Height maintenance equipment

Abstract

A screw bit body capable of efficiently applying torque to a socket fastener is provided. The screw bit body includes a plurality of lateral support sidewalls, a first base, and a second base. The lateral support sidewalls are arranged radially around the rotational axis of the screw bit body, and each includes a first lateral edge, a second lateral edge, a first support surface, a second support surface, and an engagement recess. The engagement recess forms an additional gripping point to prevent slippage between the screw bit body and the socket fastener. The engagement recess extends vertically from the first base toward the second base into the screw bit body. The engagement recess includes a protrusion disposed between the first recess section and the second recess section.

Description

[Technical Field]

[0001] The present invention relates generally to tools designed for tightening or loosening fasteners, particularly bolts and nuts. More specifically, the present invention relates to a non-slip, multi-directional driver bit designed to prevent fasteners from being damaged or stripped during the removal or tightening process. [Background technology]

[0002] Hexagonal bolts, nuts, screws, and other similar threaded devices are used to secure and hold two or more components together by engaging complementary threads, known as internal threads. These fasteners typically consist of a cylindrical shaft with a threaded outer periphery and a head at one end. The external threads engage complementary internal threads in a hole or nut, securing the fastener in place and fastening the associated components together. The head is the part that receives the external torque force, allowing the fastener to rotate and thread into the internal threads. The head is specifically shaped so that an external tool, such as a wrench, can apply torque to rotate the fastener and engage the complementary internal threads to a predetermined degree. This type of fastener is simple, highly effective, inexpensive, and extremely common in modern construction.

[0003] One of the most common problems when using these types of fasteners (both male and female threads) is the tool slipping within the head or slipping / backing off the head. This is typically caused by a worn fastener or tool, corrosion, overtightening, or damage to the fastener's head. The present invention is directed to a driver bit design that virtually eliminates slippage. The design uses multiple segments that bite into the fastener's head, allowing for efficient torque transfer between the driver bit and the fastener head. The present invention eliminates the need for typical bolt extractors, which require unnecessary drilling and additional tools.

[0004] With the development of power drivers and drills, people have increasingly used power tools to apply the required twisting force to remove various fasteners. The present invention provides driver end bits with single or double driving ends that can apply torque to fasteners in both clockwise and counterclockwise directions, allowing for tightening and loosening of the fastener. Most driver end bits have a standardized 1 / 4-inch hex holder and come in a variety of configurations, including, but not limited to, square ends, hex ends, and star ends. [Brief explanation of the drawings]

[0005] [Figure 1] FIG. 1 is a perspective view of the present invention. [Figure 2] FIG. 10 is a perspective view of an alternative embodiment of the present invention. [Figure 3] FIG. 3 is a front view of the alternative embodiment of the present invention shown in FIG. 2. [Figure 4] FIG. 3 is a rear view of the alternative embodiment of the present invention shown in FIG. 2. [Figure 5] FIG. 10 is a perspective view of an alternative embodiment of the present invention. [Figure 6] FIG. 2 is a bottom perspective view of the present invention. [Figure 7] FIG. 10 is a perspective view of an alternative embodiment of the present invention. [Figure 8] FIG. 10 is a perspective view of an alternative embodiment of the present invention. [Figure 9] FIG. 9 is a front view of the alternative embodiment of the present invention shown in FIG. 8. [Figure 10] FIG. 10 is a perspective view of an alternative embodiment of the present invention. [Figure 11] FIG. 10 is a perspective view of an alternative embodiment of the present invention. [Figure 12] FIG. 10 is a perspective view of an alternative embodiment of the present invention. [Figure 13] 3 is a front view of another alternative embodiment of the present invention in relation to FIG. 2, in which the overall cross section of the engagement recess is triangular. [Figure 14]3 is a rear view of another alternative embodiment of the present invention in relation to FIG. 2, in which the overall cross section of the engagement recess is triangular. [Figure 15] 3 is a front view of another alternative embodiment of the present invention in relation to FIG. 2, in which the overall cross section of the engagement recess is triangular. [Figure 16] 16 is a front view of another alternative embodiment of the present invention, related to FIG. 15, in which different portions of the lateral support sidewalls are concave or convex. [Figure 17] 16 is a front view of another alternative embodiment of the present invention, related to FIG. 15, in which different portions of the lateral support sidewalls are convex or concave. [Figure 18] 16 is a front view of another alternative embodiment of the present invention, related to FIG. 15, showing engagement recesses defined between flat side walls. [Figure 19] 16 is a front view of another alternative embodiment of the present invention, related to FIG. 15, showing engagement recesses defined between flat side walls. [Figure 20] 16 is a front view of another alternative embodiment of the present invention, related to FIG. 15, showing engagement recesses defined between flat side walls. [Figure 21] 3 is a perspective view of another alternative embodiment of the present invention, related to FIG. 2, showing opposing bit bodies disposed at an angle to one another; FIG. [Figure 22] 16 is a front view of another alternative embodiment of the present invention, related to FIG. 15, showing engagement recesses defined between flat side walls. [Figure 23] FIG. 1 is a perspective view of an embodiment of the invention having two support surfaces with rounded intermediate sidewalls and angular engagement recesses. [Figure 24] FIG. 1 shows a front view of an embodiment of the invention having two support surfaces with rounded intermediate side walls and angular engagement recesses. [Figure 25] FIG. 1 is a perspective view of an embodiment of the invention having two support surfaces, with a flat intermediate sidewall and a rounded engagement recess. [Figure 26]FIG. 1 shows a front view of an embodiment of the invention having two reinforced surfaces with flat intermediate sidewalls and rounded engagement recesses. [Figure 27] FIG. 10 is a perspective view of an embodiment of the present invention having an oval engagement recess. [Figure 28] FIG. 10 is a front view of an embodiment of the present invention having an oval engagement recess. [Figure 29] FIG. 1 is a front view of the present invention in accordance with at least one embodiment. [Figure 30] FIG. 1 is a front view of the present invention in accordance with at least one embodiment. [Figure 31] FIG. 1 is a front view of the present invention in accordance with at least one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0006] All illustrations in the drawings are for the purpose of illustrating selected forms of the invention and are not intended to limit the scope of the invention.

[0007] The present invention relates generally to accessories for torque tools. More specifically, the present invention is a screw bit (also known as a driver bit) with a multi-directional grip. The present invention allows for higher torque to be applied to a fastener than a conventional driver bit of comparable size without damaging the fastener head or the bit tool. This is achieved by using multiple engagement points that effectively grip the fastener head. The screw bit of the present invention is applicable to a variety of torque tools, including, but not limited to, conventional drills, bit-mounted drivers, socket wrenches, and socket drivers.

[0008] In its simplest embodiment, referring to FIG. 1, the invention comprises at least one screw bit body 1 and an attachment body 19 . The screw bit body 1 is a shank for engaging a socket fastener, such as a socket screw or socket bolt, and applying torque to the socket fastener. The screw bit body 1 includes a plurality of lateral support sidewalls 2, a first base 14, a second base 15, and at least one engagement recess 8 (engagement recess). The at least one engagement recess 8 is a lateral notch formed in the at least one screw bit body 1 that distributes torsional forces applied during preferred use of the present invention, maximizing efficiency and minimizing wear. Generally, the screw bit body 1 is a prism made of high-strength metal. Each of the plurality of lateral support sidewalls 2 engages and grips a socket fastener, efficiently transferring torque from the torque tool to the socket fastener. The first base 14 and the second base 15 are positioned opposite each other along the plurality of lateral support sidewalls 2. Furthermore, the first base portion 14 (and therefore also the second base portion 15) is preferably arranged perpendicular to each of the plurality of lateral support side walls 2 to close and complete the cylindrical shape of the screw bit body 1.

[0009] More specifically, the first base portion 14 preferably includes a first base surface 26, which is flat and perpendicular to each support surface 5 of the plurality of lateral support sidewalls 2. The support surface 5 may further include a first portion 33. The first portion 33 is a portion of the support surface 5, disposed along the first distance 21, and adjacent to the first side edge 3. The attachment body 19 enables the present invention to be attached to an external torque tool and to apply a torque force to the socket fastener via the screw bit body 1. The attachment body 19 is centered around and axially aligned with the rotation axis 16 of the screw bit body 1, and is configured so that the rotation axis of the attachment body 19 and the rotation axis 16 of the screw bit body 1 are fully aligned. The attachment body 19 is also adjacently connected to the second base portion 15. The attachment body 19 preferably has a hexagonal cross-sectional shape to fit into a female mounting portion of an external torque tool. External torque tools include, but are not limited to, power drills, torque wrenches, air drills, socket drivers, and other similar torque tools. While the engagement recess 8 preferably combines curved and straight sections, it can be any shape, such as a partial circle, triangle, or rectangle, depending on the user's preference. Furthermore, each section of the engagement recess 8 may be straight, concave, or convex. Using these shapes alone or in combination can further improve the durability, safety, and functionality of the present invention depending on the application. In one example, the entire cross section 9 of at least one engagement recess 8 can be triangular. This configuration provides ample space for residual stress and excess material to be released during torque application, reducing stress on the engagement recess 8. Additionally, the triangular shape can be concave from the first side edge 3 to the second side edge 4, which allows stress generated during torsional force to converge within the engagement recess 8. In another example, the engagement recess 8 can include both curved and straight sections, which optimizes performance for different fastener shapes, materials, and stress levels during use. In one embodiment of the invention shown in Figures 27-28, the engagement recess 8 is elliptical in shape. A partial or semi-elliptical cross section has greater strength than other similar shapes such as a semicircular shape.In an elliptical configuration, the engagement recess 8 is shallower and wider than a semicircular configuration, providing additional strength at stress concentration points on the screw bit body 1 and support surface 5, especially when forces are applied near the side edges. In this embodiment, the first and second portions 33, 34 of the reinforcing surface may be collinear. As an alternative to an elliptical shape, the engagement recess 8 may be any combination of radius curves, straight line segments, and corners, such as a trapezoid. In a preferred embodiment, any combination of curves and straight lines that make up the engagement recess 8 connect at obtuse angles, resulting in an overall concave shape of the engagement recess.

[0010] Some embodiments are generally more advantageous in terms of leverage and resistance to mechanical wear during use. To this end, at least one engagement recess 8 is positioned a first distance 21 away from the first side edge 3 of the particular side wall 36, as shown in FIGS. 9 , 18 , 19 , 21 , and 22 . As a result, a gripping point is formed between the at least one engagement recess 8 and the support surface 5. A first portion 33 of the support surface 5 of the particular side wall 36 may be positioned along the first distance 21. In this manner, the first distance 21 may indicate an area including a portion of the first portion 33. A width distance 35 of the at least one engagement recess 8 may be positioned parallel to the support surface 5. With this configuration, the width distance 35 is parallel to the first distance 21. The width distance 35 may be greater than the first distance 21. This ensures that the at least one engagement recess 8 extends over a substantial portion of the effective area of ​​the support surface 5.

[0011] The first portion 33 of the present invention may have a variety of shapes that are considered advantageous under various stress conditions and usage patterns. To ensure the appropriate shape of the at least one engagement recess 8, the first portion 33 may have a shape selected from the group consisting of a straight shape, a concave shape, and a convex shape, as shown in Figures 14 to 17. Any of these shapes can provide optimal support during use and improve the service life of the present invention.

[0012] Further advantages may be obtained by adopting a more complex shape or configuration for the support surface 5. For this reason, the support surface 5 may further include a second portion 34, as shown in FIGS. 14 to 20 and 28. The second portion 34 is a portion of the support surface 5 disposed along the second distance 22 and is disposed adjacent to the second side edge 4 by the second distance 22. The at least one engagement recess 8 may be disposed at a position spaced apart from the second side edge 4 of the particular side wall 36 by the second distance 22. The second distance 22 indicates the distance between the at least one engagement recess 8 and the second side edge 4, opposite the first distance 21. The second portion 34 of the support surface 5 of the particular side wall 36 may be disposed along the second distance 22, and the second distance 22 may indicate an area including a portion of the second portion 34. The second portion 34 may have a shape selected from the group consisting of a straight shape, a concave shape, and a convex shape, which may optimally address potential mechanical fatigue of the present invention. Furthermore, at least one engagement recess 8 may be tapered in a direction perpendicular to the axis of rotation from a position adjacent to the first distance 21 or the second distance 22 toward the side edge. This configuration allows for optimal application of forces during rotational use of the present invention. The reinforcing surface geometric plane located adjacent to at least one engagement recess 8 along the support surface 5 is preferably collinear with the side edge geometric plane extending from the first side edge 3 to the second side edge 4. However, in some embodiments, the reinforcing surface geometric plane may be offset from the side edge geometric plane rather than being collinear with it.

[0013] In many cases, a user may wish to apply a torsional force to the internal external thread from a different angle. To allow for this, the second portion 34 of the support surface 5 of a particular side wall 36 may be arranged at a predetermined partial angle relative to the first portion 33 of the support surface 5 of the same particular side wall 36. This configuration allows for precise adaptation to different shapes of externally threaded holes and ensures that they are within the scope of the present invention.

[0014] The triangular profile may further comprise a plurality of vertices 27, as shown in Figure 15. The plurality of vertices 27 corresponds to a locus of points representing the corners of the triangular profile. Each of the plurality of vertices 27 may be a rounded corner. This configuration prevents stress concentrations at the vertices 27 without significantly reducing the space required to effectively mitigate fatigue effects.

[0015] In many cases, it is advantageous to be able to slightly modify the exact triangular profile depending on the strength of torsional stress and the shape of the bolt or fastener. To improve efficiency in such situations, the triangular profile may include multiple vertices 31 and a pair of extensions 32, as shown in Figures 16 and 17. The multiple vertices 31 correspond to a group of points representing the corners of the triangular profile. The multiple vertices 31 can be considered as two tip elements along the first side edge 3 and the second side edge 4 and one recessed bottom element. The recessed bottom element may be a straight line connected to the pair of extensions 32. The pair of extensions 32 refer to sides connecting the multiple vertices 31 and are disposed between the multiple vertices 31. Thus, the pair of extensions 32 connect the multiple vertices 31 to each other. The pair of extensions 32 may have a shape selected from the group consisting of a straight line, a concave shape, and a convex shape. The shape that can be selected for the multiple vertices 31, the pair of extensions 32, or the recessed bottom element may be a circular arc shape or an angular shape. This configuration allows the pair of extensions 32 to more easily adapt to different torsional stresses, preventing bit wear due to fatigue. Furthermore, the shape of the sides surrounding the triangular profile can be modified. To achieve this, as shown in FIGS. 16 and 17, the support surface 5 includes a first portion 33 and a second portion 34. The first portion 33 is disposed along a first distance 21 and adjacent to the first side edge 3. Additionally, the second portion 34 is disposed along a second distance 22 and adjacent to the second side edge 4. The shapes that can be selected for the first portion 33 and the second portion 34 may be arc-shaped or angular. In a particularly preferred configuration, the first portion 33 and the second portion 34 have opposite curvatures (one concave and the other convex), which optimally reduces the effects of cyclic stress in the present invention. The first side edge 3 and the second side edge 4 can also be further modified to form angular or arc-shaped sides.

[0016] 3 and 4, each of the plurality of lateral support sidewalls 2 includes a first side edge 3, a second side edge 4, and a support surface 5. The plurality of lateral support sidewalls 2 are radially arranged around the rotation axis 16 of the screw bit body 1 and form a geometric profile complementary to the shape of the socket fastener. The number of the plurality of lateral support sidewalls 2 can be varied to accommodate various socket fastener shapes and profiles. In one embodiment of the present invention, the number of the plurality of lateral support sidewalls 2 is six, resulting in a hexagonal geometric profile of the screw bit body 1. In another embodiment, the number of the plurality of lateral support sidewalls 2 is four.

[0017] The support surface 5 physically presses against the socket fastener, particularly against a side wall of the socket fastener's head. The first and second side edges 3 and 4 are positioned opposite each other across the support surface 5. When viewed from above or below, the first and second side edges 3 and 4 of each of the lateral support side walls 2 form corners of the screw bit body 1. The engagement recesses 8 extend normal to and inward from the support surface 5 of at least one specific side wall 36 of the lateral support side walls 2, forming additional gripping points (teeth) on the support surface 5. In another embodiment, the gripping points are formed by the engagement recesses 8 and an adjacent edge, which may be either the first or second side edge 3 or 4, particularly the edge closest to the engagement recess 8. Furthermore, the engagement recesses 8 extend within the screw bit body 1 from the first base 14 toward the second base 15. This provides additional gripping points along the length of the screw bit body 1, maximizing gripping engagement between the screw bit body 1 and the socket fastener. Therefore, the overall cross-section 9 of the engagement recess 8 is preferably parallel to the first and second bases 14, 15. In some embodiments of the present invention, at least one engagement recess 8 may be tapered from the first base 14 to the second base 15, as shown in FIG. 11 . In this embodiment, the engagement recess 8 may be tapered such that the triangular profile adjacent the first base 14 is larger than the triangular profile adjacent the second base 15. This allows the engagement recess 8 to be tailored to the user's needs and requirements. Referring to FIG. 3 , in one embodiment of the present invention, the overall cross-section 9 of the engagement recess 8 is a partial circular profile. Furthermore, this partial circular profile is concave in a direction from the first side edge 3 to the second side edge 4. The partial circular profile minimizes or eliminates high stress concentration points in the screw bit body 1, improving the overall tool life. 13 and 14, in another embodiment, the overall cross section 9 of the engagement recess 8 has a triangular profile, and furthermore, this triangular profile is concave in the direction from the first side edge 3 to the second side edge 4.The engagement recess 8 may also have other shapes, including, but not limited to, a partial or semi-square profile, a partial or semi-rectangular profile, a partial or semi-elliptical profile, a partial or semi-oval profile, and the like.

[0018] Referring to FIGS. 8 and 9, in one embodiment of the present invention, the overall cross-section 9 of the engagement recess 8 includes a curved portion 10 and a straight portion 11. In this embodiment, the invention is implemented as an extractor bit designed for removing damaged or broken fasteners, damaged rods, broken studs, and similar objects. The engagement recess 8 is uniquely shaped to form sharp engagement teeth that grip the corners of the socket fastener, drawing material from inside the fastener socket into the engagement recess 8 and providing superior gripping power compared to conventional tools that simply push material away. This is particularly evident in worn or damaged fastener sockets. More specifically, the curved portion 10 is a semicircular curve and is positioned adjacent to the first side edge 3. The curved portion 10 is adjacent to a first portion 33 of the support surface 5 of at least one specific side wall 36 and is located opposite the first side edge 3. This configuration allows the first portion 33 to effectively define the position of the curved portion 10 relative to the first distance 21. The straight portion 11 is located adjacent to the curved portion 10 and opposite the first portion 33. The straight portion 11 serves to guide a portion of the socket fastener and press it against the engaging teeth. To this end, the straight portion 11 extends from the curved portion 10 to the second side edge 4, specifically, starting from the curved portion 10 and terminating at the second side edge 4.

[0019] In another embodiment of the present invention, referring to FIG. 11, the engagement recess 8 is centrally positioned on the support surface 5. Specifically, the engagement recess 8 is offset from the second side edge 4 of at least one particular side wall 36 by a second distance 22. For this central positioning, the first distance 21 is equal to the second distance 22, as shown in FIG. 15. This positioning allows the engagement recess 8 to engage the inner side wall of the socket fastener, shifting torsional stresses to and from the corners of the fastener, improving gripping, preventing corner rounding of the fastener, and efficiently transmitting torque while minimizing the possibility of slippage. Furthermore, this embodiment allows the socket fastener to be rotated in both clockwise and counterclockwise directions. Additionally, in embodiments where the first distance 21 is equal to the second distance 22, as shown in FIGS. 19, 22, and 28, it may be desirable to alternately position multiple intermediate side walls 24 between at least one particular side wall 36.

[0020] In another embodiment of the present invention, the ratio of first distance 21, second distance 22, and the width of engagement recess 8 can be varied to achieve a clockwise-only or counterclockwise-only design. In one embodiment, when the present invention is configured as a clockwise drive bit, second distance 22 is greater than first distance 21. Specifically, a ratio of first distance 21, second distance 22, and the width of engagement recess 8 of 1:5:4 provides a structure that grips and torques a socket fastener in a clockwise direction. This design is used for driving and setting socket fasteners. In another embodiment, when the present invention is configured as a counterclockwise drive bit, first distance 21 is greater than second distance 22. Specifically, a ratio of first distance 21, second distance 22, and the width of engagement recess 8 of 5:1:4 provides a structure that grips and torques a socket fastener in a counterclockwise direction. This design is used for loosening and removing socket fasteners.

[0021] Referring to FIGS. 5 and 10, the present invention can also be implemented as a splined, square, or other polygonal bit design. More specifically, when the screw bit body 1 is a splined bit body, the splined bit body can transmit torque to a socket fastener via multiple protrusions. Therefore, as shown in FIGS. 18 to 22, the screw bit body 1 can further include a plurality of intermediate side walls 24. Each of the intermediate side walls 24 is a flat surface that engages with a socket fastener, similar to conventional screw bit designs. The intermediate side walls 24 are radially arranged around the rotation axis 16 and are alternately arranged between the lateral support side walls 2. The ratio of the lateral support side walls 2 to the intermediate side walls 24 can be varied, thereby achieving various screw bit designs. In one embodiment, the intermediate side walls 24 are alternately arranged radially with the lateral support side walls 2. In another embodiment, three intermediate side walls 24 are arranged between each lateral support side wall 2. This results in an engagement portion (teeth) being formed at intervals between the protrusions of the screw bit body 1.

[0022] In one embodiment, as shown in FIG. 10 , a first intermediate sidewall 28, a second intermediate sidewall 29, and a third intermediate sidewall 30 of the plurality of intermediate sidewalls 24 are positioned on corresponding lateral support sidewalls of the plurality of lateral support sidewalls 2. The first intermediate sidewall 28, the second intermediate sidewall 29, and the third intermediate sidewall 30 provide the necessary clearance to allow for effective fastener connection and prevent mechanical wear and fatigue of the components. The first intermediate sidewall 28 and the second intermediate sidewall 29 are positioned perpendicular to each other, forming a 90-degree angle that may be optimal for certain applications. The third intermediate sidewall 30 is positioned between the second intermediate sidewall 29 and at least one engagement recess 8 of the corresponding lateral support sidewall. Thus, the third intermediate sidewall 30 provides structural support for the at least one engagement recess 8 during preferred use of the present invention.

[0023] To enhance mechanical advantage and suitability, at least one engagement recess 8 may be provided in multiple configurations, and the engagement recess 8 may be formed in multiple side walls of at least one screw bit body 1. To achieve this, the at least one specific side wall 36 may be multiple specific side walls. This configuration allows the multiple specific side walls to be arranged in various patterns around the screw bit body 1. Furthermore, the at least one engagement recess 8 may be multiple engagement recesses. In this manner, each specific side wall can be appropriately configured with a shape having the engagement recess 8. Finally, each of the multiple engagement recesses 8 is formed to extend normal to and inward from the support surface 5 of the corresponding specific side wall. Therefore, each specific side wall can be machined into a concave shape or other desired shape by one of the multiple engagement recesses 8.

[0024] To address this issue, the plurality of lateral support sidewalls may further include at least one flat sidewall 37. The flat sidewall 37 refers to a sidewall among the plurality of lateral support sidewalls 2 that does not have a specific recessed structure. The flat sidewall 37 may be disposed adjacent to at least one specific sidewall 36. This allows a flat sidewall to be disposed between the sidewalls of each specific sidewall 36, thereby realizing a variety of configurations of sidewalls with recesses and flat sidewalls.

[0025] In another embodiment of the present invention, referring to FIG. 6 , the present invention further includes an engagement bore 20. The engagement bore 20 allows the present invention to be attached to a male attachment portion of an external torque tool, such as a socket wrench or screwdriver. The engagement bore 20 extends into the attachment body 19 along the axis of rotation, opposite the screw bit body 1. The engagement bore 20 is shaped to receive the male attachment portion of the socket wrench, and a preferred shape is square, since the majority of socket wrenches have square attachment portions. In this embodiment, the preferred attachment body 19 is cylindrical. In other embodiments, the shape and design of the engagement bore 20 and the attachment body 19 can be modified to accommodate different torque tool designs and different attachment means.

[0026] Referring to FIG. 2 , one embodiment of the present invention is configured as a double-ended screw bit, allowing both clockwise and counterclockwise configurations to be simultaneously provided within a single tool. In this embodiment, the at least one screw bit body 1 includes a first screw bit body 17 and a second screw bit body 18. The attachment body 19 preferably has a hexagonal cross-sectional shape. The attachment body 19 is centered around and axially aligned with the rotation axis 16 of the first screw bit body 17, and is configured so that the rotation axis of the attachment body 19 and the rotation axis 16 of the first screw bit body 17 perfectly coincide with each other. Furthermore, the attachment body 19 is connected adjacent to the second base 15 of the first screw bit body 17. The second screw bit body 18 shares the attachment body 19 with the first screw bit body 17. Therefore, the second screw bit body 18 is concentrically arranged with the first screw bit body 17. Additionally, the second screw bit body 18 is positioned adjacent to the attachment body 19 on the opposite side from the first screw bit body 17, similar to a conventional double-ended screw bit design. Like the first screw bit body 17, the attachment body 19 is connected to the second base 15 of the second screw bit body 18. The first screw bit body 17 is designed for screwing socket fasteners, i.e., in a clockwise configuration. To this end, referring to FIG. 3 , the second distance 22 of the first screw bit body 17 is greater than the first distance 21, and this configuration positions an additional gripping point of the first screw bit body 17 adjacent the first side edge 3 of the first screw bit body 17. The second screw bit body 18 is designed for loosening / removing socket fasteners, i.e., in a counterclockwise configuration. Referring to FIG. 4 , the first distance 21 of the second screw bit body 18 is greater than the second distance 22, and this configuration positions an additional gripping point of the second screw bit body 18 adjacent to the second side edge 4 of the second screw bit body 18.

[0027] In yet another embodiment, a double-ended screw bit may benefit from being positioned or oriented with a curve between the first screw bit body 17 and the second screw bit body 18. Such a configuration is commonly found in hex wrenches and similar wrench tools. To this end, the second screw bit body 18 may be oriented at an angle 38 relative to the first screw bit body 17, as shown in FIG. 21 . This configuration allows a user to use the first screw bit body 17 as a handle while using the second screw bit body 18 to turn an external screw.

[0028] Referring to FIG. 5 , in another embodiment of the present invention, at least one engagement recess 8 includes a first recess section 12 and a second recess section 13. This embodiment provides an alternative configuration for both clockwise and counterclockwise rotation. Specifically, the first recess section 12 and the second recess section 13 are parallel to and offset from one another. The first recess section 12 is adjacent to and offset from the first side edge 3, and the second recess section 13 is adjacent to and offset from the second side edge 4. This configuration allows the user to rotate the present invention in either a clockwise or counterclockwise direction without removing it from the torque tool and provides an additional gripping point. The first recess section 12 and the second recess section 13 may intersect or be offset from one another. An intermediate support surface 53 is formed between or at the intersection of the first recess section 12 and the second recess section 13. The intermediate support surface 53 may, but need not, be collinear with the support surface 5. The present invention is not limited to the first recess section 12 and the second recess section 13, and in some embodiments, at least one engagement recess 8 may include more recess sections in addition to the first recess section 12 and the second recess section 13. In this embodiment, it is preferable to have a configuration in which multiple intermediate side walls 24 are alternately arranged between multiple lateral support side walls 2. This configuration results in multiple triangular profiles lined up along the multiple lateral support side walls 2. Such an embodiment makes the present invention more adaptable to various high-stress applications.

[0029] Referring to FIG. 7 , in another embodiment, the present invention is configured as a ball-end screw bit. In this embodiment, the support surface 5 of each of the multiple lateral support sidewalls 2 includes a protrusion 6 and a recess 7. The protrusions 6 and recesses 7 form a curved surface, and the multiple lateral support sidewalls 2 as a whole form a spherical shape. The protrusions 6 are disposed adjacent to the first base 14, and each of the protrusions 6 of the multiple lateral support sidewalls 2 forms a main portion of the spherical shape. The recesses 7 are disposed adjacent to the protrusions 6 and opposite the first base 14, and each of the recesses 7 of the multiple lateral support sidewalls 2 forms the remaining portion of the spherical shape, providing relief when the screw bit body 1 engages a socket fastener at an angle. The protrusions 6 and recesses 7 are oriented along the rotation axis 16 of the screw bit body 1, i.e., along the length of the screw bit body 1, and are configured so that the spherical shape is located at the end of the screw bit body 1. The curvature, length, and height of the recesses 7 and the protrusions 6 are preferably identical. Furthermore, the engagement recesses 8 preferably extend the entire length of the protrusions 6 and recesses 7. This provides additional gripping capability across the entire screw bit body 1 regardless of the angle between the socket fastener and the screw bit body 1.

[0030] Referring to FIG. 10 , in one embodiment of the present invention, the present invention is configured as a tamper-resistant screw bit. Specifically, the present invention further includes a security pin hole 23 that engages with a corresponding post in a dedicated socket fastener. This ensures a tamper-resistant design by selling, using, or manufacturing a set of a dedicated socket fastener and a dedicated keyed screw bit. This type of engagement structure is used for security reasons to prevent unauthorized access to a specific socket fastener. The security pin hole 23 is positioned concentrically with the rotation axis 16 of the screw bit body 1. Furthermore, the security pin hole 23 extends from the first base portion 14 into the screw bit body 1. The size, depth, and shape profile of the security pin hole 23 can be modified according to user needs and specifications.

[0031] Referring to FIG. 11 , in one embodiment of the present invention, additional features are provided to guide the screw bit body 1 into the socket fastener. Specifically, the side edges 25 between the first base 14 and each of the plurality of lateral support side walls 2 are chamfered, allowing the user to easily engage the screw bit body 1 into the socket fastener. Referring to FIG. 12 , in another embodiment, the present invention is implemented with a different design. In this embodiment, the screw bit body 1 tapers from the second base 15 toward the first base 14. The degree of taper can be varied according to the user's needs and requirements. Furthermore, in another embodiment shown in FIG. 22 , the present invention provides a screw bit body tapered from the second base 15 toward the first base 14, in which at least one specific side wall 36 is tapered and at least one adjacent flat side wall 37 is similarly tapered. In other words, as shown in FIG. 22 , the at least one specific side wall 36 and the at least one flat side wall 37 are not perpendicular to the first base 14. Additionally, some embodiments are particularly advantageous in terms of leverage and resistance to mechanical wear during use. To this end, as shown in FIG. 22 , at least one engagement recess 8 is positioned a first distance 21 away from the first side edge 3 of at least one particular side wall 36. As a result, a gripping point is formed between the at least one engagement recess 8 and the support surface 5. A first portion 33 of the support surface 5 of the at least one particular side wall 36 may be positioned along the first distance 21. This allows the first distance 21 to indicate an area that includes a portion of the first portion 33. Furthermore, a width distance 35 of the at least one engagement recess 8 may be positioned parallel to the support surface 5, and this configuration makes the width distance 35 parallel to the first distance 21. The width distance 35 may be greater than the first distance 21, thereby ensuring that the at least one engagement recess 8 spans a substantial portion of the effective area of ​​the support surface 5.

[0032] The first portion 33 of the present invention may have a variety of shapes that are considered advantageous under various stress conditions and usage patterns. To ensure the appropriate shape of the at least one engagement recess 8, the first portion 33 may have a shape selected from the group consisting of linear, concave, and convex, as shown in Figures 14 to 17. Any of these shapes can provide optimal support during use and improve the service life of the present invention.

[0033] The support surface 5 may have a more complex shape or configuration to provide additional benefits. For this reason, as shown in FIG. 22 , the support surface 5 may further include a second portion 34. The second portion 34 is a portion of the support surface 5 that is disposed along the second distance 22 and is adjacent to the second side edge 4 by the second distance 22. The at least one engagement recess 8 may be disposed at a position spaced apart from the second side edge 4 of the at least one particular side wall 36 by the second distance 22. The second distance 22 indicates the distance between the at least one engagement recess 8 and the second side edge 4, opposite the first distance 21. The second portion 34 of the support surface 5 of the particular side wall 36 may be disposed along the second distance 22, and the second distance 22 may indicate an area that includes a portion of the second portion 34. The second portion 34 may have a shape selected from the group consisting of a straight shape, a concave shape, and a convex shape, which can optimally address potential mechanical fatigue in the present invention. Furthermore, at least one engagement recess 8 may be tapered in a direction perpendicular to the axis of rotation from a position adjacent to the first distance 21 or the second distance 22 toward the side edge. This configuration allows for optimal force application during rotational use of the present invention. The length of the first distance 21 may be equal to or different from the length of the second distance 22. The reinforcing surface geometric plane located adjacent to at least one engagement recess 8 along the support surface 5 is preferably collinear with the side edge geometric plane extending from the first side edge 3 to the second side edge 4. However, as shown in FIG. 22 , in some embodiments, the support surface geometric plane may be offset from the side edge geometric plane rather than collinear with it. The width distance of the flat side wall 37 may be less than, equal to, or greater than the width distance of the specific side wall 36. Furthermore, the widths of the first portion 33 and the second portion 34 may taper from the first base 14 to the second base 15. 22, in one embodiment of the present invention, the cross section 9 of the engagement recess 8 preferably has a partial circular profile. Furthermore, this partial circular profile is concave in a direction from the first side edge 3 to the second side edge 4. The partial circular profile results in few or no high stress concentration points on the screw bit body 1, which can improve the overall service life of the tool.In a preferred embodiment, the support surface 5 of at least one particular side wall 36 is connected to the support surface 5 of at least one flat side wall 37 at an obtuse angle. The attachment body 19 allows the present invention to be attached to an external torque tool, thereby applying a torque force to the socket fastener via the screw bit body 1. The attachment body 19 is centered axially around and around the rotation axis 16 of the screw bit body 1, and is configured so that the rotation axis of the attachment body 19 and the rotation axis 16 of the screw bit body 1 are fully aligned. The attachment body 19 is also connected adjacent to the second base 15.

[0034] In many cases, users may wish to apply torsional force to the internal thread of an external thread from different angles. To achieve this, as shown in FIG. 22, the second portion 34 of the support surface 5 of at least one particular side wall 36 may be positioned at a predetermined angle relative to the first portion 33 of the support surface 5 of the same particular side wall 36. This configuration allows for precise adaptation to different shapes of externally threaded holes while still remaining within the scope of the present invention. As with the previously described embodiments of the present invention, as shown in FIGS. 23 to 26, the height retention device includes at least one screw bit body 1 and an attachment body 19. The at least one screw bit body 1 may include a plurality of lateral support side walls 2, a plurality of intermediate side walls 24, a first base 14, and a second base 15. The plurality of lateral support side walls 2 and the plurality of intermediate side walls 24 may be radially arranged in any number around the rotation axis 16 of the at least one screw bit body 1, with an example six-sided configuration being shown in FIGS. 23 to 26. Each of the multiple lateral support side walls 2 includes a first side edge 3, a second side edge 4, at least one support surface 5, and at least one engagement recess 8. The first side edge 3 and the second side edge 4 are located at opposite ends of the lateral support side wall 2, and the at least one engagement recess 8 extends from the first base portion 14 toward the second base portion 15 within the at least one screw bit body 1. In a preferred embodiment, the at least one engagement recess 8 is rounded with a single radius or multiple radii (see FIGS. 25-26 ). Alternatively, as shown in FIGS. 23-24 , the engagement recess 8 may be angular, including multiple corners 63. In a preferred embodiment, the first base portion 14 is flat, but in other embodiments, it may be rounded or pointed.

[0035] Referring to the above embodiment, the support surface 5 includes a first support surface 51 and a second support surface 52. The first support surface 51 may be disposed adjacent to the first side edge 3, and the second support surface 52 may be disposed adjacent to the second side edge 4. At least one engagement recess 8 is disposed between the first support surface 51 and the second support surface 52, with the first support surface 51 connecting the engagement recess 8 to the first side edge 3 and the second support surface 52 connecting the engagement recess 8 to the second side edge 4. The engagement recess 8 forms a concave shape with the first support surface 51 and the second support surface 52. Unlike many prior embodiments of the present invention, the first support surface 51 and the second support surface 52 are not collinear with each other but are offset, and the first side edge 3 and the second side edge 4 are the points on each of the plurality of lateral support sidewalls 2 that are furthest from the rotation axis 16. The first width distance 64 is measured as the distance from the first side edge 3 to the second side edge 4 across the engagement recess 8. Meanwhile, the second width distance 65 is measured from the first side edge 3 to the second side edge 4 across the intermediate side wall 24. In a preferred embodiment, the first width distance 64 is greater than the second width distance 65.

[0036] Specifically, the first support surface 51 and the second support surface 52 are disposed at a support angle 61 relative to the plurality of intermediate side walls 24. The support angle 61 refers to the interior angle formed between the first support surface 51 or the second support surface 52 and one of the plurality of intermediate side walls 24 in any cross section 9 parallel to the first base 14 and the second base 15. When the plurality of intermediate side walls 24 are convex or concave, the support angle 61 is defined as the angle between the first support surface 51 or the second support surface 52 and an imaginary side wall plane 62 connecting the first side edge 3 and the second side edge 4 along the side wall of the plurality of intermediate side walls 24. In a preferred embodiment, the support angle 61 is an obtuse angle, but the support angle 61 may also be an acute angle or a right angle.

[0037] 23 to 26, the intermediate side walls 24 may be flat, convex, or concave. Similarly, the first support surface 51 and the second support surface 52 may also be flat, convex, or concave. In a preferred configuration, the first side edge 3 and the second side edge 4 are angular, but they may also be radial. The first side edge 3 and the second side edge 4 may also have sharp corners or may be rounded. In a preferred configuration, the screw bit body 1 tapers from the first base 14 to the second base 15. This taper may be present for all features of the screw bit body 1, or may be present only for selected features. The intermediate side walls 24 may taper diametrically from the first base 14 to the second base 15, such that the distance from the rotation axis 16 at the first base 14 is smaller than the distance at the second base 15. The first bearing surface 51, the second bearing surface 52, and the at least one engagement recess 8 may also taper, either collectively or individually, from the first base 14 toward the second base 15. Additionally, the plurality of intermediate side walls 24, the first bearing surface 51, the second bearing surface 52, and the at least one engagement recess 8 may each be laterally tapered, in which case the width of each feature is smaller at the first base 14 than at the second base 15. Overall, in a preferred configuration, the overall diameter of the screw bit body 1 is smaller at the first base 14 than at the second base 15.

[0038] As previously mentioned, the present invention is not limited to a particular number of side walls. While Figures 23-26 show an example configuration having six lateral support side walls 2 and six intermediate side walls 24, configurations having other numbers of side walls are acceptable within the present invention. While the four-sided and six-sided configurations are most preferred because they best accommodate engagement with standard fasteners, other configurations are also acceptable within the present invention. However, in any configuration, the number of the plurality of lateral support side walls 2 and the number of the plurality of intermediate side walls 21 preferably match.

[0039] 27 and 28, in this embodiment, at least one engagement recess 8 is formed in an elliptical, semi-elliptical, or partial elliptical shape. As in the previously described embodiments, the engagement recess 8 is positioned by a first distance 21 from the first side edge 3 and a second distance 22 from the second side edge 4. In a preferred configuration, the first distance 21 and the second distance 22 are equal, thereby positioning the engagement recess 8 approximately centered between the side edges. In another configuration, the engagement recess 8 may be intentionally offset from the center by setting the first distance 21 greater or less than the second distance 22. Also, due to manufacturing tolerances, these distances may not be perfectly equal. Compared to a semicircular profile, a partial elliptical or semi-elliptical profile provides a greater width distance 25 while reducing the depth of cut into the screw bit body 1. This shape improves the structural strength of the screw bit body 1, particularly at and near the side edges. Also, as with other embodiments, the profile of the engagement recess 8 may be formed using a combination of straight, angular or curved sections, thereby achieving an elongated recess shape with width distance and depth characteristics equivalent to an elliptical configuration.

[0040] In a preferred configuration of the embodiment shown in FIGS. 27 and 28 , at least one engagement recess 8 includes a recess bottom 71, a first connecting portion 72, and a second connecting portion 73. The recess bottom 71 is connected to the support surface 5 on one side adjacent to the first side edge 3 via the first connecting portion 72. The recess bottom 71 is connected to the support surface 5 on the opposite side from the first connecting portion 72, adjacent to the second side edge 4 via the second connecting portion 73. The first connecting portion 72 and the second connecting portion 73 are preferably formed in a concave or flat shape, allowing the fastener material to displace into the at least one engagement recess 8 when the engagement portion bites into the fastener. This allows the present invention to generate greater gripping force and torque on the fastener without causing the fastener to roll up or slip off the fastener.

[0041] 27 and 28, the first side edge 3 and the second side edge 4 are each acute corners at the intersection of the support surface 5 of any lateral support sidewall and the adjacent lateral support sidewall. An edge angle 70 is measured at the first side edge 3 and the second side edge 4 and represents the internal angle between the support surface 5 of any lateral support sidewall and the adjacent lateral support sidewall. The edge angle 70 is preferably 120 degrees or 90 degrees, depending on the number of lateral support sidewalls, although other angle dimensions can be used. Furthermore, in each of the multiple lateral support sidewalls 2, the intersection of the first connection portion 72 and the support surface 5 and the intersection of the second connection portion 73 and the support surface 5 are each formed by an acute edge. A small radius (R) may be provided at each of the acute corners for manufacturing purposes while maintaining the sharp edge.

[0042] In the embodiment shown in FIGS. 27 and 28, the at least one engagement recess 8 may comprise a first recess section 12 and a second recess section 13. This embodiment is an alternative configuration that maintains the clockwise and counterclockwise configuration even when the at least one engagement recess 8 is offset from the center of the lateral support sidewall 2. In particular, the first recess section 12 and the second recess section 13 are disposed parallel to one another. The first recess section 12 is positioned adjacent to and offset from the first side edge 3, and the second recess section 13 is positioned adjacent to and offset from the second side edge 4. This provides the user with multiple additional engagement points and allows the device to be rotated in either a clockwise or counterclockwise direction. The first recess section 12 and the second recess section 13 may intersect or be offset from one another. An intermediate support surface 53 is defined between or at the intersection of the first recess section 12 and the second recess section 13. The intermediate support surface 53 may, but need not, be collinear with the support surface 5. The present invention is not limited to the first recessed section 12 and the second recessed section 13, and some embodiments may include more recessed sections in addition to the first recessed section 12 and the second recessed section 13.

[0043] 29 to 31 , at least one engagement recess 8 includes a plurality of recess sections 800 and at least one protrusion 83, and the at least one protrusion 83 can be disposed between the plurality of recess sections 800. The plurality of recess sections 800 are concave, and the at least one protrusion 83 is convex, distinguishing them within the at least one engagement recess 8. In a preferred embodiment, the plurality of recess sections 800 includes a first recess section 81 and a second recess section 82, and the at least one protrusion 83 is disposed between the first recess section 81 and the second recess section 82. The at least one protrusion 83 has the effect of providing additional strength to the screw bit body 1. It is generally known that adding mass or material, such as a protrusion, improves the strength of the screw bit body 1. Furthermore, providing the at least one protrusion 83 within the engagement recess 8 can prevent a user from accidentally using the present invention (the configuration shown in FIGS. 29 to 31 ) with an inappropriate fastener. Examples include Torx fasteners (also known as Star fasteners) and Torx Plus fasteners (also known as Star Plus fasteners). The configurations of Figures 29-31 of the present invention are designed for use with hex socket fasteners; use with an inappropriate fastener can damage both the fastener and the tool and negate the benefits of the anti-slip engagement described in the present invention. The addition of at least one protrusion 83 to the engagement recess 8 eliminates the common problem of misapplication of an incompatible hexalobular fastener. As with the other embodiments described above, the first support surface 51 may be located adjacent to the first side edge 3, and the second support surface 52 may be located adjacent to the second side edge 4. The first side edge 3 and the second side edge 4 may be acute, rounded, or obtuse. At least one engagement recess 8 including a first recess section 81, a second recess section 82, and at least one protrusion 83 is disposed between the first support surface 51 and the second support surface 52. The at least one engagement recess 8 is not limited to the first recess section 81 and the second recess section 82, and may include any number of recess sections.Similarly, while the preferred embodiment includes a single at least one protrusion 83, it is within the scope of the present invention to provide multiple protrusions. In a preferred embodiment, the at least one protrusion 83 is disposed between the first recessed section 81 and the second recessed section 82, with the first recessed section 81 disposed adjacent to the first support surface 51 and located opposite the first side edge 3, and the second recessed section 82 disposed adjacent to the second support surface 52 and located opposite the second side edge 4. The shapes of the first recessed section 81 and the second recessed section 82 may be arc-shaped or angular, including, but not limited to, partial circles, triangles, rectangles, or combinations of angular and curved shapes. Furthermore, the shape of each portion of the at least one engagement recess 8 may be selected from the group consisting of linear, concave, and / or convex. Using these shapes alone or in combination can further improve the durability, safety, and functionality of the present invention depending on the application. Similarly, the shape of the at least one protrusion 83 may be rounded, pointed, flat, or any shape selected from the group consisting of straight, concave, and / or convex, either alone or in combination.

[0044] For each of the multiple lateral support side walls 2, a mid-plane 84 can be defined at any cross section 9 parallel to the first base 14 and the second base 15. The mid-plane 84 is a reference plane parallel to the first support surface 51 and passing through the rotation axis 16. The protrusion distance 85 is defined as the maximum distance between the at least one protrusion 83 and the mid-plane 84 in a direction perpendicular to the mid-plane. The support distance 86 is defined as the minimum distance between the first support surface 51 and the mid-plane 84. In a preferred embodiment, the protrusion distance 85 is smaller than the support distance 86. However, in other embodiments, the protrusion distance 85 may be equal to the support distance 86, or the protrusion distance 85 may be greater than the support distance 86.

[0045] Further, a support plane 87 may be defined that is parallel to the first support surface 51 and perpendicular to the first base 14. A first recess depth 88 is defined as the maximum distance from the support plane 87 to the first recess section 81 in a direction parallel to the support plane 87. A second recess depth 89 is defined as the maximum distance from the support plane 87 to the second recess section 82 in a direction parallel to the support plane 87. Further, a recess length 80 is defined as the shortest distance from the first support surface 51 to the second support surface 52 across at least one engagement recess 8. Additionally, a first recess length 801 is defined as the shortest distance from the first support surface 51 to the protrusion 83 across the first recess section 81, and a second recess length 802 is defined as the shortest distance from the second support surface 52 to the protrusion 83 across the second recess section 82. In preferred embodiments, recess length 80 is greater than first recess depth 88, and recess length 80 is greater than second recess depth 89. In some embodiments, first recess length 801 can be shorter, longer, or equal to first recess depth 88, and second recess length 802 can be shorter, longer, or equal to second recess depth 89. First recess depth 88 is preferably equal to second recess depth 89, although in some embodiments first recess depth 88 can be greater or less than second recess depth 89.

[0046] As shown in FIGS. 29 to 31 , similar to the above-described embodiment, the bit body 1 may further include a plurality of intermediate side walls 24. Each of the intermediate side walls 24 has a flat surface that engages with a socket fastener, similar to a conventional bit shape. The intermediate side walls 24 are arranged radially around the rotation axis 16. Furthermore, the intermediate side walls 24 are arranged between the lateral support side walls 2. The ratio of the lateral support side walls 2 to the intermediate side walls 24 can be varied to achieve various different bit shapes. In one embodiment, the intermediate side walls 24 and the lateral support side walls 2 are arranged alternately in the rotational direction. In another embodiment, three intermediate side walls 24 are arranged between each lateral support side wall 2. This results in a configuration in which engagement portions (teeth) are arranged alternately for each protrusion on the bit body 1.

[0047] In another embodiment, the present invention may be embodied as a socket for tightening or loosening bolts or other similar fasteners, in which case the bit body 1 is configured as a recess extending into a cylinder, similar to a conventional socket shape.

[0048] While the present invention has been described in connection with preferred embodiments thereof, it should be understood that many other modifications and variations can be made therein without departing from the spirit and scope of the invention as set forth in the following claims.

Claims

1. An altitude holding device, at least one screw bit body; the at least one screw bit body includes a plurality of lateral support sidewalls; each of the plurality of lateral support side walls includes a first side edge, a second side edge, a first support surface, a second support surface, and at least one engagement recess; the plurality of lateral support side walls are radially disposed about an axis of rotation of the at least one screw bit body; The first side edge and the second side edge are disposed opposite each other with the lateral support side wall interposed therebetween, The at least one engagement recess is formed in the screw bit body and extends in a normal direction; the at least one engagement recess comprises a plurality of recess sections and at least one protrusion, each of the plurality of recess sections being concave and the at least one protrusion being convex; the at least one protrusion is disposed between the plurality of recessed sections. An altitude holding device characterized by:

2. The altitude holding device according to claim 1, further comprising: a mid-plane located on a cross section of the at least one screw bit body, for each of the plurality of lateral support side walls; the intermediate plane is parallel to the first support surface; the mid-plane passes through the axis of rotation; a protrusion distance is a maximum distance between the protrusion and the intermediate plane in a direction perpendicular to the intermediate plane; The shortest distance between the support surface and the intermediate plane is defined as a support distance. An altitude holding device characterized by:

3. 3. The altitude holding device according to claim 2, wherein the protruding distance is equal to the support distance.

4. 3. The altitude holding device according to claim 2, wherein the protruding distance is greater than the support distance.

5. 3. The altitude holding device according to claim 2, wherein the protruding distance is smaller than the support distance.

6. 2. The altitude support device of claim 1, wherein said plurality of recessed sections are rounded in shape.

7. 2. The altitude support device of claim 1, wherein said plurality of recessed sections are angular.

8. 2. The altitude holding device of claim 1, wherein said at least one protrusion has a rounded shape.

9. 2. The altitude holding device according to claim 1, wherein said at least one protrusion has a pointed shape.

10. 2. The altitude holding device of claim 1, wherein said at least one protrusion is flat.

11. 2. The altitude holding device according to claim 1, the plurality of recessed sections includes a first recessed section and a second recessed section; The altitude retention device, wherein the at least one protrusion is disposed between the first recessed section and the second recessed section.

12. 12. The altitude holding device of claim 11, an imaginary support plane extending parallel to the first support surface; a first recess depth, which is a maximum distance to the first recess section in a direction perpendicular to the imaginary support plane; a second recess depth, which is a maximum distance to the second recess section in a direction perpendicular to the imaginary support plane; a recess length, which is the shortest distance from the first support surface to the second support surface across the at least one recess; wherein the recess length is greater than the first recess depth and the recess length is greater than the second recess depth.

13. 13. The altitude holding device according to claim 12, wherein the first recess depth is greater than the second recess depth, or the second recess depth is greater than the first recess depth.

14. 13. The altitude holding device of claim 12, wherein the first recess depth is equal to the second recess depth.

15. 2. The altitude holding device according to claim 1, the at least one recess is a first recess and a second recess; An altitude holding device, characterized in that the first recess is offset from the second recess by an intermediate support portion.

16. 2. The altitude holding device according to claim 1, a plurality of intermediate side walls; the plurality of intermediate side walls are radially arranged around the rotation axis of the at least one screw bit body; 10. The altitude retention device according to claim 9, wherein said intermediate side walls are interposed between said lateral support side walls.

17. 17. The altitude support device of claim 16, wherein each of the plurality of intermediate side walls is flat.

18. 2. The altitude holding device according to claim 1, the first support surface is disposed adjacent the first lateral edge; the first recessed section is disposed adjacent the first support surface opposite the first lateral edge; the second support surface is disposed adjacent the second lateral edge; the second recessed section being disposed adjacent the second support surface opposite the second lateral edge.

19. 2. The altitude holding device according to claim 1, wherein the first support surface and the second support surface are parallel to each other.

Images