Power tong with interchangeable jaws
AssigneeMcCoy Bros. Group, A Corporate Partnership
InventorGeorge Dlask
Life of this patent
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Abstract
A power tong that is adaptable to smaller sizes by installing an auxiliary camming assembly against the principle camming surface within the rotary. This auxiliary camming assembly preferably is seated within the neutral recess on the principle camming surface. An auxiliary cage plate carries auxiliary jaw sets.
Claims6
A power tong for engaging pipe, said tong having a rotary gear with an inwardly-facing principal camming surface and a neutral recess, in combination with an auxiliary cam assembly having an auxiliary camming surface positioned inwardly from the principal camming surface and an auxilliary jaw assembly for engagement with said auxilliary camming surface wherein:
- (1) the auxiliary cam assembly is connected to the rotary gear for rotation therewith without differential rotary displacement occurring between the rotary gear and auxiliary cam assembly, and
- (2) said cam assembly has a support post that is inter-fitted within the neutral recess
- whereby outward thrust by the auxiliary cam assembly upon engaging pipe is directed to the rotary gear at its neutral recess.
Dependencies are inferred from the claim text.