| Patents for B21D 55 - Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass (1,032) |
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| 02/23/1982 | US4316372 Protective device for a drawing press |
| 09/01/1981 | US4286446 Machine control apparatus |
| 06/23/1981 | CA1103787A1 Press control system |
| 03/17/1981 | US4255955 Automatic safety mechanism for forming machines |
| 01/28/1981 | EP0023092A1 Abnormal condition sensing method and monitor system for use with machine tools |
| 12/30/1980 | CA1092505A1 Method and apparatus for safety for presses and the like |
| 11/11/1980 | US4232773 Safety device for mechanical eccentric cam presses |
| 09/02/1980 | US4220032 Power press break guard |
| 08/12/1980 | US4217068 Protecting device of a clamping means for a sheet-shaped material working machine |
| 06/10/1980 | US4206666 Press control system |
| 06/03/1980 | US4205567 Apparatus for safety operating presses and the like |
| 03/11/1980 | US4192414 Hydraulic press tool protection arrangement |
| 12/11/1979 | US4177666 Method and apparatus for safely feeding a machine manually |
| 07/31/1979 | CA1059366A1 Fail safe press brake guard |
| 09/26/1978 | US4116050 Press load meter |
| 09/12/1978 | CA1038477A1 Apparatus and process for protecting machinery |
| 05/09/1978 | US4088899 Method for controlling an automatic machine tool |
| 03/14/1978 | US4078462 Guard for a punch press |
| 08/30/1977 | US4044445 Apparatus for attaching end stops to fastener stringers with a safety stop function |
| 08/16/1977 | US4041765 Press brake guard |
| 08/02/1977 | US4039060 Barrier-guarded stamping press control |
| 07/26/1977 | US4037699 Safety apparatus for a punch press |
| 07/19/1977 | US4036343 Fail safe press brake guard |
| 06/28/1977 | US4031731 Alert means for a programming system for press brakes or the like |
| 06/21/1977 | US4030364 Safety guard for press brakes |
| 05/10/1977 | US4023044 Automatic machine tool including a monitoring system |
| 02/08/1977 | US4006655 Device for protecting tools and workpieces from damage on a hydraulically or pneumatically operated stamping press |
| 11/16/1976 | US3991639 Apparatus for protecting tools of hydraulic presses |
| 09/14/1976 | US3979980 Apparatus and process for protecting machinery |
| 09/07/1976 | US3978701 Power roll mill guarding device |
| 03/23/1976 | US3945230 Process for automatically interchanging die assemblies in a metal working press and apparatus therefor |
| 02/24/1976 | US3939748 Hydraulic punch press with ram orienting mechanism |