Brake system for a well service or drilling hoist
US7513338B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 2006 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | May 27, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D49/20
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The brake system includes a brake lever independent of, but capable of rotating about the same point as a bell crank. Upon receiving a downward force, a member extending from the lever strikes a portion of the bell crank and generates a force that cause the bell crank to rotate. Rotational action of the bell crank transfers rotational energy to an equalizer bar thorough a linkage system. The equalizer bar's rotation increases or decreases tension on brake bands that slow a tubing drum. A cylinder can activate and cause the equalizer bar to rotate, applying tension to the brake bands and slowing the drum. Rotational energy is transferred back to the bell crank through the linkage. The rotational energy is absorbed by a spring positioned between the bell crank and the brake lever, thereby reducing the amount of sudden force passed through the brake lever to an operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.