Method and apparatus for decreasing drag force of trigger mechanism
US7510008B2 · kind B2 · utility
26Cited by
9References
12Claims
0Family size
Inventor
Key dates
| Filing date | Jul 16, 2007 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Oct 30, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/1135
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Method and apparatus for decreasing drag force in a mechanism for releasing a mandrel is provided. The mandrel is released by a collet, which is controlled by a trigger sleeve. Most of the axial force on the collet is relieved, thereby decreasing the frictional force exerted by the collet on the mandrel after it is released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.