Lantern ring removal tool

Details Lantern ring removal tool Lantern ring removal tool

1992-08-28

1993-10-19

Watson, Robert C.

Metal working

Means to assemble or disassemble

Valve applying or removing

29269, B23P 1900

Patent

active

052534057

ABSTRACT:
An apparatus for removing a stuck lantern ring from the packing chamber of a valve assembly. The apparatus includes a guide collar which can be fixedly secured to the valve stem at a position above the packing chamber. The guide collar includes a plurality of equally spaced guide holes for guiding a drilling instrument used to form threaded openings in the lantern ring. After the holes are formed in the stuck lantern ring, thread connectors are inserted through the guide holes in the guide collar and are engaged with the threaded holes in the lantern ring. When the valve stem is raised, the removal tool applies a lifting force to the stuck lantern ring to lift the lantern ring out of the packing chamber.

REFERENCES:
patent: 1865420 (1932-06-01), Kick
patent: 3711920 (1973-01-01), Simmons
patent: 3990139 (1976-11-01), Touchet
patent: 4034458 (1977-07-01), Ford et al.
patent: 4287653 (1981-09-01), Bloch
patent: 4929111 (1990-05-01), Lavitano

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