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 |
| 7325811 | Chuck A chuck (2) for a hand-held power tool (4), which is connected with a motor-driven spindle (6) of the power tool for joint rotation therewith, includes a locking device for securing a shaft section of an exchangeable working tool and having a ci... | 02/05/2008 |
| 7195247 | Tool joint A joint is disclosed for connecting a handle with various bits. The joint includes an insert fit in the handle, a socket connected with the insert for receiving the bits, a first locking device installed on the socket for locking long bits to the socket and a second... | 03/27/2007 |
| 7112016 | Universal quick change hole saw arbor An arbor assembly includes a shank mounted to the chuck of an electric drill, an adaptor which supports a hole saw mounted to the shank, and a sleeve for locking and unlocking the adaptor and the shank. Rotational forces from the drill are transferred to the adaptor... | 09/26/2006 |
| 7044480 | Non-impact keyless chuck A non-impact keyless chuck suitable for use with manual or powered drivers is disclosed. The chuck comprises a body which carries a rotatable split nut having a relatively fine thread and a plurality of slidable jaws, which may be identical, driven by the rotatable ... | 05/16/2006 |
| 6811160 | Tool-holder fixture An improved tool-holder fixture, more specifically for tool holders, pincer holders and mill holders, designed for the mounting and dismounting thereof, which comprises a cage body (1) constituting the main support body for a needle bearing (2), a cove... | 11/02/2004 |
| 6554290 | Tool structure for clamping a tool head quickly A tool structure includes a tool having a rotation shaft formed with a central hole for insertion of the distal end of a tool. The rotation shaft is provided with a cover, and has an outer wall mounted with an elastic member and a drive member. A drive sh... | 04/29/2003 |
| 5577743 | Quick release chuck device A quick release chuck device includes a body member having an internal bore for receipt of a tool shank. The body member is matable to a drive spindle. A plurality of circumferentially spaced passages are defined in the body member, with each passage defi... | 11/26/1996 |
| 5354075 | Keyless drill chuck A keyless drill chuck apparatus includes a tubular body having a longitudinal bore that includes first and second bore sections. The first bore section is of a smaller diameter and is closer to the proximal end portion of the drill, that end portion that ... | 10/11/1994 |
| 4981057 | Clamping device for connecting a tool head to a tool holder of a machine tool A tool head is clamped in a tool holder by rotating a radial or axial clamping shaft which has spiral camming surfaces urging clamping elements outwardly to engage ramps on the pin of the tool head which is received in a socket of the tool holder. The spi... | 01/01/1991 |
| 4824298 | Hand-held tool with detachable tool bit chuck A hand-held tool for use as a powered drill or screw driver, has a chuck for holding a tool bit, and the chuck is replaceable without employing another tool. A conically shaped shaft section on a rotary spindle fits into a conically shaped bore in a socke... | 04/25/1989 |
| 4305597 | Keyless self-tightening chuck A bi-directional, self-tightening chuck for releasably gripping a tool bit such as a twist drill or the like includes a bit receiving nosepiece having a conical, internal opening formed therein. A control sleeve is rotatably mounted, through a thrust bear... | 12/15/1981 |
| 4252333 | Keyless chuck A keyless chuck adapted to grip an object, such as a drill bit, is disclosed. The keyless chuck includes a cylindrical body provided with an axially extending tapered bore. The surface of the tapered bore includes first and second cam surfaces. A control ... | 02/24/1981 |
