Adjustable weighting system in a knife handle

Abstract

The knife includes a blade and a handle attached to the blade. The handle includes a liner and a handle scale adapted to be removably secured to the liner by screws or the like. The handle scale has an inner side facing the liner and has a shaped area for securing weights at positions selected along the length of the handle scale. In one approach, there are a plurality of individual positions where one or more weights can be secured. The weights can be, for example, metal disks. In the case of a double-edged knife such as a butterfly knife, both handles can have a similar structure for storing weights. With the knife, the end user can easily customize the weight distribution of the knife without interfering with the envelope or outer surface of the handle.

Description

Background Art

[0001] [Cross - Reference to Related Applications]

[0002]

[0001] This application claims the benefit of priority of the earlier filing date of U.S. Non - Provisional Patent Application No. 17 / 858,981, filed on July 6, 2022, which is hereby incorporated by reference herein. [Technical Field]

[0003]

[0002] The present disclosure relates to the field of knives, and more particularly, to knives with adjustable weights. [Background]

[0003]

[0004] Knives are available in various designs for different purposes. Generally, a knife can be composed of either a fixed blade or a folding blade. Fixed - blade knives are suitable for powerful cutting operations, while folding knives are more compact. However, the specifications of a knife, such as its weight and the type of materials used, are selected by the manufacturer, so customization by the end - user is usually difficult or impractical.

Brief Description of the Drawings

[0005]

[0004] Embodiments will be readily understood by the following detailed description in conjunction with the accompanying drawings. The embodiments are shown by way of example and are not limited to the figures in the accompanying drawings.

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[0006] Detailed Description

[0007]

[0023] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof and are shown as exemplary embodiments that may be implemented. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope. Accordingly, the following detailed description is not to be taken in a limiting sense, and the scope of the embodiments is defined by the appended claims and their equivalents.

[0008]

[0024] Various operations may be described as a plurality of individual operations in sequence in a way that may be useful in understanding the embodiments. However, the order of the description should not be construed to mean that these operations are order-dependent.

[0009]

[0025] For the description, descriptions based on perspective such as up / down, back / front, top / bottom, etc. can be used. Such descriptions are used merely to facilitate consideration and are not intended to limit the application of the disclosed embodiments.

[0010]

[0026] The terms "coupled" and "connected" may be used together with their derivatives. It should be understood that these terms are not intended to be synonyms of each other. Rather, in certain embodiments, "connected" may be used to indicate that two or more elements are in direct physical contact with each other. "Coupling" may mean that two or more elements are in direct physical contact. However, "coupled" may also mean that two or more elements are not in direct contact with each other but still cooperate or interact with each other.

[0011]

[0027] For the purpose of the description, a phrase in the form of "A / B" or "A and / or B" means (A), (B), or (A and B). For the purpose of the description, a phrase in the form of "at least one of A, B, and C" means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B, and C). For the purpose of the description, a phrase in the form of "(A)B" means (B) or (AB), that is, A is an arbitrary element.

[0012]

[0028] In this description, the terms "embodiment" or "embodiments" can be used, and each of these terms can refer to one or more of the same or different embodiments. Further, terms such as "comprising", "including", "having", etc. used with respect to embodiments are synonymous.

[0013]

[0029] As described at the beginning, the options for customization of the knife by the end user are limited. For example, in some cases, it may be desirable to enable the end user / customer to modify the overall weight and weight distribution of the knife. Such modifications may be useful for tasks that require repeated rapid movement of the knife, such as slicing food. Another example scenario involves knives that are operated for art or entertainment. For example, there is an increasing number of knife enthusiasts who are interested in manipulating or flipping butterfly knives. The butterfly knife, also known as Balisong (BALI-SONG (registered trademark), Benchmade Knife Company, Inc., Oregon City, Oregon), fan knife, or Batangas knife, is a type of folding pocket knife native to the Philippines. It has two handles that can rotate counterclockwise around the tang. When the knife is closed, the blade is hidden in the grooves of the handle. The knife can be deployed and rotated in a one-handed flipping motion. Other knives that can be opened with one hand using a flipping motion, including so-called flipper knives, are also known. Additionally, in addition to folding knives, fixed-blade knives can also be operated.

[0014]

[0030] In the above and other scenarios, the dynamics of the knife are greatly affected by its weight distribution and balance. For example, in the case of a butterfly knife, increasing the weight at the free end of the handle improves the flipping speed. Therefore, the ability to customize the knife by changing the weight distribution is desirable in many scenarios.

[0015]

[0031] One possible solution is to replace the handle or back spacer and add a weight to the back of the knife. This indirectly corrects the balance as the weight may be added in an area that has little impact on the performance of the knife. Further, replacing the back spacer with a heavier material can be an expensive and complex option, and the back spacer may need to be made very large to achieve the desired effect. For example, replacing the back spacer with a high-density metal alloy such as tungsten alloy can be costly due to the relatively complex shape of the back spacer. The above solution also does not allow for easy customization and experimentation by end users with different weights at different positions within the handle.

[0016]

[0032] The technology described herein addresses the above and other problems. In one aspect, a knife includes a blade and a handle attached to the blade. The handle includes a liner and a handle scale adapted to be secured to the liner by screws or the like. The handle scale has an inner side facing the liner and has a shaped area along the length of the handle scale for securing weights at selected positions. In one approach, there are a plurality of individual positions or pockets for securing one or more weights. The weights may be, for example, metal disks or other metal objects. By using disks, rectangles, or other non-complex shapes, the cost of the weights can be minimized.

[0017]

[0033] In one possible approach, the shaped area of the handle scale has a wavy edge that provides a plurality of positions for placing metal disks. A similarly shaped area can be provided on the handle scale on the opposite side of the handle. In the case of a double-edged knife such as a butterfly knife, both handles can have a similar structure for storing weights.

[0018]

[0034] With a knife, the end user can easily customize the weight distribution of the knife without interfering with the envelope or outer surface of the handle. The user can add or remove weights as desired to achieve the desired weight distribution.

[0019]

[0035] The above and other advantages will become more apparent from the following description.

[0020]

[0036] FIG. 1 is a side view of an example butterfly knife 100 having an adjustable weighting system within the handle according to various embodiments. This technique can also be applied to single-handle knives.

[0021]

[0037] The knife includes a blade 110 having a tang 120. The tang has two holes through which pivot pins H1pp and H2pp are used to rotatably secure a first handle H1 and a second handle H2, respectively. The first handle H1 extends from a blade end H1be to a free end H1fe, and the second handle H2 extends from a blade end H2be to a free end H2fe. Each handle has a length L and a midpoint MP that divides the handle into a front half FH and a back half BH.

[0022]

[0038] Each handle can further include handle scales, also referred to as handle shells or covers, on both sides of the handle. This is a material that covers the outer surface of the handle where the knife is gripped. For example, the first handle has handle scales HS1-1 (shown in FIG. 1) and HS1-2 (shown in FIGS. 2-4). The second handle has handle scales HS2-1 (shown in FIG. 1) and HS2-2 (shown in FIGS. 2-4). In one possible approach, the handle scales are fastened to their respective liners by screws. For example, screws H1s1, H1s2 can be used for handle scale HS1-1, and screws H2s1, H2s2 can be used for handle scale HS2-1.

[0023]

[0039] One or more removable weights can be secured within the handle and handle scale. For example, handle scale HS1-1 secures weights W1-W3, and handle scale HS2-1 secures weights W4-W7. In this embodiment, the weights are circular, for example, metal disks. However, other shapes such as rectangular may be used. In this embodiment, different numbers of weights are used for the two handles, for example, three for H1 and four for H2.

[0024]

[0040] Handle scale HS1-1 further includes viewing ports or holes that allow one to see whether weights are present at positions corresponding to the viewing ports. That is, the user can easily look through the ports to confirm where the weights are placed. This is convenient especially after trying different configurations and numbers of weights, as the user may forget where the weights are placed. For example, viewing ports p1-p3 each allow viewing of portions of weights W1-W3. Similarly, handle scale HS2-1 includes viewing ports p4-p6 that allow viewing of portions of weights W4-W7. The handle scale can be made of a rigid material such as, for example, a glass fiber composite. Other materials can be used as well. The handle scale may be translucent, transparent, or completely opaque. Using a translucent or transparent handle shell allows one to see the weights and their positions even when the viewing ports are not in use.

[0025]

[0041] As shown in the figure, in one approach, the weights can be stored in the rear half of the handle but not in the front half. This is desirable because the effect of the added weights is most pronounced when in the rear half due to the rotation of the rear half about the pivot pin. Also, there is usually more room for the weights in the rear half of the handle as the width increases towards the free end. However, there is an option to store the weights in the front half.

[0026]

[0042] FIG. 2 is an enlarged view of a part of the handle of the knife of FIG. 1, including a handle scale, according to various embodiments. The handle scale is attached to each liner by screws. For example, in the first handle H1, the handle scale HS1-1 is attached to the liner L1-1, and the handle scale HS1-2 is attached to the liner L1-2. In the second handle H2, the handle scale HS2-1 is attached to the liner L2-1, and the handle scale HS2-2 is attached to the liner L2-2. The liner can be formed, for example, from sheet metal. The two liners of the handle are secured to each other by a combination of pins and screws, such as the combination 240 of pins and screws in the example within the first handle, and separated by a spacer, such as the spacer SP1 of the example. The combination of pins and screws allows the knife to be disassembled, such as to replace the back spacer. Alternatively, non-disassemblable rivets can also be used. The spacer can be formed from plastic or other suitable materials.

[0027]

[0043] The handle scale HS1-1 has a molding area SR1 capable of holding weights. The molding area may be on the inner surface of the handle scale facing the liner so as not to interfere with the shape of the outer surface of the handle scale held by the user. The molding area can be considered as a recessed area. The molding area SR1 includes a wavy edge SE1 having curved walls CW1-CW7. The seven curved walls enable one or more weights to be placed at various positions along the longitudinal axis LA1 of the handle H1. In this embodiment, three weights W1~W3 are arranged. The weights are thin metal disks to minimize the width of the handle, but other shapes can also be used. To provide the maximum weight within a specific capacity, the weights need to be made dense. One embodiment is tungsten or a tungsten alloy. In one approach, the weights are specially made for the handle, included in the knife, or sold as an additional charge option. The user can potentially use other metal objects around the house, such as coins, washers, and batteries, or malleable materials such as clay. One embodiment is Play-Doh® (Hasbro Inc.).

[0028]

[0044] The molding area SR1 further includes a wall SR1c facing the wavy edge, and walls SR1a and SR1b facing each other along the longitudinal axis LA1.

[0029]

[0045] A part W1a of the weight W1 can be seen at the observation port p1, and the other weights can be seen at other observation ports. The observation port p1 indicates that W1 is at the center of the position of the observation port p1. In contrast, in the handle scale HS2-1, for example, at the observation port p4, it is shown that the respective parts W4a and W5a of the weights W4 and W5 can be seen. In particular, the edges of these two weights are displayed. Similarly, the observation port p5 reveals the parts of the weights W4 and W5, and the observation port p6 reveals the parts of the weights W6 and W7. A further feature shown in the handle scale HS2-1 is the rubber string RC (see also Figure 3), which holds the weights in place to avoid rattling.

[0030]

[0046] The screw can be retracted from the outside of the handle shell. For example, the screw H1s1 is within the recess 250 so as not to protrude from the handle shell. Thus, this screw head does not prevent the user from gripping the handle. In this embodiment, the screw is a socket button head with a round profile and a hex socket drive. The user can easily remove the handle shell from the liner or secure the handle shell to the liner by rotating the screw with a hex key such as an Allen wrench. Other configurations are possible. For example, a socket flat head screw can be used, in which case the head is flush with or recessed from the outside of the handle shell.

[0031]

[0047] FIG. 3 is a view of the handle of FIG. 2 without the handle scales HS1a and HS2a, according to various embodiments. This figure shows the liners L1-1 and L1-2 of the first handle H1 and the liners L2-1 and L2-2 of the second handle H2. The handle scales HS1-2 and HS2-2 are also shown. The liner can include a notch such as the notch 300 which is circular in this embodiment to reduce weight.

[0032]

[0048] The rubber string RC is also shown for the second handle. A low-cost and easily available rubber string can be selected. Other elastic materials such as silicone, nitrile, vinyl, and neoprene can also be used. The rubber string prevents rattling when the weight is placed in the molding area of the handle scale. The weight may contact the rubber string. See also FIG. 12.

[0033]

[0049] Figure 4 is a view of the handle of FIG. 2 as seen from the front looking at free ends H1fe and H2fe, according to various embodiments. The shaping region SR1z of the handle scale HS1-2 is shown by a wavy edge SEz on the opposite side of the handle H1, similar to the shaping region SR1 of the handle scale HS1-1. The corresponding shaping region SR2z of the handle scale HS2-2 is also shown. In this embodiment, it should be noted that the two opposing handle scales of each handle can secure the weight, but other options are possible. For example, only one of the two opposing handle scales of each handle may have a shaping region for securing the weight.

[0034]

[0050] Figure 5 is a simplified isometric view of the handle of FIG. 1 according to various embodiments. The handle is shown as a rectangle for simplicity. The first handle H1 includes a first handle scale HS1-1, a first liner L1-1, a spacer SP1, a second liner L1-2, and a second handle scale HS1-2. The first handle scale HS1-1 has an outer side HS1-1o (surface) and an inner side HS1-1i (surface). The second handle scale HS1-2 has an outer side HS1-2o and an inner side HS1-2i. The first handle extends in the longitudinal direction along a first longitudinal axis LA1.

[0035]

[0051] The second handle H2 includes a first handle scale HS2-1, a first liner L2-1, a spacer SP2, a second liner L2-2, and a second handle scale HS2-2. The first handle scale HS2-1 has an outer side HS2-1o and an inner side HS2-1i. The second handle scale HS2-2 has an outer side HS2-2o and an inner side HS2-2i. The second handle extends in length along a second longitudinal axis LA2.

[0036]

[0052] The Cartesian coordinate system shows the x, y, and z axes, where the x-axis is parallel to the longitudinal axis and the y and z axes are perpendicular to the x-axis as shown.

[0037]

[0053] Figure 6 is an isometric view of the handle scale HS1-1 of FIG. 5 according to various embodiments. The handle scale includes an inner HS1-1i and an outer HS1-1o. The forming region SR1 is on the inner side. Since other shapes can be used, in this embodiment, the forming region is shown as a rectangle for generality. The forming region can be a recessed region including a structure for securing one or more weights, as further described in connection with FIGS. 7-17.

[0038]

[0054] Figure 7 is a side view of an embodiment of the handle scale HS1-1 of FIG. 6. According to various embodiments, the forming region SR1a includes opposing wavy edges SE1 and wavy edge SE2 having a relatively large spacing Lp. Each weight is a disk having a width or diameter Ww. The wavy edges provide seven individual positions along the longitudinal axis LA1 where the weights can be secured. In this embodiment, two weights are used, but up to four weights can be accommodated. The spacing or distance between the individual positions is Lp. Each individual position can correspond, for example, to the midpoint of the curved wall at the wavy edge. The length of the forming region SR1a is Lsr.

[0039]

[0055] Figure 8 is a side view of an embodiment of the handle scale HS1-1 of FIG. 6. According to various embodiments, the forming region SR1a includes opposing wavy edges having a relatively small spacing Lp1 < Lp. The wavy edges provide nine individual positions along the longitudinal axis LA1 where the weights can be secured. In this embodiment, two weights are used. The spacing or distance between the individual positions is Lp1. With this spacing, the weights can be as close as possible and may abut each other. This maximizes the number of weights that can be used for the same length of the forming region SR1a. For example, in the embodiment of FIG. 7, five weights can be used instead of four weights.

[0040]

[0056] This is an embodiment in which at least one individual position (P1) among a plurality of individual positions (P1 - P9) is separated from an adjacent individual position (P2) among the plurality of individual positions by a distance Lp1 that is smaller than the width Ww of the weight along the length of the first handle scale.

[0041]

[0057] FIG. 9 is a side view of an embodiment of the handle scale HS1 - 1 of FIG. 6. According to various embodiments, two forming regions SR1a1 and SR1a2 having opposing waveform edges are provided. Forming region SR1a1 has opposing waveform edges SE1a and waveform edge SE1b, and forming region SR1a2 has opposing waveform edges SE2a and waveform edge SE2b. In this approach, for example, more weight can be placed in SR1a1 than in SR1a2, so the weight distribution in the Z - direction and X - direction of the handle can be adjusted. In this embodiment, there are three weights in SR1a1 and one weight in SR1a2. Further, the waveform edges provide 13 individual positions for positioning the weights, and the spacing between adjacent individual positions is Lp2. The two forming regions extend parallel to each other.

[0042]

[0058] FIG. 10 is a side view of an embodiment of the handle scale HS1 - 1 of FIG. 6. According to various embodiments, the forming region SR1a has a waveform edge SE1 on one side and a straight edge 1000 having a rubber string RC on the other side. This embodiment, for example, corresponds to FIG. 3. The rubber string may be attached to the edge 1000 with an adhesive, for example, to avoid it being lost when the user removes the handle scale. Alternatively, the rubber string can be freely exchanged or removed. For example, the user may wish to use a wider string when smaller diameter weights are used. The user may also wish to use multiple rubber strings within the forming region. The string can have a circular or other cross - sectional shape.

[0043]

[0059] Figure 11 is a side view of an embodiment of the handle scale HS1-1 of FIG. 6. According to various embodiments, the shaping region SR1a has posts 1100 to 1106 on which weights can be mounted. In one approach, the posts may be cylindrical. In one approach, the diameter of each post is slightly smaller than the diameter of the hole in the center of each circular weight. Weights W1 and W2 are mounted or fixed to posts 1100 and 1102, respectively. Lpost refers to the spacing between the posts, which is the distance between individual positions where weights can be secured. Although not shown, rubber cords can be used as well.

[0044]

[0060] Figure 12 is a side view of an embodiment of the handle scale HS1-1 of FIG. 6. According to various embodiments, the shaping region SR1a has posts 1200 - 1207 for fixing weights. In this approach, the posts contact the periphery of the disk-shaped weights to prevent or limit movement along the longitudinal axis. In this approach, since there is no need to drill a hole in the center of the weight, loss of the weight when drilling a hole is avoided. A potential drawback is that there are fewer individual positions for securing weights. In this embodiment, weight W1 is secured between post 1200 and post 1201, weight W2 is secured between post 1202 and post 1203, and weight W3 is secured between post 1204 and post 1205, respectively. In this embodiment, a rubber cord RC is also used.

[0045]

[0061] Figure 13 is a side view of an embodiment of the handle scale HS1-1 of FIG. 6. According to various embodiments, the shaping region SR1a allows movement of the weights along the longitudinal axis (LA1). Weight W1 can move along the length Lsr of the shaping region. The weights can, for example, slide or rotate within the shaping region. This approach not only provides an interesting sound but also has the potential to change the dynamic quality of the handle.

[0046]

[0062] Figure 14 is a side view of an embodiment of the handle scale HS1-1 of FIG. 6. According to various embodiments, the rubber layer (RL) secures the weights. When the handle scales are secured to their respective liners by screws, the rubber layer presses against weights W1 and W2 to hold them in place, thus preventing movement along the longitudinal axis. This approach advantageously allows the weights to be placed at any position within the molding area. Thus, the position of the weights can be adjusted infinitely. The weights are not limited to being placed at individual positions indicated by the structure within the molding area. Optionally, the rubber layer is removable to provide the configuration of FIG. 13.

[0047]

[0063] Figure 15 is a side view of an embodiment of the handle scale HS1-1 of FIG. 6. The molding area SR1a, according to various embodiments, has tabs on one side for securing weights. Generally, removable weights can have different shapes. In this embodiment, the weights are rectangular and each has a notch to allow the weights to be secured to their respective tabs 1501 - 1507 at the edge 1500 of the formed area. For example, weights W1 and W2 each have notches 1510 and 1511, respectively, that allow them to be secured to tabs 1501 and 1503, respectively.

[0048]

[0064] Figure 16 is a side view of an embodiment of the handle scale HS1-1 of FIG. 6. The molding area SR1a, according to various embodiments, has notches on one side for securing weights. In this embodiment, the weights are rectangular and each has a tab that allows the weights to be secured to the respective notches 1601 - 1607 at the edge 1600 of the formed area. For example, weights W1 and W2 each have tabs 1610 and 1611, respectively, and these tabs each allow them to be secured within notches 1601 and 1603, respectively.

[0049]

[0065] FIG. 17 is a side view of an embodiment of the handle scale HS1-1 of FIG. 6. According to various embodiments, four rectangular regions SR1a1-SR1a4 can each secure a respective weight. In this embodiment, a weight W1 is secured in the forming region SR1a1 and a weight W2 is secured in the forming region SR1a2. The forming region SR1a1 and the forming region SR1a2 extend along the longitudinal axis LA1, and the forming region SR1a3 and the forming region SR1a4 extend along the longitudinal axis LA2. Other variations regarding the weights and the forming regions are similarly possible.

[0050]

[0066] In this embodiment, the forming regions are configured to secure weights of different sizes. For example, SR1a1 and SR1a2 are the first and second regions, respectively, and the first region is sized to secure a larger and heavier weight (W1) than the weight (W2) that can be secured by the second region.

[0051]

[0067] FIGS. 7-12 and FIGS. 15-17 show embodiments of a plurality of periodic retaining structures within a handle or handle shell for retaining one or more respective removable weights. In FIGS. 7-10, the retaining structure is a curved wall. In FIGS. 11 and 12, the retaining structure is a post. In FIG. 15, the retaining structure is a tab. In FIG. 16, the retaining structure is a notch. In FIG. 17, the retaining structure is a separated-shaped region or a recessed region.

[0052]

[0068] FIGS. 7-17 show embodiments of structures in a portion of a knife handle for retaining one or more removable weights within a range of positions along the length of the handle. For example, the range is defined by a length Lsr. In one approach, the range of positions extends between the midpoint MP of the handle and the free end H1fe or free end H2fe of the handle (see FIG. 1). That is, the range of positions can be limited to the second half of the handle where the dynamic quality is most affected.

[0053]

[0069] The distance between individual positions where weights can be secured may be uniform or non-uniform.

[0054]

[0070] The forming area is shown to be inside the handle shell, but other options are possible. For example, a liner can be formed or the forming area can be attached to the liner, in which case the handle shell is attached to cover this forming area.

[0055]

[0071] FIG. 18 shows a single-handle fixed-blade knife with a handle scale having a forming area for holding weights, according to various embodiments. In contrast to a folding knife, a single-handle fixed-blade knife typically has a central tang to which the handle shells are attached on opposite sides, and no liner is used. In this example, the knife 1800 includes a blade 1805 having a sharp portion 1805a and a tang 1805b. The sharp portion and the tang may be formed from one continuous piece of metal. In this example, since the tang extends to the end of the knife, the knife has a full tang. The guard 1802 surrounds the blade and separates the pointed sharp portion from the tang. The first handle shell 1820 is attached to the first side 1805b1 of the tang, and the second handle shell 1810 is attached to the second opposite side 1805b2 of the tang. The first handle shell has an inner side 1820s having a forming area 1821 for holding one or more weights, and the second handle shell has an inner side 1810s having a forming area 1811 for holding one or more weights. The forming area is scalloped in this example, similar to the embodiments of FIGS. 7 and 8. As described above, any forming area or structure for holding weights in a predetermined position can be used.

[0056]

[0072] The handle shell and tang can include holes into which screws or other fasteners are inserted to hold the shell to the tang. For example, the first handle shell 1820 includes holes 1832 and 1833, the tang includes holes 1822 and 1823, and the second handle shell includes holes 1812 and 1813. Since the fasteners can be easily removed and reinstalled, the user can add, remove, or adjust the position of the weights.

[0057]

[0073] Although specific embodiments have been illustrated and described herein, it will be understood by those skilled in the art that a variety of alternative and / or equivalent embodiments or implementations calculated to achieve the same purpose may be used in place of the embodiments shown and described without departing from the scope. Those skilled in the art will readily understand that the embodiments can be implemented in a very wide variety of ways.

[0074] This application is intended to cover any adaptations or variations of the embodiments discussed herein. Accordingly, it is expressly intended that the embodiments be limited only by the claims and their equivalents.

Claims

1. In a knife, a blade, a handle attached to the blade, comprising: the handle includes a first liner and a first handle scale adapted to be secured to the first liner, the first handle scale has an inner side facing the first liner, and the inner side of the first handle scale has a molding area for securing a removable weight at a selected position along the length of the first handle scale.

2. The selected position is one of a plurality of individual positions along the length direction of the first handle scale. The knife according to claim 1.

3. At least one of the plurality of individual positions is separated from an adjacent one of the plurality of individual positions by a distance smaller than the width of the weight along the length of the first handle scale. The knife according to claim 2.

4. The molding area includes a plurality of holding structures spaced along the length of the first handle scale. Each holding structure of the plurality of holding structures corresponds to each of the plurality of individual positions. The knife according to claim 2.

5. The holding structure includes at least one of a tab, a post, or a notch. The knife according to claim 4.

6. The molding area includes a wavy edge having a plurality of curved walls. Each curved wall of the plurality of curved walls corresponds to each of the plurality of individual positions. The knife according to claim 2.

7. The wavy edge is on one side of the molding area, and the knife further includes a rubber string on the opposite side of the molding area for securing the weight. The knife according to claim 6.

8. The molding area is for securing a plurality of weights at different positions along the length of the first handle scale. The knife according to claim 1.

9. The weight secured at the selected position is a disk. The knife according to claim 1.

10. The first handle scale includes an outer side facing away from the first liner and a viewing port extending from the outer side to the inner side, and it is possible to see whether a weight is secured to the first handle scale at a location corresponding to the viewing port. The knife according to claim 1.

11. The handle includes a second liner, a spacer between the first liner and the second liner, and a second handle scale adapted to be secured to the second liner. The second handle scale includes an inner side facing the second liner, and the inner side of the second handle scale includes a shaped area for securing a weight at a selected position along the length of the second handle scale. The knife according to claim 1.

12. The shaped area includes a first area and a second area. The first area is sized to secure a weight heavier than the weight that can be secured by the second area. The knife according to claim 1.

13. The shaped area of the first handle scale includes a recessed area of the first handle scale. The knife according to claim 1.

14. The knife is a butterfly knife, and the knife further includes a second handle attached to the blade. The second handle includes respective liners and respective handle scales adapted to be secured to the respective liners. The respective handle scales include an inner side facing the respective liners, and the inner side of the respective handle scales includes a shaped area for securing a weight at a selected position among a plurality of different positions along the length of the respective handle scales. The knife according to claim 1.

15. The knife is a single-handle knife. The knife according to claim 1.

16. A liner and a handle shell adapted to be secured to the liner, comprising a knife handle, wherein the handle shell includes a structure for holding one or more removable weights within a range of positions along the length of the handle, and the range of positions extends between the midpoint of the handle and the free end of the handle. A knife handle.

17. The range of the position includes a plurality of distinct positions for securing the one or more removable weights, the knife handle according to claim 16.

18. The structure enables movement of the one or more removable weights at any position within the range of the position, the knife handle according to claim 16.

19. A blade, A first handle attached to the blade, A second handle attached to the blade, Comprising a butterfly knife, The first handle includes a structure for holding one or more respective removable weights within a range of positions along the length of the first handle, and the second handle includes a structure for holding one or more respective removable weights within a range of positions along the length of the second handle, a butterfly knife.

20. The first handle includes a plurality of periodic structures for holding the one or more respective removable weights, the butterfly knife according to claim 19.

21. The first handle includes a first liner and a first handle scale adapted to be secured to the first liner, The first handle scale includes an inner side facing the first liner, The inner side of the first handle scale has the plurality of periodic structures, the butterfly knife according to claim 20.

22. A blade having a sharp portion and a tang, A first handle scale adapted to be secured to a first side of the tang, A second handle scale adapted to be secured to a second side of the tang, Comprising a single handle fixed knife, The first handle scale includes an inner side facing the tang, and the inner side of the first handle scale includes a shaped region for securing a removable weight at a selected position along the length of the first handle scale, a single handle fixed knife.

23. The selected position is an individual position among a plurality of individual positions along the length of the first handle scale, the single handle fixed knife according to claim 22.

24. The shaped region includes a plurality of holding structures spaced along the length of the first handle scale, Each of the plurality of holding structures corresponds to a respective individual position among the plurality of individual positions, and is the single-handle fixed knife according to claim 23. **Claim 25** The forming region includes a corrugated edge having a plurality of curved walls, Each of the plurality of curved walls corresponds to a respective individual position among the plurality of individual positions, and is the single-handle fixed knife according to claim 23.

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