William L Halseth

US Patent:

D2678152, Feb 1, 1983

Filed:

May 26, 1981

Appl. No.:

6/266981

Inventors:

Donald P. Elliott - Denver CO
William L. Halseth - Parker CO
William R. King - Lakewood CO

Assignee:

C. R. Bard Inc. - Murray Hill NJ

International Classification:

D2402

US Classification:

D24 59

US Patent:

47158565, Dec 29, 1987

Filed:

Aug 13, 1985

Appl. No.:

6/765315

Inventors:

Donald P. Elliott - Denver CO
William L. Halseth - Parker CO

Assignee:

C. R. Bard, Inc. - Murray Hill NJ

International Classification:

A61M 100

US Classification:

604321

Abstract:

This invention relates to an improved chest fluid drainage bottle of the type having a fluid collection chamber connectable to receive fluid sucked from the patient's chest, the improvement consisting of an improved air leak detection system characterized by a fluid filled U-tube downstream of the air space overlying the fluid collecting chamber cooperating therewith to define an air leak detector substantially insensitive to small intermittent variations in upstream pressure while, at the same time, providing an observer with a reliable visual indication of a continuous upstream leak. The improvement also encompasses an anti-splash baffle adjacent the outlet of the U-tube effective to prevent the fluid therein from leaving same and, perhaps, entering the vacuum system upon the application of larger than normal intermittent upstream positive pressure surges.

US Patent:

45443700, Oct 1, 1985

Filed:

May 24, 1982

Appl. No.:

6/381161

Inventors:

Donald P. Elliott - Denver CO
William L. Halseth - Parker CO

Assignee:

C. R. Bard, Inc. - Murray Hill NJ

International Classification:

A61M 100

US Classification:

604319

Abstract:

This invention relates to an improved chest fluid drainage bottle of the type having a fluid collection chamber connectable to receive fluid sucked from the patient's chest, the improvement consisting of an improved air leak detection system characterized by a fluid filled U-tube downstream of the air space overlying the fluid collecting chamber cooperating therewith to define an air leak detector substantially insensitive to small intermittent variations in upstream pressure while, at the same time, providing an observer with a reliable visual indication of a continuous upstream leak. The improvement also encompasses an anti-splash baffle adjacent the outlet of the U-tube effective to prevent the fluid therein from leaving same and, perhaps, entering the vacuum system upon the application of larger than normal intermittent upstream positive pressure surges.

US Patent:

40419312, Aug 16, 1977

Filed:

May 17, 1976

Appl. No.:

5/687034

Inventors:

Donald P. Elliott - Denver CO
William L. Halseth - Parker CO

International Classification:

A61B 1900

US Classification:

128 1R

Abstract:

This invention relates to split ring markers fabricated in whole or in part from a radiopaque material, usually metal, having the terminal ends thereof and a medial portion formed to define eyelets by means of which said marker can be sutured to the tissue at the site of an anastomosis to provide a visual indication of its location when examined fluoroscopically.