Striated hybrid blade

Details Striated hybrid blade Striated hybrid blade

1997-12-22

1999-06-22

Lopez, F. Daniel

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Laminated, embedded member or encased material

416229R, 416241A, 416224, 416144, 416145, 416500, 415119, B63H 126

Patent

active

059136618

ABSTRACT:
A fan blade includes a metal airfoil having first and second opposite sides extending longitudinally between a root and a tip, and laterally between a leading edge and a trailing edge. The airfoil further includes a plurality of fine striations spaced laterally apart between the leading and trailing edges in the airfoil first side, and extending longitudinally between the root and the tip. A viscoelastic filler is bonded in the striations for damping torsional vibrations of the airfoil.

REFERENCES:
patent: 2412615 (1946-12-01), Howard
patent: 2933286 (1960-04-01), Klint et al.
patent: 3294366 (1966-12-01), Coplin
patent: 3796513 (1974-03-01), Jonas
patent: 4118147 (1978-10-01), Ellis
patent: 4178667 (1979-12-01), Stevens et al.
patent: 5295789 (1994-03-01), Daguet
patent: 5634771 (1997-06-01), Howard et al.
patent: 5655883 (1997-08-01), Schilling
(Docket RD-24978) Patent application Serial No. 08/650,278, filed May 20, 1996.
(Docket RD-24735) Patent application Serial No. 08/593,757, filed Jan. 29, 1996.
(Docket RD-25135) Patent application Serial No. 08/837,880, filed Apr. 25, 1997.

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