| 摘要 |
<p>The present invention concerns a device with an overshot (1) comprising a first part with an elongated body (2) adapted to be connected to a hoisting line in one end and with a tubular opening (3) arranged/designed to receive a spearhead in the other end. The overshot (1) further comprises a second part with a scissor like mechanism (5) comprising two lifting dogs (6, 7) arranged to pivot around a common pivot pin (8). The lifting dogs (6, 7) are connected via a biasing means (10) and the elongated body (2) comprises an central, axially extending slot (12). The scissor like mechanism (5) is arranged with the common pivot pin (8) sliding in the slot (12) between a first end position (13) where the biasing means (10) is arranged to close the lifting dogs (6, 7) such that a spearhead received in the tubular opening is locked and a second end position (14) where an opening means (9) is arranged to force the lifting dogs (6, 7) open against the force of the biasing means (10), such that a spearhead received in the tubular opening (3) is released.</p> |
