Security locking bolt
US4537543A · kind A · utility
Inventors
Key dates
| Filing date | Jul 11, 1983 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Jul 11, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/5867
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A security locking bolt for flanging "Christmas tree" installations, valves and other equipment to a pipeline header or a pipeline, which includes a bolt body having a partially threaded bore and a security bolt head integrally provided on one end and a cooperating locking head secured to the opposite end of the bolt body by means of an internally-seated locking bolt which threadably cooperates with the internal threads in the bolt body. In a preferred embodiment a roller bearing is also provided in the bolt body bore and an end cap closes the locking bolt access opening in the locking head. In another preferred embodiment of the invention a grease fitting is threadably inserted in the security bolt head and longitudinal apertures are provided in the roller bearing and the locking bolt in order to provide a means for inserting grease into the threaded bore and removing the end cap situated in the locking head, by application of pressure. In another preferred embodiment of the invention a key set is provided in the security bolt head to provide limited access to the grease fitting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.