DR. MARGARET DOLAN, PHD
Psychologist at Boren Ave, Seattle, WA
License number
Washington PY60026316
Category
Psychologist
Type
Psychologist
Address
Address
901 Boren Ave STE 1300, Seattle, WA 98104
Phone
(425) 233-0840
(206) 397-0953 (Fax)
(206) 397-0953 (Fax)
Personal information
See more information about MARGARET DOLAN at radaris.comName
Address
Phone
4119 NE 96Th St, Seattle, WA 98115
620 18Th Ave E, Seattle, WA 98112
Professional information
Valve Stem Gas Leak Detector
US Patent:
5594162, Jan 14, 1997
Filed:
Jun 6, 1995
Appl. No.:
8/465819
Inventors:
James P. Dolan - Seattle WA
Patrick M. Dolan - Seattle WA
James T. Dolan - Seattle WA
Margaret R. Dolan - Seattle WA
Patrick M. Dolan - Seattle WA
James T. Dolan - Seattle WA
Margaret R. Dolan - Seattle WA
International Classification:
F16L 55168, G01W 111, F16K 4104
US Classification:
73 46
Abstract:
A valve stem gas leak sensor or detector configured to surround a possibly leaking petrochemical or like flow line valve stem and provide for external monitoring equipment an electrical resistance related to the amount of hydrocarbon gas leakage occurring around the valve stem. Such a gas leak detector, termable a ring sensor, is configured as a stem surrounding enclosure, with interconnecting segments for ease of installation around and removability from a valve stem, with one or both of each such segments having an interiorly arranged layer of gas sensor particulate material characterized by change in electrical resistance in the presence of a changing concentration of hydrocarbon gas leakage around a valve stem, and with interengaging connector/conductor pins holding the segments together around the valve stem and across which the electrical resistance of one or both gas sensor material layers can be measured with the ring sensor in place on the valve stem.