Anti-slip fastener removal tool

Abstract

To provide an anti-slip fastener remover tool in which slip possibility is substantially excluded.SOLUTION: An anti-slip fastener remover tool includes a torque-tool body 1, a plurality of paired engagement features 3, and an intersection point. The plurality of paired engagement features, which grip a lateral surface of a stripped fastener head, are radially arranged around a rotation axis 2 of the torque-tool body 1. The plurality of paired engagement features 3 include a first engagement feature and a second engagement feature in which the respective engagement features 3 in the pair are offset to each other by 30 degrees. The first engagement feature and the second engagement feature respectively include brace parts, cavity parts and connector parts which are each in a pair and each adjacent and connected to each other. The cavity part of the first engagement feature is adjacent and connected to the cavity part of the second engagement feature. The brace parts of the first engagement feature and the second engagement feature are so located as to face each other with respect to the cavity parts of the first engagement feature and the second engagement feature.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention broadly relates to tools designed to tighten or loosen fasteners (fastening devices), particularly bolts and nuts. More particularly, the present invention is a fastener removal tool having an anti-slip mechanism designed to engage bolts, nuts, and other similar fasteners in a state with little possibility of slipping.

Background Art

[0002] Hex bolts, nuts, screws, and other similar screw devices are used to fix and hold multiple parts by engaging with complementary screws known as "female threads". The general structure of this type of fastener (fastening device) consists of a cylindrical shaft with an external thread and a head portion connected to one end of the cylindrical shaft. The external thread meshes with complementary female threads engraved in a hole or nut, fixes the fastener in a predetermined position, and fixes the related parts to each other. The head portion is a means for receiving an external torque force and rotating (driving) the fastener with respect to the female thread. The head portion has a special shape so that an external tool such as a wrench can apply torque to the fastener and rotate it to engage with the complementary female thread to a certain extent. This type of fastener is simple, very effective, inexpensive, and widely used in modern buildings. One of the most common problems when using this type of fastener, whether it is a male thread or a female thread, is that the tool slips on (or within) the head portion. This is generally caused by any of wear, corrosion, over-tightening of the fastener or tool, or damage to the head portion of the fastener. There are various ways to remove a fastener, some of which are more destructive. Once the fastener head is damaged, more destructive methods may have to be implemented to remove the stuck fastener. Drilling a hole to remove the fastener is a method often used by some users. Although this method may be effective in some cases, there is a high risk of damaging the internal thread on the hole side.

[0003] The present invention is a slip-resistant fastener removal tool that substantially eliminates the possibility of slippage. The present invention uses a series of integrated engagement segments that bite into the head portion of the fastener, enabling efficient torque transmission between the extractor bit and the fastener head portion. As a result, the tool according to the present invention can be used to tighten or loosen fasteners without worrying about damaging the corners of the fastener. [Brief explanation of the drawing]

[0004] [Figure 1] This is a perspective view of the present invention, in which the torque tool body extends outward from the axis of rotation to a plurality of pairs of engaging features. [Figure 2] This is a side view of the present invention, in which the torque tool body extends outward from the rotation axis to a plurality of pairs of engaging features. [Figure 3] This is a top view of the present invention, in which the torque tool body extends outward from the rotation axis to a plurality of pairs of engaging features. [Figure 4] This is a top view of the present invention, in which the torque tool body extends outward from the axis of rotation to a plurality of pairs of engaging features, and a curved portion for the connector, a bisector, a first bisector, and a second bisector are shown. [Figure 5] This is a top view of the present invention, in which the torque tool body extends outward from the axis of rotation to a plurality of pairs of engagement features, and the sharp point, bisector, first angle bisector, and second angle bisector of the connector portion are shown. [Figure 6] This is a top view of the present invention, in which the torque tool body extends outward from the axis of rotation to a plurality of pairs of engaging features, and the radial distances of the intersection, first length, and second length of the present invention are shown. [Figure 7] This is a top view of the present invention, in which the torque tool body extends outward from the rotation axis to a plurality of pairs of engagement feature portions, and the radial distance of the intersection of the present invention, the radial distance of the connector portion of the first engagement feature portion, and the radial distance of the connector portion of the second engagement feature portion are shown. [Figure 8] This is a top view of the present invention, in which the torque tool body extends inward from the outer wall to a plurality of pairs of engaging features. [Figure 9] This is a bottom perspective view of the present invention, showing the engagement bore. [Modes for carrying out the invention]

[0005] All figures in the drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0006] This invention is a non-slip tool used to tighten or loosen damaged or detached fasteners such as nuts and bolts. In conventional wrench designs, most of the torque is transmitted to the damaged or detached fastener through the corners of the fastener head. Over time, deterioration of the corners reduces the efficiency of torque transmission from the wrench to the fastener head, resulting in slippage. This invention overcomes this problem by shifting the contact point to the side of the fastener head. This is achieved by using multiple teeth. Each tooth is positioned to engage ("bite") with the side surface of the fastener head, rather than the corners of the side. This allows the appropriate amount of torque to be transmitted to the fastener head, and once rotation is initiated, the damaged or detached fastener can be pulled out or tightened. However, this invention is also designed so as not to damage fasteners when used with undamaged or new fasteners, even when torque is applied according to the maximum specified torque level or industry-approved torque level for a particular fastener size (diameter).

[0007] The present invention utilizes a number of teeth that engage with the side of the fastener head (whether damaged or not) to efficiently apply torque to damaged or detached fasteners. The present invention can also be incorporated into various general tools to increase the torque force applied to the fastener. Here, general tools include, but are not limited to, open-end wrenches, adjustable wrenches, pipe wrenches, socket wrenches, plumber's wrenches, and other similar fastener engaging tools. The present invention is compatible with fasteners with a female component-based head design, but the present invention can also be incorporated into a male fastener head design as described in this application. Fasteners utilizing a female component-based head design, also known as a female fastener, utilize the internal cavity of the fastener head to engage with a tool for tightening or loosening. Fasteners utilizing a male component-based head design, also known as a male fastener, use the outer side of the fastener head to engage with a tool for tightening or loosening. Furthermore, the present invention is compatible with both right-hand and left-hand threaded fasteners. Furthermore, the present invention may be modified and configured to fit various types and sizes of fasteners.

[0008] As shown in Figures 1 to 4, the present invention includes a torque tool body 1, a plurality of pairs of engaging features 3, and an intersection 34. The torque tool body 1 is used as a physical structure for applying a corresponding force to the fastener head by means of the plurality of pairs of engaging features 3. In some fasteners, the torque tool body 1 functions similarly to a screwdriver bit of a size that fits to engage with the opening of the fastener head. The length, width, and diameter of the torque tool body 1 may be varied to accommodate male or female fasteners of different sizes. The plurality of pairs of engaging features 3 prevent slippage of damaged or detached fasteners during extraction and are arranged radially around the axis of rotation 2 of the torque tool body 1, as shown in Figures 3 to 6 and 8. As a result, the plurality of pairs of engaging features 3 facilitate torque transmission to the male or female fastener by preventing slippage between the torque tool body 1 and the fastener head. The intersection 34 is identified as the meeting point of two pairs of engaging features 3. In other words, any pair of engaging features 32 in a plurality of pairs of engaging features 3 and an adjacent pair of engaging features 33 in the plurality of pairs of engaging features 3 are connected to each other via an intersection 34. Depending on the various embodiments of the present invention, the intersection 34 may be a sharp point or a curved portion with a small radius. In some embodiments, the intersection 34 may incorporate a third segment, which is preferably a straight portion connecting a plurality of pairs of engaging features 3 in any brace portion and an adjacent brace portion 4. More specifically, as shown in Figures 1 to 7, the torque tool body 1 is a male embodiment designed for use with female socket type fasteners.

[0009] Multiple pairs of engaging features 3 are distributed in a polygonal shape within the torque tool body 1, preferably symmetrically positioned along the axis of rotation 2. Here, the axis of rotation 2 crosses the center of the torque tool body 1. In this invention, a symmetrical design is ensured so that the fastener functions equally well when rotated clockwise and counterclockwise.

[0010] As shown in Figure 1, the torque tool body 1 extends outward from the rotation axis 2 toward a plurality of pairs of engagement feature portions 3. As a result, the plurality of pairs of engagement feature portions 3 are distributed on the outer surface of the torque tool body 1 with respect to the rotation axis 2, resulting in the driver bit structure according to the present invention. The driver bit structure of the torque tool body 1 engages with the opening of the fastener head so that the plurality of pairs of engagement feature portions 3 can engage with the fastener head internally.

[0011] In Figures 8 and 9, the torque tool body 1 extends inward from the outer wall 20 to a plurality of pairs of engagement feature portions 3. As a result, the plurality of pairs of engagement feature portions 3 are distributed on the inner circumferential surface of the torque tool body 1 around the rotation axis 2, resulting in the female socket structure according to the present invention. The female socket structure of the torque tool body 1 engages with the lateral surface of the fastener head so that the plurality of pairs of engagement feature portions 3 can externally engage with the fastener head. More specifically, the torque tool body 1 shown in Figures 8 and 9 is an embodiment of a female fastener designed for use with the male surface of a fastener.

[0012] Furthermore, the present invention incorporates a mounting mechanism to enable the attachment of an external torque-applying tool to the torque tool body 1, thereby increasing the torque force applied to the fastener head. As shown in Figures 1 to 2 and Figures 8 to 9, the present invention further comprises an attachment body 10 and an engaging bore 11 that enable the attachment of an external torque-applying tool, such as an open-end wrench, box-end wrench, combination wrench, adjustable wrench, socket wrench, or ratchet wrench, to the torque tool body 1. The attachment body 10 is positioned around the axis of rotation 2, along the axis of rotation 2, and centered on the axis of rotation 2, so as to coincide with the axis of rotation of the external torque-applying tool. Furthermore, the attachment body 10 is connected adjacent to the torque tool body 1. The diameter of the attachment body 10 is preferably slightly larger than the diameter of the torque tool body 1. However, the attachment body 10 may have a smaller diameter than the torque tool body 1, or the attachment body 10 may have the same diameter as the torque tool body 1, depending on the preferred manufacturing method or design. The engagement bore 11 traverses the inside of the attachment body 10 along the axis of rotation 2. The engagement bore 11 is shaped to receive the male mounting member of a socket wrench, and its preferred shape is square, since the majority of socket wrenches utilize a square male mounting member. In alternative embodiments, the shape and design of the engagement bore 11 and the attachment body 10 may be varied to accommodate various torque-applying tools and different mounting means, and may include, but are not limited to, polygonal or cylindrical shapes. In alternative embodiments, the outer surface of the attachment body 10 may be knurled or otherwise surface-gripened to increase friction between the torque tool body 1 and the user's hand.

[0013] The bottom surface of the attachment body 10 may be tapered so as it moves away from the engagement bore 11, so that the multiple pairs of engagement features 3 can be driven into the damaged or detached fastener head by a hammer without striking or damaging the engagement bore 11. In other words, depending on the user's preference, the diameter of the attachment body 10 near the engagement bore 11 may be slightly larger than the diameter of the attachment body 10 near the torque tool body 1, and the bottom surface of the attachment body 10 may be tapered so as it moves away from the engagement bore 11. In some embodiments of the present invention, the attachment body 10 itself functions as an engagement feature between the present invention and an external torque force, so the attachment body 10 does not have to include an engagement bore 11. The attachment body 10 may have an external shape that is hexagonal or square so that torque can be applied by an external torque tool such as a wrench, socket, or pliers. In an alternative embodiment, the attachment body 10 may incorporate a wrench handle, which is preferably connected diametrically to the torque tool body 1. In other words, the wrench handle is connected perpendicularly to the torque tool body 1 and the rotation axis 2.

[0014] Furthermore, the wrench handle may be connected to the outside of the torque tool body 1, in which case the wrench handle functions as an external torque application tool. In the female torque tool body 1, each of the multiple pairs of engaging features 3 extends along a specific length of the torque tool body 1, thereby defining a cavity within the torque tool body 1. The aforementioned cavity functions as a fastener head receiving cavity, allowing the multiple pairs of engaging features 3 to grip the lateral surface of the fastener head. The present invention further comprises a fastener receiving hole that penetrates the torque tool body 1. The fastener receiving hole, perpendicular to the rotation axis 2, is located across the torque tool body 1 on the opposite side of the wrench handle and provides a lateral opening for engaging the multiple pairs of engaging features 3.

[0015] The attachment body 10 may incorporate a quick-connect function, which is commonly used in drills, impact drivers, and driver attachments.

[0016] As shown in Figures 3 and 8, the multiple pairs of engagement feature portions 3 are arranged at equal intervals relative to the torque tool body 1, forming an enclosed shape. To form the enclosed shape, the multiple pairs of engagement feature portions 3 include a first engagement feature portion 7, a second engagement feature portion 8, and a bisector 6.

[0017] Furthermore, as shown in Figures 3 and 8, the cross-sections of the first engagement feature portion 7 and the second engagement feature portion 8 each include a brace portion 4, a cavity portion 5, and a connector portion 31. More specifically, the brace portion 4 and the cavity portion 5 are adjacent to each other and connected by the connector portion 31, defining a single engagement feature portion that bites into the fastener head when removing a damaged or detached fastener. The connector portion 31 is preferably small and convex, but may be angular or concave. The connector portion 31 may also be a sharp intersection. The length of the connector portion 31 is preferably shorter than the brace portion 4 or cavity portion 5 of the first engagement feature portion 7 and the second engagement feature portion 8. However, the ratio of the length of the connector portion 31 to the lengths of the other components in the first engagement feature portion 7 and the second engagement feature portion 8 may be arbitrary. In some embodiments, the brace portion 4, the connector portion 31, and the first portion of the cavity portion 5 are continuous and lie on the same straight line. Within the aforementioned single male engagement function, the brace portion 4 functions as a third engagement function, the cavity portion 5 functions as a first engagement function, and the connector portion 31 functions as a second engagement function. However, it should be understood that in the female embodiment of the present invention, the order of the paired engagement features 3 is reversed. Furthermore, the order of the paired engagement features 3 may be any order in a particular embodiment, application, or fastener, and is not limited to the order described above. For example, in some situations, the connector portion 31 may be the first engagement feature in the order of the paired engagement features 3. When a torque force is applied to the torque tool body 1, the fastener head can engage with the first, second, or third engagement feature of the single engagement feature, or with all three engagement features within the single engagement feature, depending on its shape.

[0018] In some applications or embodiments of the torque tool body 1, when the brace portion 4 engages with the male fastener, the cavity portion 5 remains empty. In other words, of the multiple pairs of engaging feature portions 3, the brace portion 4 engages with the fastener, but the cavity portion 5 does not engage with the fastener head and remains empty. This allows a greater force to be applied to the fastener surface via the brace portions 4 of the multiple pairs of engaging feature portions 3. When the brace portion 4 of any pair of engaging feature portions 32 and the brace portion 4 of an adjacent pair of engaging feature portions 33 simultaneously engage with the fastener surface, the torque force of the first engaging feature portion 7 and the second engaging feature portion 8 is generated alternately and intermittently within the enclosed shape, depending on the rotation direction of the tool. In other words, when the first engaging feature portion 7 engages with the fastener and torque force is applied, the second engaging feature portion 8 intermittently engages. Alternatively, when the second engagement feature 8 engages with the fastener and a torque force is applied, the first engagement feature 7 engages intermittently. The bisector 6 separates the first engagement feature 7 and the second engagement feature 8 into equal sections in each of the multiple pairs of engagement feature 3.

[0019] The upper surface of the torque tool body 1 and the lower surface of the attachment body 10 are positioned on opposite sides of each other, with a plurality of pairs of engaging features 3 in between, and the upper and lower surfaces are configured as flat surfaces.

[0020] The lengths of the brace portion 4 and the cavity portion 5, and the corresponding angles between the brace portion 4 and the cavity portion 5 may be arbitrary in order to create a shape like sharp teeth in the engagement feature portion. The first engagement feature portion 7 is an arbitrary feature portion within the engagement feature portions 3 forming a plurality of pairs, and the second engagement feature portion 8 is a feature portion located directly beside the first engagement feature portion 7 within the engagement feature portions 3 forming corresponding plurality of pairs. More specifically, the cavity portion 5 of the first engagement feature portion 7 is connected adjacent to the cavity portion 5 of the second engagement feature portion 8. As shown in FIGS. 1 to 7, the cavity portion 5 of the first engagement feature portion 7 and the cavity portion 5 of the second engagement feature portion 8 are oriented toward the rotation axis 2 and define a radial shape. The shape is preferably a partial circular shape or an elliptical shape, but may also be an angular shape such as a triangular shape, a trapezoidal shape, a square shape, etc., and is not limited to these shapes. The cavity portions 5 can also be joined by combining the shapes, but in a preferred case for manufacturing, they may be joined with a shape or component in a radial profile. The brace portion 4 of the first engagement feature portion 7 and the brace portion 4 of the second engagement feature portion 8 are arranged opposite to each other with respect to the cavity portion 5 of the first engagement feature portion 7 and the cavity portion 5 of the second engagement feature portion 8, and are directed in a direction away from the rotation axis 2. In other words, the cavity portion 5 of the first engagement feature portion 7 and the cavity portion 5 of the second engagement feature portion 8 are arranged adjacent to each other between the brace portion 4 of the first engagement feature portion 7 and the brace portion 4 of the second engagement feature portion 8.

[0021] As shown in FIGS. 1 to 9, the ratio of the length (the first length ratio) between the brace portion 4 of the first engagement feature portion 7 and the cavity portion 5 of the first engagement feature portion 7 is 1:2. The brace portion 4 of the first engagement feature portion 7 is preferably a flat surface, but may also be a camber surface or a concave surface. The ratio of the length (the second length ratio) between the brace portion 4 of the second engagement feature portion 8 and the cavity portion 5 of the second engagement feature portion 8 is 1:2. The brace portion 4 of the second engagement feature portion 8 is preferably a flat surface, but may also be a camber surface or a concave surface.

[0022] As shown in FIG. 4, the connector part 31 is defined as the meeting point of the cavity part 5 and the brace part 4 of the first engaging feature part 7, and also as the meeting point of the cavity part 5 and the brace part 4 of the second engaging feature part 8. Depending on different embodiments of the present invention, the connector part 31 may be a sharp point or a smooth point (curved part) according to the user's preference. Further, the connector part 31 is preferably a convex segment and faces away from the rotation axis 2. However, the connector part 31 may be a flat segment, or a concave segment, or may be connected to the brace part 4 at an obtuse angle as shown in FIG. 5. The connector part 31 is an element that newly improves the relationship between the flat brace part 4 and the cavity part 5, and the connector part 31 provides an additional engaging surface for the user. The additional engaging surface defined as the connector part 31 provides the user with the option to change the tool to a sharp connector part 31 for a larger grip. Alternatively, the radial flat surface or concave surface provides the user with a larger surface contact when torque is applied.

[0023] Furthermore, as shown in FIG. 4, the first bisecting angle 17 of the present invention is defined between the connector part 31 of the first engaging feature part 7 and the bisecting line 6. Depending on different embodiments of the present invention, the first bisecting angle 17 may be an acute angle, a right angle, or an obtuse angle.

[0024] Furthermore, as shown in FIG. 4, the second bisecting angle 18 of the present invention is defined between the connector part 31 of the second engaging feature part 8 and the bisecting line 6. Depending on different embodiments of the present invention, the second bisecting angle 18 may be an acute angle, a right angle, or an obtuse angle.

[0025] Due to the angular positional relationship between the first bisecting angle 17 and the second bisecting angle 18, when a virtual straight line is drawn between the connector part 31 of the first engaging feature part 7 and the connector part 31 of the second engaging feature part 8, the virtual straight line will be perpendicular to the bisecting line 6.

[0026] Furthermore, the first bisector angle 17 and the second bisector angle 18 combine to form an angle less than 180 degrees when the first virtual line is drawn parallel to the brace portion 4 of the first engagement feature portion 7 and intersects it through the connector portion 31 of the first engagement feature portion 7, and the second virtual line is drawn parallel to the brace portion 4 of the second engagement feature portion 8 and intersects it through the connector portion 31 of the first engagement feature portion 7.

[0027] Furthermore, the brace portion 4 of the first engagement feature portion 7 and the brace portion 4 of the second engagement feature portion 8 are offset from each other. More specifically, the present invention further includes a first geometric plane and a second geometric plane. The first geometric plane is located parallel to the brace portion 4 of the first engagement feature portion 7, and the second geometric plane is located parallel to the brace portion 4 of the second engagement feature portion 8, with the first and second geometric planes being offset from each other. In other words, in the present invention, the first and second geometric planes are not coplanar. More specifically, the brace portion 4 of the first engagement feature portion 7 and the brace portion 4 of the second engagement feature portion 8 are not aligned with each other. Furthermore, the geometric plane of the brace portion 4 is preferably not aligned with the plane of the fastener brace surface of the female and male versions of the present invention.

[0028] Furthermore, as shown in Figure 6, the radial distance 35 at the intersection 34 is 4 to 12 times the first length 36 of the brace portion 4 of the first engagement feature portion 7 or the second length 37 of the brace portion 4 of the second engagement feature portion 8. Furthermore, as shown in Figure 7, the radial distance 35 at the intersection 34 is greater than the radial distance 38 of the connector portion 31 connected to the brace surface 4 of the first engagement feature portion 7 and the radial distance 39 of the connector portion 31 of the second engagement feature portion 8. In addition, as shown in Figure 7, the radial distance 38 is greater than the radial distance 40 of the connector portion 31 connected to the cavity portion 5 of the first engagement feature portion 7, and the radial distance 39 is greater than the radial distance 41 of the connector portion 31 connected to the cavity portion 5 of the second engagement feature portion 8.

[0029] As shown in Figures 3 and 8, preferably, the number of pairs of engagement features 3 that contact the fastener head is 6, since 6 pairs of engagement features 3 correspond to 12 single engagement features. The first angle 14 between the first engagement features 7 is 30 degrees, and the second angle 15 between the second engagement features 8 is 30 degrees. Furthermore, as shown in Figure 3, the third angle 16 between each of the pairs of engagement features 3 is in the range of 121 to 179 degrees. As a result, the angular direction between each of the pairs of engagement features 3 can be changed according to different embodiments of the present invention. More specifically, in some embodiments of the present invention, the third angle 16 can be 130 degrees. In some other embodiments of the present invention, the third angle 16 can be 135 degrees. In some yet another embodiment of the present invention, the third angle 16 can be 145 degrees. In some yet another embodiment of the present invention, the third angle 16 can be 150 degrees.

[0030] In some embodiments of the present invention, the multiple pairs of engagement features 3 may be tapered so as to move away from the rotation axis 2. In other words, the outer diameter of the multiple pairs of engagement features 3 near the upper surface of the torque tool body 1 may be smaller than the outer diameter of the multiple pairs of engagement features 3 near the attachment body 10. Furthermore, the cavity 5 of the first engagement feature 7 and the cavity 5 of the second engagement feature 8 may become narrower and shallower as they move from the upper surface of the torque tool body 1 toward the attachment body 10.

[0031] Even if the cavity portion 5 of the first engagement feature portion 7 and the cavity portion 5 of the second engagement feature portion 8 collectively define a circular contour, the present invention is not limited to a circular contour and may have other types of geometric shapes. For example, the cavity portion 5 of the first engagement feature portion 7 and the cavity portion 5 of the second engagement feature portion 8 may define a triangular contour within the corresponding brace portion 4.

[0032] To remove a damaged or detached fastener using the present invention, the torque tool body 1 is positioned around the damaged or detached fastener, so that most of the multiple pairs of engaging features 3 are positioned around or inside the fastener head. The user can then rotate and remove the damaged or detached fastener simply by applying torque to the torque tool body 1. When torque is applied to the torque tool body 1, the multiple pairs of engaging features 3 "bite" the lateral surfaces of the fastener head, resulting in the rotation of the damaged or detached fastener. The present invention is designed to engage with partially or completely damaged fastener heads. By using multiple pairs of engaging features 3, the present invention overcomes the slippage of the fastener head.

[0033] The present invention can drive corresponding lobular fasteners such as Torx® through the cavity 5 of the first engagement feature 7 and the cavity 5 of the second engagement feature 8, and can also drive the fastener through the brace 4 of the first engagement feature 7 and the brace 4 of the second engagement feature 8 on the outer brace surface of the socket fastener.

[0034] It should be understood that in alternative embodiments including all the components of the present invention, a female version of this embodiment can be created by mirroring the original. In other words, the female version of the present invention is a female embodiment that incorporates all the features, functions, and elements of the present invention. The engaging features of the female embodiment engage with the side or side wall of the male fastener. The projection of the male screwdriver tool is oriented away from the rotation axis 2, whereas the projection of the female screwdriver tool is oriented toward the rotation axis 2. Specifically, in the male embodiment, the brace portion 4 and connector portion 31 in Figures 1 to 7 are oriented away from the rotation axis 2, whereas in the female embodiment, the brace portion 4 and connector portion 31 in Figures 8 to 8 are oriented toward the rotation axis 2.

[0035] In this invention, in the multiple pairs of engagement feature parts 3, the lengths of the brace part 4 and the cavity part 5, and the corresponding angles between the brace part 4 and the cavity part 5 may be changed in order to create a sharper, tooth-like shape. Specifically, the length of the brace part 4 of the first engagement feature part 7 may be greater than the length of the brace part 4 of the second engagement feature part 8, or the length of the brace part 4 of the second engagement feature part 8 may be greater than the length of the brace part 4 of the second engagement feature part 7, allowing for the creation of a sharp and aggressive engagement or a less aggressive, blunt engagement, depending on the user's preference. The first engagement feature part 7 is any feature part within the multiple pairs of engagement feature parts 3, and the second engagement feature part 8 is a feature part located directly next to the first engagement feature part 7 within the corresponding multiple pairs of engagement feature parts 3. More specifically, the cavity portion 5 of the first engagement feature portion 7 is adjacent to and connected to the cavity portion 5 of the second engagement feature portion 8. As shown in Figures 8 to 9, the intersection 34 is identified as the meeting point of two engagement feature portions 3 of a pair of engagement feature portions 3. In other words, any pair of engagement feature portions 32 within the pair of engagement feature portions 3 and adjacent pairs of engagement feature portions 33 within the pair of engagement feature portions 3 are connected to each other via the intersection 34. Depending on different embodiments of the present invention, the intersection 34 may be a sharp point or a curved portion resembling a small radius. In some embodiments, the intersection 34 may comprise a third segment, which is preferably a straight portion connected between a pair of engagement feature portions 3 of any brace portion 4 and an adjacent brace portion 4. Furthermore, as shown in Figure 8, the radial distance 35 of the intersection 34 is 4 to 12 times the first length 36 of the first engagement feature 7 relative to the brace portion 4 or the second length 37 of the second engagement feature 8 relative to the brace portion 4. Furthermore, as shown in Figure 8, the radial distance 35 of the intersection 34 is smaller than the radial distance 42 of the connector portion 31 of the first engagement feature 7 and / or the radial distance 43 of the connector portion 31 of the second engagement feature 8. The connector portion 31 is defined as the meeting point of the cavity portion 5 and the brace portion 4 of the first engagement feature 7, and also as the meeting point of the cavity portion 5 and the brace portion 4 of the second engagement feature 8.Depending on different embodiments of the present invention, the connector portion 31 may be a sharp point or a smooth point (curved portion), depending on the user's preference. In some embodiments, the bracing surface 4, the connector portion 31, and the first portion of the cavity portion 5 are continuous and aligned. Furthermore, the connector portion 31 is preferably a convex segment and oriented in the direction of the axis of rotation 2. However, the connector portion 31 can also be a flat segment, a concave segment, or connect to the bracing portion 4 at an obtuse angle as shown in Figure 8. The connector portion 31 provides a novel improvement in compatibility between the flat bracing portion 4 and the cavity portion 5, and the connector portion 31 provides the user with an additional engagement surface. The additional engagement surface defined as the connector portion 31 provides the user with the option to change the tool to a sharp connector portion for a greater grip. Alternatively, radial, flat, or concave surfaces provide the user with greater surface contact when torque is applied.

[0036] As shown in Figures 8 and 9, the cavity portion 5 of the first engagement feature portion 7 and the cavity portion 5 of the second engagement feature portion 8 are oriented away from the axis of rotation 2 and collectively define a radial contour. This contour is preferably partially circular or elliptical, but may also be angular, such as a triangle, trapezoid, or quadrilateral, and is not limited to these shapes. The cavity portion 5 may be formed by joining together shapes, or, if preferable for manufacturing, the shapes or components may be joined together in a radial profile. The brace portion 4 of the first engagement feature portion 7 and the brace portion 4 of the second engagement feature portion 8 are positioned opposite each other with respect to the cavity portion 5 of the first engagement feature portion 7 and the cavity portion 5 of the second engagement feature portion 8, and are oriented toward the axis of rotation 2. In other words, the cavity portion 5 of the first engagement feature portion 7 and the cavity portion 5 of the second engagement feature portion 8 are positioned adjacent to each other between the brace portion 4 of the first engagement feature portion 7 and the brace portion 4 of the second engagement feature portion 8. In some embodiments of the present invention, the multiple pairs of engagement feature portions 3 may be tapered so as to move away from the rotation axis 2. That is, the outer diameter of the multiple pairs of engagement feature portions 3 near the upper surface of the torque tool body 1 is larger than the outer diameter of the multiple pairs of engagement feature portions 3 near the attachment body 10. Furthermore, as shown in Figures 8 and 9, the brace portion 4 of the first engagement feature portion 7 and the brace portion 4 of the second engagement feature portion 8 are positioned offset from each other. More specifically, the present invention further includes a first geometric plane and a second geometric plane. The first geometric plane is positioned parallel to the brace portion 4 of the first engagement feature portion 7, and the second geometric plane is positioned parallel to the brace portion 4 of the second engagement feature portion 8, with the first and second geometric planes offset from each other. In other words, in the present invention, the first and second geometric planes do not lie on the same plane. Specifically, the brace portion 4 of the first engagement feature portion 7 and the brace portion 4 of the second engagement feature portion 8 are not aligned with each other.

[0037] Since all components are part of the whole invention in either the female or male configuration, please understand that all components described in this specification according to the male configurations in Figures 1 to 7 are also applicable to the female configurations in Figures 8 to 9, even if they are not explicitly described as relating to Figures 8 to 9. Furthermore, please understand that components described relating to Figures 8 to 9 are also applicable to Figures 1 to 7.

[0038] In Figures 1 to 9, in some embodiments, the brace surface 4 may include discontinuous sidewalls. The discontinuous sidewalls may be arranged between a plurality of sidewalls having a plurality of pairs of engagement features 3. The discontinuous sidewalls may be arranged alternately between the plurality of pairs of engagement features 3, or on opposite sides of each of the plurality of pairs of engagement features 3. The plurality of discontinuous sidewalls may further be a plurality of continuous discontinuous sidewalls. In other words, a plurality of discontinuous sidewalls may be arranged continuously between a plurality of pairs of engagement features 3. The discontinuous sidewalls are preferably flat surfaces.

[0039] While 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 claimed below.

Claims

1. Torque tool body and Multiple pairs of engaging features, Including multiple intersections, Each of the aforementioned multiple intersections has a pointed shape, Each of the aforementioned pairs of engagement feature portions includes a first engagement feature portion and a second engagement feature portion. The cross-sections of the first engagement feature portion and the second engagement feature portion each include a brace portion, a cavity portion, and a connector portion, respectively. The brace portion is flat, The aforementioned plurality of pairs of engagement features are distributed radially around the rotation axis of the torque tool body. The brace portion and the cavity portion are connected to each other adjacent to each other by the connector portion. The radial distance of the connector portion connected to the brace portion is greater than the radial distance of the connector portion connected to the cavity portion. The connector portion is a convex segment, and is oriented away from the axis of rotation. The length of the connector portion is shorter than the length of the brace portion. The cavity portion of the first engagement feature is connected adjacent to the cavity portion of the second engagement feature, The cavity portion of the first engagement feature and the cavity portion of the second engagement feature are oriented in the direction of the rotation axis. The brace portion of the first engagement feature and the brace portion of the second engagement feature are arranged facing each other with respect to the cavity portion of the first engagement feature and the cavity portion of the second engagement feature. Any pair of engagement feature portions among the plurality of pairs of engagement feature portions and an adjacent pair of engagement feature portions are connected to each other via corresponding intersections among the plurality of intersections. The radial distance of one of the plurality of intersections is greater than the radial distance of each point of the connector portion of the first engagement feature portion in the same cross-section as one of the plurality of intersections. The radial distance of one of the plurality of intersections is greater than the radial distance of each point of the connector portion of the second engagement feature portion in the same cross-section as one of the plurality of intersections. Anti-slip fastener removal tool.

2. The first angle between the first engagement feature portions is 30 degrees, and the second angle between the second engagement feature portions is 30 degrees. The anti-slip fastener removal tool according to claim 1.

3. The third angle between each of the multiple pairs of engaging features is in the range of 121 to 179 degrees. The anti-slip fastener removal tool according to claim 1.

4. The third angle is 130 degrees. The anti-slip fastener removal tool according to claim 3.

5. The third angle is 135 degrees. The anti-slip fastener removal tool according to claim 3.

6. The third angle is 145 degrees. The anti-slip fastener removal tool according to claim 3.

7. The third angle is 150 degrees. The anti-slip fastener removal tool according to claim 3.

8. The torque tool body extends outward from the rotation axis to the plurality of pairs of engaging features, The anti-slip fastener removal tool according to claim 1.

9. The first length ratio between the brace portion and the cavity portion of the first engagement feature is 1:

2. The anti-slip fastener removal tool according to claim 1.

10. The ratio of the second length between the brace portion and the cavity portion of the second engagement feature is 1:

2. The anti-slip fastener removal tool according to claim 1.

11. The radial distance of the intersection is 4 to 12 times the first length of the brace portion of the first engagement feature. The anti-slip fastener removal tool according to claim 1.

12. The radial distance of the intersection is 4 to 12 times the second length of the brace portion of the second engagement feature. The anti-slip fastener removal tool according to claim 1.

13. The brace portion of the first engagement feature and the brace portion of the second engagement feature are arranged offset from each other. The anti-slip fastener removal tool according to claim 1.

14. Including the attachment body, The attachment body is centrally positioned around and along the rotation axis, The attachment body is connected adjacent to the torque tool body. The anti-slip fastener removal tool according to claim 1.

15. Includes an engagement bore, The torque tool body extends inward from the outer wall of the torque tool body to the plurality of pairs of engaging features, The engagement bore extends along the axis of rotation, on the side opposite to the torque tool body, and traverses within the attachment body. The anti-slip fastener removal tool according to claim 14.

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