Overshot

Handling: hand and hoist-line implements – Grapple – Well type

Patent

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Details

294 863, 294 8633, E21B 3112

Patent

active

040048357

ABSTRACT:
An improved overshot for grappling a fishing neck is disclosed. A fishing neck has an undercut shoulder with a protruding enlarging thereabove. This disclosure is directed to an overshot having an upper body and a fixed inner tubular sleeve. The tubular sleeve has elongate supports which extend to a bottom ring. The bottom ring has an internal taper. The internal taper works against the right and left halves of a scissor mechanism. The tips of the scissors are constructed with undercuts to reach below and grab the nether shoulder of a fishing neck. The scissors are normally forced closed by the inner taper of the ring. When a fishing neck is engaged, the scissors are forced upwardly, moving as a unit with the scissors mounted on a pin which pin is supported by an outer sleeve which maintains alignment of the moving apparatus relative to the inner sleeve. The pin extends through slots formed in the inner sleeve. As the scissors are forced upwardly relative to the ring, they can open wider and finally reach under the fishing neck. A spring bearing on the top end of the scissors tends to force them down into closing movement against the inner taper of the bottom ring. Through this technique, a fishing neck can be engaged and disengaged by reciprocating upwardly and downwardly relative to the fishing neck.

REFERENCES:
patent: 1081427 (1913-12-01), Brummett et al.
patent: 1365086 (1921-01-01), Bullum
patent: 1517426 (1924-12-01), Hickman
patent: 1719144 (1929-07-01), Stokes et al.
patent: 2266873 (1941-12-01), Lang
patent: 2296397 (1942-09-01), Muhlback

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