interior oven volume, a fan mounted at substantially the geometric center of a first one of said walls, a second one of said walls facing toward said first wall, said second wall comprising a door for providing access to said interior oven volume, an elongate heating element mounted on said first wall, said heating element substantially surrounding the periphery of said fan, a plurality of baffles mounted on said first wall, said baffles extending generally perpendicularly from said first wall and being symmetrically disposed around the periphery of said fan.
Dependencies are inferred from the claim text.