Method for controlling the slewing movement of the rotary part of a tower crane
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 7, 2012
Grant Date -
Jan 14, 2010
app pub date -
May 13, 2009
filing date -
May 22, 2008
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary part of a crane is associated with an electric slewing mechanism including at least one geared electric motor unit of which the electric motor is powered in such a way as to produce a slewing torque having a certain maximum value. When the crane is in use and for conditions such as windspeed greater than a given value, jib length greater than a given value and moment of the lifted load greater than a given value, the maximum value of a slewing torque produced by the electric motor is increased. The crane thus becomes easier to drive, particularly in the phases during which the jib is adopting a “windward trend”.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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