Hydraulic main valve and auxiliary valve
US8905077B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jun 23, 2010 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Jan 27, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86574
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a hydraulic auxiliary valve device (1) adapted to be connected to a hydraulic main valve (20) on a work vehicle, which work vehicle comprises a hydraulic system comprising a pump and a tank, the auxiliary valve device (1) comprises: —a first motor port connection (4A) and a second motor port connection (4B) arranged to be connected to a first motor port and a second motor port, respectively, on a double acting hydraulic motor, in particular a double acting hydraulic cylinder, —a pump lead-through (2), which connects the pump input port connection (2A) of the auxiliary valve device (1) to the pump connection output port (2B); —a tank lead-through (3), which connects the tank input port connection (3A) of the auxiliary valve device (1) to the tank connection output port (3B); and —a control valve (IA) provided with two open positions, which control valve (1A) in the first open position connects the pump input port connection (2A) to the first motor port connection (4A) and the tank input port connection (3A) to the second motor port connection (4B), and in the second open position connects the pump input port connection (2A) to the second motor port c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.