Swivel
US6637969B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2001 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32975
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A swivel for placing utility product with horizontal directional drilling techniques comprising a head piece and a tail piece rotationally mounted on the head piece. A bearing assembly of oppositely disposed units with high thrust capacity and self-alignment properties is mounted on a stub shaft integral with the head piece and enclosed by a shell body associated with the tail piece. A gap between the head piece and shell body is sealed with a metal face seal assembly. A juncture between the shaft and main part of the head piece is shaped to avoid a stress riser condition and a thrust washer has a configuration complimentary to the juncture to transmit forces between the head piece and bearing assembly. A joint between the tail piece and shell body is locked with a weld bead technique that enables the unit to be refurbished with reduced labor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.