Overshot device

摘要

A device with an overshot including a first part with an elongated body adapted to be connected to a hoisting line in one end and with a tubular opening arranged/designed to receive a spearhead in the other end. The overshot further includes a second part with a scissor like mechanism including two lifting dogs arranged to pivot around a common pivot pin. The lifting dogs are connected via a biasing unit and the elongated body includes a central, axially extending slot. The scissor like mechanism is arranged with the common pivot pin sliding in the slot between a first end position where the biasing unit is arranged to close the lifting dogs such that a spearhead received in the tubular opening is locked and a second end position where an opener including an opening pin is arranged to force the lifting dogs open against the force of the biasing unit, such that a spearhead received in the tubular opening is released.

主权项

1. An overshot device, comprising:
a first part with an elongated body adapted to be connected to a hoisting line at a first end and with a tubular opening adapted to receive a spearhead in a second end, the elongated body comprising an central, axially extending slot, a second part with a scissor like mechanism comprising two lifting dogs and a common pivot pin about which the two lifting dogs are arranged to pivot, wherein the common pivot pin extends into the slot, a biasing unit operatively connecting the lifting dogs to each other, and an opener comprising an opening pin, wherein the scissor like mechanism is arranged with the common pivot pin sliding in the slot between a first end position where the biasing unit is arranged to close the lifting dogs such that the spearhead received in the tubular opening is locked and a second end position where the opener is arranged to force the lifting dogs open against a force of the biasing unit such that a spearhead received in the tubular opening is released.