Hand connect-disconnect coupling for blast furnace tap hole dril

Details Hand connect-disconnect coupling for blast furnace tap hole dril Hand connect-disconnect coupling for blast furnace tap hole dril

1990-10-26

1992-12-08

Kundrat, Andrew V.

Joints and connections

Structurally installed in diverse art device

403343, 285390, F16D 100

Patent

active

051692562

ABSTRACT:
The component parts of a drill rod assembly on a blast furnace tap hole drill are joined together by providing a unique threaded coupling in which the threads do not torque tightly against each other but maintain a loose, floating relationship to thereby permit the coupling to be threaded together by hand without the use of a wrench, and such that the drilling action of the percussion drill will maintain the components in a joined relationship.

REFERENCES:
patent: 1642183 (1927-09-01), Thurston
patent: 2052019 (1936-08-01), Baker
patent: 3258284 (1966-06-01), Phipps
patent: 3586353 (1971-06-01), Lorenz
patent: 4295751 (1981-10-01), Holmberg
patent: 4687368 (1987-08-01), Eklof et al.
"Brunner & Lay, Inc. Timken Rock Bit Division Percussion Rock Bits", Brunner and Lay, Inc. Form 022, p. 12.
Print of Brunner & Lay, Inc. drawing showing parameters for machining trapezoidal threads on a 1.5 inch drill rod.

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