Fluid handling – With repair – tapping – assembly – or disassembly means – Tool for applying or removing valve or valve member
Reexamination Certificate
2002-03-14
2003-06-03
Walton, George L. (Department: 3753)
Fluid handling
With repair, tapping, assembly, or disassembly means
Tool for applying or removing valve or valve member
C029S213100, C029S214000, C029S235000, C029S278000, C137S015180, C251S214000, C277S313000, C277S511000, C277S598000
Reexamination Certificate
active
06571819
ABSTRACT:
SPECIFICATION
My invention relates to automotive internal combustion engines.
The principal object thereof is to provide a method of installing valve seals on valve stems of such engines and to provide a two-piece tool for carrying out said method.
BACKGROUND OF INVENTION
In the United States alone there are approximately 25,000 engine rebuilding shops, all of whom are capable of installing a valve seal made by Dana Corporation called “Perfect Circle” (a trademark). Upon a customer's request, a rebuild shop will install this “Perfect Circle” brand of valve seals which are desirable because of their superior quality and durability, if properly seated.
Currently, Dana Corporation supplies these installers with a plastic sleeve that fits over the end of a valve stem, but are otherwise they are left to their own skill and ingenuity in installing such valve seals. The procedures used are not consistent and sometimes seals end up damaged or not properly seated. With the two-piece tool that I provide by my invention, it is impossible to damage the seal during the installation process and perfect seating is accomplished in each instance.
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Hall Priddy Myers & Vande Sande
Walton George L.
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