Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7143673 | Method for tube end preparation and milling head therefore Tube ends such as those of boiler tube banks, are prepared utilizing any of various combinations of processes which include a step of micro-diameter tube film removal from a portion of a tube end, including an area below a beveled segment, or segment to be beveled. ... | 12/05/2006 |
| 7055624 | Guide rail system for a power tool A guide rail system (1) for a power tool (2), has at least two axially extending guide rails (3, 3′), at least one guide slide (4, 4′) displaceable on the guide rails (3, 3′) having a coupling part (5a, 5... | 06/06/2006 |
| 6796388 | Drill depth control device This invention provides a roof bolt installation apparatus including a drill stabilizing mechanism including a base having a cylindrical bore therein, and a stabilizing rod extendable from the base and slidably located in the bore. The rod has a distal end, and a dr... | 09/28/2004 |
| 6666282 | Impact tool carriage system A carriage system supports an impact or driver tool. The carriage system has a support member that extends upwardly from a base platform. Support arms are rotatably connected to the support member at medial portion of the arms at different elevations abov... | 12/23/2003 |
| 5375313 | Device for the removal of a liner bolt from a sag mill A device for the removal of a liner bolt from a SAG mill including a support member for affixing to an exterior surface of the SAG mill and a ram affixed to the support member and having an end movable relative to the support member. The end serves for co... | 12/27/1994 |
| 5007492 | Safety stabilizer for auger A safety stabilizer for an auger having a screw, and an engine, and handles, and having two stabilizer legs, swingable upper joints on each leg, and anchors on the lower end of each leg.... | 04/16/1991 |
| 4964475 | Drilling device for producing drill holes with undercut A drilling device for producing drill holes with undercuts comprises a drill having a drill shaft with extending drill blades, a shoulder projecting from the drill shaft, and a guiding sleeve surrounding the drill shaft between the shoulder and the drill ... | 10/23/1990 |
| 4202416 | Method and apparatus for sinking a cased borehole for producing cased pile foundations Method for sinking a cased borehole for producing cased pile foundations. The method uses an apparatus comprising a crane, a drilling appliance capable of being lowered into the borehole and a tube extraction machine with double-acting lifting cylinders f... | 05/13/1980 |
| 4191267 | Raise-boring A drill hole in a rock body is collared by drilling a pilot hole into a tunnel, advancing the pilot drill across the tunnel to drill a hole in the opposite wall of the tunnel aligned with the pilot hole, mounting the borer head on an arbor located across ... | 03/04/1980 |
| 4154311 | Drilling assembly A drilling assembly includes a drilling tool having a shank and a drill bit at the leading end of the shank and having cutting edges. The assembly further includes a collar adjustably and arrestably mounted on the shank, and an abutment member having a ce... | 05/15/1979 |
| 4029160 | Drilling machine A drilling machine for drilling floors or walls having a frame in which a drilling rod is displaced by a screw member. A container on the frame is placed around the drilling rod to fasten the frame to the floor or wall, to cool the drill, and to collect t... | 06/14/1977 |
