Hydraulic tool release system
US7533556B2 · kind B2 · utility
26Cited by
16References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2006 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Jul 11, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K17/34
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hydraulic tool including a frame; a ram movably connected to the frame; and a hydraulic drive system on the frame for moving the ram on the frame by hydraulic pressure. The hydraulic drive system includes an automatic release system for automatically releasing hydraulic fluid from the hydraulic drive system. The automatic release system comprises a first valve which is adapted to be automatically opened by a predetermined hydraulic pressure and a second valve which is adapted to be opened by hydraulic fluid passing through the first valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.