DONALD PRESTON
Engineering in Agawam, MA
License number
Massachusetts 26075
Expiration Date
Jun 30, 1992
Type
Mechanical Engineer
Address
Address
Agawam, MA 01001
Professional information
Fluid Flow Regulator
US Patent:
4715395, Dec 29, 1987
Filed:
Jun 30, 1986
Appl. No.:
6/880601
Inventors:
Roy J. Mainelli - West Hartford CT
Donald Preston - Agawam MA
Donald Preston - Agawam MA
Assignee:
United Technologies Corporation - Hartford CT
International Classification:
F15D 102
US Classification:
138 42
Abstract:
A plurality of angularly offset orifices (29) are disposed within a fuel line (13) to meter a flow of fuel therethrough. A first set (23) of orifices each have a length (L) (27) and a diameter (D) (31) having a first L/D ratio. A second set (35) of orifices each have a second L/D ratio.
Pressure Sensor
US Patent:
4357859, Nov 9, 1982
Filed:
Apr 8, 1981
Appl. No.:
6/252505
Inventors:
Donald Preston - Agawam MA
Robert G. Yeaton - East Granby CT
Robert G. Yeaton - East Granby CT
Assignee:
United Technologies Corporation - Hartford CT
International Classification:
F01B 1904, F16J 304
US Classification:
92 41
Abstract:
Fatigue fractures in the bellows capsule of a bellows-type pressure sensor are prevented by wrapping the capsule with a vibration damping material such as an open cell polyurethane foam saturated with a fluid. In the preferred embodiment, wherein the sensor is employed in a gas turbine engine fuel control, the fluid may conveniently comprise liquid jet engine fuel.