Metal working – Method of mechanical manufacture – Repairing
Reexamination Certificate
1999-04-14
2001-12-11
Rosenbaum, I Cuda (Department: 3726)
Metal working
Method of mechanical manufacture
Repairing
C029S402010, C029S402090, C219S098000, C219S099000, C228S119000
Reexamination Certificate
active
06327766
ABSTRACT:
TECHNICAL FIELD
The invention relates to repairing a cover for a transmission torque connector having loosened, worn or bent bolts that cause a weakened structure and, in some cases, damage to critical drive components of the vehicle they are components of.
Transmission torque connectors of the type used in automatic transmissions for automobiles, trucks and buses will typically have a number of bolts extending through holes. These bolts, typically six, through connection to the crankshaft, carry the full power of the engine. Typically, bolts of this type are welded in place to provide a fluid-tight seal but can come loose due to a number of causes such as torsion and vibration from rough-running diesel engines or loose flywheels. When the bolts loosen, lubricating fluid within the cover can leak and cause damage to surfaces under it and failure of internal parts due to loss of lubrication. Simply welding the bolts from the back or welding with solder have not been effective answers to the problem. Similarly, stripped or bent bolts cannot be effectively repaired.
There is a current need for a method for easily, effectively repairing a cover for a transmission torque connector having loosened bolts. Further, there is a need to provide a torque connector cover wherein the bolts are securely fastened and do not leak.
DISCLOSURE OF INVENTION
It is an object of the invention to permit reuse of a cover for a transmission torque connector having loosened bolts.
It is another object of the invention to permit reuse of a cover for a transmission torque connector having stripped or bent bolts.
It is an object of the invention to provide a method for effectively repairing a cover for a transmission torque connector having loosened, stripped or bent bolts.
These and other objects are achieved by the present invention which provides an improved method for effectively repairing of a cover for a transmission torque connector having loosened or otherwise damaged bolts, which permits reuse of the cover, and a cover of this type so repaired.
In one aspect, the method comprises: providing a cover having an interior surface, an outer surface and a plurality of holes through which bolts extend; removing a bolt from a hole; fitting a metal plug into the hole in the cover from the inner surface; forming a recess by cutting away a top portion of the plug and an adjoining portion of the outer surface of the cover; filling the recess by forming a welding bead; machining the welding bead to form a welding surface suitable for welding a stud to it; and welding a stud to the welding surface.
In another aspect, the method comprises: providing a cover having an interior surface, an outer surface and a plurality of holes through which bolts extend;, cutting off the top part of a damaged bolt to form a bolt plug; forming a recess by cutting away a top portion of the bolt plug and an adjoining portion of the outer surface of the cover; filling the recess by forming a welding bead; machining the welding bead to form a welding surface suitable for welding a stud to it; and welding a stud to the welding surface.
In another of its aspects, the invention provides a repaired transmission torque connector for use in an automatic transmission for an automobile or bus, comprising: a cover body with an exterior surface and an interior surface; a machined peripheral area on the exterior surface; a plurality of holes with bolts extending through the cover body in the machined area; and, a stud welded to the exterior surface of the cover body in the machined area.
REFERENCES:
patent: 2631360 (1953-03-01), Sanford et al.
patent: 4562329 (1985-12-01), Minton
patent: 363108977 (1988-05-01), None
Cuda Rosenbaum I
Hong John C.
Portland Transmission Company, Inc.
St. Onge Steward Johnston & Reens LLC
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