Valve unit for a quick-changer and quick-change system
US10214873B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2016 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Apr 27, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/8633
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a valve unit for the exclusive hydraulic actuation of the locking means of a mechanical quick-changer for attachments of a construction machine, wherein the valve unit comprises a feed pressure connector for applying the feed pressure, a first valve unit outlet for connecting an unlocking pressure line, a second valve unit outlet for connecting a locking pressure line, at least one discharge to the tank, and at least two switchable directional valves, with the feed pressure connector being connected or connectable to the second valve unit outlet via a serial connection of the at least two switchable directional valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.