Composite laminate of metal sheets and continuous filaments-reinforced synthetic layers

Patent 4935291 Issued on June 19, 1990. Estimated Expiration Date:

December 29, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Laminate of aluminum sheet material and aramid fibers Patent #: 4500589
Issued on: 02/19/1985
Inventor: Schijve , et al.

Inventor

Gunnink, Jan W.

Assignee

Akzo N.V.

Application

No. 291591 filed on 12/29/1988

US Classes:

428/213, Thickness (relative or absolute)428/109, With additional layer(s)428/110, On each side of strands or strand-portions428/114, Including grain, strips, or filamentary elements in different layers or components parallel428/457Of metal

Examiners

Primary: Bell, James J.

Attorney, Agent or Firm

Stevens, Davis, Miller & Mosher

International Class

B32B 007/02

Foreign Application Priority Data

1987-12-31 NL

Abstract

Fatigue- and flutter- resistant laminate, suitable for use as constructional material in aviation, particularly in the construction of wings. It comprises (I) a laminated cover having a constant thickness and consisting of at least two metal plates firmly interbonded by an intermediate resinous layer reinforced with continuous strands, a substantial proportion of which extends mutually parallel in at least one direction, and (II) a substrate which is firmaly bonded thereto, and comprises at least one metallic support plate having a tapering thickness. (I) and (II) may be interbonded by means of an optionally fiber-reinforced resin. (I) may be present on both sides of (II). Preferably, the minimum thickness of (II) is at least equal to the thickness of the metal plates present in (I). More particularly, the thickness of (II), tapers from 11 to 1 mm (over a length of at most 20 m).