| 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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| 10/29/1998 | WO1998047645A1 Machine |
| 10/21/1998 | EP0871836A1 Optical safety device for mounting on a moving member |
| 09/29/1998 | US5813275 Safety circuit for press die cushion |
| 06/24/1998 | CN1185377A Safety protector for rigid-clutch open presser |
| 06/16/1998 | US5765458 Die follow confirming method |
| 01/15/1998 | WO1998001243A1 Press brake, mold layout display method in press brake, and interference check method and apparatus |
| 12/02/1997 | US5692736 Method for vibration damping of workpiece transport device driven elements |
| 07/17/1997 | WO1997025568A1 Optical safety device for mounting on a moving member |
| 04/22/1997 | US5622069 Stamping die with attached plc |
| 04/16/1997 | CN2252065Y Force leading type safety device for punch |
| 04/09/1997 | CN2251453Y Automatic fetching device for punching machine |
| 03/19/1997 | CN1145286A Detecting apparatus for abnormalities in work holder |
| 01/15/1997 | CN2244970Y Material stop inductor for automatic punching machine |
| 01/08/1997 | CN2244441Y Automatic monitor for punching machine |
| 12/24/1996 | US5586465 Press brake controller positioning system |
| 12/17/1996 | US5584216 Tool with breakage sensor and method |
| 10/30/1996 | CN2238687Y Safety protection hand for punch press operation |
| 10/16/1996 | CN2237503Y Automation operation machine for single punching machine |
| 10/09/1996 | CN2236911Y Micro adjusting device for dead point induction and measuring operation distance for punching machine |
| 10/01/1996 | US5560290 Safety apparatus in power press machine |
| 09/11/1996 | CN2234832Y Rotary disk punch press relief mechanism |
| 08/07/1996 | CN2232330Y Electic actuating apparatus for punching machine safety device |
| 03/06/1996 | CN2221454Y Vertical safety protector for punch press |
| 01/24/1996 | EP0693333A1 Vibration damping method for driven elements in workpiece transfer devices |
| 01/18/1996 | WO1996001159A1 Safety circuit for a press die cushion |
| 01/10/1996 | CN2216875Y Guide pin unpositioning safety clutch device |
| 01/04/1996 | DE4421728A1 Audio signal system for stamping machine or punching press |
| 12/21/1995 | DE4421463A1 Acoustic signal device for warning of non-ejection of workpiece from stamping machine |
| 12/20/1995 | CN2215364Y Pendulum type slave safety device |
| 12/13/1995 | CN2214853Y Safety protecting device for punch press |
| 09/13/1995 | CN2207244Y Adjustable sweepings sensing device arranged between upper and lower mould of punch |
| 08/23/1995 | CN2205753Y Safety working arm device for punching machine |
| 07/13/1995 | DE4338458A1 Output signalling attachment for punching machine |
| 06/28/1995 | CN2201996Y Guiding-pin safe locker for mold |
| 06/21/1995 | CN2201191Y Punch press buffer |
| 05/11/1995 | DE4337662A1 Signal device for punching machines |
| 03/28/1995 | US5400677 Shield for engraving machines |
| 11/03/1994 | DE4314104A1 Device for fastening a foot pedal, which initiates an operating stroke, on a punching or pressing machine, in particular a bending press |
| 10/12/1994 | CN2179215Y Unusual punching machine punching automatic stop device |
| 07/27/1994 | EP0607498A1 Method for operating a cutting press and cutting press |
| 07/13/1994 | CN2171432Y Photoelectric sensor for safety press |
| 06/15/1994 | CN2168667Y Hand protector of punching machine |
| 06/07/1994 | US5317892 Metal forming machine, contactless sensor coupling therefor |
| 04/19/1994 | US5303641 Method for checking the driving and control system of hydraulic punch brakes |
| 03/09/1994 | CN2158312Y Safety protection apparatus for infrared stamping machine |
| 10/27/1993 | CN2144542Y Safety device protecting operator for punching machine |
| 09/15/1993 | EP0560054A1 Automatic workholder collision avoidance system for a press |
| 09/10/1993 | CA2088533A1 Automatic workholder avoidance system for a press |
| 04/14/1993 | CN2129661Y Punching safety material releasing device |
| 04/06/1993 | US5199338 Automatic workholder avoidance system for a press |
| 02/12/1992 | CN2095721U Swing lever type safety hand sueep device |
| 10/23/1991 | CN2087107U Safety controlling device for press and shearing machine |
| 08/06/1991 | US5036752 Hydraulic actuator having fail-safe feature with energy absorbing sleeve |
| 06/26/1991 | CN2079540U Safety tool for permanent magnet adjustable punching machine |
| 06/12/1991 | EP0432094A2 Process for controlling the operation of a hydraulic press |
| 05/22/1991 | CN2077337U Safety controller for punching machine with double-safety device of infrared reflection |
| 03/27/1991 | EP0419344A1 Metal working machine for flat pieces with improved security |
| 02/13/1991 | EP0412956A1 Method and apparatus for identification of punch breakings at sheet perforating tools |
| 02/07/1991 | DE3925731A1 Punch press with hydraulic multi-punch head - has supply to each actuating cylinder for punch working stroke but only common supply for return |
| 01/09/1991 | CN2068867U Safety-protecting device of open blanking press |
| 06/12/1990 | US4932823 Can end tab sensing apparatus |
| 05/31/1990 | DE3938854A1 Monitoring punching tools during punching process - by detecting parameters, e.g. body signal noise and punching force, in time correlation with punching process |
| 03/15/1990 | DE3830488A1 Electronic tool-recognition system for press brakes |
| 02/14/1990 | CN2052690U Magnetic controlled safety protection installation |
| 01/25/1990 | DE3824734A1 Electronic tool-recognition system |
| 11/08/1989 | CN2047199U Safety device of punching machine |
| 09/12/1989 | US4866429 Automated machine tool monitoring device |
| 08/31/1989 | DE3903555A1 Punching device |
| 07/05/1989 | CN2040409U Safety manipulator of punching machine |
| 06/06/1989 | US4837656 Malfunction detector |
| 05/31/1989 | EP0318366A1 Safety device for the drive of a machine such as a bending press |
| 05/17/1989 | CN2037649U Safety controller for a punch or a press |
| 04/05/1989 | CN1003835B Mechanical sequence synchronous photoelectric pulse generator |
| 03/16/1989 | DE3739949C1 Stop device for a plate-bending machine |
| 03/01/1989 | CN1031455A Sequential and synchronous mechanical photoelectric pulse generator |
| 09/28/1988 | EP0284217A1 Malfunction detector |
| 06/15/1988 | CN87213856U Magnetic feeding and discharging tool fool punching machine |
| 10/27/1987 | CA1228657A1 Fault detection system for continuously running transfer press |
| 06/30/1987 | US4676421 Press having a programmable ram with sensing means |
| 06/17/1987 | CN86201750U Safety device for punch press |
| 05/06/1987 | CN86106875A Safety protector for punching machine tool |
| 03/04/1987 | CN86202779U Device of prevent something unexpected happen when punch flywhel reverse |
| 01/24/1987 | CN85101057A Safety-protecting device and method for punching machine |
| 01/06/1987 | US4633720 Load monitoring system for progressive dies |
| 01/02/1987 | DE3615328A1 Overload prevention for the longitudinal advancing movement of the gripper rails of transfer presses |
| 12/09/1986 | US4627253 Fault detection system for continuously running transfer press |
| 11/12/1986 | CA1213963A Method and apparatus for safety for presses |
| 09/02/1986 | US4608843 Conversion die with double end sensor |
| 02/19/1986 | CN85200209U Optical electric safety device for punching machine |
| 04/02/1985 | CA1184809A1 Safety control system for metal forming machine |
| 11/20/1984 | US4484119 Fail-safe machine control system |
| 10/23/1984 | US4478320 Overload-responsive clutch apparatus for selective connection of two drive shafts to a single driven shaft |
| 08/21/1984 | US4466317 Method and apparatus for safety for presses |
| 01/10/1984 | US4424741 Press machine safety apparatus |
| 07/05/1983 | US4391358 Hardware press and punch apparatus |
| 11/09/1982 | US4357820 Safety control system for metal forming machine |
| 07/13/1982 | US4339749 Abnormal condition sensing monitor system for use with machine tools |
| 06/15/1982 | CA1125891A1 Automatic machine tool including a monitoring system |
| 05/18/1982 | US4330810 Safety switching device |
| 03/30/1982 | US4321841 Press safety device |