Hydraulic unit
US7891181B2 · kind B2 · utility
5Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 2006 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Aug 9, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/88
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A hydraulic unit, in particular for lifting and lowering loads in stacking trucks, has at least one working cylinder (10). The piston/rod unit (12) of the cylinder is guided movably in a housing (22). By a hydraulic pump (25), the piston/rod unit can be extended in its one drive direction (30) and can be retracted in its other opposite drive direction (32). A control device (20) actuates the displacement movements to that effect. A storage device (38) is fed energy in one drive direction (32). The energy fed in can be called up from the storage device (38) to assist a displacement movement in an opposite drive direction (30).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.