Research/Patents/US 4515526
US 4515526ACTIVE SECRECY ORDER

COOLABLE AIRFOIL FOR A ROTARY MACHINE

Assignee

UNITED TECHNOLOGIES CORPORATION, A CORP. OF DE.

Filed

Dec 28, 1981

Granted

May 7, 1985

Location

WEST HARTFORD CT US

Abstract

A coolable airfoil 10 for rotary machines is disclosed. The airfoil has a passage 54 extending spanwisely through the leading edge region 26 of the blade. The passage has a plurality of trip strips 68 canted toward the direction flow. Each trip strip includes a vortex generator integrally formed with the trip strip which is spaced from the wall of the airfoil. In one embodiment, a plurality of trip strips each having an integral vortex generator are disposed in the passageway and at least one of the vortex generators is of greater height than the remaining vortex generators.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Jun 23, 1982

Rescinded

Never rescinded

Duration

44y 0mo — still active

This secrecy order has no recorded rescission date in USPTO records. The order may still be legally in force, or rescission data may not be publicly available.

Inventor

  • 1JAMES L. LEVENGOOD

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records