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| Number | Title | Issue Date |
| 5813478 | Pulse tool A pulse tool, especially a nutsetter, comprises a pulse unit including a hydraulic cylinder driven by a motor, and a driven shaft supported in the hydraulic cylinder. Two seal rollers are supported in radial grooves of the driven shaft. The rollers are po... | 09/29/1998 |
| 4685050 | Method of tightening threaded fasteners The invention is directed to a method for tightening threaded fasteners by means of a controlled fastener-driving tool. The tightening of the fasteners is controlled by the elastic limit thereof. The slope of the actual load-strain characteristic curve is... | 08/04/1987 |
| 4124026 | Procedure and apparatus for screwing implants into bones An artificial hinge pin having a self-cutting threaded portion is inserted into a prepared bone with reduced reaction moment by a hand-held power tool which imposes a rotary oscillating movement on the pin during the insertion process. The tool has an out... | 11/07/1978 |
