Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5333480 | Method for straightening out of true work pieces, especially crankshafts | — | 1994-08-02 |
| 5235838 | Method and apparatus for truing or straightening out of true work pieces | — | 1993-08-17 |
| 5001917 | Method and apparatus for truing or straightening out of true work pieces | — | 1991-03-26 |
| 4895057 | Machine tool for broaching crankshaft connecting rod bearings | Hans W. Obrig, Helmut Wittkopp, Hermann Wolters | 1990-01-23 |
| 4861204 | Turn broaching tool | Hans W. Obrig, Helmut Wittkopp | 1989-08-29 |
| 4799839 | Method and apparatus for performing a rotary broaching operation particularly on work pieces of rotational symmetry | Hans W. Obrig, Helmut Wittkopp, Hermann Wolters | 1989-01-24 |
| 4782682 | Rolling Mill Tool | — | 1988-11-08 |
| 4782680 | Method for rolling a shaft or tenon having cross-bored holes | — | 1988-11-08 |
| 4766753 | Rolling apparatus for surface hardening or smoothing | Willi Hansen, Rudolf Winkens | 1988-08-30 |
| 4747286 | Rolling apparatus | Willi Hansen, Rudolf Winkens | 1988-05-31 |
| 4747285 | Surface-hardening or smoothing rolling machine | Willi Hansen, Rudolf Winkens | 1988-05-31 |
| 4561276 | Method of deep-rolling crankshafts | — | 1985-12-31 |
| 4542565 | Rolling tool | Siegfried Bagusche | 1985-09-24 |
| 4539831 | Method for setting the stroke of movable rolling units, and crankshaft rolling machine for implementing said method | Willi Hansen, Rudolf Winkens | 1985-09-10 |
| 4485537 | Machine for the machining of crankshafts | Willy Hansen | 1984-12-04 |
| 4371296 | Cutting tool for internal and external turning operations | Walter Riedel | 1983-02-01 |
| 4327568 | Method for the cold rolling of parts | — | 1982-05-04 |