Mast leg pulley
US9512676B2 · kind B2 · utility
3Cited by
23References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2015 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Mar 5, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B15/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mast system includes a first leg of a mast pivotally connected to a pivot support and a second leg of the mast pivotally connected to a leg support. The leg support has a first support end with a surface connector to attach to a rig surface and a second support end with a leg connector to connect to the second leg to form a joint. A cable with a first cable end is attached to the leg support, and a force is exerted on the leg support through the cable that causes the leg support to rotate about the joint when the mast is lowered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.