Electro-hydraulic interface for a power tongs

Details Electro-hydraulic interface for a power tongs Electro-hydraulic interface for a power tongs

B - Operations, Transporting

25

B

138/78.1

B25B 13/50 (2006.01) E21B 19/20 (2006.01) F15B 9/17 (2006.01) G06G 7/66 (2006.01)

Patent

CA 1092944

ELECTRO-HYDRAULIC INTERFACE FOR A POWER TONGS ABSTRACT OF THE DISCLOSURE A manually operable valve in a power tongs assembly has, in combination therewith, an electro-hydraulic interface module. The interface module comprises an electrically responsive solenoid valve connected in hydraulically parallel path to the manually operated valve. The manually operated valve may be selectively disenabled and the electrically responsive valve simultaneously enabled to permit electrical control of the power tongs assembly.

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