242 results about "Knife sharpener" patented technology

A sharpener for blades comprises a physical structure supporting at least one abrasive surface. A displaceable guiding plate having an integral linear structural feature of the support is disposed toward one side of the abrasive surface. The linear structural feature provides sliding contact with a face of the blade to establish the relative angle of the plane of the edge facet of the blade with the plane of the abrasive surface at the point of mutual contact as the facet is guided into contact with the abrasive surface.

A fixed blade knife, includes a handle, and a blade, coupled to the handle. The blade has a tang received within the handle. A plurality of lashing points defined by passages extending through both the handle and the tang are provided. The knife may be carried in a sheath with a knife sharpener removably coupled to the sheath.

A knife sharpener has a housing, a base, a sharpening device and an adjustable device. The housing has a case, a cavity and a slot. The cavity is defined in the case and the slot is defined in the case and communicates with the cavity. The base is mounted on the housing and has a base board and two side walls formed on the base board. The sharpening device is movable mounted on the base and is received inside the housing. The sharpening device has two sharpening arms with sharpening rods. The adjustable device is mounted on the sharpening device mounted between the two sharpening arms. When the knife sharpener is used, the adjustable device is rotated to change the cross-position of the sharpening device. Therefore, a knife may be sharpened at a different site on the sharpening rods for prolonging the life span of the knife sharpener.

A knife sharpener is provided which is capable of precision sharpening of hunting and similar knives that have a first and second blade face, each of which terminates at a facet that meets the corresponding facet to create the knife edge. At least the first of the blade faces has a lower distinct planar or concave section adjacent the edge facet with the lower planar or concave section of the face being set at an angle to the center line of the blade thickness that is different from the angle of the adjoining upper section of the same blade face located adjacent to the back of the blade. The sharpener includes a sharpening member such as one having an abrasive coated surface. The sharpener also includes a planar angle knife guide surface of a knife guide which is designed for intimate sliding and sustaining contact with the second face of the blade in order to position an edge facet on the first of the faces into precise angular relation with the sharpening surface. The sharpener also includes a knife holding spring that applies force against the first face of the blade predominantly at one or more locations on the lower planar or concave section of the first face that is adjacent to the edge facet being sharpened in order that the lower section adjacent the edge on the second face of the blade is pressured to align with and remain in intimate sliding alignment with the guide surface as the blade edge facet on the first face is being sharpened.

A combination food cutting, storage and shredder apparatus, having a cutting board and storage box containing a knife drawer and a garbage disposal drawer. A shredder is positioned just above the garbage disposal drawer and just below the cutting board for holding scraps and peelings left over from the cutting board for disposal. The storage box also contains an outwardly extending knife sharpener.

An electrically powered knife sharpener for ceramic (or other brittle, crystalline or amorphous media which could be used for blades) knives includes at least one pre-sharpening stage with a sharpening member(s) and includes a final stage with a sharpening member(s). There are one or more motor driven shafts on which the abrasive surfaced sharpening members, such as disks, are mounted. Guide structure is provided to guide the knife for aligning and positioning the knife facet precisely at a defined location on the abrasive surface of each rotating sharpening member. The pre-sharpening stage sharpening member(s) moves in a first direction. The final stage sharpening member(s) moves in a second direction which differs from the first direction.

The invention provides an electric double-sided knife sharpener for people in order to save time and labor and rapidly and efficiently achieve the aim of double-sided knife sharpening. Two cylindrical knife grinders are vertically arranged on a support; cylindrical motors are arranged inside the knife grinders; the knife grinders are connected with the support through square column-shaped motor shafts; the lower knife grinder is fixed on the support; and the upper motor shaft can vertically move within a certain range so that knives with different thicknesses can be inserted. Two sides of the two square column-shaped motor shafts are respectively provided with two springs so that the upper knife grinder is pulled to abut against the lower knife grinder. The grinders rotate towards opposite directions under the drive of the motors to well grind a knife inserted between the two grinders.

A manual knife sharpener (10) is provided with angle control structure. The structure includes a guide member (20) having a guide surface (18) which forms an angle with the abrasive surface (14) of the sharpening member (12). When the blade (16) is inserted into the space between the abrasive surface (14) and the guide surface (18) the blade (16) presses against the guide surface (18) to displace the guide surface (18) linearly in a direction perpendicular to the guide surface (18) so that the movement is a lateral movement in the same plane without any pivoting or twisting of the guide member (20). Thus, the angle between the guide surface (18) and the abrasive surface (14) remains constant regardless of the extent of displacement of the guide member (20). <IMAGE>

Various forms of knife guides are provided for knife sharpeners to minimize damage to the knife blade. The knife guides include the provision of flexible fibers on the guide surface and further include rings, such as O-rings on an array of rollers when the rollers are used to form the guide surface. Other forms of knife guides are non-contact optical arrangements.

A combination sharpener assembly which is particularly useful for fishermen, includes an electrically powered knife sharpener. A manually operated scissors sharpener is mounted in the recess of the housing for the knife sharpener. A hook sharpener is detachably mounted in a compartment in the housing of the knife sharpener. The motor for the knife sharpener is mounted in a sealed inner housing and can be selectively operated under either direct current or alternating current.

The invention discloses a kitchen knife sharpener comprising a frame, a drive motor and a control system. A knife rest and a grinder device are disposed on the frame. The knife rest comprises a knife rest base and a knife clamping part. The knife rest base comprises a horizontal base plate which is manually pushed and pulled to move longitudinally back and forth on the frame. The knife clamping part comprises a horizontal knife-mounting transverse arm and a vertical connecting arm. The vertical connecting arm is connected to a vertical connecting plate of the knife rest base and driven to rotate by a rotating motor. The grinder device is arranged between the horizontal base plate and the horizontal tool-mounting transverse arm. The knife clamping part forms two grinding positions, having an angle larger than 120 degrees and smaller than 180 degrees, on the knife rest base; when a knife is at one optional grinding position, the central plane of the knife and the upper plane of a grinder have an included angle larger than 0 degree. The kitchen knife sharpener has the advantages that knife grinding loss is low, environmental pollution is zero, knife sharpening effect is high, and utilization rate of the grinder is high.

A cutter blade sharpener and method allows for quick, easy and uniform sharpening of tree felling head circular cutters. Each cutter blade is individually removed from the circular cutter and is positioned on the sharpener, one at a time whereby the cutter blades are then ground in uniform fashion. The sharpener includes a tubular frame having a slide table mounted thereon for both lateral and longitudinal movement of the cutter blade proximate the grinding wheel.

The invention discloses a straight knife sharpener comprising a lathe body, a grinding head assembly and a workbench assembly. Two lathe body linear guide rail pairs are arranged on the top face of the lathe body. The grinding head assembly is supported on the lathe body slidably by a grinding head movable base through the two lathe body linear guide rail pairs. A grinding head motor is installedon a grinding head sliding seat through a grinding head installing plate, and the grinding head sliding seat is driven by a grinding head feed motor and is slidably supported on the grinding head movable base. Position sensors are arranged on the grinding head movable base through vertical and transverse moving sliding seats and a detection driving device. The workbench assembly is located betweenthe left and right lathe body linear guide rail pairs. A workbench is supported on a lathe body in an oscillatory mode. A workpiece locating plate and a workpiece locating push arm are arranged on the two sides of a workbench body correspondingly. A grabbing manipulator is further slidably supported on the lathe body through the lathe body linear guide rail pairs and a side face linear guide railpair. Automatic feeding and discharging and automatic control of grinding precision can be achieved through the straight knife sharpener, a straight knife plane and a cutting edge bevel can be groundthrough one time of clamping, and production efficiency is high.

A knife sharpener comprising a housing plate supporting a pair of special treated sharpening rods that are curved to a specified dimension for maximizing the knife sharpener's ability to utilize and engage adjustable flexible bumper arms mounted on a positive stop that provides the sharpener's rods best angles and pressure for obtaining an even, consistent edge realignment, no matter what sharpening technique is used. Adjustable spring and cam mechanisms enable easy positioning of the initial, crossing-point of the sharpening rods over the center of a sharpening slot. A stop member and resilient device are used as a single integral stop unit vertically moveable and mounted on the rear face of the housing plate.

A knife sharpener comprises a grinding surface for grinding a blade of the knife when the blade is moved relative to the grinding surface and an observation device including a sensor element and a display element. The sensor element is configured to observe the blade and to collect data regarding the blade when the blade is moved relative to the sensor element. The display element is configured to communicate a condition of the blade to an operator of the observation device. The condition of the blade is based on the data collected by the sensor element when the blade is moved relative to the sensor element.

A knife sharpener system for efficiently and quickly sharpening a blade of a knife. The knife sharpener system generally includes a support structure, a sharpening unit including a retaining portion, wherein the sharpening unit extends from the support structure, at least one sharpening member extending from the sharpening unit and at least one magnet positioned within the sharpening unit, wherein the retaining portion is positioned between the sharpening member and the magnet and wherein a metal residue of a blade is magnetically attracted to the retaining portion via the magnet.

An improved knife sharpener may include a hub body, a freewheel unit, a connecting sleeve and an external freewheel. The connecting sleeve connects to the ratchet sleeve of the hub body in order to provide more space for the external freewheel. With the design of the connecting sleeve and the external freewheel unit, the hub body loaded with more smaller freewheels provides more pedaling speeds for a bicycle travelling downhill. When cycling downhill by using the smaller diameters of the sprockets, the smaller sprockets of the external freewheel can help a cyclist to maintain an optimum pedaling speed in a slopy terrain, and the speed of the bicycle can be easily controlled.

The invention discloses a gear grinding head and a guide rail type manual knife sharpener. The guide rail type manual knife sharpener mainly comprises the gear grinding head which is composed of a grinding body and a stem gear, a grinding head fixing part, a connecting rod, an adjustable tailstock, a tailstock positioning screw rod and a rack type guide rail, wherein the grinding body is a cylinder, one end face of the grinding body is a grinding surface, the other end face of the grinding body is an installation surface, a gear is arranged in the middle of the stem gear, a center positioning pillar is arranged at one end of the stem gear, the end, provided with the center positioning pillar, of the stem gear is bonded with and fixed to the grinding body, the other end of the stem gear is a grinding head shaft which is mounted at one end of the connecting rod, a tailstock installation groove is formed in the other end of the connecting rod, the adjustable tailstock is mounted in the groove, the adjustable tailstock is stretchable or foldable entirely, the rack type guide rail is linear or arc-shaped, a tooth row is arranged on one lateral side of the guide rail and can drive the gear on the gear grinding head in a rubbing mode to enable the gear to rotate proactively and limit the linear motion of the gear grinding head so that the grinding surface of the gear grinding head can be abraded evenly and be prevented from deforming, and meanwhile, the sharpening efficiency is improved remarkably.

The invention discloses a knife sharpener, in particular to a knife sharpening assembly of the knife sharpener. The knife sharpening assembly is installed in a knife sharpener body and comprises an upper grinding wheel (601), a lower grinding wheel (602), an upper grinding wheel motor (603), a lower grinding wheel motor (604) and a grinding wheel walking device (605), and a contracting device (609) enabling the upper grinding wheel (601) and the lower grinding wheel (602) to get close to each other is arranged between an upper twisting base and a lower twisting base. According to the invention, the distance between the upper grinding wheel and the lower grinding wheel can be automatically adjusted according to the thickness of the knife edge of the knife so as to adapt to different knives,so that the knife sharpener can be suitable for most household knives, and the current situation that a household knife grinder is poor in universality is solved.

The invention discloses a binding machine with the automatic knife sharpening function. The binding machine with the automatic knife sharpening function comprises a workbench (1), a knife sharpening mechanism which is fixed to the workbench (1) to make a knife sharpener (15) transversely move and be positioned in the circumferential direction, a rack (7) fixed to the workbench (1), and a binding mechanism which is fixed to the rack (7) and makes a binding knife (10) rotate and move up and down. The knife sharpening mechanism comprises a motor fixing frame (12) fixed to the workbench (1), a second motor (19) installed on the motor fixing frame (12), a second gear (14) installed on the output shaft (13) of the second motor, a second toothed bar (18) meshed with the second gear (14), and a knife sharpening base (16) in sliding fit with the second toothed bar (18). The second toothed bar (18) is provided with a sliding groove (22). A sliding rail (23) used in cooperation with the sliding groove (22) for vertical sliding is arranged at the lower end of the knife sharpening base (16). A spring (17) is arranged between the knife sharpening base (16) and the second toothed bar (18). According to the binding machine with the automatic knife sharpening function, the situation that knife sharpening is carried out after a tool bit of a binding machine is detached is avoided, automatic knife sharpening is carried out as needed in work, and the working efficiency of the binding machine is improved.