Coating processes – Nonuniform coating – Mask or stencil utilized
Reexamination Certificate
2007-07-10
2007-07-10
Parker, Fred J. (Department: 1762)
Coating processes
Nonuniform coating
Mask or stencil utilized
C427S287000
Reexamination Certificate
active
10942222
ABSTRACT:
Mask (10, 10′, 21, 22) for use in coating a carbon-carbon composite brake disc (25) with anti-oxidant. The mask is composed of carbon-carbon composite material or nonreactive ceramic material. The mask is configured with edge ridges (11, 13) that are aligned with the outer and inner annular diameters of the carbon-carbon composite brake disc, a gasflow channel (12) between the ridges, and a gas access port (18) that allows gas to enter the gasflow channel. The mask may also include a gas exit port (16) having a valve (17) operatively connected thereto, so that gas flow may be restricted when pressure within the mask and carbon-carbon composite brake disc falls below a specified minimum value. Also, a method of avoiding application of liquid antioxidant material to a friction surface of a carbon-carbon composite brake disc, by: covering the friction surface with a mask configured to deliver compressed gas to the friction surface, and directing compressed gas across the friction surface and through pores in the carbon-carbon composite brake disc and/or in the mask while the masked brake disc is in the presence of the antioxidant material in a liquid state.
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Cole David R.
Johnson Phillip D.
Simpson Allen H.
Smith Richard W.
Wright Marcia A.
Honeywell International , Inc.
Parker Fred J.
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