(12) United States Patent (10) Patent No.: US 8,915,766 B1 Kolchin (45) Date of Patent: Dec
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US008915766B1 (12) United States Patent (10) Patent No.: US 8,915,766 B1 Kolchin (45) Date of Patent: Dec. 23, 2014 (54) AUTOMATIC KNIFE SHARPENER ANDA 5,793,493 A 8, 1998 Lane METHOD FORTS USE 6,969,299 B1 1 1/2005 Papetti 2005/0072135 A1 4/2005 Kormann (71) Applicant: Dmitriy Kolchin, Orange, CA (US) 2011/0281503 A1*ck 11/2011 Knecht et al. ..................... 451/5 (72) Inventor: Dmitriy Kolchin, Orange, CA (US) FOREIGN PATENT DOCUMENTS - WO 2007 148878 A1 12/2007 (*) Notice: Subject to any disclaimer, the term of this WO 2009 129157 A1 10, 2009 patent is extended or adjusted under 35 WO 2012.159149 A1 11 2012 U.S.C. 154(b) by 0 days. * cited by examiner (21) Appl. No.: 14/284,903 Primary Examiner — Robert Rose (22) Filed: May 22, 2014 (74) Attorney, Agent, or Firm — Law Office of Ilya Libenzon (51) Int. Cl. B24B 49/10 (2006.01) (57) ABSTRACT :t t%t2 R A knife sharpener includes a knife holder in which a knife is ( .01) inserted so that an edge of the knife is exposed, at least one (52) U.S. Cl. edge sensor, configured to detect the edge of the knife, at least CPC. B.24B 3/54 (2013.01); B24B 49/10 (2013.01); one abrader, the at least one abrader having a sharpening B24B 49/12 2010) Surface angled to meet an edge of the knife at a sharpening USPC - - - - - - - - - - - grgrrr. 451/5: 451/45 angle of one side of the knife, a motive mechanism connected (58) Field of Classification Search to the holder and the at least one abrader, and a computing USPC ... 451/5, 6, 8, 9, 10, 45, 260, 261, 263,57 device in communication with the edge sensor and the motive See application file for complete search history. mechanism, and configured to cause the at least one abrader to traverse the edge of the knife using the motive mechanism, (56) References Cited in response to the at least one edge sensor. A method for knife U.S. PATENT DOCUMENTS sharpening involves directing the abrader to traverse the edge of the knife, responsive to input from an edge sensor. 4,176,396 A * 1 1/1979 Howatt ........................... TO2/34 4,843,767 A 7, 1989 Johnson 18 Claims, 7 Drawing Sheets Data Entry Devices 109 Communication Display Communication Interface 110 Infrastructure 108 Network Connection 111 Secondary Memory Database 112 HardDrive 105 Removable Storage Removable storage drive? Device interface 106 107 U.S. Patent Dec. 23, 2014 Sheet 1 of 7 US 8,915,766 B1 100 y Processor Data Entry Devices ( ) 101 109 Communication Display Communication Interface 110 Infrastructure 108 102 Network Connection Main Memory 111 () 103 Secondary Memory Database 104 112 Hard Drive 105 Removable Storage Removable storage drive? Device interface 106 107 FIG. 1 U.S. Patent Dec. 23, 2014 Sheet 2 of 7 US 8,915,766 B1 207 202 201 FIG. 2A U.S. Patent Dec. 23, 2014 Sheet 3 of 7 US 8,915,766 B1 200 see FIG. 2B U.S. Patent Dec. 23, 2014 Sheet 4 of 7 US 8,915,766 B1 U.S. Patent Dec. 23, 2014 Sheet 5 Of 7 US 8,915,766 B1 FIG. 2E U.S. Patent Dec. 23, 2014 Sheet 6 of 7 US 8,915,766 B1 2O3 see 202 FIG. 2G U.S. Patent Dec. 23, 2014 Sheet 7 Of 7 US 8,915,766 B1 3OO see Activating, by the Computing Device, the Motive Mechanism to Bring a First Abrader, of the at Least One Abrader, and the Knife toward Each Other 301 Receiving, by the Computing Device, from an Edge Sensor Connected to the Computing Device, an Indication that the First Abrader is in Contact with the Edge of the Knife 302 Directing, by the Computing Device, the Motive Mechanism to Cause the First Abrader to Traverse the Edge of the Knife 303 FIG. 3 US 8,915,766 B1 1. 2 AUTOMATIC KNIFE SHARPENER ANDA computing device, from an edge sensor connected to the METHOD FORTS USE computing device, an indication that the first sharpening disc is in contact with the edge of the knife, and directing, by the TECHNICAL FIELD computing device, the motive mechanism to cause the first abrader to traverse the edge of the knife. Embodiments disclosed herein relate generally to elec In a related embodiment, activating further involves main tronic knife sharpeners, and in particular to automated knife taining in memory accessible to the computing device a sharpening known orientation of the knife, maintaining in memory acces sible to the computing device a known orientation of the first BACKGROUND ART 10 abrader, and directing the motive mechanism to move the first abrader and knife toward one another along a path between Knives are perhaps the most ubiquitous simple tools in the the knife and the first abrader. In another embodiment, direct world. Practically all households have a battery of kitchen ing further involves obtaining, by the computing device, at knives for slicing and preparing food, jackknives or pen least one knife shape profile comprising an edge path, and knives for various odd jobs, and utility knives for opening 15 directing the motive mechanism to cause the at least one boxes and cutting twine. Hobbyists of various descriptions abrader to traverse the edge path of the at least one knife shape add a complement of hunting knives, skiving knives, knives profile. In a related embodiment, obtaining further involves for diving, fishing, camping, woodcarving, and various other capturing, with a sensor coupled to the computing device, an recreational activities. Many mechanized labor-saving image of the knife and detecting, using an edge detection devices. Such as food processors and lawnmowers, also con algorithm, the edge of the knife. In another related embodi tain edged components that can be classified as knives. What ment, obtaining further involves directing a contact sensor to evera knife is used for, its utility generally depends on main traverse the edge of the knife, receiving edge location infor taining a keen edge. Dull kitchen knives, for instance, bruise mation from the contact sensor responsive to the traversal, the food they are intended to cut, and can slip and cause injury. and determining, responsive to the location information, the Good steel and serration can hold friction at bay, but eventu 25 edge path. Another related embodiment further involves ally every kind of knife must be sharpened, or replaced. determining that the edge path does not follow the edge of the Sharpening with hand tools, however, can require more knife, correcting the edge path to follow the edge of the knife, time and patience than many people are willing to invest. and maintaining in memory accessible to the computing Power sharpeners have their own issues: if they are conve device, the corrected edge path. nient they tend to produce a Suboptimal edge, and if they are 30 In another embodiment, directing further involves receiv effective sharpeners they can also easily damage the knife ing, from the edge sensor, an indication that the first abrader blade, grinding it down or rounding its tip. Most automatic is no longer in contact with the edge of the knife, directing the sharpeners also lack versatility when dealing with the various motive mechanism to move the edge of the knife and the first forms of knife blades that exist and need sharpening. abrader towards each other, receiving, from the edge sensor, Therefore, there remains a need for an easy-to-use and 35 an indication that the first abrader is in contact with the edge efficient automated knife-sharpening system. of the knife, and directing the motive mechanism to stop moving the edge of the knife and first abrader towards each SUMMARY OF THE EMBODIMENTS other. In yet another embodiment, directing further involves receiving, from a contact edge sensor preceding the first A knife sharpener is disclosed having a knife holder in 40 abrader along the edge, an indication of a change in direction which a knife is inserted so that an edge of the knife is of the edge, and directing, by the computing device, the first exposed, at least one edge sensor, configured to detect the abrader to change direction in response to the received indi edge of the knife, at least one abrader, the at least one abrader cation. In still another embodiment, directing further includes having a sharpening Surface angled to meet an edge of the determining, by the computing device, a sharpening angle of knife at a sharpening angle of one side of the knife, a motive 45 the knife and directing, by the computing device, the knife mechanism connected to the holder and the at least one sharpener to adjust the angle of the first abrader with respect abrader, and a computing device in communication with the to the knife to match the determined sharpening angle. edge sensor and motive mechanism, and configured to cause Another embodiment involves determining, by the comput the at least one abrader to traverse the edge of the knife using ing device, a grind style of the knife and directing, by the the motive mechanism, in response to the at least one edge 50 computing device, the first abrader to grind the knife based on sensor. In an additional embodiment, the at least one edge the determination. A related embodiment involves selecting, sensor further includes a power source in electrical contact by the computing device, the first abrader from a plurality of with the knife blade and with the at least one sharpening abraders, based on the determination.