Swivel joint for construction machine
US7798738B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2004 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Jul 29, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L27/093
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A swivel joint for a construction machine is mounted to an upper track frame, and a body is rotatable together with a swing structure main frame in an opening through engagement between a stopper projection and a stopper plate. Tubes on the swing structure side are connected to an upper end surface of the body by using fittings in concentrated layout, and tubes on the travel structure side are connected to a lower portion of the spindle by using fittings. The body has thicker wall portions in sidewalls thereof, and a plurality of axial passages communicating with a plurality of circumferential grooves are formed inside the thicker wall portions. The plurality of axial passages are opened at the upper end surface of the body, and the tubes on the swing structure side are connected to the upper end surface of the body in concentrated layout.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.