Self-sealing fasteners
First Claim
Patent Images
1. A fastener covered with a self-sealing coating, said self-sealing coating comprising:
- one or more layers of a one-part moisture-curable sealant, wherein said one-part moisture-curable sealant is cure-blocked with a moisture removable blocking group; and
a first layer of a frangible moisture barrier coating on top of said one or more layers of the one-part curable sealant, said coating preventing curing of the sealant by preventing atmospheric moisture from reaching the sealant, and said coating being frangible enough to break apart when the fastener is installed to allow atmospheric moisture to reach the sealant and remove the moisture removable blocking group so that the sealant will cure.
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Accused Products
Abstract
A fastener suitable for use in airplane manufacture or repair that is coated with a pre-mixed moisture cure sealant. The sealant layer is coated with a frangible moisture barrier that will break apart when the fastener is installed, thus exposing the sealant to atmospheric moisture. Once exposed to moisture, the sealant will begin to cure. Preferred embodiments also provide a moisture indicator that provides a visual indication that the outer moisture resistant layer has been damaged.
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Citations
20 Claims
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1. A fastener covered with a self-sealing coating, said self-sealing coating comprising:
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one or more layers of a one-part moisture-curable sealant, wherein said one-part moisture-curable sealant is cure-blocked with a moisture removable blocking group; and a first layer of a frangible moisture barrier coating on top of said one or more layers of the one-part curable sealant, said coating preventing curing of the sealant by preventing atmospheric moisture from reaching the sealant, and said coating being frangible enough to break apart when the fastener is installed to allow atmospheric moisture to reach the sealant and remove the moisture removable blocking group so that the sealant will cure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A fastener covered with a self-sealing coating, said self-sealing coating comprising:
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one or more layers of a one-part moisture-curable sealant; a first layer of a frangible moisture barrier coating on top of said one or more layers of the one-part curable sealant, such that when the fastener is installed the frangible moisture barrier will break apart allowing atmospheric moisture to reach the sealant so that the sealant will cure; a coating of a moisture indicator over the first moisture barrier layer, said moisture indicator changing color when exposed to moisture; and
a second layer of a frangible moisture barrier coating deposited over the moisture indicator. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification