Brian T Robinson

US Patent:

54029350, Apr 4, 1995

Filed:

Feb 2, 1994

Appl. No.:

8/190362

Inventors:

Aldo Arena - Smithtown NY
Christopher Horan - Huntington NY
Brian Robinson - Bayside NY

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G05D 2302

US Classification:

236 93R

Abstract:

A compensation device receives an inlet fluid flow and adjusts the pressure at an outlet so as to maintain a constant Reynolds number throughout the operating temperature range of the fluid. This is accomplished by a metering valve device in the nature of a fluted pin which becomes displaced in response to fluid temperature variations. This displacement varies the exposed cross-sectional area of a fluted end of the pin as it becomes seated to a greater or lesser extent in response to temperature variations. This results in corresponding changes in pressure between the inlet and outlet of the device while maintaining a constant Reynolds number. An additional embodiment includes an unfluted pin which becomes seated in a fluted bore located in a removable knurled knob. This allows one to insert various knurled knobs with fluted bores which have geometric configurations particularly adapted for particular fluids. Such a modular approach avoids the necessity of dismantling the device.