Barrier-guarded stamping press control
US4039060A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1975 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Apr 16, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D55/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A stamping press system, the press having a ram, a driving means for the ram, and an electrically energizable ram control device for causing the driving means to drive the ram through a stamping cycle. The press is guarded by a barrier movable between an open position permitting operator access to the point of stamping operation and a closed position barring such access. A press trip control for the system has a pair of actuators, one for each hand of the operator. Upon their concurrent actuation, the actuators cause movement of the barrier to the closed position and energization of the ram control device initiating a stamping cycle. Provision is included for preventing such energization thereby preventing a stamping cycle if the barrier is not closed. Circuitry of the system prevents re-energization of the ram control device, thus preventing a further cycle until the operator has removed both hands from the actuators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.