Patent ID: 6158706
Filing Date: 2000-12-12
Classification: E04G

Abstract:
A method of preventing separation of a vertically adjustable support column having sections connected together by mating threads, comprising the steps of:providing a first section having a first end, a second end and an interior surface defining an interior bore, the interior surface having internal threads at the second end and an enlarged diameter portion spaced from the second end immediately adjacent to the internal threads;providing a second section having a first end, a second end and an exterior surface having external threads at the first end capable of mating with the internal threads of the first section;mating the external threads of the second section with the internal threads of the first section until the first end of the second section protrudes into the enlarged diameter portion of the interior bore of the first section; andmechanically damaging with a tool a top few of the external threads at the first end of the second section so that the mechanically damaged threads prevent the first end of the second section from being removed from the enlarged diameter portion of the first section but permit relative telescopic adjustment of the first section and the second telescopic section within a limit provided by the enlarged diameter section.