Larry L Thornton

US Patent:

7434745, Oct 14, 2008

Filed:

May 26, 2005

Appl. No.:

11/138122

Inventors:

Joseph L. Deiss - Portland OR, US
Larry L. Thornton - Corvallis OR, US

Assignee:

CH2M Hill Industrial Design & Construction, Inc. - Portland OR

International Classification:

F25B 41/04
A47K 3/022
F25D 15/00

US Classification:

236 92B, 4598, 16510419, 16510428, 222 54, 137340

Abstract:

A method and system for supplying temperature-controlled water to emergency shower and/or eyewash units (“SS/EWs”). In one embodiment, the water is circulated through a normally closed system containing a heat source such as a heat exchanger, a tank and pipes leading to the SS/EWs. Sensors in the system detect the temperature of the water and controllers regulate the amount of heat supplied to the heat exchanger to keep the temperature of the water in the system within a desired range of temperatures. A timer-controlled drainage subsystem periodically drains some or all of the water in the system. Water drained or supplied to the SS/EWs is made up by a cold water supply that feeds the heat exchanger. The system may use an alarm to signal water out of the desired temperature range, improper drainage, or water leaking from the system or being used by an SS/EW.