Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Quick connect-disconnect coupling for blast furnace tap hole drill bit

Quick connect-disconnect coupling for blast furnace tap hole drill bit

US Patent 5020780 · Granted Jun 4, 1991

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Drill rod with axial air passageway and method of making same2001
Tap hole drill for steelmaking vessel1998
Hand connect-disconnect coupling for blast furnace tap hole drill rod assembly1992
Blast furnace tap hole drill with centralizing drill rod support1991
Extension bar for blast furnace tap hole drill1991
Apparatus for preparing rod stock for forging in manufacture of sucker rods1985
Method of making class D sucker rods1984
Class D sucker rods1984
Method of normalizing sucker rods using a normalizing unloader1984
Method and apparatus for opening blast-furnace tap holes1984