Robert Mack
Engineering at Contour Dr, Lake Charles, LA

6631882, Oct 14, 2003

Aug 9, 2001

09/925652

Robert Mack - Lake Charles LA 70605

F16K 506

25112904, 25131508

Method and apparatus for testing an emergency shutdown valve without disrupting the flow of the process during a testing procedure. The apparatus includes an emergency shutdown valve capable of moving about 25% beyond a fully opened position to a fully closed position. The emergency shutdown valve has a coefficient of flow which is equal to or greater than the normal coefficient of flow for the process when the valve is moved about 25% beyond its fully opened position which provides a means for moving the shutdown valve 50% of its total movement without affecting the coefficient of flow for the process. The apparatus also includes a programmable logic controller including a timer and counter, a valve actuator, valve positioner, and an alarm device for controlling the positioning and movement of the shutdown valve during a timed and scheduled shutdown valve testing process without affecting the flow of the process.

6988406, Jan 24, 2006

Oct 25, 2004

10/972266

Robert Mack - Lake Charles LA, US

G01F 23/36, G01F 23/52, G01F 23/60

73313, 73305, 73313, 73319, 73323

A system of liquid level detection has a vessel, a sight glass in fluid communication with the vessel, a float positioned in the sight glass, a proximity switch affixed exterior of the sight glass for transmitting a signal relative to a sensing of the float in proximity to the proximity switch, a timer cooperative with the proximity switch for measuring a period of time relative to the signal from the proximity switch, and an indicator cooperative with the timer for producing a humanly perceivable indication when the period of time is at a predetermined limit. The proximity switch can be positioned so as to detect a low level of liquid in the vessel or a high level of liquid in the vessel.