Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Reexamination Certificate
2007-04-10
2007-04-10
Bryant, David P. (Department: 3726)
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
C029S458000, C277S592000, C219S121640
Reexamination Certificate
active
10756591
ABSTRACT:
The subject invention provides a method of manufacturing a multi-layered steel gasket assembly including a plurality of steel gasket layers each having a predetermined electrical resistance and including at least one coating layer of a material having an electrical resistance substantially greater than that of the steel gasket layers. The method includes the steps of: applying the coating layer of the selected material to at least one surface of at least one of the steel gasket layers to provide at least one coated gasket layer; assembling the coated gasket layer with at least one other steel gasket layer such that the coating layer prevents the use of traditional resistance welding in joining the gasket layers; and thereafter welding the assembled gasket layers together by either a JAG or CO2 laser to form the multi-layered steel gasket assembly.
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Afzali Sarang
Bryant David P.
Dickinson Wright PLLC
Federal-Mogul Worldwide, Inc.
Stearns Robert L.
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