Stock feeder for punch presses and the like
US4207999A · kind A · utility
3Cited by
8References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jul 27, 1978 |
| Grant date | Jun 17, 1980 |
| Priority date | — |
| Expiry date | Jul 27, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D43/11
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved control circuit for the pneumatically operated punch press feeder illustrated in U.S. Pat. No. 3,038,645; the use of which circuit permits a simplification of the construction of the feeder by enabling the stock clamping as well as the stock gripping motors of feeder to be single acting. This improved circuit and the resultant simplification of structure will allow benefits of the sequencing action of the dual valve system to be retained while reducing the cost of manufacture and maintenance of such a feeder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.