Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Inorganic compound
Reexamination Certificate
2002-10-07
2004-09-07
McAvoy, Ellen M. (Department: 1764)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Inorganic compound
C508S168000, C508S169000, C508S539000
Reexamination Certificate
active
06787508
ABSTRACT:
FIELD OF THE INVENTION
This invention relates generally to lubricants and, more specifically, to lubricants for cutting threads.
BACKGROUND OF THE INVENTION
Heat-treated and hardened metal cutting tools, commonly either taps or dies, are used to cut threads. Lubricants are commonly used in this cutting process, In many instances, the cutting fluid is a liquid tapping fluid, often containing molybdenum.
The tapping fluids used for thread cutting are often thin fluids that run off the cutting tool and the work, reducing the amount of lubricant available at the actual working surface. A reduced amount of tapping fluid or lubricant in the areas of cutting results in increased friction and wear, decreasing the working life of the cutting tools.
Therefore, there is an unmet need for a cutting tool lubricant that stays in contact with working surfaces, and provides better lubrication to cutting tools.
SUMMARY OF THE INVENTION
The present invention provides a substance for lubricating cutting tools, the substance comprising a thickening agent such as grease and tapping fluid. The grease may include lithium and the tapping fluid includes molybdenum. The substance is preferably made from two to six parts of grease per one part tapping fluid.
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Beaufait Mark S.
Black Lowe & Graham PLLC
McAvoy Ellen M.
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