Self-erecting tower crane with bayonet joints between sections
First Claim
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1. IN A TOWER CRANE THE COMBINATION COMPRISING:
- A TOWER FORMED OF A PLURALITY OF SECTIONS;
TWIST CONNECTIONS BETWEEN THE TOWER SECTIONS;
A REVOLVABLE FRAME THAT IS MOVABLE ALONG AND REVOLVABLE ABOUT THE TOWER;
AND JAW MEANS MOUNTED ON AND REVOLVABLE WITH THE FRAME AND ADAPTED TO ENGAGE THE TOWER TO ENABLE THE FRAME TO BE USED AS A WRENCH TO CONNECT AND DISCONNECT THE TOWER SECTIONS.
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1 Claim
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1. IN A TOWER CRANE THE COMBINATION COMPRISING:
- A TOWER FORMED OF A PLURALITY OF SECTIONS;
TWIST CONNECTIONS BETWEEN THE TOWER SECTIONS;
A REVOLVABLE FRAME THAT IS MOVABLE ALONG AND REVOLVABLE ABOUT THE TOWER;
AND JAW MEANS MOUNTED ON AND REVOLVABLE WITH THE FRAME AND ADAPTED TO ENGAGE THE TOWER TO ENABLE THE FRAME TO BE USED AS A WRENCH TO CONNECT AND DISCONNECT THE TOWER SECTIONS.
- A TOWER FORMED OF A PLURALITY OF SECTIONS;
Specification