Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 5746276 | Method of rotating a tubular member A tool 60 for rotating a tubular member 80 passing through a slip assembly 66 is powered by a rotary table 62 of a drilling rig. Tool 60 includes a cam ring 8 having a plurality of interior camming surfaces 82 thereon, and a cage plate assembly 84 rotatab... | 05/05/1998 |
| 5566769 | Tubular rotation tool for snubbing operations A tool 60 for rotating a tubular member 80 passing through a slip assembly 66 is powered by a rotary table 62 of a drilling rig. Tool 60 includes a cam ring 8 having a plurality of interior camming surfaces 82 thereon, and a cage plate assembly 84 rotatab... | 10/22/1996 |
| 4681193 | Rotary power slips Rotary power slips mounted in the rotary table of an earth drilling rig and having slips for gripping and releasing pipe in the rotary table. The air transfer ring has concentric grooves in the upper surface. An annular seal ring is secured to the body of... | 07/21/1987 |
| 4441563 | Tool collet and control means A power tool, such as a surgical drill, has a tool element retained in a collet coupled to the output spindle of the tool. Resilient member constantly maintains the collet in its closed position. Upon rotation of the spindle in a reverse direction, opposi... | 04/10/1984 |
| 4297771 | Pivoting foot clamp and mounting frame For clampingly holding a drill rod or the like, clamp apparatus that includes a mounting frame having spaced side members, a jaws holder having upwardly diverging end walls and bounding an opening for clamp jaws, longitudinally spaced jaw actuators that i... | 11/03/1981 |
| 4116287 | Well drilling assembly and method A well drilling assembly including a platform adapted to support a person while drilling a well therebeneath through an opening in the platform includes a clamp assembly carried by the platform and mounted for rotation with respect thereto. The clamp asse... | 09/26/1978 |
| 4018471 | Rotating head A clamp is attached to a drill pipe beneath the rotating head when the pipe is pulled from the well. Not only does the clamp hold the rotating head in place, but, also, a ring-like handhold is provided on the clamp for handling the pipe with the drilling ... | 04/19/1977 |
