Chul Ho Sohn

44549393, Jun 19, 1984

Dec 15, 1981

6/330933

Richard S. Kampf - Costa Mesa CA
Chul H. Sohn - Irvine CA
Aurangzeb K. Khan - Costa Mesa CA

Beckman Instruments, Inc. - Fullerton CA

B65G 4300

198341

Apparatus for transporting elongated sample holders in a sample holder storage compartment past an operating station at which sample tubes contained in the sample holders may be removed and then returned to the sample holders. First and second parallel conveyors on opposite sides of the operating station drive the holders toward and away from the operating station. Lateral drive means engage the holders in longitudinal stop positions at opposite ends of the conveyors and drive them laterally between the conveyors to lateral stop positions, one of the holders during lateral movement being driven into and away from an operative position at the operating station. Encoded label means are displayed on each sample holder for indicating the incremental spacing between the sample tubes carried in the sample holder. Detector means are provided for reading the encoded label means and convey a signal in accordance with the label means to control means which control the operation of the first and second conveyor means and of the lateral drive means.

48657140, Sep 12, 1989

Jul 17, 1987

7/074743

Chul H. Sohn - Irvine CA
Cynthia R. Blessum - Pedley CA
Steven C. Gage - Brea CA

Beckman Instruments, Inc. - Fullerton CA

G01N 2728
G01N 2726

204299R

An electrophoretic gel cooled cell including a gel supporting surface. The cell includes members for holding gels against the supporting surface such that gels of either of two dimensions may be used with the cell. A reservoir adapted to hold a cooling medium shares a common wall with the supporting surface to cool the gel retained by the members. The reservoir has a large opening which may be closed by a cover for easy insertion and removal of the cooling medium from the reservoir. A venting valve in the reservoir cover vents gas in the reservoir to atmosphere and closes when the cover is in an inverted position to prevent condensate leakage through the vent.

48550884, Aug 8, 1989

Oct 20, 1988

7/262248

Chul H. Sohn - Irvine CA
David L. Goodale - Anaheim CA

Beckman Instruments, Inc. - Fullerton CA

B01F 304

261 53

A device for generating a plurality of gas bubbles in a liquid. The device includes a conduit adapted to carry the liquid. A first gas chamber is formed near the conduit and an orifice proximate a side wall of the conduit defines a passageway between the first gas chamber and the conduit. A valve member is adapted to seat against and close the orifice. The device may include a second gas chamber and a diaphragm responsive to gas pressure in the second gas chamber. A conduit connecting the first and second chambers may include a variable vent for controlling the size and number of gas bubbles injected into the liquid flowing in the conduit.