Height maintenance device

Abstract

The screw bit body allows for efficient torque application to the socket fastener. The screw bit body includes a plurality of lateral brace sidewalls, a first base, and a second base. The lateral brace sidewalls are radially distributed about the axis of rotation of the screw bit body, and each further includes a first side edge, a second side edge, a brace face, and an engagement cavity. The engagement cavity forms an additional gripping point between the screw bit body and the socket fastener to prevent slippage. The engagement cavity crosses the brace face and enters the brace face. Additionally, the engagement cavity traverses the screw bit body from the first base to the second base. The engagement cavity is specifically offset a first distance from the first side edge.

Description

[Technical Field]

[0001] The present invention relates generally to various tools designed for tightening and loosening fasteners, particularly bolts and nuts. More specifically, the present invention relates to a non-slip, multi-directional driver bit designed to prevent damage or stripping of fasteners during the extraction or tightening process. [Background technology]

[0002] Hex bolts, nuts, screws, and other similar threaded devices are used to fasten and hold two or more parts together by engaging complementary threads known as female threads. The general structure of this type of fastener is a cylindrical shaft with an external thread and a head at one end. The external threads engage complementary female threads that are threaded into a hole or nut, locking the fastener in place and fastening the associated parts together. The head is the means by which an external torque force is applied, driving (rotating) the fastener relative to the female threads. The head is specially shaped so that an external tool, such as a wrench, can apply torque to the fastener, rotating it and properly engaging the complementary female threads. This type of fastener is simple, highly effective, and inexpensive, making it very popular in modern construction.

[0003] One of the most common problems when using these types of fasteners, whether male or female, is the tool slipping in, on, or off the head. This is typically caused by either fastener or tool wear, corrosion, overtightening, or damage to the fastener head. The present invention relates to a driver bit design that virtually eliminates slippage. This design uses a series of segments that bite into the fastener head and allow for efficient torque transfer between the driver bit and the fastener head. This invention eliminates the need for typical bolt extractors, which require unnecessary drilling and tools. With the development of power screwdrivers and drills, people began using power tools to apply the necessary twisting force and remove various fasteners. The present invention offers single- or double-sided driver end bits, allowing the application of torque to fasteners in both clockwise and counterclockwise directions, tightening and loosening the fastener. Most driver end bits have a standardized 1 / 4-inch hex holder and are available in various configurations, including, but not limited to, square-end, hex-end, and star-end. [Brief explanation of the drawings]

[0004] [Figure 1] 1 is a perspective view of the present invention; [Figure 2] FIG. 1 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 of FIG. 2. [Figure 4] FIG. 3 is a rear view of the alternative embodiment of the present invention of FIG. 2. [Figure 5] FIG. 1 is a perspective view of an alternative embodiment of the present invention. [Figure 6] 1 is a bottom perspective view of the present invention. [Figure 7] FIG. 1 is a perspective view of an alternative embodiment of the present invention. [Figure 8] FIG. 1 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 of FIG. 8. [Figure 10] FIG. 1 is a perspective view of an alternative embodiment of the present invention. [Figure 11] FIG. 1 is a perspective view of an alternative embodiment of the present invention. [Figure 12] FIG. 1 is a perspective view of an alternative embodiment of the present invention. [Figure 13] 3 is a front view of a separate alternative embodiment of the present invention, related to FIG. 2, in which the cross section of the engagement cavity has an overall triangular profile. [Figure 14] 3 is a rear view of a separate alternative embodiment of the present invention, related to FIG. 2, in which the cross section of the engagement cavity has an overall triangular profile. [Figure 15] 3 is a front view of another separate alternative embodiment of the present invention, related to FIG. 2, in which the cross section of the engagement cavity has an overall triangular profile. [Figure 16] FIG. 16 is a front view of another separate alternative embodiment of the present invention related to FIG. 15, in which different portions of the lateral brace sidewalls are either concave or convex. [Figure 17] FIG. 16 is a front view of another separate alternative embodiment of the present invention related to FIG. 15, in which different portions of the lateral brace sidewalls are either convex or concave. [Figure 18] FIG. 16 is a front view of another separate alternative embodiment of the present invention, related to FIG. 15, in which the engagement cavity is disposed between flat side walls. [Figure 19] FIG. 16 is a front view of another separate alternative embodiment of the present invention, related to FIG. 15, in which the engagement cavity is disposed between flat side walls. [Figure 20] FIG. 16 is a front view of another separate alternative embodiment of the present invention, related to FIG. 15, in which the engagement cavity is disposed between flat side walls. [Figure 21] FIG. 3 is a perspective view of another separate alternative embodiment of the present invention, related to FIG. 2, in which opposing bit bodies are disposed at an angle to one another. [Figure 22] FIG. 16 is a front view of another alternative embodiment of the present invention, related to FIG. 15, in which the engagement cavity is disposed between flat side walls. DETAILED DESCRIPTION OF THE INVENTION

[0005] All figures are for the purpose of illustrating selected versions of the invention and are not intended to limit the scope of the invention.

[0006] The present invention relates generally to torque tool accessories. More specifically, the present invention is a multi-grip screw bit, also known as a screw bit or driver. The present invention allows for higher torque to be applied to fasteners than conventional driver bits of the same 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 present invention is a screw bit that is compatible with a variety of torque tools, including, but not limited to, conventional drills, bit-receiving drivers, socket wrenches, and socket drivers.

[0007] As shown in FIG. 1 , in its simplest embodiment, the present invention includes at least one screw bit body 1 and a mounting body 19. The screw bit body 1 is a shank that engages a socket fastener, such as a socket screw or socket bolt, to more quickly apply torque to the socket. The screw bit body 1 includes a plurality of lateral brace sidewalls 2, a first base portion 14, a second base portion 15, and at least one engagement cavity 8. The at least one engagement cavity 8 is generally transversely cut into the at least one screw bit body 1 and helps distribute torsional forces applied during preferred use of the present invention to maximize efficiency and minimize wear. Broadly speaking, the screw bit body 1 is a rectangular pillar made of high-strength metal. Each of the plurality of lateral brace sidewalls 2 engages and grips within a socket fastener to efficiently transfer torque from the torque tool to the socket fastener. The first base portion 14 and the second base portion 15 are positioned opposite each other along the plurality of lateral brace sidewalls 2. Furthermore, the first base portion 14, and therefore the second base portion 15, are preferably oriented perpendicular to each of the plurality of lateral brace sidewalls 2, thus enclosing (completing) the rectangular column shape of the screw bit body 1. More specifically, the first base portion 14 comprises a first base surface 26, which is preferably flat and oriented perpendicular to the brace surface 5 of each of the plurality of lateral brace sidewalls 2. The brace surface 5 may further include a first portion 33. The first portion 33 is a portion of the brace surface 5 disposed along the first distance 21, thereby positioning the first portion 33 adjacent to the first side edge 3. The mounting body 19 allows the present invention to be attached to an external torque tool, thereby enabling torque force to be applied to the socket fastener via the screw bit body 1. The mounting body 19 is concentrically disposed around and along the rotation axis 16 of the screw bit body 1, such that the rotation axis of the mounting body 19 coincides with the rotation axis 16 of the screw bit body 1. Additionally, the mount 19 is adjacently connected to the second base 15. The mount 19 preferably has a hexagonal cross section to fit within the female attachment member of an external torque tool.External torque tools include, but are not limited to, electric drills, torque wrenches, air socket fastener drivers, and other similar torque tools. The engagement cavity 8 preferably has a combination of curved and straight sections, but may have any shape preferred by the user, including, but not limited to, partial circles, triangles, rectangles, and other shapes. Furthermore, the shape of each section of the engagement cavity 8 may be a combination of shapes selected from the group consisting of straight, concave, and convex, if preferred. These shapes, combined or used alone, may further enhance the lifespan, safety, and functionality of the present invention for a particular application, as determined by the user. In an exemplary embodiment, the overall cross section 9 of at least one engagement cavity 8 is triangular. This configuration provides sufficient space for relaxation of residual stresses and material that strain the at least one engagement cavity 8 during torque application. Furthermore, the triangular contour may be concave along a direction from the first side edge 3 to the second side edge 4. In this manner, torsional stresses are captured within the at least one engagement cavity 8 during torsion. In another exemplary embodiment, the at least one engagement cavity 8 includes both curved and straight portions, which allows the at least one engagement cavity 8 to optimally interact with various fastener profiles, materials, or stress levels in use.

[0008] Some embodiments generally offer greater mechanical wear resistance and utilization advantages during use. To this end, as shown in FIGS. 9 , 18 , 19 , 21 , and 22 , at least one engagement cavity 8 is offset from a first side surface 3 of at least one specific side wall 36 by a first distance 21. As a result, a gripping point is formed by the at least one engagement cavity 8 and the bracing surface 5. A first portion 33 of the bracing surface 5 of at least one specific side wall 36 may be disposed along the first distance 21. In this case, the first distance 21 may refer to an area including a segment of the first portion 33. A widthwise distance 35 of the at least one engagement cavity 8 may be disposed parallel to the bracing surface 5. This arrangement allows the widthwise distance 35 to be parallel to the first distance 21. The widthwise distance 35 may be greater than the first distance 21. In this way, at least one engagement cavity 8 is ensured over most of the area available for the brace face 5 .

[0009] The first portion 33 of the present invention may take on a variety of shapes that may be advantageous in various stresses or use cases. As shown in Figures 14-17, to ensure the proper shape of the at least one engagement cavity 8, the first portion 33 may have a shape selected from the group consisting of straight, concave, and convex. Any of these shapes may provide optimal support during use and improve the longevity of the present invention.

[0010] Advantages can be gained by providing the brace surface 5 with even more complex shapes or arrangements. To achieve this, as shown in FIGS. 14 to 17 , the brace surface 5 may further include a second portion 34. The second portion 34 is a portion of the brace surface 5 disposed along the second distance 22, such that the second portion 34 is disposed adjacent to the second side edge 4. The at least one engagement cavity 8 may be offset from the second side edge 4 of the at least one specific side wall 36 by the second distance 22. The second distance 22 indicates the distance between the at least one engagement cavity 8 and the second side edge 4, opposite the first distance 21. The second portion 34 of the brace surface 5 of the at least one specific side wall 36 may be disposed along the second distance 22. In this case, the second distance 22 may indicate an area including a segment 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. In this manner, the second portion 34 can be adapted to best address potential mechanical fatigue of the present invention. Additionally, at least one engagement cavity 8 may be tapered perpendicular to the axis of rotation from a position adjacent the first distance 21 or the second distance 22 toward the lateral end. This arrangement allows for optimal application of force during rotational use of the present invention. The geometric plane of the brace surface 5 adjacent to the at least one engagement cavity 8 is preferably collinear with the geometric plane of the side edge extending from the first side edge 3 to the second side edge 4. However, in some embodiments, the geometric plane of the brace surface may not be collinear with the geometric plane of the side edge, but may be offset from the geometric plane of the side edge.

[0011] In many situations, a user may apply torsional pressure from various angles within the external threads. To accommodate this, the second portion 34 of the bracing surface 5 of at least one particular side wall 36 can be positioned at a predetermined angle from the first portion 33 of the bracing surface 5 of at least one particular side wall 36. This arrangement allows for accurate filling of externally threaded holes of other shapes. This arrangement is also within the scope of the present invention.

[0012] The triangular profile may further include a plurality of vertices 27, as shown in FIG. 15. The plurality of vertices 27 correspond to a locus of points representing the corners of the triangular outline. Each of the plurality of vertices 27 may have rounded corners. This arrangement prevents the accumulation of point stresses at the plurality of vertices 27 without significantly reducing the space required to effectively mitigate the effects of metal fatigue.

[0013] In many cases, slight modifications to a strict triangular profile may be advantageous, depending on the strength of the torque stress and the shape of the bolt or fastener. To improve efficiency in these situations, the triangular profile may include multiple vertices 31 and a pair of elongated portions 32, as shown in Figures 16 and 17. The multiple vertices 31 correspond to a set of points representing the corners of the triangular outline. The multiple vertices 31 can be considered as two leading edge elements along the first side edge 3 and the first side edge 4, and a single cavity base element. The single cavity base element may also be a straight line connected to the pair of elongated portions 32. The pair of elongated portions 32 represent sides connecting the multiple vertices 31. The pair of elongated portions 32 are interspersed between the multiple vertices 31. Each of the pair of elongated portions 32 has a shape selected from the group consisting of a straight line, a concave shape, and a convex shape. The group of shapes that may be selected for the multiple vertices 31, the pair of elongated portions 32, or the single cavity base element may be a radius or an angle. This arrangement allows the pair of elongated portions 32 to better accommodate different torque stresses and prevent harmful wear of the used bit due to metal fatigue.

[0014] Other applications may require modifying the shape of the edges surrounding the triangular profile together. To achieve this, as shown in FIGS. 16 and 17, the brace face 5 may include a first portion 33 and a second portion 34. The first portion 33 and the second portion 34 correspond to the edges surrounding the triangular profile. The first portion 33 is disposed along a first distance 21, thereby positioning the first portion 33 adjacent to the first side edge 3. The second portion 34 is disposed along a second distance 22, thereby positioning the second portion 34 adjacent to the second side edge 4. As shown in FIGS. 16 and 17, shapes that can be selected for the first portion 33 and the second portion 34 include radiused or angled shapes. It is often most advantageous for the first portion 33 and the second portion 34 to exhibit opposite curvatures, one concave and the other convex, to optimally reduce the effects of cyclic stress on the present invention. The first side edge 3 and the second side edge 4 may be further modified to form angular or radiused side edges.

[0015] As shown in FIGS. 3 and 4 , each of the plurality of lateral brace sidewalls 2 includes a first side edge 3, a second side edge 4, and a brace face 5. The plurality of lateral brace sidewalls 2 are radially arranged about the rotational axis 16 of the screw bit body 1 to provide a complementary geometry to the socket fastener. The number of lateral brace sidewalls 2 can be varied to complement various socket fastener shapes and profiles. In one embodiment of the present invention, the number of lateral brace sidewalls 2 is six, resulting in a hexagonal geometry for the screw bit body 1. In an alternative embodiment of the present invention, the number of lateral brace sidewalls 2 is four.

[0016] The brace surface 5 physically presses against the side wall of the socket fastener, particularly the head portion of the socket fastener. The first side edge 3 and the second side edge 4 are located on opposite sides of the brace surface 5. When viewed from the top or bottom, the first side edge 3 and the second side edge 4 of each of the plurality of lateral brace side walls 2 define corners of the screw bit body 1. The engagement cavity 8 extends from the plurality of lateral brace side walls 2 in a direction normal to the brace surface 5 of at least one particular side wall 36, forming additional gripping points (teeth) on the brace surface 5. In another embodiment, the gripping points are formed by an edge adjacent to the engagement cavity 8, which may be either the first side edge 3 or the second side edge 4. More specifically, the adjacent edge is the edge closest to the engagement cavity 8. Furthermore, the engagement cavity 8 extends 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. To further achieve this objective, the entire cross section 9 of the engagement cavity 8 is preferably parallel to the first and second bases 14, 15. In some embodiments of the present invention, at least one engagement cavity 8 also tapers from the first base 14 to the second base 15, as seen in FIG. 11 . As a result of this embodiment, at least one engagement cavity 8 may taper from the first base 14 to the second base 15 such that the triangular profile adjacent the first base 14 is larger than the triangular profile adjacent the second base 15. In this manner, at least one engagement cavity 8 can be appropriately shaped to suit the needs and requirements of the user. As shown in FIG. 3 , in one embodiment of the present invention, the entire cross section 9 of the engagement cavity 8 is partially circular. Furthermore, this partially circular profile is concave relative to the direction from the first side edge 3 to the second side edge 4. This partial circular profile increases the overall life of the tool by eliminating many points of high stress on the screw bit body 1. In another embodiment of the invention, as shown in Figures 13 and 14, the entire cross section 9 of the engagement cavity 8 is triangular in shape.Furthermore, the triangular outline is concave in the direction from the first side edge 3 to the second side edge 4. Other shapes for the engagement cavity 8 can be used, including, but not limited to, a semi-square, a semi-rectangle, or a semi-ellipse.

[0017] As shown in Figures 8 and 9, in one embodiment of the present invention, the entire cross section 9 of the engagement cavity 8 is comprised of a curved portion 10 and a straight portion 11. In this embodiment, the invention is embodied as an extraction bit designed to extract damaged or broken fasteners, broken rods, broken studs, and the like. The engagement cavity 8 is uniquely shaped to form sharp engagement teeth that grip the corners of the socket fastener, allowing material to enter the engagement cavity 8 from the interior side of the fastener socket, providing a superior grip compared to conventional tools designed to simply push material away. This is especially true for worn or damaged fastener sockets. More specifically, the curved portion 10 is a semicircular curve positioned adjacent to the first side edge 3. The curved portion 10 is positioned adjacent to the first portion 33 of the bracing surface 5 of at least one specific side wall 36, opposite the first side edge 3. This arrangement allows the first portion 33 to effectively position the curved portion 10 relative to the first distance 21. The straight portion 11 guides a portion of the socket fastener so as to press it against the engaging teeth. Therefore, the straight portion 11 extends from the curved portion 10 to the second side edge 4. More specifically, the straight portion 11 starts from the curved portion 10 and ends at the second side edge 4.

[0018] In another embodiment of the present invention, as shown in FIG. 11, the engagement cavity 8 is centered on the brace face 5. Specifically, the engagement cavity 8 is offset a second distance 22 from the second side edge 4 of at least one specific side wall 36. In the case of centering, the first distance 21 is equal to the second distance 22, as shown in FIG. 15. This positions the engagement cavity 8 to engage the interior side wall of the socket fastener, shifting torque stresses toward or away from the fastener's side corners to enhance grip, prevent fastener curling, minimize the possibility of slippage, and achieve the most efficient torque transfer. Furthermore, this embodiment can be used with socket fasteners rotated in either a clockwise or counterclockwise direction. Also, in the embodiment shown in FIGS. 19 and 22, where the first distance 21 is equal to the second distance 22, it may be desirable to have multiple intermittent side walls 24 interspersed between at least one specific side wall 36.

[0019] In other embodiments of the present invention, the ratio between first distance 21, second distance 22, and the width of engagement cavity 8 may be varied to achieve clockwise or counterclockwise specific designs. In one embodiment, the present invention is configured as a clockwise drive bit. In this embodiment, second distance 22 is greater than first distance 21. Specifically, the ratio between first distance 21, second distance 22, and the width of engagement cavity 8 is 1:5:4, resulting in a design of the present invention that grips socket fasteners and applies torque in a clockwise direction. This design is used to screw and secure socket fasteners. In another embodiment, the present invention is configured as a counterclockwise screw bit. In this embodiment, first distance 21 is greater than second distance 22. Specifically, the ratio between first distance 21, second distance 22, and the width of engagement cavity 8 is 5:1:4, resulting in a design that grips socket fasteners and applies torque in a counterclockwise direction. This design is used to release and extract socket fasteners.

[0020] As shown in FIGS. 5 and 10 , the present invention may also be implemented in spline / square / other polygonal bit designs. More specifically, if the screw bit body 1 is a spline-type bit body, the spline-type bit body can transmit torque to a socket fastener via multiple protrusions. In this case, the screw bit body 1 may further include a plurality of interrupted sidewalls 24, as shown in FIGS. 18 to 22 . Each of the plurality of interrupted sidewalls 24 is a flat surface that engages with a socket fastener, as in conventional screw bit designs. The plurality of interrupted sidewalls 24 are arranged radially around the rotation axis 16. Furthermore, the plurality of interrupted sidewalls 24 are interspersed among the plurality of lateral brace sidewalls 2. The ratio between the plurality of lateral brace sidewalls 2 and the plurality of interrupted sidewalls 24 may be varied to achieve various screw bit designs. In one embodiment, the plurality of interrupted sidewalls 24 and the plurality of lateral brace sidewalls 2 are arranged alternately in the radial direction. In another embodiment, three of the plurality of interrupted side walls 24 are between each of the plurality of lateral brace side walls 2. As a result, in this configuration, engagement features (teeth) are located on every other protrusion of the screw bit body 1.

[0021] As shown in FIG. 10 , in the exemplary embodiment, a first interrupted sidewall 28, a second interrupted sidewall 29, and a third interrupted sidewall 30 of the plurality of interrupted sidewalls 24 are interspersed on corresponding lateral brace sidewalls of the plurality of lateral brace sidewalls 2. The first interrupted sidewall 28, the second interrupted sidewall 29, and the third interrupted sidewall 30 provide the desired spacing to prevent mechanical wear and fatigue of the components while allowing for effective fastener connection. The first interrupted sidewall 28 and the second interrupted sidewall 29 are positioned perpendicular to each other. This arrangement forms a 90-degree angle and may be optimal for certain applications. The third interrupted sidewall 30 is positioned between the second interrupted sidewall 29 and at least one engagement cavity 8 of the corresponding lateral brace sidewall. Thus, the third interrupted sidewall 30 provides structural support for the at least one engagement cavity 8 in a preferred use of the present invention.

[0022] It may be mechanically advantageous or preferable to provide different configurations of at least one engagement cavity 8, such that the engagement cavity 8 is present in multiple side walls of the at least one screw bit body 1. Thus, the at least one specific side wall 36 may be multiple specific side walls. This arrangement allows the multiple specific side walls to encompass various patterns around the screw bit body 1. Furthermore, the at least one engagement cavity 8 may be multiple engagement cavities. In this manner, each specific side wall may be appropriately shaped with the engagement cavity 8. Finally, each of the multiple engagement cavities 8 may extend from the multiple specific side walls in a direction normal to the bracing surface 5 of the corresponding specific side wall and extend into it. Therefore, each specific side wall may be cavitated or otherwise shaped with the cavities of the multiple engagement cavities 8. Therefore, each specific side wall may be hollowed out or formed accordingly to have recesses of the multiple engagement cavities 8.

[0023] To accommodate this, the plurality of lateral brace sidewalls may further include at least one flat sidewall 37. The at least one flat sidewall 37 refers to a sidewall of the plurality of lateral brace sidewalls 2 that does not include a particular cavity feature. The at least one flat sidewall 37 may be disposed adjacent to the at least one particular sidewall 36. In this manner, a flat sidewall can be disposed between each sidewall of the at least one particular sidewall 36, thereby enabling different configurations of cavity-equipped sidewalls and flat sidewalls.

[0024] As shown in FIG. 6 , in another embodiment, the present invention further includes an engagement bore 20. The engagement bore 20 allows the present invention to be attached to a male attachment member of an external torque tool, such as a socket wrench or driver. The engagement bore 20 extends along the axis of rotation into the attachment body 19 opposite the screw bit body 1. The engagement bore 20 is shaped to receive the male attachment member of a socket wrench, with a preferred shape being square since the majority of socket wrenches utilize square attachment members. In this embodiment, the preferred attachment body 19 is cylindrical. In alternative embodiments, the shape and design of the engagement bore 20 and attachment body 19 may vary to accommodate different torque tool designs and different attachment means.

[0025] As shown in FIG. 2 , in one embodiment, the present invention is embodied as a double-sided screw bit, thereby simultaneously providing both clockwise and counterclockwise rotation configurations with a single tool. In this embodiment, at least one screw bit body 1 comprises a first screw bit body 17 and a second screw bit body 18. The mounting body 19 preferably has a hexagonal cross-section. The mounting body 19 is concentrically disposed around and along the rotational axis 16 of the first screw bit body 17, such that the rotational axis of the mounting body 19 coincides with the rotational axis 16 of the first screw bit body 17. Furthermore, the mounting body 19 is adjacently coupled to the second base 15 of the first screw bit body 17. The second screw bit body 18 shares the mounting body 19 with the first screw bit body 17. Therefore, the second screw bit body 18 is concentrically disposed with the first screw bit body 17. Furthermore, the second screw bit body 18 is positioned adjacent to the mounting body 19 on the opposite side of the first screw bit body 17, similar to conventional double-sided screw bit designs. Similar to the first screw bit body 17, the attachment body 19 is coupled to the second base 15 of the second screw bit body 18. The first screw bit body 17 has a clockwise configuration and is designed to screw in socket fasteners. As such, as shown in FIG. 3 , the second distance 22 of the first screw bit body 17 is greater than the first distance 21 of the first screw bit body 17. This results in an additional gripping point of the first screw bit body 17 being located adjacent to the first side edge 3 of the first screw bit body 17. The second screw bit body 18 has a counterclockwise configuration and is designed to loosen (withdraw) socket fasteners. As shown in FIG. 4 , the first distance 21 of the second screw bit body 18 is greater than the second distance 22 of the second screw bit body 18. This results in an additional gripping point of the second screw bit body 18 being located adjacent to the second side edge 4 of the second screw bit body 18.

[0026] In a further embodiment, a double-sided screw bit may benefit from being positioned or oriented to have a bend between the first screw bit body 17 and the second screw bit body 18 (as is common with hex keys and similar wrench tools). To this end, as shown in FIG. 21, the second screw bit body 18 may be oriented to form an angle 38 with the first screw bit body 17. This arrangement allows a user to use the first screw bit body 17 as a handle when turning an external screw with the second screw bit body 18.

[0027] In another embodiment of the present invention, as shown in FIG. 5 , at least one engagement cavity 8 is comprised of a first cavity portion 12 and a second cavity portion 13. This embodiment is an alternative configuration that can accommodate both clockwise and counterclockwise rotations. Specifically, the first cavity portion 12 and the second cavity portion 13 are oriented parallel to but offset from one another. The first cavity portion 12 is positioned offset from the first side edge 3, and the second cavity portion 13 is positioned offset from the second side edge 4. This allows a user to use the present invention in either a clockwise or counterclockwise direction while utilizing additional gripping points without removing the present invention from the torque tool. In this embodiment, the present invention further comprises a plurality of interrupted side walls 24, preferably interspersed among the plurality of lateral brace side walls 2. As a result of this embodiment, the triangular profile may be a plurality of triangular profiles arranged along the plurality of lateral brace side walls 2. Such an embodiment allows the present invention to be more adaptable to various high-stress applications.

[0028] In an alternative embodiment, as shown in FIG. 7 , the present invention is embodied as a ball-end screw bit. In this embodiment, the brace surface 5 of each of the transverse brace sidewalls 2 comprises a protrusion 6 and a recess 7. The protrusions 6 and the recesses 7 collectively define a curved surface such that the transverse brace sidewalls 2 form a ball-like shape. The protrusions 6 are positioned adjacent to the first base 14 so that the protrusions 6 of each of the transverse brace sidewalls 2 form a ball-like body. The recesses 7 are positioned adjacent to the protrusions 6 and opposite the first base 14 so that the recesses 7 of each of the transverse sidewalls 2 further form a ball-like shape and provide clearance for when the screw bit body 1 engages a socket fastener at an angle. The protrusions 6 and the recesses 7 are oriented along the rotation axis 16 of the screw bit body 1, and thus along the length of the screw bit body 1, with the ball-like shape located at the end of the screw bit body 1. The curvature, length, and height of the recesses 7 and protrusions 6 are preferably identical. Additionally, the engagement cavity 8 preferably extends along the entire length of the projection 6 and recess 7. This provides additional grip along the screw bit body 1 regardless of the angle between the socket fastener and the screw bit body 1.

[0029] As shown in FIG. 10 , in one embodiment, the present invention is embodied as a tamper-resistant screw bit. Specifically, the present invention further includes a pin-in security hole 23 that interlocks with a complementary post in a unique socket fastener. In this case, a unique socket fastener and a unique screw bit set can be sold, utilized, or manufactured to ensure a tamper-resistant design. This type of interlocking design is used for security reasons, preventing unauthorized access to a specific socket fastener. The pin-in security hole 23 is positioned concentrically with the rotation axis 16 of the screw bit body 1. Furthermore, the pin-in security hole 23 extends from the first base 14 into the screw bit body 1. The size, depth, and profile of the pin-in security hole can be modified to meet user needs and specifications.

[0030] In one embodiment, as shown in FIG. 11 , the present invention includes an additional element for guiding the screw bit body 1 into the socket fastener. Specifically, the lateral edges 25 between the first base 14 and each of the plurality of lateral brace sidewalls 2 are chamfered to assist the user in engaging the screw bit body 1 within the socket fastener. In another embodiment, as shown in FIG. 12 , the present invention is implemented with an alternative design. In this embodiment, the screw bit body 1 is tapered from the second base 15 toward the first base 14. The degree of taper can be varied depending on the user's needs and requirements. In yet another embodiment, as shown in FIG. 22 , the present invention provides a screw bit body tapered from the second base 15 toward the first base 14, including at least one tapered flat sidewall 37 adjacent to at least one specific tapered sidewall 36. In other words, the at least one specific sidewall 36 and the at least one flat sidewall 37 are not perpendicular to the first base 14, as shown in FIG. 22 . Some embodiments are generally more advantageous in terms of resistance to and utilization of mechanical wear during use. To this end, the at least one engagement cavity 8 is positioned offset by a first distance 21 from the first side edge 3 of the at least one specific side wall 36, as shown in FIG. 22 . As a result, a gripping point is formed between the at least one engagement cavity 8 and the brace surface 5. The first portion 33 of the brace surface 5 of the at least one specific side wall 36 may be positioned along the first distance 21. In this case, the first distance 21 may indicate an area including a segment of the first portion 33. The widthwise distance 35 of the at least one engagement cavity 8 may be positioned parallel to the brace surface 5. This arrangement allows the widthwise distance 35 to be parallel to the first distance 21. The widthwise distance 35 may be greater than the first distance 21. In this manner, the at least one engagement cavity 8 is secured across a majority of the area useful for the brace surface 5.

[0031] The first portion 33 of the present invention can have a variety of shapes that may be advantageous in various stresses or use cases. To ensure the proper shape of the at least one engagement cavity 8, the first portion 33 may have a shape selected from the group consisting of straight, concave, and convex, as shown in Figures 14 to 17. Any of these shapes may provide optimal support during use and improve the durability of the present invention.

[0032] In some cases, a more complex shape or arrangement of the brace surface 5 may be advantageous. To achieve this, as shown in FIG. 22 , the brace surface 5 may further include a second portion 34. The second portion 34 is a portion of the brace surface 5 disposed along the second distance 22, such that the second portion 34 is disposed adjacent to the second side edge 4. The at least one engagement cavity 8 may be offset from the second side edge 4 of the at least one specific side wall 36 by the second distance 22. The second distance 22 indicates the space between the at least one engagement cavity 8 and the second side edge 4, opposite the first distance 21. The second portion 34 of the brace surface 5 of the at least one specific side wall 36 may be disposed along the second distance 22. In this manner, the second distance 22 may indicate an area including a segment 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. In this manner, the second portion 34 can be adapted to best address potential mechanical fatigue of the present invention. Furthermore, at least one engagement cavity 8 may be tapered perpendicular to the axis of rotation from a position adjacent the first distance 21 or the second distance 22 toward the lateral end. This arrangement allows for optimal application of force 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 geometric plane of the bracing surface 5 adjacent to the at least one engagement cavity 8 is preferably collinear with the geometric plane of the side edge extending from the first side edge 3 to the second side edge 4. However, in some embodiments, as shown in FIG. 22 , the geometric plane of the bracing surface may be offset from the geometric plane of the side edge rather than being collinear with the geometric plane of the side edge. The width distance of the flat side wall 37 may be less than, equal to, or greater than the width distance of a particular side wall 36. The width of the first portion 33 and the width of the second portion 34 may taper from the first base 14 to the second base 15. As shown in Figure 22, in one embodiment of the present invention, the overall cross section 9 of the engagement cavity 8 preferably has a partial circular profile. Furthermore, the partial circular profile is concave along the direction from the first side edge 3 to the second side edge 4.The partial circular profile minimizes high stress points on the screw bit body 1, thereby increasing the overall tool life. In a preferred embodiment, the bracing surface 5 of at least one particular side wall 36 is connected to the bracing surface 5 of at least one flat side wall 37 at an obtuse angle. The mounting body 19 allows the present invention to be attached to an external torque tool, thereby applying a torque force to the socket fastener through the screw bit body 1. The mounting body 19 is concentrically positioned around and along the axis of rotation 16 of the screw bit body 1, such that the axis of rotation of the mounting body 19 coincides with the axis of rotation 16 of the screw bit body 1. Additionally, the mounting body 19 is adjacently connected to the second base 15.

[0033] In many situations, a user may wish to apply torsional pressure from different angles within the external threads. To accommodate this, as shown in FIG. 22, the second portion 34 of the bracing surface 5 of at least one particular side wall 36 may be positioned at a predetermined angle from the first portion 33 of the bracing surface 5 of at least one particular side wall 36. This positioning allows for accurate filling of externally threaded holes of other shapes. This is within the scope of the present invention.

[0034] In another embodiment, the present invention may be embodied in the form of a socket for tightening or loosening bolts or other similar fasteners, in which case the screw bit body 1 is implemented as a transverse cavity within a cylinder, similar to conventional socket designs.

[0035] Although the present invention has been described in relation to its preferred embodiments, it should be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.

Claims

1. at least one screw bit body; a mounting body; the at least one screw bit body includes a plurality of lateral brace sidewalls, at least one flat sidewall, a first base, a second base, and at least one engagement cavity, tapering from the second base to the first base; the plurality of lateral brace sidewalls include a first side edge, a second side edge, and a brace face; the plurality of lateral brace sidewalls 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 on opposite sides of the brace surface, the first side edge and the second side edge are angular; the at least one engagement cavity extends into at least one particular one of the plurality of lateral brace sidewalls in a direction perpendicular to the brace face; the at least one flat sidewall is disposed adjacent to the at least one particular sidewall; the at least one engagement cavity extends in the at least one screw bit body from the first base toward the second base; an entire cross section of the at least one engagement cavity is parallel to the first base and the second base; the mounting body is adjacent to and connected to the second base portion; all of the at least one engagement cavities are tapered from the second base to the first base; Multi-grip screw instruments.

2. the at least one screw bit body tapers from the first base portion to the second base portion; 10. The multi-grip screw instrument of claim 1.

3. the at least one screw bit body tapers from the second base portion to the first base portion; 10. The multi-grip screw instrument of claim 1.

4. the at least one engagement cavity is offset a first distance from the first side edge of the at least one particular side wall; a first portion of the brace surface of the at least one particular side wall is disposed along the first distance; the first portion has a shape selected from the group consisting of linear, concave, and convex.

10. The multi-grip screw instrument of claim 1.

5. the at least one engagement cavity is offset a second distance from the second side edge of the at least one particular side wall; a second portion of the brace surface of the at least one particular side wall is disposed along the second distance; the second portion has a shape selected from the group consisting of linear, concave, and convex.

10. The multi-grip screw instrument of claim 1.

6. the second portion of the brace surface of the at least one particular sidewall is disposed at a predetermined angle from the first portion of the brace surface of the at least one particular sidewall.

10. The multi-grip screw instrument of claim 1.

7. the at least one engagement cavity is offset a first distance from the first side edge of the at least one particular side wall; the at least one engagement cavity is offset a second distance from the second side edge of the at least one particular side wall; the first distance is equal to the second distance; 10. The multi-grip screw instrument of claim 1.

8. the one screw bit body further includes a plurality of interrupted side walls; the plurality of interrupted side walls are radially arranged about the axis of rotation; the plurality of intermittent side walls being interspersed between the plurality of lateral brace side walls; 10. The multi-grip screw instrument of claim 1.

9. a lateral edge between the first base and each of the plurality of lateral brace sidewalls is chamfered; 10. The multi-grip screw instrument of claim 1.

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