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 |
| 8016646 | Saw blade sharpening assembly A saw blade sharpening assembly includes a sharpening disk, a blade support panel disposed generally adjacent to the sharpening disk and a generally sloped blade support base carried by the blade support panel. ... | 09/13/2011 |
| 7329172 | Rotary mower blade sharpener having movable griding wheels A device and method for sharpening a mower blade are provided, in which a mounting device for mounting a rotary blade having two opposite cutting edges to be sharpened, wherein the mounting device is capable of positioning the blade in a first fixed state and a seco... | 02/12/2008 |
| 7220169 | Sharpening apparatus A sharpening apparatus (16) for a blade-like cutting implement. The sharpening apparatus has an elongate body (18) and a cutting edge extending widthwise across one end of the body (11) at a predetermined angle relative to the longitudinal axis ... | 05/22/2007 |
| 7118466 | Scissor sharpening machine The scissor sharpening machine includes a honing disc with a curved blade guide and a blade clamp assembly which slides axially along the blade guide. The curvature of the blade guide corresponds to the conventional curvature along the lengths of the blades of a pai... | 10/10/2006 |
| 6926596 | Tool sharpening apparatus An apparatus for sharpening tools includes a sliding tool holder permitting correct positioning of a tool face relative to a planar abrasive surface and the application of uniform pressure to the tool face for accurate grinding of the bevel that defines the cutting ... | 08/09/2005 |
| 6808441 | Dental tool sharpener and method of use A dental tool sharpener is disclosed having a base. A grinding surface is rotatably attached to the base about a fixed axis, the axis of rotation being perpendicular to the base. a positioner is attached to the base and aligns a top face of a blade of a dental tool ... | 10/26/2004 |
| 6475074 | Sharpener attachment for rotary tool A sharpening attachment for sharpening cutting implements with a rotating bit of a tool. The sharpening attachment includes a guide, a mount and a clamp. The guide is adapted for attachment to a rotary tool. The mount is connected to the guide, such that ... | 11/05/2002 |
| 6471569 | Rotary mower blade grinder A device for grinding a rotary mower blade (16), the device comprising an adjustable support for receiving a rotary mower blade, means for fixing the blade relative to the support, means for feeding the support and blade both axially and transversely rela... | 10/29/2002 |
| 6422934 | Skate sharpener A skate sharpening apparatus includes a skate blade holding device, the skate blade sharpening device having a horizontally mounted sharpening wheel which is rotatably driven, and wherein the skate holding device has first and second jaws for contacting o... | 07/23/2002 |
| 5868602 | Method and device for resharpening knives used in size-reduction machines, especially in wood flaking machines The invention is based on the method for the resharpening of knives used in size-reduction machines described in U.S. Pat. No. 5,525,094 in which the knives remain installed in a rotatable knife carrier. With this invention the process has been further de... | 02/09/1999 |
| 5667427 | Method and apparatus for sharpening curved blades A sharpener for blades comprises a movable blade-sharpening surface, a stationary blade guide supported closely adjacent the surface, and a movable support for a blade. The support comprises pivotally interconnected first and second links and a blade hold... | 09/16/1997 |
| 5601473 | Skate sharpening apparatus and method An apparatus and method for sharpening skate blades operate by measuring the length of a skate blade, determining a predetermined profile corresponding to a desired radius of curvature for the blade, and coordinating the motion of a grinding wheel and the... | 02/11/1997 |
| 5287657 | Skate sharpening machine and method A machine for sharpening skates that can be operated by an individual through a coin-operated or credit card operated input, permits a person that wants skates sharpened to place the skate into the machine and have it automatically sharpened in a manner t... | 02/22/1994 |
| 5218787 | Apparatus for sharpening implements A fixture form of apparatus is provided which performs in conjunction with a typical bench grinder to retain and maneuver implements having to be sharpend such as mower blades. The apparatus includes a base member upon which is mounted a forwardly dispose... | 06/15/1993 |
| 5127194 | Apparatus for sharpening the blade of a skate The present invention is directed to an apparatus for sharpening the blade of a skate which provides more precision that prior art sharpeners. The apparatus comprises a circular grindstone which can pivot from a work position to a rest or sharpening posit... | 07/07/1992 |
| 5048236 | Saw blade tooth grinder for saws A device for grinding saw blades, both hand saws and circular saws so that a predetermined tooth profile is obtained, utilizes a grinding head that moves in one plane and moves the saw in a second plane. The device comprises a saw blade mount, an indexing... | 09/17/1991 |
| 5018310 | Knife sharpener A grinding device (2) is inserted in the synthetic resin housing (1) of the knife sharpener, this grinding device consisting of a supporting unit (3) with two resiliently designed supporting arms (6, 7) for two grinding wheels (8, 9). In the installed con... | 05/28/1991 |
| 5009038 | Automatic chamfering machine An automatic chamfering machine for ceramic honeycomb structural bodies and the like workpieces is disclosed, and includes a clamping device by which a workpiece is clamped and caused to rotate in one direction. The movement of a grinder wheel with respec... | 04/23/1991 |
| 5009039 | Skate sharpening device An automatic skate sharpener comprises a skate sharpening mechanism inside a cover. A skate loading device is pivotally mounted in an opening in the protective cover, so that it can be pivoted between a loading position, in which the skate is on the outsi... | 04/23/1991 |
| 4984391 | Machine for forming woodworking tool A grinding machine for grinding a woodworking tool shown as knife to a predetermined shape includes two main tables. The upper table moves toward and away in a Y direction from the grinding wheel and a lower table that moves left and right in an perpendic... | 01/15/1991 |
| 4961288 | Apparatus for sharpening edge tools Apparatus for sharpening an edge tool having a linear cutting edge, such as a chisel, plane iron or gouge, comprises a rotary grindstone having a cylindrically curved surface mounted for rotation about an axis coincident with the axis of the cylinder, and... | 10/09/1990 |
| 4936053 | Lawn mower blade sharpener apparatus This invention relates to a lawn mower blade sharpener apparatus readily attachable to a bench grinder assembly having a rotating grinder wheel to sharpen an edge portion on a lawn mower blade. The lawn mower blade sharpener apparatus includes (1) a stati... | 06/26/1990 |
| 4630406 | Method of using an elliptical form to generate a perfect radius in an insulated electrical conductor stripping blade An improved blade for cutting and stripping insulation from insulated electrical conductors has a cutting edge with a circular cross-section when viewed in the direction parallel to the axis of the insulated conductor to be stripped instead of the ellipti... | 12/23/1986 |
| 4558541 | Ice skate sharpening method A machine for sharpening the blade of an ice skate has a vertically mounted, thin grinding wheel with a convex transverse cross-section corresponding to the concave transverse cross-section desired for the blade edge. Clamping plates on a cradle hold the ... | 12/17/1985 |
| 4528778 | Implement sharpening device An apparatus for holding a blade of an implement while sharpening an edge thereon with a rotating sharpening wheel. The blade is carried by a blade holder which is, in turn, supported on a vertically extending bracket. The angle that the blade holder is s... | 07/16/1985 |
| 4528777 | Knife sharpener A knife sharpening device having a grinding element adapted to be moved into the knife edge in a spiral path through a 180° traverse and reverse, simultaneously moving longitudinally throughout the length of the knife's edge. A blade stropping element ma... | 07/16/1985 |
| 4418499 | Cutter grinding machine A grinding machine for cutters used in wood working machines such as superfinishing wood planing machines. The cutter grinding machine comprises a cutter rest, to which a cutter to be ground is attached, and grinding wheels being adapted so that either of... | 12/06/1983 |
| 4392332 | Ice skate sharpener The invention comprises an improved ice skate grinding, sharpening and contouring machine. The machine includes pins mounted in movable blocks to accurately center an ice skate between the heel and sole struts in a movable holding fixture and alternate ec... | 07/12/1983 |
| 4265146 | Device for sharpening lawn mower blades A device for use with a portable electric drill having an abrasive wheel attached thereto for rotation thereby. The device includes a base for holding the drill in a substantially horizontal position and a clamp for holding a lawn mower blade. A rail is a... | 05/05/1981 |
