Hydraulic nut and improved seals therefor
US8556557B2 · kind B2 · utility
1Cited by
18References
17Claims
0Family size
Inventors
Key dates
| Filing date | Apr 14, 2006 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | May 9, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B33/004
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic nut for tensioning an assembly comprises a mechanical threaded locking collar to minimize load loss during transfer of hydraulic load to the locking collar, an annular piston, an annular pressure area to generate an axial load under hydraulic pressure, a hydraulic pressure port and preferably metallic seals to maintain the hydraulic pressure within the annular pressure area that operates in an elastic region and continues to actuate hydraulic pressure after repeated operating temperature cycles. The seals of the hydraulic nut have a ‘U’ or ‘C’ shaped cross-section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.