Rotor for crane-mounted working implements, especially tree-processing units
US4989652A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Sep 13, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B15/149
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotator for crane-mounted working implements comprises a housing (7) swingably connectible with the tip of the crane via a joint, and a pivot shaft (8) connectible with the working implement and pivotal relative to said housing by means of at least one vane or flap (10) operating in a chamber and dividing said chamber into two operating chambers which can be supplied with, or evacuated of, hydraulic medium via two first ducts (12) provided in said housing, said pivot shaft including second hydraulic medium through-ducts (17, 17') opening into annular hollow spaces (16, 16') in a swivel connection (15) incorporated in said housing. Between said first ducts (12) in the housing and the annular hollow spaces (16, 16') of the swivel connection (15), branch ducts (20) are provided for establishing communication between said first and said second ducts (12, 17) for supplying hydraulic medium to the rotator working chambers via said shaft (8), thereby eliminating the need for any hydraulic medium connection on the outside of the rotator housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.