TWI848181B - Anti-slip torque tool - Google Patents

Abstract

An anti-slip torque tool that utilizes a plurality of grooves to prevent slippage and facilitate torque transfer to a fastener. The tool includes a wrench torque-tool body and an at least one engagement element. The wrench torque-tool body includes a plurality of internal sidewalls, a first base, and a second base. Further, each of the internal sidewalls includes a bracing surface. The engagement element includes a first pair of grooves and a second pair of grooves, wherein each further includes a primary cavity and a secondary cavity. The engagement element is laterally integrated into a specific sidewall to provide additional gripping action. The first pair of grooves and the second pair of grooves are positioned offset from each other, along the bracing surface of the specific sidewall. The primary cavity and the secondary cavity each traverse normal and into the bracing surface from the first base to the second base.

Description

Anti-slip torque tool

The present invention relates to a tool for locking and loosening fasteners (such as screws and nuts). In particular, the present invention is an anti-slip torque tool, which is not prone to slippage when locking screws, nuts, and other similar fasteners by means of two sets of engaging teeth.

Hexagonal bolts, nuts, screws, and other similar threaded devices are used to secure multiple workpieces together by engaging complementary threads, such as male or female threads. These types of fasteners are typically constructed with a cylindrical shaft, an external thread on the surface of the shaft, and a head at one end of the shaft. The external thread is combined with a complementary female thread tapped into a hole or nut to secure the fastener and join the workpieces together. The head of the fastener is a means for rotating or driving the fastener into the female thread. The head of the fastener is specially shaped to allow an external tool, such as a screwdriver, to apply torque to the fastener so that the fastener engages the female thread to a certain extent. These fasteners are simple, cheap and effective, so they are widely used in modern industry.

One of the common problems when using this type of fastener is that the tool often slips on the head, whether the fastener is male or female. The reasons may be: tool or fastener wear, tool or fastener rust, over-tightening of the fastener, and damage to the head of the fastener.

The present invention is a wrench or wrench socket design that can substantially eliminate slippage. The present invention uses multiple recessed areas on the inner wall of the socket to ensure significant contact between the tool and the head of the fastener. The present invention can save the user from using a screw extractor that requires drilling and tools.

The present invention is a non-slip torque tool for tightening or loosening fasteners, such as screws and nuts. In traditional wrench and wrench socket designs, most of the torque is transferred to the fastener via the side edges of the fastener head. As the use time increases, the wear and degradation of the side edges will reduce the efficiency of transferring torque from the wrench to the fastener head and cause slippage. In order to overcome the above problems, the present invention combines grooves on the side of the torque tool. In this way, regardless of whether the fastener head has wear and degradation, an additional clamping or bite point can be provided for the fastener head.

The present invention uses a plurality of sets of engaging teeth and protrusions to engage the side surface of the head of a fastener (including fasteners that are damaged or in other conditions) to effectively transmit torque to the fastener. These multiple sets of engaging teeth can increase the gripping force of the torque tool on the head of the fastener. The present invention can be combined with various general tools, or used by various general tools, to increase the torque transmitted to the fastener. General tools include but are not limited to: open-end wrenches, adjustable wrenches, pipe pliers, socket wrenches, plumber's wrenches, and other similar fastener engaging tools. The present invention is compatible with fasteners using male heads. Fasteners using male heads, also known as male fasteners, use the outer side surface of the fastener head to engage with the tool for locking or loosening. Such fasteners include hexagonal bolts and nuts. The present invention is also compatible with right-hand threaded fasteners as well as left-hand threaded fasteners. The present invention can also be modified or designed to accommodate fasteners of different types and sizes.

The following is a detailed description through specific embodiments and the attached drawings, which will make it easier to understand the purpose, technical content, features and effects achieved by the present invention.

1: Wrench torque tool body

2: Medial wall

3: First side edge

4: Second side edge

5: Clamping surface

6: Specific sidewalls

7: Relative side wall

8: Middle side wall

9: Cross section

10: Any side wall

11: Adjacent to the side wall

12: Cross section

13: First base surface

14: Second base surface

15: Pivot

16: Occlusal element

17: The first pair of grooves

18: The second pair of grooves

19: Main groove

20: Depth

21: Section

22: Secondary groove

23: Depth

24: Section

25: Main protrusions

26: Secondary protrusions

27: Attachment body

28: Binding hole

29: Wrench handle

30: Receiving port

40: First groove

41: Second groove

42: The third groove

43: Fourth groove

50: First Depth

51: Second Depth

Figure 1 is a perspective view of the present invention.

Figure 2 is an enlarged view of the upper part of the present invention.

Figure 3 is a detailed diagram of the present invention within the scope of ellipse 3 in Figure 2.

Figure 4 is a detailed diagram of the present invention within the scope of the ellipse 4 in Figure 2.

Figure 5 is a detailed diagram of the present invention within the scope of the ellipse 5 in Figure 2.

Figure 6 is a detailed diagram of the main groove and the secondary groove of another embodiment of the present invention.

FIG7 is a detailed diagram of the main groove and the secondary groove of another embodiment of the present invention. .

Figure 8 is a perspective view of another embodiment of the present invention.

Figure 9 is a bottom perspective view of another embodiment of the present invention.

Figure 10 is a top view of another embodiment of the present invention.

Figure 11 is a detailed diagram within the range of circle 11 in Figure 10.

Figure 12 is a top view of another embodiment of the present invention. .

First of all, it should be specially pointed out that the drawings used in this specification are only used to illustrate certain embodiments of the present invention, and the scope of the present invention is not limited by these drawings.

Please refer to Figure 1. The present invention includes: a wrench torque tool body 1 and at least one engaging element 16. The wrench torque tool body 1 is a physical structure for applying torque to the head of a fastener. In one embodiment of the present invention, the wrench torque tool body 1 is a tubular protrusion, and its size is designed to be able to cover the fastener in an interlocking manner, basically it is a wrench socket. The wrench torque tool body 1 includes: a plurality of inner side walls 2, a first base surface 13, and a second base surface 14. The length, width, and diameter of the wrench torque tool body 1 can be varied to match fasteners of different sizes. The plurality of inner side walls 2 define a hole for accommodating the head of the fastener, and the shape of the hole has a complementary relationship with the shape of the fastener to be combined. In one embodiment of the present invention, a plurality of inner side walls 2 are radially distributed on the wrench torque tool body 1. Each of the plurality of inner side walls 2 includes: a first side edge 3, a second side edge 4, and a clamping surface 5.

The bite element 16 is used to prevent slippage between the wrench torque tool body 1 and the fastener head. The bite element 16 has a tooth-shaped feature, which is combined with a specific side wall 6 among the multiple inner side walls 2, and this specific side wall 6 represents any one of the multiple inner side walls 2. Please refer to Figures 1 and 2. The bite element 16 includes: a first pair of grooves 17 and a second pair of grooves 18. The first pair of grooves 17 and the second pair of grooves 18 are separated from each other along the clamping surface 5 of the specific side wall 6, and define an bite tooth therebetween. Each pair of the first pair of grooves 17 and the second pair of grooves 18 each includes: a main groove 19 and a secondary groove 22. The main groove 19 and the secondary groove 22 each vertically penetrate the clamping surface 5 of the specific side wall 6. In addition, the main groove 19 and the secondary groove 22 each pass through the wrench torque tool body 1 from the first base surface 13 to the second base surface 14. In this way, it can be ensured that the engaging teeth extend along a pivot 15 of the wrench torque tool body 1.

The design of the present invention is to provide multiple engagement points in both the clockwise and counterclockwise directions. For the best efficiency of engagement and to achieve a symmetrical design, it is preferred that the first pair of grooves 17 and the second pair of grooves 18 are located between the first side edge 3 and the second side edge 4 of the specific side wall 6. Although the first pair of grooves 17 and the second pair of grooves 18 can also be implemented at other positions, the decisive factor is that the engagement teeth of the clamping surface 5 are located between the first pair of grooves 17 and the second pair of grooves 18, wherein the first pair of grooves 17 and the second pair of grooves 18 are located at a position that can clamp and engage the side of a male fastener head. Furthermore, the first pair of grooves 17 and the second pair of grooves 18 are symmetrical to each other. In more detail, the main groove 19 of the first pair of grooves 17 is adjacent to the main groove 19 of the second pair of grooves 18, as shown in FIG3. Therefore, the first pair of grooves 17 and the second pair of grooves 18 form a mirror image relationship along the midline of the clamping surface 5 of the specific side wall 6. Such a design can form a symmetrical bite tooth, which can provide a bite force to the head of the fastener in the clockwise direction and the counterclockwise direction. Moreover, when combined with a positive hexagonal fastener, it is preferred that the clamping surface 5 of the specific side wall 6 is combined in the center of the positive hexagonal fastener, wherein the clamping surface 5 is located between the first pair of grooves 17 and the second pair of grooves 18.

Please refer to Figures 2 and 3 again. The first pair of grooves 17 and the second pair of grooves 18 are designed to have the minimum stress points. In more detail, the entire cross-section 21 of the main groove 19 is preferably a partially circular cross-section, wherein the partially circular cross-section is concave inwardly from the direction of the line connecting the first side edge 3 and the second side edge 4 of the specific side wall 6. Similarly, the entire cross-section 24 of the secondary groove 22 is preferably a partially circular cross-section, wherein the partially circular cross-section is concave inwardly from the direction of the line connecting the first side edge 3 and the second side edge 4 of the specific side wall 6. Therefore, each of the main groove 19 and the secondary groove 22 has the minimum number of possible high stress points, and the durability and service life of the present invention are thus improved. The depth, size, position, direction, and curvature of the primary groove 19 and the secondary groove 22 can be changed according to the user's preferences and needs.

In a preferred embodiment of the present invention, the clamping surface 5 of the specific side wall 6 and the first pair of grooves 17 are adjacent to a rounded corner; the clamping surface 5 of the specific side wall 6 and the second pair of grooves 18 are also adjacent to a rounded corner. However, the clamping surface 5 of the specific side wall 6 and the first pair of grooves 17 may also be adjacent to a sharper corner; the clamping surface 5 of the specific side wall 6 and the second pair of grooves 18 may also be adjacent to a sharper corner.

Please refer to Figure 3 again. The first pair of grooves 17 and the second pair of grooves 18 are designed to have the most obvious gripping force, and include: a first gripping point and a second gripping point. The first gripping point and the second gripping point are formed by the configuration and position of the main groove 19 and the secondary groove 22. The main groove 19 and the secondary groove 22 partially intersect. The first gripping point is formed in the intersection area of the main groove 19 and the secondary groove 22. The second gripping point is formed in the intersection area of the main groove 19 and the clamping surface 5 (especially the bite tooth) of the specific side wall 6. Moreover, the second gripping point and the first gripping point are opposite to each other across the main groove 19. Depending on the wear and degradation of the fastener head, three different contact points are used to transmit torque to the fastener head. Therefore, if the head of the fastener is not worn, the clamping surfaces 5 of the plurality of inner side walls 2 apply torque to the head of the fastener. If the head of the fastener is partially worn, a coupling angle of the head of the fastener will slide over the specific side wall 6 and fall into the secondary groove 22 of the first pair of grooves 17 and couple to the first gripping point of the first pair of grooves 17. If the coupling angle couples to the second pair of grooves 18, a similar process will occur.

According to the three different contact points, the present invention can provide three different configurations for the main groove 19 and the secondary groove 22. In a preferred embodiment of the present invention, the depth 23 of the secondary groove 22 is equal to the depth 20 of the main groove 19, as shown in FIG3. However, in some embodiments of the present invention, the depth 23 of the secondary groove 22 is greater than the depth 20 of the main groove 19, as shown in FIG6. In some embodiments of the present invention, the depth 23 of the secondary groove 22 is less than the depth 20 of the main groove 19, as shown in FIG7.

Furthermore, each of the main groove 19 and the secondary groove 22 further includes a first side surface, a second side surface, and a base surface. In more detail, the first side surface is opposite to the second side surface across the base surface. The intersection between the surfaces can be a sharp angle point or an arc point. In the present invention, these intersections can also serve as additional clamping points. The first side surface is selected from the following group: a plane, a concave surface, and a convex surface, so that the overall contour of the main groove 19 and the secondary groove 22 is different from the first side surface. The second side surface is selected from the following group: a plane, a convex surface, and a concave surface, so that the overall contour of the main groove 19 and the secondary groove 22 is different from the second side surface. The base surface is selected from the following group: a plane, a convex surface, and a concave surface, so that the overall profile of the main groove 19 and the secondary groove 22 is different from the base surface. If it is for the convenience of manufacturing, price factors, or for good structural strength and performance, the main groove 19 and the secondary groove 22 can be formed with only two side surfaces, so that the overall profile is a V-shape or a triangle.

If the head of the fastener is significantly worn or rounded, the engagement angle of the fastener will slide over the specific side wall 6 and the first gripping point and hit the second gripping point of the first pair of grooves 17. A similar process will occur if the engagement angle is engaged with the second pair of grooves 18. The engagement angle is a specific angle of the head of the fastener that is closest to the first pair of grooves 17 or the second pair of grooves 18. In a preferred embodiment of the present invention, the intersection point of the main groove 19 and the secondary groove 22 is not on the same straight line as the clamping surface 5 of the specific side wall 6, as shown in Figure 3. However, in other embodiments of the present invention, the intersection point of the main groove 19 and the secondary groove 22 can be on the same straight line as the clamping surface 5 of the specific side wall 6.

Please refer to Figure 2 again. In one embodiment of the present invention, the engaging element 16 further includes a set of main protrusions 25. Each of the main protrusions 25 has a saw-like feature, which is designed to provide an additional clamping point. The size, depth, design, and number of the main protrusions 25 can be changed. The main protrusions 25 are located between the first pair of grooves 17 and the first side edge 3 of the specific side wall 6. In more detail, the main protrusions 25 are a plurality of saw teeth sequentially distributed between the first side edge 3 and the first pair of grooves 17 of the specific side wall 6. The main protrusions 25 are coupled to the clamping surface 5 of the specific side wall 6. Furthermore, each of the set of main protrusions 25 extends from the first base surface 13 to the second base surface 14 to ensure proper surface contact between the set of main protrusions 25 and the head of the fastener. The embodiment of FIG. 2 is preferably used for an open-end wrench that rotates in a clockwise direction. If necessary, this embodiment can also be designed without the main protrusions 25.

The plurality of inner side walls 2 are designed to further promote the engagement between the fastener head and the engagement element 16. The plurality of inner side walls 2 further include: an arbitrary side wall 10 and an adjacent side wall 11, wherein the arbitrary side wall 10 represents any one of the plurality of inner side walls 2. Preferably, the arbitrary side wall 10 is adjacent to the adjacent side wall 11 via a curved corner. Therefore, the corner between the plurality of inner side walls 2 has a certain angle of curvature, and this angle can be changed as needed or as preferred by the user. In a more extreme example, the curved corner is implemented by a semicircular hole passing through the wrench torque tool body 1, as shown in FIG. 1 . In other embodiments of the present invention, any side wall 10 is adjacent to an adjacent side wall 11 by a sharp corner. Therefore, the corners between the plurality of inner side walls 2 have a certain angle of curvature, and this angle can be changed as needed or as the user prefers. Another feature of the present invention that promotes the engagement between the fastener head and the engaging element 16 is the curvature of each of the plurality of inner side walls 2. Please refer to FIG9. In more detail, the cross-section 12 of each of the plurality of inner side walls 2 is preferably a partially circular section, wherein the partially circular section protrudes from the first side edge 3 to the second side edge 4. The engagement point of the engagement element 16 is located close to the pivot 15 and therefore close to the side of the fastener head. In other embodiments of the present invention, the plurality of inner side walls 2 are planes.

Please refer to Figure 1 again. In one embodiment, the anti-slip torque tool of the present invention is an open-end wrench with multiple clamping features. Please refer to Figures 2 to 5 again. The anti-slip torque tool of this embodiment includes: a wrench torque tool body 1, a bite element 16, a fastener receiving port 30, a wrench handle 29, a first groove 40, a second groove 41, a third groove 42, a fourth groove 43, and a set of secondary protrusions 26. In this embodiment, the bite element 16 also includes a set of primary protrusions 25. This set of secondary protrusions 26 can provide more clamping points. In more detail, the set of secondary protrusions 26 is located on an opposing side wall 7 among the plurality of inner side walls 2, wherein the opposing side wall 7 is on the opposite side of the specific side wall 6 across the wrench torque tool body 1 and is parallel to the specific side wall 6. The set of secondary protrusions 26 is combined with the clamping surface 5 of the opposing side wall 7, and each of the secondary protrusions 26 extends from the first base surface 13 to the second base surface 14. In this way, the present invention can provide clamping points on both sides of the fastener. In this embodiment, the plurality of inner side walls 2 are manufactured to have the maximum bite force and clearance. Moreover, among the plurality of inner side walls 2, there is an intermediate side wall 8 located between the specific side wall 6 and the opposing side wall 7 and perpendicular to the specific side wall 6 and the opposing side wall 7. The middle side wall 8 is recessed inwardly to provide a clearance for the fastener head, so as to increase the chance of the engaging element 16 engaging the fastener head. Please refer to FIG4. In more detail, the cross section 9 of the middle side wall 8 is a partially circular section, wherein the partially circular section is recessed along the first side edge 3 to the second side edge 4 of the middle side wall 8. Furthermore, as described above, the specific side wall 6 and the opposite side wall 7 are structures that protrude outward, or structures that are partially protruding and partially flat, so that the engaging element 16 is close to the pivot 15, as shown in FIG5. In a preferred embodiment of the present invention, the clamping surface 5 of the opposite side wall 7 has a plane near the center between the third groove 42 and the fourth groove 43, a small protrusion between the third groove 42 and the plane, and a small protrusion between the fourth groove 43 and the plane, and these small protrusions gradually become smaller from the plane. Therefore, the vertical distance between the clamping surface 5 of the specific side wall 6 between the first pair of grooves 17 and the second pair of grooves 18 and the plane of the clamping surface 5 of the opposite side wall 7 is smaller than the vertical distance between the first groove 40 and the third groove 42, or smaller than the vertical distance between the second groove 41 and the fourth groove 43.

The wrench handle 29 is connected to the outer side of the wrench torque tool body 1 to act as a lever arm to increase the torque applied to the fastener. The length of the wrench handle 29 can vary with the torque required to remove the fastener; the longer the wrench handle 29, the greater the torque generated, and the shorter the wrench handle 29, the smaller the torque. The shape, design, and material composition of the wrench handle 29 can be varied to suit the needs of the user. For example, pads can be added to different parts of the wrench handle 29 to change the grip characteristics, allowing the user to use the invention more easily and comfortably.

Please refer to Figure 8. In one embodiment of the present invention, the at least one bite element 16 mentioned above includes a plurality of bite elements 16. This can provide the present invention with a stronger bite ability. Please refer to Figure 10. The plurality of bite elements 16 are distributed around the axis 15, and each of the plurality of bite elements 16 is combined with a corresponding side wall among the plurality of inner side walls 2. The number of the plurality of bite elements 16 and the number of the plurality of inner side walls 2 can be varied. In one embodiment of the present invention, the number of the plurality of bite elements 16 is equal to the number of the plurality of inner side walls 2. In another embodiment of the present invention, the plurality of bite elements 16 are formed between every two inner side walls 2, as shown in Figure 8. In one embodiment shown in FIG. 12 , each of the plurality of engaging elements 16 includes a set of main protrusions 25 .

The present invention also includes an attachment feature that allows an external torque tool to be attached to the torque tool body 1 to increase the torque applied to the fastener. Please refer to Figure 9. The present invention further includes: an attachment body 27, and a coupling hole 28, which allows an external torque tool, such as a socket wrench or a ratchet, to be attached to the torque tool body 1. The center of the attachment body 27 is on the pivot 15, and the attachment body 27 is distributed along the pivot 15, and its rotation axis overlaps with the pivot 15 of the torque tool body 1, as shown in Figure 8. In a preferred embodiment of the present invention, the attachment body 27 is a cylindrical design, and the diameter of the attachment body 27 is slightly larger than the diameter of the torque tool body 1. However, the diameter of the attachment body 27 can also be equal to or smaller than the diameter of the torque tool body 1. The coupling hole 28 is located relative to the torque tool body 1 and penetrates the attachment body 27 along the pivot 15. The shape of the coupling hole 28 is made to accept the positive attachment element of the socket wrench. Since most socket wrenches use square attachment elements, in one embodiment of the present invention, the coupling hole 28 is made into a square. In other embodiments of the present invention, the shape and design of the coupling hole 28 and the attachment body 27 can be changed to match different torque tools and their attachment means. In one embodiment of the present invention, only the attachment body 27 is used, wherein the shape of the attachment body 27 is made to match an external torque tool. For example, the attachment body 27 is made into a hexagon. However, the attachment body 27 can also be made into other geometric shapes.

In one embodiment of the present invention, the present invention further includes a fastener receiving opening 30 to form an open wrench. As shown in FIG. 1 , the fastener receiving opening 30 allows the present invention to engage the fastener head from the side, just like a conventional open wrench. The fastener receiving opening 30 passes through the torque tool body 1 in a direction perpendicular to the pivot 15, and the fastener receiving opening 30 is opposite to the wrench handle 29 and the middle side wall 8 across the torque tool body 1. In relation to the engaging element 16, the fastener receiving opening 30 is parallel to the specific side wall 6.

Please refer to Figure 3. The first groove 40 is located between the first side edge 3 of the specific side wall 6 and the first pair of grooves 17, and can be used to prevent the wear or slip of the fastener near the middle side wall 8. In more detail, the first groove 40 extends from the first base surface 13 to the second base surface 14, and vertically penetrates the clamping surface 5 of the specific side wall 6. When torque is applied to the fastener through the wrench handle 29, the first groove 40 does not contact the side surface of the fastener near the first side edge 3 of the specific side wall 6. In this way, the torque can be effectively transmitted to the fastener, and the slip or wear of the fastener can be prevented.

Please refer to Figure 3. The second groove 41 is located between the second side edge 4 of the specific side wall 6 and the second pair of grooves 18, and can be used to prevent the fastener from being worn or slipped near the fastener receiving port 30. In more detail, the second groove 41 extends from the first base surface 13 to the second base surface 14, and vertically penetrates the clamping surface 5 of the specific side wall 6. When torque is applied to the fastener through the wrench handle 29, the second groove 41 does not contact the side surface of the fastener near the second side edge 4 of the specific side wall 6. In this way, the torque can be effectively transmitted to the fastener, and the slippage or wear of the fastener can be prevented.

Please refer to Figure 5. The third groove 42 is located between the first side edge 3 of the opposite side wall 7 and the group of secondary protrusions 26, and can be used to prevent the wear or slip of the fastener near the middle side wall 8. In more detail, the third groove 42 extends from the first base surface 13 to the second base surface 14, and vertically penetrates the clamping surface 5 of the opposite side wall 7. When torque is applied to the fastener through the wrench handle 29, the third groove 42 does not contact the side surface of the fastener near the first side edge 3 of the opposite side wall 7. In this way, the torque can be effectively transmitted to the fastener, and the slip or wear of the fastener can be prevented.

Please refer to Figure 5. The fourth groove 43 is located between the second side edge 4 of the opposite side wall 7 and the clamping surface 5 of the opposite side wall 7, and can be used to prevent the wear or slip of the fastener near the middle side wall 8. In more detail, the fourth groove 43 extends from the first base surface 13 to the second base surface 14, and vertically penetrates the clamping surface 5 of the opposite side wall 7. When torque is applied to the fastener through the wrench handle 29, the fourth groove 43 does not contact the side surface of the fastener near the second side edge 4 of the opposite side wall 7. In this way, the torque can be effectively transmitted to the fastener, and the slip or wear of the fastener can be prevented.

In various embodiments of the present invention, the clamping surface 5 is selected from a group consisting of: a plane, a convex surface, a concave surface, and any combination thereof. In other words, depending on the positions of the engaging element 16, the first groove 40, and the second groove 41, the clamping surface 5 of a particular sidewall 6 can be a plane, a convex surface, a concave surface, or any combination thereof. Depending on the positions of the engaging element 16, the third groove 42, the fourth groove 43, and a set of secondary protrusions, the clamping surface 5 of the opposite sidewall 7 can be a plane, a convex surface, a concave surface, or any combination thereof. According to the radial configuration of the first side edge 3 and the second side edge 4 of the middle side wall 8, the clamping surface 5 of the middle side wall 8 can be a plane, a convex surface, a concave surface, or any combination thereof.

Each of the first groove 40, the second groove 41, the third groove 42, and the fourth groove 43 includes: a first side surface, a second side surface, and a base side surface. In more detail, the first side surface and the second side surface can be a protrusion, a recess, or a straight line. The base side surface is preferably a plane; toward the first pair of grooves 17, the second pair of grooves 18, the group of secondary protrusions 26, or the clamping surface 5 relative to the side wall 7, the plane gradually decreases from large to small. The first side surface is connected to the proximal end of the base side surface and is located at the fastener receiving port 30 or the middle side wall 8. The second side surface is connected to the distal end of the base side surface and is located at the clamping surface 5. In other words, the first depth 50 at the proximal intersection of the first side surface and the base side surface is greater than the second depth 51 at the distal end of the base side surface, wherein the base side surface is located at the clamping surface 5, as shown in FIG3. In other embodiments of the present invention, the base side surface may not be tapered but parallel, and may also be a concave or convex surface. For example, the first groove 40, the second groove 41, the third groove 42, and the fourth groove 43 may be a triangle, a circle, a partial circle, a trapezoid, a rectangle, a square, or other geometric shapes. By gradually decreasing the size of the first groove 40 and the second groove 41 (as shown in FIG. 3 ), or by gradually decreasing the size of the third groove 42 and the fourth groove 43 (as shown in FIG. 5 ), the present invention can provide a larger clearance for the side of the fastener, and this can prevent the fastener from being worn or slipped. In other words, when the fastener is coupled to the wrench, the clearance between the fastener side edge and the base side surfaces of the first groove 40, the second groove 41, the third groove 42, and the fourth groove 43 is greater than the clearance between the fastener side surface and the base side surfaces of the first groove 40, the second groove 41, the third groove 42, and the fourth groove 43.

Furthermore, the main protrusion 25 and the secondary protrusion 26 can be made into a triangle, a circle, a partial circle, a trapezoid, a rectangle, a square, or other possible geometric shapes. The peaks and valleys of the main protrusion 25 and the secondary protrusion 26 can be sharp or blunt.

In one embodiment of the present invention, the main groove 19 and the secondary groove 22 overlap to form a continuous groove, which can provide a larger space for the corner of the fastener head, which is very suitable for severely damaged fastener heads. In this embodiment, the main protrusion 25 is located between the first pair of grooves 17 and the second pair of grooves 18, so that a proper clamping force can be ensured between the fastener head and the present invention. In more detail, the main protrusion 25 extends from the first pair of grooves 17 to the second pair of grooves 18. In a preferred form of this embodiment, the present invention is an open-end wrench having a set of secondary protrusions 26. As mentioned above, this embodiment can be implemented in a socket wrench or an open-end wrench. In any embodiment of the present invention, the clamping surface 5, the first groove 40, the second groove 41, the third groove 42, and the fourth groove 43, the notch, the first pair of grooves 17, the second pair of grooves 18, the rounded corners, the sharp corners, and the offset can be made into sharp corners, general corners, or blunt corners.

The present invention has been described above by way of embodiments, but it should be understood that these embodiments are only used to illustrate the present invention, and are not used to limit the scope of the present invention. Any modification or change that does not deviate from the spirit of the present invention will still be included in the scope of the present invention.

1: Wrench torque tool body

2: Medial wall

3: First side edge

4: Second side edge

5: Clamping surface

6: Specific sidewalls

7: Relative side wall

8: Middle side wall

13: First base surface

14: Second base surface

15: Pivot

16: Occlusal element

17: The first pair of grooves

18: The second pair of grooves

25: Main protrusions

26: Secondary protrusions

29: Wrench handle

30: Receiving port

Claims (20)

A non-slip wrench-type tool, comprising: a wrench torque tool body; and at least one engaging element, wherein the wrench torque tool body further comprises: a plurality of inner side walls, a first base surface, and a second base surface; each of the plurality of inner side walls comprises: a first side edge, a second side edge, and a clamping surface; the engaging element comprises: a first pair of grooves, and a second pair of grooves; the plurality of inner side walls are distributed around a central axis of the wrench torque tool body; the engaging element is combined with a specific side wall among the plurality of inner side walls; the first pair of grooves and the second pair of grooves are separately arranged along the clamping surface of the specific side wall; each pair of the first pair of grooves and the second pair of grooves respectively comprises: a main groove and a secondary groove; the main groove and the secondary groove respectively vertically penetrate the clamping surface of the specific side wall; the main groove and the secondary groove respectively pass through the wrench torque tool body from the first base surface to reach the second base surface; the main groove of the first pair of grooves is adjacent to the main groove of the second pair of grooves; a wrench handle; the wrench handle is connected to the outer side of the wrench torque tool body; a fastener receiving port; The fastener receiving port penetrates the torque tool body from a direction perpendicular to the pivot axis; the fastener receiving port is opposite to the wrench handle across the torque tool body; the fastener receiving port is parallel to the specific side wall; the engaging element further comprises: a set of main protrusions; a set of secondary protrusions; the set of main protrusions is located between the first pair of grooves and the first side edge of the specific side wall; the set of main protrusions is combined with the clamping surface of the specific side wall; each of the set of main protrusions extends from the first base surface to the second base surface; the set of secondary protrusions is located on one of the plurality of inner side walls An opposing side wall; the opposing side wall is on the opposite side of the wrench torque tool body across the specific side wall and is parallel to the specific side wall; the group of secondary protrusions is combined with the clamping surface of the opposing side wall; the group of secondary protrusions is adjacent to the first side edge of the opposing side wall; each of the group of secondary protrusions extends from the first base surface to the second base surface; a third groove; the third groove is located between the first side edge of the opposing side wall and the group of secondary protrusions; the third groove vertically penetrates the clamping surface of the opposing side wall; the third groove extends from the first base surface to the second base surface. The anti-slip wrench-type tool as described in item 1 of the patent application further comprises: a first groove; wherein the first groove is located between the first side edge of the specific side wall and the first pair of grooves; the first groove vertically penetrates the clamping surface of the specific side wall; The first groove extends from the first base surface to the second base surface. The anti-slip wrench-type tool as described in item 1 of the patent application further comprises: a second groove; wherein the second groove is located between the second side edge of the specific side wall and the second pair of grooves; the second groove vertically penetrates the clamping surface of the specific side wall; the second groove extends from the first base surface to the second base surface. The anti-slip wrench-type tool as described in item 1 of the patent application further comprises: a fourth groove; wherein the fourth groove is located between the second side edge of the opposite side wall and the clamping surface of the opposite side wall; the fourth groove vertically penetrates the clamping surface of the opposite side wall; the fourth groove extends from the first base surface to the second base surface. As described in the first item of the patent application scope, the plurality of inner side walls include: a middle side wall located between the specific side wall and the opposite side wall, and perpendicular to the specific side wall and the opposite side wall; a cross section of the middle side wall is a partially circular section; the partially circular section is concave along the first side edge to the second side edge of the middle side wall. As described in the first item of the patent application scope, the plurality of inner side walls further include: an arbitrary side wall and an adjacent side wall; the arbitrary side wall is adjacent to the adjacent side wall via a curved corner. As described in the first item of the patent application scope, the plurality of inner side walls further include: an arbitrary side wall and an adjacent side wall; the arbitrary side wall is adjacent to the adjacent side wall through a sharp corner. As described in the first item of the patent application scope, the anti-slip wrench-type tool, wherein each of the plurality of inner side walls has a cross-section that is a partially circular section; the partially circular section protrudes from the first side edge to the second side edge. As described in item 1 of the patent application scope, the anti-slip wrench-type tool, wherein the depth of the secondary groove is greater than the depth of the main groove. As described in Item 1 of the patent application scope, the anti-slip wrench-type tool, wherein the main groove and the secondary groove partially intersect. As described in the first item of the patent application scope, the entire cross-section of the main groove is a partially circular cross-section; the partially circular cross-section is concave from the first side edge to the second side edge. As described in the first item of the patent application scope, the entire cross-section of the secondary groove is a partially circular cross-section; the partially circular cross-section is concave from the first side edge to the second side edge. As described in the first item of the patent application scope, the anti-slip wrench-type tool, wherein the engaging element further comprises a set of main protrusions; the set of main protrusions are located between the first pair of grooves and the first side edge of the specific side wall; the set of main protrusions are combined with the clamping surface of the specific side wall; each of the set of main protrusions extends from the first base surface to the second base surface. The anti-slip wrench-type tool as described in item 1 of the patent application scope, wherein the engaging element is located between the first side edge and the second side edge of the specific side wall. The anti-slip wrench-type tool as described in item 1 of the patent application scope, wherein the at least one engaging element is a plurality of engaging elements; the plurality of engaging elements are distributed around the axis; each of the plurality of engaging elements is combined with a corresponding side wall of the plurality of inner side walls. As described in the first item of the patent application scope, the anti-slip wrench-type tool, wherein the clamping surface is selected from a group including: a flat surface, a convex surface, a concave surface, and a combination of the above. The anti-slip wrench-type tool as described in item 1 of the patent application, wherein the clamping surface is adjacent to the first pair of grooves via a rounded corner. The anti-slip wrench-type tool as described in item 1 of the patent application, wherein the clamping surface is adjacent to the second pair of grooves via a rounded corner. The anti-slip wrench-type tool as described in item 1 of the patent application, wherein the clamping surface is adjacent to the first pair of grooves via a sharp angle. The anti-slip wrench-type tool as described in item 1 of the patent application, wherein the clamping surface is adjacent to the second pair of grooves via a sharp angle.

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