Metallic doubler for repair of a gas turbine engine part

Details Metallic doubler for repair of a gas turbine engine part Metallic doubler for repair of a gas turbine engine part

2011-07-19

2011-07-19

Zimmerman, John J (Department: 1784)

Stock material or miscellaneous articles

All metal or with adjacent metals

Honeycomb, or with grain orientation or elongated elements...

C428S116000, C029S402110, C029S897100

Reexamination Certificate

active

07981519

ABSTRACT:
A method and system of repairing an engine part having a cracked metal skin bonded to a honeycomb core includes removing a portion of the honeycomb that corresponds to a cracked portion of the metal skin. A crack in the metal skin originates from an edge of the engine part. A portion of the honeycomb is removed to form a slot in the honeycomb beginning at the edge of the part. A doubler is inserted into the slot in the honeycomb and is attached to an underside of the metal skin to form a lap joint between the doubler and the metal skin. In one embodiment, the portion of the metal skin that includes the crack remains. In an alternative embodiment, the cracked portion of the metal skin is removed and a metal patch is attached to the doubler such that the patch replaces the removed metal skin.

REFERENCES:
patent: 4013210 (1977-03-01), Deminet
patent: 4030849 (1977-06-01), Keifert et al.
patent: 4073427 (1978-02-01), Keifert et al.
patent: 4273818 (1981-06-01), Buchs
patent: 4460420 (1984-07-01), Estrada
patent: 4517038 (1985-05-01), Miller
patent: 4855182 (1989-08-01), Ondrejas et al.
patent: 5023987 (1991-06-01), Wuepper et al.
patent: 5251435 (1993-10-01), Pauley
patent: 5653836 (1997-08-01), Mnich et al.
patent: 5807628 (1998-09-01), Mnich et al.
patent: 6051302 (2000-04-01), Moore
patent: 6210773 (2001-04-01), Moore
patent: 6820334 (2004-11-01), Kebbede et al.
patent: 7069830 (2006-07-01), Meyer
patent: 2004/0028877 (2004-02-01), Itoh et al.
patent: 2006/0254661 (2006-11-01), Vintilescu et al.
patent: 2007/0240819 (2007-10-01), Bogue et al.
patent: 2007/0275211 (2007-11-01), Bogue
patent: 2007/0275212 (2007-11-01), Stadtlander et al.
patent: 2007/0289692 (2007-12-01), Bogue et al.
patent: 2008/0047121 (2008-02-01), Douglas
patent: 1870228 (2007-12-01), None
patent: 06-126869 (1994-05-01), None
patent: 08-169057 (1996-07-01), None
patent: 08-175498 (1996-07-01), None
patent: 09-001263 (1997-01-01), None
Raymond F. Wegman, Handbook of Adhesive Bonded Structural Repair, 1992, pp. 149-159.
Tom Bitzer, Honeycomb Technology—Materials, Design, Manufacturing, Applications and Testing, 1997, pp. 193-199, Fig. 9.4.
Hexcel Composites, Composite Repair, Apr. 1, 1999, pp. 1-13, Figs. 4-6.
Ed A A Baker, Donald H. Middleton, Repair Techniques for Composite Structures, Composite Materials in Aircraft Structures, Jan. 1, 1990, pp. 207-227, Figs. 13.2, 13.4.
EP Search Report and Written Opinion, Aug. 11, 2009, pp. 1-9.

Affiliated with

Also associated with

Rating

Metallic doubler for repair of a gas turbine engine part does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Metallic doubler for repair of a gas turbine engine part, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metallic doubler for repair of a gas turbine engine part will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2631970