Jacking apparatus having a fast repositioning stroke
US4506867A · kind A · utility
6Cited by
8References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1981 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Dec 17, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/7056
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A jacking apparatus and method for effecting movement of loads. At least two double-acting hydraulic cylinders including a first and a second cylinder arranged in tandem provide increased force for a power stroke of the apparatus. Hydraulic fluid pressure is provided at a predetermined flow rate to the group of hydraulic cylinders. Substantially all of the predetermined flow rate of hydraulic fluid is routed to the first hydraulic cylinder to provide increased speed for a repositioning stroke of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.