Power tongs and clamping units therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 22, 1988
Grant Date -
N/A
app pub date -
Mar 9, 1987
filing date -
Mar 9, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power tong has upper and lower clamping units mounted in a suspended support frame. Each clamping unit has pipe clamping jaws that move rectilinearly, and are actuated by a pressure fluid operated linear actuator. The lower clamping unit is rigidly secured to the supporting frame and the upper clamping unit is rotatable relative to the lower clamping unit. The relative rotation in both directions is accomplished by a remote powered actuator.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully