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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 6920812 | Centrifugal cutting apparatus A multiple blade centrifugal cutting machine having a planetary gear system for coordinating the motion of the blades so that the blades move into the work at the same speed to an equal depth to either sever the work element or strip away one or more layers of coati... | 07/26/2005 |
| 5881616 | Pipe cutting apparatus A cam mounting gear having a number of teeth smaller by one than the number of teeth of a main gear which is driven to rotate is disposed in parallel to the main gear, and a cam having a tapered face formed thereon such that the thickness thereof graduall... | 03/16/1999 |
| 5813299 | Automatic feed rotary tubing cutter for fuel rod tubing of a nuclear fuel assembly A rotary tubing cutter enables automatic tube cutting without requiring manual rotation of the cutter. The apparatus includes a motor driven gear assembly including a blade gear and a feed gear. The feed gear includes a plurality of cam slots that receive... | 09/29/1998 |
| 5603250 | Radial cutting tool having indexed pair of bit-subassemblies with simultaneous feed for cutting thick-walled tubes Relatively thick-walled (or solid) tubular members may be cut by a cutting tool which includes an annular frame having a rotatable ring which is adapted to surround the tubular member to be cut. A pair of cutting assemblies are radially connected to the r... | 02/18/1997 |
| 5386743 | Turret indexing device In a turret indexing device, a coupling containing three gear members is employed in a turret indexing device to cooperate with an indexing disc mounted on an output shaft which is adapted to hold an indexing head. The coupling is operated by a first cam ... | 02/07/1995 |
| 5217724 | Apparatus for the in-line cropping and/or chamfering of a plastic tube An apparatus for in-line cropping and/or chamfering of a plastic tube. The apparatus includes pressure rollers for deforming a tube section and cutting devices to perform the cropping and/or chamfering operation. The control of movement of the pressure ro... | 06/08/1993 |
| 4671148 | Trimmer for cylindrical objects A trimmer for making a circumferential cut through a hollow cylindrical object. The trimmer has a rotatably cup which holds a blade support assembly which rotates with the rotatable cup. A cam member is supported by the rotatable cup and rotates in the sa... | 06/09/1987 |
| 4655109 | Method and apparatus for severing comparatively long workpieces, such as pipes, in particular at high temperatures For severing long workpieces, in particular pipes of metal material, especially at high temperatures, in a normal plane relative to the axis at an arbitrary site with the aid of a metal-cutting tool, a workpiece is firmly clamped and at a standstill, whil... | 04/07/1987 |
