US20140038504A1 - Blade sharpening apparatus - Google Patents
Blade sharpening apparatus Download PDFInfo
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- US20140038504A1 US20140038504A1 US13/746,511 US201313746511A US2014038504A1 US 20140038504 A1 US20140038504 A1 US 20140038504A1 US 201313746511 A US201313746511 A US 201313746511A US 2014038504 A1 US2014038504 A1 US 2014038504A1
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- Prior art keywords
- blade
- sharpening
- edge
- base member
- members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
- B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
- B24D15/08—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors
- B24D15/081—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact
Definitions
- the present disclosure relates generally to an apparatus for unrolling and sharpening a cutting edge on a blade that has its edges rolled or dulled. More specifically, the disclosure is directed toward an improvement including an edge sharpening device.
- U.S. Pat. No. 6,866,569 owned by the applicant herein describes an apparatus for straightening and sharpening a cutting edge of a blade.
- U.S. Pat. No. 5,478,272 (“the '272 patent”), also owned by applicant herein, describes an apparatus for sharpening a cutting edge on a blade.
- exposed biasing means such as counterweights, lever arms, springs and the like, are prone to collect food particles and other debris during use.
- These sharpening devices are often used in food processing plants where the blades to be sharpened are full of meat particles. Where the spring is not shielded from debris that may accumulate during use, this condition can cause related problems of contamination and disease.
- a blade sharpening apparatus comprises a base member including a front face and a rear face and a blade sharpening member attached to the base member and being adapted to straighten a blade of a knife.
- the apparatus further includes an edge sharpener disposed within the base member and adapted to sharpen an edge of a knife.
- a blade sharpening apparatus includes a base member including a front face and a rear face and a slot defined in said base member adapted to receive and guide a blade to be sharpened.
- the apparatus further includes a blade sharpening member attached to the base member and being adapted for operation upon guidance of the blade through the slot and an edge sharpener disposed adjacent an end of the slot or an edge of the base member and adapted to sharpen an edge of a knife.
- a blade sharpening apparatus includes a base member including a front face and a rear face and a slot defined in said base member adapted to receive and guide a blade to be sharpened.
- the apparatus further includes a blade sharpening member attached to the base member and being adapted for operation upon guidance of the blade through the slot and a cavity disposed within the rear face of the base member adjacent the slot or an edge of the base member.
- An edge sharpener is disposed within the cavity and adapted to sharpen an edge of a knife, the edge sharpener including first and second opposing sharpening members forming a V-shaped channel and an attachment mechanism for retaining the edge sharpener within the cavity.
- FIG. 1 is a front view of the preferred embodiment of the blade sharpening apparatus
- FIG. 2 is a rear view of the embodiment of FIG. 1 illustrating oppositely shaped rear spring caps
- FIG. 3 shows a rear spring cap as illustrated in FIG. 2 accommodating a biasing member
- FIG. 4 is a perspective view illustrating a second embodiment of the blade sharpening apparatus
- FIG. 5 is a front view illustrating the blade sharpening apparatus of FIG. 4 ;
- FIG. 6 is a side view, taken along lines 6 - 6 of FIG. 5 ;
- FIG. 7 is a front view illustrating a blade sharpening apparatus of another embodiment
- FIG. 8 is a side view, taken along lines 8 - 8 of FIG. 7 ;
- FIG. 9 is a front view illustrating a blade sharpening apparatus of another embodiment.
- FIG. 10 is a side view, taken along the lines 10 - 10 of FIG. 9 ;
- FIG. 11 is a front view illustrating a further embodiment of a blade sharpening apparatus including three edge sharpeners;
- FIG. 12 a rear view of the embodiment of FIG. 11 illustrating attachment of the three edge sharpeners to the blade sharpener;
- FIG. 13 is a top isometric view depicting a first embodiment of an edge sharpener including a rod holder for holding ceramic rods for sharpening an edge of a knife or other implement;
- FIG. 14 is a front view of the edge sharpener of FIG. 13 ;
- FIG. 15 is a rear view of the edge sharpener of FIG. 13 ;
- FIG. 16 is a side view of the edge sharpener of FIG. 13 ;
- FIG. 17 is a top view of the edge sharpener of FIG. 13 ;
- FIG. 18 is a top isometric view of a second embodiment of an edge sharpener including two carbide blades
- FIG. 19 is a front view of the edge sharpener of FIG. 18 ;
- FIG. 20 is a bottom view of the edge sharpener of FIG. 18 ;
- FIG. 21 is a side view of the edge sharpener of FIG. 18 ;
- FIG. 22 is a view along the line of sight 22 of FIG. 19 ;
- FIG. 23 is a view along the line of sight 23 of FIG. 19 ;
- FIG. 24 is a top isometric view of a third embodiment of an edge sharpener including two carbide blades
- FIG. 25 is a front view of the edge sharpener of FIG. 24 ;
- FIG. 26 is a bottom view of the edge sharpener of FIG. 24 ;
- FIG. 27 is a view along the line of sight 27 of FIG. 24 ;
- FIG. 28 is a view along the line of sight 28 of FIG. 24 ;
- FIG. 29 is a front view illustrating a further embodiment of a blade sharpening apparatus including three edge sharpeners and a handle;
- FIG. 30 is a rear view of the blade sharpening apparatus of FIG. 24 .
- the present disclosure is directed to a blade sharpening apparatus. While the present disclosure may be embodied in many different forms, several specific embodiments are discussed herein with the understanding that the present disclosure is to be considered only as an exemplification of the principles of the blade sharpening apparatus disclosed herein, and it is not intended to be limited to the embodiments illustrated.
- FIG. 1 a front view illustration of a illustrative blade sharpening apparatus of the present disclosure generally designated as 10 is shown.
- the blade sharpener 10 generally includes a base member 12 having a front face 14 .
- a slot 18 is formed in the base member for receiving and guiding a blade during sharpening.
- An entrance 19 allows the blade to be inserted through the slot 18 .
- the base member 12 also includes a pair of apertures 20 and 22 for receiving and substantially entirely enclosing a pair of biasing members 24 and 26 so as to protect them from debris and other particles during use.
- the pair of apertures go all the way through the base member 12 .
- first, second and third sharpening members 28 , 30 and 32 (the third sharpening member 32 is positioned behind the second sharpening member 30 , which is more clearly illustrated in FIG. 4 ), curved rods, which are used to sharpen the cutting edge of a knife blade or other cutting tools such as a scissors, shears or hedge trimmers.
- the sharpening members 28 , 30 and 32 as rods, will unroll the tiny microscopic teeth on the edge of the blade when the blade is drawn across the straight ends of the rods using light pressure. After straightening the edge of the blade, the blade is drawn through the curved rods with light pressure to sharpen the blade. While the rods 28 , 30 , and 32 are shown as being curved, one or more of the rods 28 , 30 , and 32 may be straight and/or have any other shape.
- the base member 12 is provided with stop members 34 , 36 and 38 , preferably pins with knobs on the distal ends, which are configured to control and limit the rotation of the sharpening members 28 , 30 , and 32 between a first “at rest” position, as illustrated by the solid lines in FIG. 1 , and a second position as illustrated by the dotted lines in FIG. 1 .
- Stop members 34 , 36 and 38 preferably pass completely through the base member 12 for easier removal and reassembly.
- the stop members 34 , 36 , and 38 may have a shoulder so they are flush with the front face 14 of the base member 12 .
- the base member 12 is generally formed of a hard durable plastic, such as polypropylene, that is easily cleaned by water and/or a cleansing solution.
- the base member 12 can be formed of any desired shape.
- Rotatable posts 44 and 46 extend outwardly from the front face 14 of the base member and are rotatable about a central axis of the apertures 20 and 22 respectively. Sharpening rods 30 and 32 are secured to post 46 for rotation therewith and sharpening rod 28 is secured to post 44 .
- the post 44 includes a stem 52 extending from one end. The same stem is present on post 46 , which is identical in structure to post 44 .
- the blade sharpener 10 includes top guide rails 48 and 50 so as to allow a blade to be easily inserted at the upper portion of the slot 18 .
- the guide rails 48 and 50 may be formed of metal and angled toward the entrance 19 of the slot 18 to guide a blade into the slot 18 without the blade contacting the base member 12 .
- the guide rails 48 and 50 can be offset with one higher than the other as shown in FIG. 7 to help guide the blade into the slot 18 .
- the gap between guide rails 48 may be slightly narrower than the slot 18 .
- the sharpening members 28 , 30 and 32 are manufactured from suitable material to sharpen a blade, such as, 440 C stainless steel hardened to 59-60 Rockwell C Standard by heat treating or the like.
- the sharpening members 28 , 30 and 32 are illustrated as curved in shape but can also be straight as shown in the embodiments of FIGS. 7-9 .
- the embodiments of FIGS. 1-6 illustrate three sharpening rods, but either of rods 30 or 32 could be eliminated resulting in an apparatus having only two sharpening rods, one extending across the slot 18 from each side thereof. Also, embodiments can be constructed having more than three sharpening rods if desired.
- the rods 30 and 32 are mounted parallel to each other but are spaced apart to define a gap therebetween through which the sharpening rod 28 extends.
- the stop members 34 , 36 and 38 can be manufactured from steel, plastic, or other suitable material as is known in the art to be durable and to withstand the rigors of use.
- the stop members 34 , 36 and 38 may be pins that have a shoulder that will be flush when the pins are pressed into the base. Since the stop members go all the way though the base member 12 , the stop members 34 , 36 and 38 can be more easily removed and reassembled if the stop members 34 , 36 and 38 become worn out.
- the biasing members 24 and 26 can be made from rotary coil torsion springs having two free ends.
- each torsion spring provides approximately 0.51-0.55 pound-inches of torque to the rotatable posts 44 , 46 and the sharpening members 28 , and 32 respectively connected thereto.
- the torsion spring may be selected to provide such biasing torque although other tensions and torque specifications are contemplated depending on the desired application.
- Other resilient biasing mechanisms capable of accomplishing the same result could be substituted for the torsion spring mechanism.
- the base member 12 further includes mounting holes 64 so that the blade sharpening apparatus 10 can be secured to a work station, countertop, machine, assembly line or the like. Bolts can be inserted through mounting holes 64 and mounting surface, and then fastened with nuts and washers as appropriate. Alternately, the blade sharpener 10 can be mounted on the top of a work table or cutting board using grooves 65 in the bottom lip of base member 12 .
- the posts 44 and 46 can be formed from DELRIN plastic or other suitable material as will be apparent to one skilled in the art.
- the posts 44 and 46 both include a front cover portion 68 in the form of a skirt that overlies and seals the apertures 20 and 22 on the front face 14 of the base member 12 .
- the front cover portion 68 is rotatably received in a recess 70 ( FIG. 6 ) formed within the apertures 20 and 22 .
- FIG. 2 shows a rear face 16 of the illustrative embodiment of FIG. 1 with oppositely shaped rear spring caps 97 and 98 on each side of the slot 18 .
- the present disclosure includes two oppositely shaped rear spring caps 97 and 98 that fit into complementary shapes 99 on the rear face 16 .
- the caps 97 and 98 can be D-shaped or any other shape so caps 97 and 98 can only be installed in one position each for proper alignment of the rotatable posts 44 and 46 (or 72 and 74 described later with regard to FIGS. 7 and 8 ) and the sharpening members.
- the caps 97 and 98 can be marked with an indicium that corresponds to an indicium on the rear face 16 , such as “A” and “B” as shown in FIG. 2 .
- the indicium on at least one rear spring cap corresponds to the indicium on an adjacent portion of the rear face. If the spring caps 97 and 98 are put into the wrong side, it is impossible to assemble the blade sharpener 10 because the flanges will not fit into the base.
- the caps 97 and 98 seal the apertures (i.e., 20 and 22 ) on the rear face 16 of the base member 12 similar to the rear cover portions 58 discussed below and illustrated in FIG. 6 .
- the caps 97 and 98 include central bore 62 and a recess 63 , which receives a stem 52 .
- the term “rear cover portions” is meant to define caps 97 and 98 .
- a screw 60 passes through the central bore 62 and is secured into the end of stem 52 , thereby sealing the apertures 20 and 22 on the rear face 16 thereof and securing the rotatable posts 44 , 46 , 72 , or 74 in place. In this manner, the posts are secured to the base member 12 and are able to rotate with their associated sharpening members.
- a cap 97 accommodates a biasing member 24 shielding it from contaminants during use.
- the side shown in FIG. 3 would face inward toward the rear face 16 .
- the biasing member 24 may be completely inserted into a recess in the cap 97 and, as a torsion spring as shown, is attached at one end 101 to the cap 97 and coiling in a counterclockwise direction.
- the stem 52 would have at least two flattened sides to coordinate with the second end 102 of the biasing member 24 , which is shown as three sides of a square.
- the “B” cap 98 would be of a similar construction, but opposite with the coil rotating in the clockwise direction.
- a blade with rolled edges is positioned at the top of slot 18 and passed downwardly to the bottom of the slot 18 through the sharpening members 28 , 30 , and 32 .
- the blade is pulled straight down until the sharpening members 28 , 30 and 32 contact stop member 36 .
- the blade is drawn across the sharpening members 28 , 30 , and 32 until the tip of the blade clears the sharpening members 28 , 30 , and 32 and the sharpening members 28 , 30 , and 32 spring back to the stop members 34 and 38 respectively. This motion unrolls curled edges of the blade.
- the blade may also be sharpened.
- the handle or hilt end of the blade is positioned close to the front face 14 , while the pointed end of the blade extends well beyond the rear face 16 , depending on the length of the blade.
- the blade is ideally pulled about three-quarters of the way down the slot 18 through the sharpening members 28 , 30 , and 32 in one continuous motion.
- the blade is drawn from the top of the slot 18 to the bottom, it is also drawn horizontally through the slot 18 so the entire length of the blade is sharpened from the hilt to the point.
- the sharpening members 28 , 30 , and 32 contact and sharpen the cutting edge of the blade.
- the sharpening members 28 , 30 , and 32 rotate from the first position as shown in full lines in FIGS. 1 and 5 to the second position shown in dotted lines when the blade passes from top to bottom.
- the sharpening members 30 and 32 extend downwardly and across slot 18 from right to left, as shown in FIGS. 1 and 5 , while the blade 28 extends downwardly and across slot 18 from left to right.
- the blades intersect in a V-shape to lie across the slot.
- the blade sharpener 10 generally includes a base member 12 having a front face 14 , a rear face 16 , and a slot 18 formed in the base member for receiving and guiding a blade during sharpening.
- the base member 12 also includes a pair of apertures 20 and 22 for receiving and substantially entirely enclosing a pair of biasing members 124 and 126 so as to protect them from debris and other particles during use. The pair of apertures go all the way though the base member 12 .
- the blade sharpener 10 of FIGS. 4-6 includes first, second and third sharpening members 28 , 30 , and 32 as discussed above.
- the base member 12 is provided with stop members 34 , 36 , and 38 to control and limit the rotation of the sharpening members 28 , 30 , and 32 between a first “at rest” position, as illustrated by the solid lines in FIG. 5 , and a second position as illustrated by the dotted lines in FIG. 5 .
- the stop members 34 , 36 and 38 may pass completely through the base member 12 for easier removal and reassembly.
- the stop members 34 , 36 , and 38 may have a shoulder so they are flush with the front face 14 of the base member 12 .
- Rotatable posts 44 and 46 extend outwardly from the front face 14 of the base member and are rotatable about a central axis of the apertures 20 and 22 respectively. Sharpening rods 30 and 32 are secured to post 46 for rotation therewith and sharpening rod 28 is secured to post 44 .
- the blade sharpener 10 includes top guide rails 48 and 50 so as to allow a blade to be easily inserted at the upper portion of the slot 18 .
- the guide rails 48 and 50 may be angled toward the slot 18 to guide a blade into the slot 18 without the blade contacting the base member 12 .
- the gap between guide rails 48 may be slightly narrower than the slot 18 .
- FIG. 6 illustrates how the biasing member 124 , or spring, is entirely enclosed within the base member 12 , which prevents the accumulation of debris, particles and other contaminants, and which advantageously makes the present disclosure ideally suitable for industrial use.
- the post 44 includes a stem 52 extending from one end.
- the same stem is present on post 46 , which is identical in structure to post 44 .
- Disposed within the aperture 20 is a flange 54 configured so that the spring 124 is positioned concentrically over the stem 52 .
- the spring 124 has a pair of free ends, one of which is fastened to the post 44 , and the other of which is connected to the flange 54 , by suitable fasteners 56 A and 56 B respectively.
- the blade sharpening apparatus 10 further includes rear cover portions 58 for sealing the apertures 20 and 22 on the rear face of the base member 12 .
- FIG. 6 illustrates one such cover portion, which in this case each have an identical configuration.
- the cover portions 58 are located on the opposite side of the posts 44 and 46 .
- the rear cover portions 58 include a central bore 62 and a recess 63 , which receives the stem 52 .
- a screw 60 passes through the central bore 62 and is secured into the end of stem 52 , thereby sealing the apertures 20 and 22 on the rear face thereof and securing the rotatable posts 44 , 46 in place as previously discussed
- FIGS. 4-6 The operation of the blade sharpening apparatus embodiment of FIGS. 4-6 is substantially the same as shown and described in FIGS. 1-3 for the illustrative embodiment.
- FIGS. 7 and 8 illustrate another embodiment of a blade sharpening apparatus 70 incorporating the features of the present disclosure.
- the blade sharpener 70 generally includes a base member 12 A having a slot 18 A with a pair of apertures 20 A and 22 A located at the lower portion of slot 18 A.
- Sharpening members 28 A and 30 A are secured in rotatable posts 72 and 74 that extend through apertures 20 A and 22 A.
- the sharpening members 28 A and 30 A are straight and adapted to be secured in the posts 72 and 74 with segments 78 and 80 extending therefrom.
- the segments 78 and 80 abut stop members 82 and 84 when the apparatus 70 is in the “at rest” position illustrated in full lines in FIG. 7 .
- Each post 72 , 74 includes a threaded portion 86 , and a rear nut 88 that secures each post within the respective aperture 20 A or 22 A.
- a biasing member 85 illustrated as a coil spring, is concentrically mounted over each post 72 , 74 .
- the coil spring 85 is shown in FIG. 8 as having one free end constrained by a wall of the apertures 20 and 22 with the other end connected to the post 72 such that the sharpening members are biased to assume a first position shown in full lines in FIG. 7 .
- the resilient biasing member 85 is substantially entirely enclosed within respective apertures 20 A and 22 A by the nut 88 on the rear face and the threaded portion 86 on the front face.
- a skirted cover portion (not shown) may be placed on the front face 14 A similar to the front cover portion 68 illustrated in FIG. 4 .
- the major distinction between the embodiment shown in FIGS. 4-7 and the embodiment of FIGS. 7 and 8 has to do with the orientation of the sharpening members.
- the sharpening members are mounted toward the top of the slot and extend downwardly across the slot.
- the sharpening members are mounted toward the bottom of the slot and extend upwardly across the slot.
- the biasing members of FIGS. 7 and 8 position the sharpening members 28 A and 30 A in the full line position as shown in FIG. 7 .
- the blade is inserted into the upper portion of slot 18 A and, by a downward and simultaneous horizontal movement, the sharpening members 28 A and 30 A are rotated by the motion of the blade to the second position, shown in phantom in FIG. 4 , as the blade is sharpened.
- the resilient biasing members 85 rotate the posts 72 and 74 to return the sharpening members 28 A and 30 A to the first position.
- the guide rails 48 and 50 are offset with one higher than the other to help guide the blade into the slot 18 .
- One of top guide rails extends farther from the base member than the other to assist the insertion of a blade.
- the guide rails 48 and 50 extend well above the base member to provide a potential hanging means for when the apparatus is not in use.
- the blade sharpener 90 includes a base member 12 B having a slot 18 B disposed at a mid-portion thereof.
- the apertures 20 B and 2 B are located adjacent the slot 18 B at an upper end thereof.
- the sharpening members 28 B and 30 B are formed from straight steel rods.
- This embodiment shows semicircular top guide rails 48 .
- a pair of rotatable posts 92 is provided, with a post extending through each aperture 20 B, 22 B. Each post is threaded at both ends with a nut 93 secured over the post at the rear thereof, as illustrated in FIG. 7 .
- a resilient biasing member in the form of a torsion spring 94 is shown mounted within the aperture 20 B overlying and concentric with the post 92 . The spring 94 is connected at one end to the post 92 and at the other end to the base member. An elbow 96 connects the post 92 to sharpening member 28 B.
- FIGS. 9 and 10 The operation of the blade sharpening apparatus of FIGS. 9 and 10 is substantially the same as that shown and described in FIGS. 1-6 .
- FIGS. 11 and 12 A further embodiment of a blade sharpening apparatus 10 is shown in FIGS. 11 and 12 .
- the components of the apparatus 10 that are similar to the previous embodiments are numbered similarly.
- the apparatus 10 of FIGS. 11 and 12 further includes one or more edge sharpeners 200 .
- the embodiment of FIG. 11 includes three edge sharpeners 200 .
- generally rectangular cavities 202 are formed within the rear face 16 of the edge sharpening apparatus 10 .
- the edge sharpeners 200 are disposed within the cavities and may be retained by screws 204 .
- an adhesive, a bolt and nut, a friction fit, an interference fit, material welding, or any other retention mechanism known in the art may be utilized.
- An edge sharpener 200 may be placed at the bottom of slot 18 .
- Guide rails 48 , 50 similar to those illustrated in connection with any of FIGS. 1 , 2 , 4 , 5 , 7 , and 9 may be utilized at or near the opening s of the edge sharpeners 200 on slot 18 of FIGS. 11 and 12 .
- the edge sharpener 200 generally includes a rod holder 210 and two rods 212 a , 212 b ( FIG. 14 ).
- the rod holder 210 may have a U-shaped body 214 forming a U-shaped channel 215 with first and second opposing walls 216 , 218 joined by a connecting portion 220 that may have a height that is slightly greater than half a height of the walls 216 , 218 .
- the connecting portion 220 extends between a first end 222 and a second end 224 of the rod holder 210 .
- the second wall 218 and the connecting portion 220 are truncated at the first end 222 of the rod holder 210 to form an angled wall 230 .
- the angled wall 230 is angled in two manners, in particular, the angled wall 230 is disposed at a first angle A 1 that may be between about 2 and about 45 degrees, preferably between about 12 and about 28 degrees, and more preferably about 17.5 degrees with respect to a longitudinal axis 232 of the rod holder 210 and may be disposed at a second angle A 2 that may be between about 0 and about 45 degrees, preferably between about 10 and about 30 degrees, and more preferably about 20 degrees with respect to a lateral axis 234 of the rod holder 210 .
- the rod holder 210 further includes a first angled channel 240 having a first portion 242 extending through the first wall 216 and a second portion 244 terminating in the connecting portion 220 below the U-shaped channel 215 .
- the rod 212 a is disposed within the channel 240 with a first end 250 of the rod 212 a within the first portion 242 , a second end 252 of the rod 212 a within the second portion 244 , and a central portion 254 of the rod 212 a extending into the U-shaped channel 215 .
- FIG. 14 the rod 212 a is disposed within the channel 240 with a first end 250 of the rod 212 a within the first portion 242 , a second end 252 of the rod 212 a within the second portion 244 , and a central portion 254 of the rod 212 a extending into the U-shaped channel 215 .
- the rod holder 210 includes a second angled channel 260 having a first portion 262 extending through the second wall 218 and a second portion 264 terminating in the connecting portion 220 below the U-shaped channel 215 .
- the rod 212 b is disposed within the channel 260 with a first end 270 of the rod 212 b within the first portion 262 of the channel 260 , a second end 272 within the second portion 264 of the channel 260 , and a central portion 274 of the rod 212 b extending into the U-shaped channel 215 .
- each of the rods 212 a , 212 b may be inserted into the rod holder 210 through corresponding apertures 278 a , 278 b and retained within the respective channels 240 , 260 by adhesive, a friction fit, an interference fit, or any other retention mechanism known in the art. Additionally, the rods 212 a , 212 b may be trimmed, shaved, or of such a shape that the rods 212 a , 212 b do not extend out of the rod holder 210 beyond an upper surface 280 of the rod holder 210 .
- Each of the channels 240 , 260 may be disposed at an angle A 3 , A 5 that may be the same or different and may each be between about 2 and about 45 degrees, preferably between about 12 and about 28 degrees, and more preferably about 17.5 degrees with respect to the longitudinal axis 232 .
- An angle A 4 which may be between about 4 and about 90 degrees, preferably between about 4 and about 90 degrees, and more preferably about 35 degrees, may therefore be formed by the intersection of the rods 212 a , 212 b , wherein exposed edges 282 a , 282 b and an intersection 284 of the rods 212 a , 212 b form an edge sharpening tool. While the angles A 3 , A 5 are both shown as being the same, the angles A 3 , A 5 may alternatively be different and, in such instance, the angle A 4 would therefore be asymmetrical with respect to the longitudinal axis 232 .
- a generally cylindrical bore 300 may extend through the connecting portion 220 .
- the bore 300 includes a first section 302 disposed through the second end 224 of the rod holder 210 and a second section 304 disposed through the first end 222 of the rod holder 210 .
- the second section 304 has a side wall with threading that cooperates with threads on a screw and the first section 302 has a greater diameter than the first section 304 .
- An end of screw 306 may be inserted and screwed into the second section 304 to attach the rod holder 210 within the cavities 202 of the blade sharpening apparatus 10 . As seen in FIG.
- the cavities 202 may also include threaded bores aligned with the second section 304 of the bore 300 such that, when the screw 306 is threaded into the second section 304 of the bore 300 , threading continues into the threaded bore within the blade sharpening apparatus 10 to attach the rod holder 10 . Threading continues until a lower edge 308 of a head 310 of the screw 306 abuts a surface 312 formed between the first and second sections 302 , 304 of the bore 300 . While one specific embodiment for attachment of the rod holder 210 to the blade sharpening apparatus 10 is described and shown, it should be understood by one skilled in the art that any attachment mechanism known in the art may optionally be utilized and/or variations of the attachment mechanism shown in FIG. 16 are possible.
- the rods 212 a , 212 b of the edge sharpener 200 of FIGS. 12-17 may be made of a ceramic material, for example, a nonporous zirconia or alumina ceramic, or an equivalent ceramic material.
- the rods 212 a , 212 b may be made of any other material that would allow sharpening of an edge of a knife or cutting instrument having a cutting blade.
- FIGS. 18-23 A second embodiment of an edge sharpener 400 is depicted in FIGS. 18-23 .
- the edge sharpener 400 comprises a carbide insert, for example a nickel-based carbide, having two carbide blades 404 a , 404 b .
- the sharpener 400 may be a unitary or one-piece construction.
- Each of the blades 404 a , 404 b includes a top wall 406 a , 406 b , a bottom wall 408 a , 408 b , and an outer side wall 410 a , 410 b extending between respective top walls 406 a , 406 b and bottom walls 408 a , 408 b .
- the side walls 410 a , 410 b are generally parallel and, with the top and bottom walls 406 , 406 b , 408 a , 408 b , form a generally rectangular boundary of the edge sharpener 400 .
- the bottom walls 408 a , 408 b have widths that are substantially the same and slightly less than an overall width of the sharpener 40 and the top walls 406 a , 406 a have widths that are less than half the width of the bottom walls 408 a , 408 b .
- Angled side walls 412 a , 412 b extend between the top walls 406 a , 406 b and the bottom walls 408 a , 408 b to form a V-shaped cavity 414 between the angled side walls 412 a , 412 b.
- the angled side wall 412 a may be disposed at an angle A 6 that may be between about 2 and about 45 degrees, preferably between about 12 and about 28 degrees, and more preferably about 17.5 degrees respect to a longitudinal axis 420 of the edge sharpener 400 . Further, the angled side wall 412 a may be generally parallel to a lateral axis 422 of the edge sharpener 400 (and therefore at an angle A 7 of about 90 degrees with respect to a front surface 424 of the blade 404 a ).
- An outermost edge 426 of the angled side wall 412 b may be disposed at an angle A 8 that may be between about 2 and about 45 degrees, preferably between about 12 and about 28 degrees, and more preferably about 17.5 degrees with respect to the longitudinal axis 420 of the edge sharpener 400 and may be disposed at an angle A 9 that may be between about 0 and about 45 degrees, preferably between about 10 and about 30 degrees, and more preferably about 20 degrees with respect the lateral axis 422 (and therefore at an angle A 10 that may be between about 45 and about 90 degrees, preferably between about 60 and about 80 degrees, and more preferably 70 degrees with respect to a front face 427 of the blade 404 b ).
- the side wall 412 b is angled away from the other blade 404 a .
- the side walls 412 a , 412 b and an intersection 429 of the sidewalls 412 a , 412 b form an edge sharpening tool.
- the edge sharpener 400 may include a bore 430 for insertion of a screw and attachment to the blade sharpening apparatus 10 .
- FIGS. 25-28 A further embodiment of an edge sharpener 400 similar to that of FIGS. 18-23 is depicted in FIGS. 25-28 .
- the side wall 412 a is also angled with respect to the lateral axis 422 .
- the side wall 412 a may be angled inwardly toward the blade 404 b at an angle A 11 that may be between about 0 and about 45 degrees, preferably between about 10 and about 30 degrees, and more preferably about 20 degrees with respect to the lateral axis 422 (and therefore at an angle A 12 that may be between about 45 and about 90 degrees, preferably between about 60 and about 80 degrees, and more preferably about 70 degrees with respect to the front surface 424 of the blade 404 a ).
- a further embodiment of a blade sharpening apparatus 10 as seen in FIGS. 29 and 30 is identical to the apparatus of FIGS. 12 and 13 except that the apparatus 10 of FIGS. 29 and 30 includes a handle 500 .
- the handle 500 includes a first generally horizontal portion 502 extending outwardly from the blade sharpener 10 and a second generally vertical portion 504 extending downwardly and away from the horizontal portion 502 .
- the vertical portion 504 is generally parallel to and spaced forwardly from the blade sharpener 10 so that the horizontal portion 502 can be placed onto a surface for support while a user holds the vertical portion 504 .
- a shield 506 extends outwardly from the handle 500 opposite the horizontal portion 502 to protect a user's hand from particles that might migrate from the knife during a straightening or sharpening operation.
- the edge sharpeners 200 , 400 may be positioned along an edge 320 of the blade sharpening apparatus 10 or at an end 322 of the slot 18 . In one embodiment, if one or more edge sharpeners 200 , 400 are positioned along an edge 320 of the apparatus 10 , a channel 324 is formed in the edge 320 such that outwardly extending portions 326 are formed beyond the edge 320 .
- the cavity 202 is disposed immediately below the channel 324 such that the rod holder 210 with rods 212 a , 212 b installed is inserted into the cavity (and attached to the apparatus 10 ) with the center portions 254 , 274 of the rods 212 a , 212 h , respectively, extending into the channel 324 .
- the outwardly extending portions 326 cover the walls 216 , 218 of the rod holder 210 and the channel 324 and the outwardly extending portions 326 form a guiding structure for the blade of a knife.
- a user may draw a knife through the rods 212 a , 212 b or the blades 404 a , 404 b of the edge sharpener 200 , 400 one or more times to achieve a desired edge sharpness for the knife.
- Ceramic and carbide have the ability to remove edge material, thereby transforming a blunt edge to a sharp edge.
- the addition of one or more edge sharpeners 200 , 400 to the sharpening members 28 , 30 , and 32 of the blade sharpening apparatuses 10 of FIGS. 12 , 13 , 29 , and 30 allows a user to straighten and sharpen a knife blade in a single device, which saves time. With the apparatus 10 , a user does not have to stop what they are doing to have their knife sharpened or retrieve a new knife.
- edge sharpeners 200 , 400 may be utilized at the end 322 of the slot 18 or positioned along the edge 320 of the blade sharpening apparatus 10 .
- the edge sharpeners 200 may have different dimensions, for example, for different sized or shaped knives.
- the rods 212 a , 212 b or blades 404 a , 404 b may have different coarsenesses.
- the rods 212 a , 212 b or the blades 404 a , 404 b of a first sharpener 200 , 400 may have a rough coarseness
- the rods 212 a , 212 b or the blades 404 a , 404 b of a second sharpener 200 , 400 may have a medium coarseness
- the rods 212 a , 212 b or the blades 404 a , 404 b of a third sharpener 200 , 400 may have a fine coarseness.
- the edge sharpeners 200 , 400 may be utilized with any of the blade sharpening apparatuses 10 disclosed herein. If multiple edge sharpeners 200 , 400 are utilized within a blade sharpening apparatus 200 , 400 , the edges sharpeners 200 , 400 need not be the same. In particular, any combination of ceramic and/or carbide blade sharpeners 200 , 400 may be utilized.
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- Engineering & Computer Science (AREA)
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
A blade sharpening apparatus includes a base member including a front face and a rear face and a blade sharpening member attached to the base member and being adapted to straighten a blade of a knife. The blade sharpening apparatus further includes an edge sharpener disposed within the base member and adapted to sharpen an edge of a knife.
Description
- This application claims the benefit of U.S. Provisional Patent Application No. 61/589,579 filed on Jan. 23, 2012, and entitled “Blade Sharpening Apparatus,” the disclosure of which is incorporated herein in its entirety.
- 1. Field of the Disclosure
- The present disclosure relates generally to an apparatus for unrolling and sharpening a cutting edge on a blade that has its edges rolled or dulled. More specifically, the disclosure is directed toward an improvement including an edge sharpening device.
- From time to time it becomes necessary to straighten, realign, and/or sharpen the microscopic edge of a cutting tool such as a knife. During use, the edge of a blade becomes rolled or turned from direct contact with hard objects. It is important to maintain a uniform pressure and a proper even edge angle when sharpening a cutting edge. Previous sharpening devices have involved complex implements that commonly remove material from the cutting edge. Additionally, many of the previous devices are designed for use either only by a right-handed or left-handed person while sharpening one side of the edge at a time, not both. The present disclosure relates to a sharpener having a substantially enclosed versatile biasing assembly that resists contamination during use and provides for outstanding cleaning.
- 2. Description of the Background
- U.S. Pat. No. 6,866,569 owned by the applicant herein describes an apparatus for straightening and sharpening a cutting edge of a blade. In addition, U.S. Pat. No. 5,478,272 (“the '272 patent”), also owned by applicant herein, describes an apparatus for sharpening a cutting edge on a blade.
- Earlier devices for sharpening blades fall into three broad categories: (a) devices having sharpening elements in permanent fixed relationship such as that disclosed in U.S. Pat. Nos. 578,440; 1,851,520; 1,909,743; 2,767,530 and 5,163,251; (b) devices having sharpening elements in movable relationship to each other with fully exposed biasing assemblies such as that disclosed in U.S. Pat. No. 4,934,110; and (c) devices having sharpening elements in movable relationship to each other with biasing assemblies not shielded from debris such as that disclosed in U.S. Pat. Nos. 1,041,631; 1,570,083; 2,124,646; 2,885,836; 4,550,632; and 4,624,079 as well as Patent Nos. GB 293,785 and GB 517,242.
- There are problems and limitations with all of these earlier devices. Devices having sharpening elements in fixed relationship to each other are relatively inefficient, needing considerably more resistance when passing a blade between the elements in order to sharpen the blade and may not provide optimal sharpening of the blade. These arrangements often remove perceptible metal fragments from the blade, which shortens the useful blade life and is undesirable for contamination reasons.
- In movable element arrangements, exposed biasing means, such as counterweights, lever arms, springs and the like, are prone to collect food particles and other debris during use. These sharpening devices are often used in food processing plants where the blades to be sharpened are full of meat particles. Where the spring is not shielded from debris that may accumulate during use, this condition can cause related problems of contamination and disease.
- In certain food industries, governmental authorities regulate and inspect the processing of food for sale to consumers. While many sharpening devices produce a sharp blade, these prior devices have disadvantages of exposed parts or configurations that collect debris and contribute to the problems of contamination and disease. Additionally, cleaning the exposed parts of known devices is costly as these require specific attention to the meshed windings of springs and counterweights and the like. Cleaning may require disassembly of the housing in order to clean the apparatus and remove the debris. Sometimes when an operator is using prior art devices, the operator may be of the misconception, in not seeing the debris that is collecting, that all is well and the apparatus does not need cleaning, which in fact is not the case. Thus, there is a need for a blade sharpening apparatus of the present disclosure that eliminates operator error due to unseen contamination, reduces cleaning and maintenance costs, eliminates contamination thereof, and provides for unrolling and sharpening of blades.
- According to one illustrative embodiment, a blade sharpening apparatus comprises a base member including a front face and a rear face and a blade sharpening member attached to the base member and being adapted to straighten a blade of a knife. The apparatus further includes an edge sharpener disposed within the base member and adapted to sharpen an edge of a knife.
- According to a further illustrative embodiment, a blade sharpening apparatus includes a base member including a front face and a rear face and a slot defined in said base member adapted to receive and guide a blade to be sharpened. The apparatus further includes a blade sharpening member attached to the base member and being adapted for operation upon guidance of the blade through the slot and an edge sharpener disposed adjacent an end of the slot or an edge of the base member and adapted to sharpen an edge of a knife.
- According to yet another illustrative embodiment, a blade sharpening apparatus includes a base member including a front face and a rear face and a slot defined in said base member adapted to receive and guide a blade to be sharpened. The apparatus further includes a blade sharpening member attached to the base member and being adapted for operation upon guidance of the blade through the slot and a cavity disposed within the rear face of the base member adjacent the slot or an edge of the base member. An edge sharpener is disposed within the cavity and adapted to sharpen an edge of a knife, the edge sharpener including first and second opposing sharpening members forming a V-shaped channel and an attachment mechanism for retaining the edge sharpener within the cavity.
- The above mentioned and other features of this disclosure and the manner of obtaining them will become more apparent, and the disclosure itself will be best understood by reference to the following description of embodiments of the disclosure taken in conjunction with the accompanying drawings in which:
-
FIG. 1 is a front view of the preferred embodiment of the blade sharpening apparatus; -
FIG. 2 is a rear view of the embodiment ofFIG. 1 illustrating oppositely shaped rear spring caps; -
FIG. 3 shows a rear spring cap as illustrated inFIG. 2 accommodating a biasing member; -
FIG. 4 is a perspective view illustrating a second embodiment of the blade sharpening apparatus; -
FIG. 5 is a front view illustrating the blade sharpening apparatus ofFIG. 4 ; -
FIG. 6 is a side view, taken along lines 6-6 ofFIG. 5 ; -
FIG. 7 is a front view illustrating a blade sharpening apparatus of another embodiment; -
FIG. 8 is a side view, taken along lines 8-8 ofFIG. 7 ; -
FIG. 9 is a front view illustrating a blade sharpening apparatus of another embodiment; -
FIG. 10 is a side view, taken along the lines 10-10 ofFIG. 9 ; -
FIG. 11 is a front view illustrating a further embodiment of a blade sharpening apparatus including three edge sharpeners; -
FIG. 12 a rear view of the embodiment ofFIG. 11 illustrating attachment of the three edge sharpeners to the blade sharpener; -
FIG. 13 is a top isometric view depicting a first embodiment of an edge sharpener including a rod holder for holding ceramic rods for sharpening an edge of a knife or other implement; -
FIG. 14 is a front view of the edge sharpener ofFIG. 13 ; -
FIG. 15 is a rear view of the edge sharpener ofFIG. 13 ; -
FIG. 16 is a side view of the edge sharpener ofFIG. 13 ; -
FIG. 17 is a top view of the edge sharpener ofFIG. 13 ; -
FIG. 18 is a top isometric view of a second embodiment of an edge sharpener including two carbide blades; -
FIG. 19 is a front view of the edge sharpener ofFIG. 18 ; -
FIG. 20 is a bottom view of the edge sharpener ofFIG. 18 ; -
FIG. 21 is a side view of the edge sharpener ofFIG. 18 ; -
FIG. 22 is a view along the line ofsight 22 ofFIG. 19 ; -
FIG. 23 is a view along the line ofsight 23 ofFIG. 19 ; -
FIG. 24 is a top isometric view of a third embodiment of an edge sharpener including two carbide blades; -
FIG. 25 is a front view of the edge sharpener ofFIG. 24 ; -
FIG. 26 is a bottom view of the edge sharpener ofFIG. 24 ; -
FIG. 27 is a view along the line ofsight 27 ofFIG. 24 ; -
FIG. 28 is a view along the line ofsight 28 ofFIG. 24 ; -
FIG. 29 is a front view illustrating a further embodiment of a blade sharpening apparatus including three edge sharpeners and a handle; and -
FIG. 30 is a rear view of the blade sharpening apparatus ofFIG. 24 . - Other aspects and advantages of the present disclosure will become apparent upon consideration of the following detailed description, wherein similar structures have like or similar reference numerals.
- The present disclosure is directed to a blade sharpening apparatus. While the present disclosure may be embodied in many different forms, several specific embodiments are discussed herein with the understanding that the present disclosure is to be considered only as an exemplification of the principles of the blade sharpening apparatus disclosed herein, and it is not intended to be limited to the embodiments illustrated.
- In the Figures, like reference numerals indicate the same elements throughout. Referring to
FIG. 1 , a front view illustration of a illustrative blade sharpening apparatus of the present disclosure generally designated as 10 is shown. Theblade sharpener 10 generally includes abase member 12 having afront face 14. Aslot 18 is formed in the base member for receiving and guiding a blade during sharpening. Anentrance 19 allows the blade to be inserted through theslot 18. Thebase member 12 also includes a pair ofapertures members base member 12. Theblade sharpener 10 ofFIG. 1 includes first, second and third sharpeningmembers member 32 is positioned behind the second sharpeningmember 30, which is more clearly illustrated inFIG. 4 ), curved rods, which are used to sharpen the cutting edge of a knife blade or other cutting tools such as a scissors, shears or hedge trimmers. The sharpeningmembers rods rods - The
base member 12 is provided withstop members members FIG. 1 , and a second position as illustrated by the dotted lines inFIG. 1 . Stopmembers base member 12 for easier removal and reassembly. Thestop members front face 14 of thebase member 12. - The
base member 12 is generally formed of a hard durable plastic, such as polypropylene, that is easily cleaned by water and/or a cleansing solution. Thebase member 12 can be formed of any desired shape. - Rotatable posts 44 and 46 extend outwardly from the
front face 14 of the base member and are rotatable about a central axis of theapertures rods rod 28 is secured to post 44. As best shown inFIG. 6 , thepost 44 includes astem 52 extending from one end. The same stem is present onpost 46, which is identical in structure to post 44. - The
blade sharpener 10 includestop guide rails slot 18. The guide rails 48 and 50 may be formed of metal and angled toward theentrance 19 of theslot 18 to guide a blade into theslot 18 without the blade contacting thebase member 12. Alternately, the guide rails 48 and 50 can be offset with one higher than the other as shown inFIG. 7 to help guide the blade into theslot 18. The gap betweenguide rails 48 may be slightly narrower than theslot 18. - The sharpening
members members FIGS. 7-9 . The embodiments ofFIGS. 1-6 illustrate three sharpening rods, but either ofrods slot 18 from each side thereof. Also, embodiments can be constructed having more than three sharpening rods if desired. Therods rod 28 extends. - The
stop members stop members base member 12, thestop members stop members - The biasing
members rotatable posts members - The
base member 12 further includes mountingholes 64 so that theblade sharpening apparatus 10 can be secured to a work station, countertop, machine, assembly line or the like. Bolts can be inserted through mountingholes 64 and mounting surface, and then fastened with nuts and washers as appropriate. Alternately, theblade sharpener 10 can be mounted on the top of a work table or cuttingboard using grooves 65 in the bottom lip ofbase member 12. - The
posts posts front cover portion 68 in the form of a skirt that overlies and seals theapertures front face 14 of thebase member 12. Thefront cover portion 68 is rotatably received in a recess 70 (FIG. 6 ) formed within theapertures -
FIG. 2 shows arear face 16 of the illustrative embodiment ofFIG. 1 with oppositely shaped rear spring caps 97 and 98 on each side of theslot 18. In this illustrative embodiment, that can be used in conjunction with any of the later described embodiments, the present disclosure includes two oppositely shaped rear spring caps 97 and 98 that fit intocomplementary shapes 99 on therear face 16. Thecaps rotatable posts 44 and 46 (or 72 and 74 described later with regard toFIGS. 7 and 8 ) and the sharpening members. Thecaps rear face 16, such as “A” and “B” as shown inFIG. 2 . The indicium on at least one rear spring cap corresponds to the indicium on an adjacent portion of the rear face. If the spring caps 97 and 98 are put into the wrong side, it is impossible to assemble theblade sharpener 10 because the flanges will not fit into the base. - The
caps rear face 16 of thebase member 12 similar to therear cover portions 58 discussed below and illustrated inFIG. 6 . Thecaps central bore 62 and arecess 63, which receives astem 52. The term “rear cover portions” is meant to definecaps screw 60 passes through thecentral bore 62 and is secured into the end ofstem 52, thereby sealing theapertures rear face 16 thereof and securing therotatable posts base member 12 and are able to rotate with their associated sharpening members. - As shown in
FIG. 3 , acap 97 accommodates a biasingmember 24 shielding it from contaminants during use. The side shown inFIG. 3 would face inward toward therear face 16. The biasingmember 24 may be completely inserted into a recess in thecap 97 and, as a torsion spring as shown, is attached at oneend 101 to thecap 97 and coiling in a counterclockwise direction. For this specific configuration, thestem 52 would have at least two flattened sides to coordinate with the second end 102 of the biasingmember 24, which is shown as three sides of a square. The “B”cap 98 would be of a similar construction, but opposite with the coil rotating in the clockwise direction. - In operation, a blade with rolled edges is positioned at the top of
slot 18 and passed downwardly to the bottom of theslot 18 through the sharpeningmembers members contact stop member 36. Then with light pressure, the blade is drawn across the sharpeningmembers members members stop members - After the straightening procedure, the blade may also be sharpened. At the top of the
slot 18, the handle or hilt end of the blade is positioned close to thefront face 14, while the pointed end of the blade extends well beyond therear face 16, depending on the length of the blade. The blade is ideally pulled about three-quarters of the way down theslot 18 through the sharpeningmembers slot 18 to the bottom, it is also drawn horizontally through theslot 18 so the entire length of the blade is sharpened from the hilt to the point. The sharpeningmembers members members FIGS. 1 and 5 to the second position shown in dotted lines when the blade passes from top to bottom. The sharpeningmembers slot 18 from right to left, as shown inFIGS. 1 and 5 , while theblade 28 extends downwardly and acrossslot 18 from left to right. The blades intersect in a V-shape to lie across the slot. When sharpening the unrolled blade, the blade should ideally not be pushed all the way down so that the sharpeningmembers stop member 36. - Referring to
FIGS. 4-6 , another embodiment of ablade sharpening apparatus 10 of the present disclosure is illustrated. Theblade sharpener 10 generally includes abase member 12 having afront face 14, arear face 16, and aslot 18 formed in the base member for receiving and guiding a blade during sharpening. Thebase member 12 also includes a pair ofapertures members base member 12. Theblade sharpener 10 ofFIGS. 4-6 includes first, second and third sharpeningmembers - The
base member 12 is provided withstop members members FIG. 5 , and a second position as illustrated by the dotted lines inFIG. 5 . Thestop members base member 12 for easier removal and reassembly. Thestop members front face 14 of thebase member 12. - Rotatable posts 44 and 46 extend outwardly from the
front face 14 of the base member and are rotatable about a central axis of theapertures rods rod 28 is secured to post 44. - The
blade sharpener 10 includestop guide rails slot 18. The guide rails 48 and 50 may be angled toward theslot 18 to guide a blade into theslot 18 without the blade contacting thebase member 12. The gap betweenguide rails 48 may be slightly narrower than theslot 18. -
FIG. 6 illustrates how the biasingmember 124, or spring, is entirely enclosed within thebase member 12, which prevents the accumulation of debris, particles and other contaminants, and which advantageously makes the present disclosure ideally suitable for industrial use. - As best shown in
FIG. 6 , thepost 44 includes astem 52 extending from one end. The same stem is present onpost 46, which is identical in structure to post 44. Disposed within theaperture 20 is aflange 54 configured so that thespring 124 is positioned concentrically over thestem 52. Thespring 124 has a pair of free ends, one of which is fastened to thepost 44, and the other of which is connected to theflange 54, bysuitable fasteners - The
blade sharpening apparatus 10 further includesrear cover portions 58 for sealing theapertures base member 12.FIG. 6 illustrates one such cover portion, which in this case each have an identical configuration. Thecover portions 58 are located on the opposite side of theposts rear cover portions 58 include acentral bore 62 and arecess 63, which receives thestem 52. Ascrew 60 passes through thecentral bore 62 and is secured into the end ofstem 52, thereby sealing theapertures rotatable posts - The operation of the blade sharpening apparatus embodiment of
FIGS. 4-6 is substantially the same as shown and described inFIGS. 1-3 for the illustrative embodiment. -
FIGS. 7 and 8 , illustrate another embodiment of ablade sharpening apparatus 70 incorporating the features of the present disclosure. Theblade sharpener 70 generally includes abase member 12A having a slot 18A with a pair ofapertures 20A and 22A located at the lower portion of slot 18A. Sharpeningmembers rotatable posts apertures 20A and 22A. In this embodiment, the sharpeningmembers posts segments segments abut stop members apparatus 70 is in the “at rest” position illustrated in full lines inFIG. 7 . Eachpost rear nut 88 that secures each post within therespective aperture 20A or 22A. A biasing member 85, illustrated as a coil spring, is concentrically mounted over eachpost FIG. 8 as having one free end constrained by a wall of theapertures post 72 such that the sharpening members are biased to assume a first position shown in full lines inFIG. 7 . The resilient biasing member 85 is substantially entirely enclosed withinrespective apertures 20A and 22A by thenut 88 on the rear face and the threaded portion 86 on the front face. A skirted cover portion (not shown) may be placed on the front face 14A similar to thefront cover portion 68 illustrated inFIG. 4 . The major distinction between the embodiment shown inFIGS. 4-7 and the embodiment ofFIGS. 7 and 8 has to do with the orientation of the sharpening members. In the embodiment ofFIGS. 4-6 , the sharpening members are mounted toward the top of the slot and extend downwardly across the slot. In the embodiment ofFIGS. 7 and 8 , the sharpening members are mounted toward the bottom of the slot and extend upwardly across the slot. - In operation, the biasing members of
FIGS. 7 and 8 position the sharpeningmembers FIG. 7 . The blade is inserted into the upper portion of slot 18A and, by a downward and simultaneous horizontal movement, the sharpeningmembers FIG. 4 , as the blade is sharpened. Upon removal of the blade from the slot, the resilient biasing members 85 rotate theposts members slot 18. One of top guide rails extends farther from the base member than the other to assist the insertion of a blade. Also the guide rails 48 and 50 extend well above the base member to provide a potential hanging means for when the apparatus is not in use. - Referring to
FIGS. 9 and 10 , another embodiment of ablade sharpening apparatus 90 incorporating the features of the present disclosure is illustrated. Theblade sharpener 90 includes a base member 12B having a slot 18B disposed at a mid-portion thereof. The apertures 20B and 2 B are located adjacent the slot 18B at an upper end thereof. The sharpeningmembers 28B and 30B are formed from straight steel rods. This embodiment shows semicircular top guide rails 48. - A pair of rotatable posts 92 is provided, with a post extending through each
aperture 20B, 22B. Each post is threaded at both ends with anut 93 secured over the post at the rear thereof, as illustrated inFIG. 7 . A resilient biasing member in the form of atorsion spring 94 is shown mounted within the aperture 20B overlying and concentric with the post 92. Thespring 94 is connected at one end to the post 92 and at the other end to the base member. Anelbow 96 connects the post 92 to sharpening member 28B. - The operation of the blade sharpening apparatus of
FIGS. 9 and 10 is substantially the same as that shown and described inFIGS. 1-6 . - A further embodiment of a
blade sharpening apparatus 10 is shown inFIGS. 11 and 12 . The components of theapparatus 10 that are similar to the previous embodiments are numbered similarly. Theapparatus 10 ofFIGS. 11 and 12 further includes one ormore edge sharpeners 200. The embodiment ofFIG. 11 includes threeedge sharpeners 200. In particular, and referring toFIG. 12 , generallyrectangular cavities 202 are formed within therear face 16 of theedge sharpening apparatus 10. The edge sharpeners 200 are disposed within the cavities and may be retained by screws 204. Optionally, an adhesive, a bolt and nut, a friction fit, an interference fit, material welding, or any other retention mechanism known in the art may be utilized. - An
edge sharpener 200 may be placed at the bottom ofslot 18.Guide rails FIGS. 1 , 2, 4, 5, 7, and 9 may be utilized at or near the opening s of theedge sharpeners 200 onslot 18 ofFIGS. 11 and 12 . - A first embodiment of an
edge sharpener 200 is depicted inFIGS. 13-17 . Theedge sharpener 200 generally includes arod holder 210 and tworods FIG. 14 ). Therod holder 210 may have aU-shaped body 214 forming aU-shaped channel 215 with first and second opposingwalls portion 220 that may have a height that is slightly greater than half a height of thewalls portion 220 extends between afirst end 222 and asecond end 224 of therod holder 210. Thesecond wall 218 and the connectingportion 220 are truncated at thefirst end 222 of therod holder 210 to form anangled wall 230. As best seen inFIG. 14 , theangled wall 230 is angled in two manners, in particular, theangled wall 230 is disposed at a first angle A1 that may be between about 2 and about 45 degrees, preferably between about 12 and about 28 degrees, and more preferably about 17.5 degrees with respect to alongitudinal axis 232 of therod holder 210 and may be disposed at a second angle A2 that may be between about 0 and about 45 degrees, preferably between about 10 and about 30 degrees, and more preferably about 20 degrees with respect to alateral axis 234 of therod holder 210. - As best seen in
FIG. 15 , therod holder 210 further includes a firstangled channel 240 having afirst portion 242 extending through thefirst wall 216 and asecond portion 244 terminating in the connectingportion 220 below theU-shaped channel 215. As seen inFIG. 14 , therod 212 a is disposed within thechannel 240 with afirst end 250 of therod 212 a within thefirst portion 242, asecond end 252 of therod 212 a within thesecond portion 244, and acentral portion 254 of therod 212 a extending into theU-shaped channel 215. Similarly, as best seen inFIG. 15 , therod holder 210 includes a secondangled channel 260 having afirst portion 262 extending through thesecond wall 218 and asecond portion 264 terminating in the connectingportion 220 below theU-shaped channel 215. Referring toFIG. 14 , therod 212 b is disposed within thechannel 260 with afirst end 270 of therod 212 b within thefirst portion 262 of thechannel 260, asecond end 272 within thesecond portion 264 of thechannel 260, and acentral portion 274 of therod 212 b extending into theU-shaped channel 215. - Still referring to
FIGS. 14 and 15 , each of therods rod holder 210 throughcorresponding apertures respective channels rods rods rod holder 210 beyond anupper surface 280 of therod holder 210. This provides therod holder 210 with installedrods cavity 202, which prevents migration of particles from a knife into thecavity 202. Each of thechannels longitudinal axis 232. An angle A4, which may be between about 4 and about 90 degrees, preferably between about 4 and about 90 degrees, and more preferably about 35 degrees, may therefore be formed by the intersection of therods edges intersection 284 of therods longitudinal axis 232. - As best seen in
FIGS. 13-15 and 16, a generallycylindrical bore 300 may extend through the connectingportion 220. Thebore 300 includes afirst section 302 disposed through thesecond end 224 of therod holder 210 and asecond section 304 disposed through thefirst end 222 of therod holder 210. Thesecond section 304 has a side wall with threading that cooperates with threads on a screw and thefirst section 302 has a greater diameter than thefirst section 304. An end of screw 306 may be inserted and screwed into thesecond section 304 to attach therod holder 210 within thecavities 202 of theblade sharpening apparatus 10. As seen inFIG. 16 , thecavities 202 may also include threaded bores aligned with thesecond section 304 of thebore 300 such that, when the screw 306 is threaded into thesecond section 304 of thebore 300, threading continues into the threaded bore within theblade sharpening apparatus 10 to attach therod holder 10. Threading continues until alower edge 308 of ahead 310 of the screw 306 abuts asurface 312 formed between the first andsecond sections bore 300. While one specific embodiment for attachment of therod holder 210 to theblade sharpening apparatus 10 is described and shown, it should be understood by one skilled in the art that any attachment mechanism known in the art may optionally be utilized and/or variations of the attachment mechanism shown inFIG. 16 are possible. - The
rods edge sharpener 200 ofFIGS. 12-17 may be made of a ceramic material, for example, a nonporous zirconia or alumina ceramic, or an equivalent ceramic material. Optionally, therods - A second embodiment of an
edge sharpener 400 is depicted inFIGS. 18-23 . Theedge sharpener 400 comprises a carbide insert, for example a nickel-based carbide, having twocarbide blades sharpener 400 may be a unitary or one-piece construction. Each of theblades top wall bottom wall outer side wall top walls bottom walls side walls bottom walls edge sharpener 400. Thebottom walls top walls bottom walls Angled side walls top walls bottom walls cavity 414 between theangled side walls - Referring to
FIGS. 19 , 20, and 22, theangled side wall 412 a may be disposed at an angle A6 that may be between about 2 and about 45 degrees, preferably between about 12 and about 28 degrees, and more preferably about 17.5 degrees respect to alongitudinal axis 420 of theedge sharpener 400. Further, theangled side wall 412 a may be generally parallel to alateral axis 422 of the edge sharpener 400 (and therefore at an angle A7 of about 90 degrees with respect to afront surface 424 of theblade 404 a). Anoutermost edge 426 of theangled side wall 412 b may be disposed at an angle A8 that may be between about 2 and about 45 degrees, preferably between about 12 and about 28 degrees, and more preferably about 17.5 degrees with respect to thelongitudinal axis 420 of theedge sharpener 400 and may be disposed at an angle A9 that may be between about 0 and about 45 degrees, preferably between about 10 and about 30 degrees, and more preferably about 20 degrees with respect the lateral axis 422 (and therefore at an angle A10 that may be between about 45 and about 90 degrees, preferably between about 60 and about 80 degrees, and more preferably 70 degrees with respect to afront face 427 of theblade 404 b). In particular, theside wall 412 b is angled away from theother blade 404 a. Similar to theedge sharpener 200 ofFIGS. 14-17 , theside walls intersection 429 of thesidewalls edge sharpener 200 ofFIGS. 14-17 , theedge sharpener 400 may include abore 430 for insertion of a screw and attachment to theblade sharpening apparatus 10. - A further embodiment of an
edge sharpener 400 similar to that ofFIGS. 18-23 is depicted inFIGS. 25-28 . The only difference is that theside wall 412 a is also angled with respect to thelateral axis 422. Referring specifically toFIG. 27 , theside wall 412 a may be angled inwardly toward theblade 404 b at an angle A11 that may be between about 0 and about 45 degrees, preferably between about 10 and about 30 degrees, and more preferably about 20 degrees with respect to the lateral axis 422 (and therefore at an angle A12 that may be between about 45 and about 90 degrees, preferably between about 60 and about 80 degrees, and more preferably about 70 degrees with respect to thefront surface 424 of theblade 404 a). - A further embodiment of a
blade sharpening apparatus 10 as seen inFIGS. 29 and 30 is identical to the apparatus ofFIGS. 12 and 13 except that theapparatus 10 ofFIGS. 29 and 30 includes ahandle 500. Thehandle 500 includes a first generallyhorizontal portion 502 extending outwardly from theblade sharpener 10 and a second generallyvertical portion 504 extending downwardly and away from thehorizontal portion 502. Thevertical portion 504 is generally parallel to and spaced forwardly from theblade sharpener 10 so that thehorizontal portion 502 can be placed onto a surface for support while a user holds thevertical portion 504. A shield 506 extends outwardly from thehandle 500 opposite thehorizontal portion 502 to protect a user's hand from particles that might migrate from the knife during a straightening or sharpening operation. - As seen in
FIGS. 12 , 13, 29, and 30, theedge sharpeners edge 320 of theblade sharpening apparatus 10 or at anend 322 of theslot 18. In one embodiment, if one ormore edge sharpeners edge 320 of theapparatus 10, achannel 324 is formed in theedge 320 such that outwardly extendingportions 326 are formed beyond theedge 320. Thecavity 202 is disposed immediately below thechannel 324 such that therod holder 210 withrods center portions rods 212 a, 212 h, respectively, extending into thechannel 324. The outwardly extendingportions 326 cover thewalls rod holder 210 and thechannel 324 and the outwardly extendingportions 326 form a guiding structure for the blade of a knife. - During use of the
blade sharpening apparatus 10, a user may draw a knife through therods blades edge sharpener more edge sharpeners members blade sharpening apparatuses 10 ofFIGS. 12 , 13, 29, and 30 allows a user to straighten and sharpen a knife blade in a single device, which saves time. With theapparatus 10, a user does not have to stop what they are doing to have their knife sharpened or retrieve a new knife. - While three
edge sharpeners FIGS. 12 and 13 , any number ofedge sharpeners 200 may be utilized at theend 322 of theslot 18 or positioned along theedge 320 of theblade sharpening apparatus 10. In one embodiment in whichmultiple edge sharpeners 200 are utilized, theedge sharpeners 200 may have different dimensions, for example, for different sized or shaped knives. In a further embodiment in whichmultiple edge sharpeners 200 are utilized, therods blades rods blades first sharpener rods blades second sharpener rods blades third sharpener - The edge sharpeners 200, 400 may be utilized with any of the
blade sharpening apparatuses 10 disclosed herein. Ifmultiple edge sharpeners blade sharpening apparatus carbide blade sharpeners - Any of the embodiments described herein may be modified to include any of the structures or methodologies disclosed in connection with other embodiments.
- Further, although directional terminology, such as front, back, upper, lower, etc. may be used throughout the present specification, it should be understood that such terms are not limiting and are only utilized to convey the orientation of different elements with respect to one another.
- The above description is intended to be illustrative and not limiting. Although the illustrative embodiments are illustrated and described in connection with particular types of blade sharpening apparatuses, they may be adapted for use with a variety of blade sharpening apparatuses. Other embodiments and equivalent tools are envisioned. Various features have been particularly shown and described in connection with the illustrated embodiments, however, it must be understood that these particular embodiments are merely illustrative and that the disclosure is to be given its fullest interpretation.
Claims (20)
1. A blade sharpening apparatus comprising:
a base member including a front face and a rear face;
a blade sharpening member attached to the base member and being adapted to straighten a blade of a knife; and
an edge sharpener disposed within the base member and adapted to sharpen an edge of a knife.
2. The blade sharpening apparatus of claim 1 , wherein the blade sharpening member includes a slot extending inwardly from an edge of the base member and at least two sharpening members disposed on opposing sides of the slots.
3. The blade sharpening apparatus of claim 2 , wherein each of the at least two sharpening members is attached to a biasing member that biases a respective sharpening member toward an opposing sharpening member.
4. The blade sharpening apparatus of claim 3 , wherein when a blade of a knife is moved along the channel, the blade pushes the sharpening members against the bias of the biasing members until the sharpening members are stopped by respective posts.
5. The blade sharpening apparatus of claim 4 , wherein the sharpening members are curved.
6. The blade sharpening apparatus of claim 1 , wherein a cavity is disposed within the base member and the edge sharpener is disposed within the cavity.
7. The blade sharpening apparatus of claim 6 , wherein the edge sharpener includes a holder that is retained within the cavity and first and second opposing sharpening members forming a V-shaped channel.
8. The blade sharpening apparatus of claim 7 , wherein the holder includes a U-shaped body forming a U-shaped channel with first and second opposing walls joined by a connecting portion, a first channel formed at least partially through the first wall and the connecting portion, and a second channel formed at least partially through the second wall and the connecting portion, wherein the first and second sharpening members are positioned within the first and second channels, respectively.
9. The blade sharpening apparatus of claim 8 , wherein the first and second channels are angled such that the first and second sharpening members are disposed at an angle of between about 4 degrees and about 90 degrees with respect to one another.
10. The blade sharpening apparatus of claim 1 , wherein the edge sharpener includes two blades each having a top wall, a bottom wall, an outer side wall extending between the top and bottom walls, and angled side walls extending between the top and bottom walls to form a V-shaped cavity therebetween, wherein the top walls have widths that are less than widths of corresponding bottom walls.
11. The blade sharpening apparatus of claim 10 , wherein a first of the angled side walls forms an first angle with respect to a longitudinal axis of the edge sharpener that is between about 2 and about 45 degrees and a second of the angled side walls forms a second angle with respect to the longitudinal axis of the edge sharpener that is between about 2 degrees and about 45 degrees.
12. The blade sharpening apparatus of claim 11 , wherein one of the first and second angled side walls includes an edge that is disposed at an outward angle of between about 0 degrees and about 45 degrees with respect to a lateral axis of the edge sharpener.
13. The blade sharpening apparatus of claim 12 , wherein the other of the first and second angled side walls includes an edge that is disposed at an inward angle of between about 0 and about 45 degrees with respect to the lateral axis.
14. A blade sharpening apparatus comprising:
a base member including a front face and a rear face;
a slot defined in said base member adapted to receive and guide a blade to be sharpened;
a blade sharpening member attached to the base member and being adapted for operation upon guidance of the blade through the slot; and
an edge sharpener disposed adjacent an end of the slot or an edge of the base member and adapted to sharpen an edge of a knife.
15. The blade sharpening apparatus of claim 14 , wherein the blade sharpening member includes at least two sharpening members disposed on opposing sides of the slot and wherein each of the at least two sharpening members is attached to a biasing member that biases a respective sharpening member toward an opposing sharpening member.
16. The blade sharpening apparatus of claim 15 , wherein when a blade of a knife is moved along the channel, the blade pushes the sharpening members against the bias of the biasing members until the sharpening members are stopped by respective posts.
17. The blade sharpening apparatus of claim 14 , wherein the edge sharpener includes a holder that is retained within the cavity, first and second opposing sharpening members forming a V-shaped channel, and a U-shaped body forming a U-shaped channel with first and second opposing walls joined by a connecting portion, a first channel formed at least partially through the first wall and the connecting portion, and a second channel formed at least partially through the second wall and the connecting portion, wherein the first and second sharpening members are positioned within the first and second channels, respectively.
18. The blade sharpening apparatus of claim 14 , wherein the edge sharpener includes two blades each having a top wall, a bottom wall, an outer side wall extending between the top and bottom walls, and angled side walls extending between the top and bottom walls to form a V-shaped cavity therebetween, wherein the top walls have widths that are less than widths of corresponding bottom walls.
19. The blade sharpening apparatus of claim 18 , wherein a first of the angled side walls forms an first angle with respect to a longitudinal axis of the edge sharpener that is between about 2 and about 45 degrees and a second of the angled side walls forms a second angle with respect to the longitudinal axis of the edge sharpener that is between about 2 degrees and about 45 degrees.
20. A blade sharpening apparatus comprising:
a base member including a front face and a rear face;
a slot defined in said base member adapted to receive and guide a blade to be sharpened;
a blade sharpening member attached to the base member and being adapted for operation upon guidance of the blade through the slot; and
a cavity disposed within the rear face of the base member adjacent the slot or an edge of the base member; and
an edge sharpener disposed within the cavity and adapted to sharpen an edge of a knife, the edge sharpener including first and second opposing sharpening members forming a V-shaped channel and an attachment mechanism for retaining the edge sharpener within the cavity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/746,511 US20140038504A1 (en) | 2012-01-23 | 2013-01-22 | Blade sharpening apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201261589579P | 2012-01-23 | 2012-01-23 | |
US13/746,511 US20140038504A1 (en) | 2012-01-23 | 2013-01-22 | Blade sharpening apparatus |
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US20140038504A1 true US20140038504A1 (en) | 2014-02-06 |
Family
ID=50025941
Family Applications (1)
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US13/746,511 Abandoned US20140038504A1 (en) | 2012-01-23 | 2013-01-22 | Blade sharpening apparatus |
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US (1) | US20140038504A1 (en) |
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US20170014001A1 (en) * | 2015-07-15 | 2017-01-19 | Lifetime Brands, Inc. | Cutting board with integrated knife sharpener |
US20180104796A1 (en) * | 2016-10-18 | 2018-04-19 | Jiin Haur Industrial Co., Ltd. | Knife sharpener |
WO2022015412A1 (en) * | 2020-07-17 | 2022-01-20 | Primedge, Inc. | Blade sharpener |
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US6817269B1 (en) * | 2003-07-03 | 2004-11-16 | G5 Outdoors, L.L.C. | Edge sharpener |
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US20070101826A1 (en) * | 2002-11-12 | 2007-05-10 | Southern Mechanical & Structural, Inc. | Knife sharpener |
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US1462080A (en) * | 1921-04-01 | 1923-07-17 | Bohlin Arvid | Knife sharpener |
US1573875A (en) * | 1924-08-21 | 1926-02-23 | James E Shaw | Knife sharpener |
US4934110A (en) * | 1985-04-22 | 1990-06-19 | John Juranitch | Edge sharpening apparatus |
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US20170014001A1 (en) * | 2015-07-15 | 2017-01-19 | Lifetime Brands, Inc. | Cutting board with integrated knife sharpener |
US9980613B2 (en) * | 2015-07-15 | 2018-05-29 | Lifetime Brands, Inc. | Cutting board with integrated knife sharpener |
US20180104796A1 (en) * | 2016-10-18 | 2018-04-19 | Jiin Haur Industrial Co., Ltd. | Knife sharpener |
US10220490B2 (en) * | 2016-10-18 | 2019-03-05 | Jiin Haur Industrial Co. Ltd. | Knife sharpener |
WO2022015412A1 (en) * | 2020-07-17 | 2022-01-20 | Primedge, Inc. | Blade sharpener |
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