Power tongs control arrangement
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United States of America Patent
Stats
-
May 13, 1980
Issued Date -
N/A
app pub date -
Apr 4, 1979
filing date -
Mar 15, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for controlling a tongs arrangement which includes a tongs lift and lift speed arrangement, a backup tong and a power driven tong, is characterized by means for generating electrical signals to lift the backup tong and power tong at a predetermined speed to a predetermined elevation, means for generating an electrical signal to close and lock the backup tong when lifted, and means for generating an electrical signal to drive the power driven tong when the backup tong is closed and locked.
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