Power tong positioner

Material or article handling – Cylindrical bar handling device – Vertical cylindrical bar

Reexamination Certificate

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Details

C081S057340, C414S745200

Reexamination Certificate

active

07413398

ABSTRACT:
A power tong positioning apparatus having a base section and a backup elevating section engaging the base section. A first lift assembly is positioned between the base section and the backup elevating section while a tong elevating section engages the backup elevating section. A second lift assembly is then positioned between the backup elevating section and the tong elevating section.

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patent: WO02/03395 (2002-01-01), None

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