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| Number | Title | Issue Date |
| 7197964 | Wrench A wrench (1) is disclosed having a handle (3) mounted pivotally with a head portion (2) for engaging a drive socket to tighten or slacken a fastener such as a nut, bolt or screw, and a resilient split ring (5) as operative portion interme... | 04/03/2007 |
| 6997654 | Tapping tool for use with drill press A tapping device is configured to be used within a drill press or lathe or other device capable of holding a cylindrical object. The tapping device has an upper projection for being axially fixed in, for example, a drill press. The remainder of the body of the tappi... | 02/14/2006 |
| 6978700 | Wrench assembly A wrench assembly includes a handle and a wrench. The handle includes a head. The wrench includes a first annular ring non-rotationally put in the head of the handle, a second gear rotationally installed in the first annular ring for engagement with a tool bit and a... | 12/27/2005 |
| 5024565 | Hand tool A hand tool can remove burrs from an aperture in a workpiece. The tool has a hollow handle and a shaft rotatably mounted in the handle to reciprocate axially therein. The tool has a thruster for urging the shaft to extend axially. A rider is mounted in th... | 06/18/1991 |
| 4349931 | Threading die couple A tool couple which is used with a manually-operated threading die to aid in cutting the initial threads on a pipe or bolt. The device is used to force the anterior cutting edge of the die firmly against the outer, unthreaded surface of the workpiece at t... | 09/21/1982 |
| 4291727 | Pipeline flow restrictor and process An apparatus and process for restricting fluid flow in a pipeline by inflation of an expandable flexible sleeve which is attached to a plug having a through hole for the inflation fluid. Several embodiments of flow restrictor cartridges are disclosed incl... | 09/29/1981 |
