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| Number | Title | Issue Date |
| 4752159 | Tapered thread forming apparatus and method A thread cutting apparatus and method are disclosed for the formation of tapered threads on the end of an elongated reinforcing bar of the type used in concrete structures. The apparatus includes a cutting head assembly having tool holder arms that are ca... | 06/21/1988 |
| 4648757 | Precision adjustment system for boring tools A system is disclosed for automatic radial adjustment of a boring tool in a machine tool spindle to accurately size a bore in a workpiece within extremely close tolerances over a wide range of bore sizes. The system includes a boring tool mounting a toolh... | 03/10/1987 |
| 4575294 | Anchoring bolt An anchoring bolt (1), which can produce a conical undercut by rotation in a cylindrical hole and serves simultaneously as a securing element has a connection portion (2), a shaft (4) and an insertion portion (5). The insertion portion (5) has an axially ... | 03/11/1986 |
| 4505625 | Boring device A boring head (10; 50) for internal machining of bores in workpieces comprising an insert holder (16; 41) and an operating means (18; 27; 51, 52) resting thereagainst. The operating means is adapted to adjust the insert holder (16; 41) radially when turne... | 03/19/1985 |
| 4425693 | Retractable knife for skiving tool A skiving tool having a retractable knife for use in combination with a roller burnishing tool for finishing the internal surface of a cylindrical hole. The retractable knife includes a pair of radially extendible knife holders defining a camming path hav... | 01/17/1984 |
| 4033207 | Generating head structure Generating head structure including a generally cylindrical housing having a bore extending therethrough axially of the axis of generation thereof, a slide positioned across the bore at one end of the housing, keeper plates secured to the housing at the o... | 07/05/1977 |
