Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 7316528 | Ergonomic router assembly An ergonomically designed router assembly includes a base assembly coupled with a motor casing including a grip assembly which provides an overall narrower profile to the router assembly. The grip assembly may relieves stress on the muscles and allows the operator t... | 01/08/2008 |
| 7308949 | Concrete drill A concrete drill for drilling concrete or the like by a diamond bit (5) attached to a front end of a bit drive shaft (4) projected forward from a main body (1) by driving to rotate the bit drive shaft (4) by a drive source (2) cont... | 12/18/2007 |
| 7014548 | Pneumatic grinder with easily replacing grinding disc A pneumatic grinder with easily replacing grinding disc, including: a main body in which a rotary shaft is eccentrically pivotally connected with and is driven by a drive shaft of the pneumatic grinder, a bottom end of the rotary shaft being for mounting a grinding ... | 03/21/2006 |
| 7011167 | Device for sealing a drill hole and for discharging drillings or stripped extraction material In a device for sealing a bore hole and discharging drill cuttings and stripped excavation material, including a housing adapted to receive sealing elements and an opening capable of being connected to the bore hole, one side wall of the housing is provided with at ... | 03/14/2006 |
| 6000888 | Quick coupler mechanism for power tool bits A pneumatic impact power tool has a tool body with a bit-receiving axial bore in its end surface. A cap is threaded on the end of the tool body and has an end wall spaced from the end surface to define a cavity and a lobed opening in the cavity matably re... | 12/14/1999 |
| 4429752 | Pneumatic motor for rock drills and the like A pneumatic motor for rock drills and the like having a reciprocating piston with valves at its opposite ends for valving motive air to the piston head from both ends of the cylinder. Large receivers are provided near the respective valves to accommodate ... | 02/07/1984 |
| 4197886 | Fastener driving tool and fastener holding nosepiece In a fastener driving tool having a fastener holding nosepiece comprised of three concentric sleeves, the middle one of which is axially movable to carry a circumferential array of radially shiftable balls to and from inwardly cammed engagement against ca... | 04/15/1980 |
| 4197908 | Apparatus for porting a side wall of a conduit from interiorly thereof An apparatus for forming a port in a liner installed in a conduit having a lateral opening inwardly overlaid by the liner so that the port coincides with the lateral opening, including a carriage adjustably positionable longitudinally within the liner adj... | 04/15/1980 |
| 4175359 | Fluid powered orbital wet sander and the like A lightweight, portable, fluid-driven orbital wet sander or the like comprising a fluid-driven, nutating action motor including a rod-like output element and a sanding or scrubbing device directly linked to a projecting end of the output element. The nuta... | 11/27/1979 |
| 4073349 | Balanced reciprocating tool driven by rotary motion A reciprocating tool, such as a sander, which may be driven by a rotary pneumatic motor via an eccentric connection with a gear train. In order to balance the dynamic forces generated by the reciprocating tool element, a weight may be properly positioned ... | 02/14/1978 |
