Method and apparatus for the shock pressure shaping
US4152921A · kind A · utility
6Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 24, 1977 |
| Grant date | May 8, 1979 |
| Priority date | — |
| Expiry date | May 24, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/7052
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An impact shaping apparatus is provided having a hydraulic actuator associated to the shaping tool. A gas spring of adjustable spring constant is in permanent fluid connection with the hydraulic actuator so as to allow for adjustment of the impact characteristics in accordance with the cold-working characteristics of the material to be shaped. The gas spring is formed by a cylinder and a floating piston arranged therein and defining a first working space communicating with the hydraulic actuator and a second working space containing a mass of gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.