Turbine engine seal and method for repair thereof
Patent 4449714 Issued on May 22, 1984. Estimated Expiration Date: 
March 22, 2003. 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.
March 22, 2003. 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.Patent References 2285583 3046648 3918925 Rotor seal element with heat resistant alloy coating Rotary labyrinth seal member Method of restoring the shrouds of turbine blades Fully plasma-sprayed compliant backed ceramic turbine seal Patent #: 4336276 InventorAssigneeApplicationNo. 06/477717 filed on 03/22/1983US Classes:277/414, Formed by cellular pockets (e.g., honeycomb, etc.)277/922, BONDING OR JOINING FOR MANUFACTURE OF SEAL29/402.02, Seal or element thereof29/402.07, And by a metallurgical operation, e.g., welding, diffusion bonding, casting415/170.1, BEARING, SEAL, OR LINER BETWEEN RUNNER PORTION AND STATIC PART415/230, Seal427/451, Additionally containing nickel, cobalt, or iron as free metal or alloy427/456Aluminum, nickel, cobalt, or iron metal or alloy containing coatingExaminersPrimary: Warden, Robert J.Attorney, Agent or FirmInternational ClassB23P 6/00 (20060101)AbstractA method for repairing turbine engine seals and a product manufactured in accordance with the method are provided. A worn or damaged honeycomb seal is removed from a backing plate together with a portion of the surface of the plate. The plate is restored to substantially its original thickness by a low pressure plasma spraying operation which may be followed by further machining to arrive at the required plate thickness. A new seal is then brazed thereon. The finished product will include the backing plate, a low pressure plasma sprayed coated surface, and a honeycomb seal brazed to the coated surface.Other References
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