Michael Scott Hamilton

US Patent:

6370972, Apr 16, 2002

Filed:

Aug 30, 1999

Appl. No.:

09/386499

Inventors:

Andrew J. Bomber - Vancouver WA
Michael A. Hamilton - Vancouver WA

Assignee:

SEH America, Inc. - Vancouver WA

International Classification:

G01N 100

US Classification:

7386323

Abstract:

A chemical sampling sink and method. The chemical sampling sink typically includes an enclosure configured to contain a receptacle, and a chemical supply line extending into the enclosure, the chemical supply line including a dispenser configured to deliver a liquid chemical to the receptacle. The chemical sampling sink also includes an exhaust line attached to the enclosure, the exhaust line being configured to suction gases from the enclosure, and a filter positioned on the enclosure, the filter being configured to remove contaminants from air drawn into the enclosure as gases are suctioned from the enclosure out the exhaust line.

US Patent:

61995770, Mar 13, 2001

Filed:

Mar 12, 1999

Appl. No.:

9/267539

Inventors:

Andrew J. Bomber - Vancouver WA
Michael A. Hamilton - Vancouver WA

Assignee:

SEH America, Inc. - Vancouver WA

International Classification:

F16K 1310
F16K 3700

US Classification:

1372511

Abstract:

A system for regulating pressure in a sealed chemical storage tank. The system includes a vent passage connected to the tank, through which gas may pass into and out of the tank. The vent passage includes a first enclosed region having a first volume and a second enclosed region having a second volume. A volume of liquid, which is less than each of the first and second volumes, is associated with the vent passage to selectively constrain the passage of gas through the vent passage. Increased pressure in the tank moves the liquid into the second enclosed region. The second enclosed region is constructed to accommodate the volume of liquid to allow gas to pass. Vacuum in the tank moves the liquid into the first enclosed region. The first enclosed region is constructed to accommodate the volume of liquid to allow gas to pass.