Valve stem repair kit and method

摘要

A method for repairing damaged valve stem assemblies includes enlarging a bore within a body of a valve stem to form an enlarged bore portion and creating a conical hole in an end of the valve stem body around the enlarged bore portion. Internal threads are created within the enlarged bore portion, and a valve stem repair extension is installed in the enlarged bore portion. The valve stem repair extension has a beveled surface that facilitates formation of a hermetic seal between the valve stem body and the valve stem repair extension. The steps of enlarging the bore and creating the conical hole may both be performed using a countersinking drill bit having a beveled cutting portion.

主权项

1. A valve stem repair extension comprising:
a. a generally cylindrical hollow body, said body having an outer surface; b. a threaded attachment portion disposed on said outer surface on one end of said body for mating with a threaded bore in a damaged valve stem assembly; c. an outer threaded portion on an end of said body opposite said threaded attachment portion for mating with a valve cap; d. a valve core threaded into an inner threaded portion of said body; e. a cylindrical shank disposed on said outer surface extending from the threaded attachment portion to a knurled portion of the body; and f. a beveled surface of the repair extension extending directly away from said cylindrical shank to said knurled portion to create an annular recess, said annular recess positioned adjacent to said cylindrical shank for creating a hermetic seal between the valve stem repair extension and the valve stem assembly.