David Thomas McMillan
Engineers at 31 St, Boulder, CO
License number
Colorado 62203
Issued Date
Jun 17, 2005
Renew Date
Jun 17, 2005
Type
Engineer Intern
Address
Address
340 31St St, Boulder, CO 80305
Professional information
Elliptical Flow Conditioning Pipe Elbow
US Patent:
2009002, Jan 29, 2009
Filed:
Jul 27, 2007
Appl. No.:
11/829685
Inventors:
David T. McMillan - Boulder CO, US
International Classification:
F16L 25/00, F16L 43/00
US Classification:
285179, 138 39
Abstract:
A pipe elbow for conditioning the flow of fluid through the elbow so that separate flow conditioners or a flow straightener need not be inserted between the elbow and a flow measurement device, comprising, a fluid carrying conduit elbow having first and second ends of circular cross section for connection to straight piping and having a bend intermediate the ends, wherein a lateral cross section of the conduit at the bend is elliptical in shape.
Differential Pressure Measuring Probe With Bottoming Indicator
US Patent:
7561056, Jul 14, 2009
Filed:
Mar 27, 2007
Appl. No.:
11/692009
Inventors:
David T. McMillan - Boulder CO, US
Assignee:
Dieterich Standard, Inc. - Boulder CO
International Classification:
G08B 21/00
US Classification:
340603, 73756
Abstract:
A bottoming indication system indicates contact between an inner wall of a fluid conducting conduit and a tip of a differential pressure measuring probe. The system includes a piezoelectric device and an indicator. The piezoelectric device is affixed to the tip of the differential pressure measuring probe so that pressure exerted on the piezoelectric device by contact between the piezoelectric device and the inner wall of the conduit produces a voltage difference across the piezoelectric device. The indicator is in electrical communication with the piezoelectric device so that a voltage difference across the piezoelectric device activates the indicator to indicate contact between the inner wall of the conduit and the tip of the differential pressure measuring probe.