TWI805845B - Anti-slip fastener remover tool - Google Patents

Abstract

An anti-slip fastener remover tool includes a torque-tool body and a plurality of paired engagement features. The plurality of paired engagement features that grips the lateral surface of the stripped fastener head is radially positioned around a rotation axis of the torque-tool body. The plurality of paired engagement features, wherein each paired engagement feature is offset by 30 degrees, comprises a first engagement feature and a second engagement feature. The first engagement feature and the second engagement feature each comprises a bracing section and a cavity section that are adjacently connected to each other. The cavity section of the first engagement feature is adjacently connected to the cavity section of the second engagement feature. The bracing section of the first engagement feature and the bracing section of the second engagement feature are oppositely positioned of each other about the cavity sections of the first and second engagement features.

Description

Non-Slip Fastener Removal Tool

The present invention relates to a tool designed to tighten or loosen fasteners, such as screws and nuts. In particular, the present invention is a non-slip fastener removal tool designed to incorporate screws, nuts, and other similar fasteners without slippage.

Hex bolts, nuts, screws, and other similar threaded fasteners hold parts together by engaging complementary threads (often called female threads). The structure of this type of fastener generally includes: a cylindrical shaft portion with external threads, and a head at the tail end of the shaft portion. This external thread is combined with a complementary female thread, which is usually formed by tapping into a hole or nut, to secure the fastener and at the same time secure the associated parts. The fastener is turned or driven into the female thread by receiving an external torque on its head. The head is shaped to allow an external tool, such as a wrench, to apply torque to the fastener to rotate the fastener to some extent engaging the complementary female thread. Such fasteners are simple, cheap, and very effective, so they are commonly used in modern society. One of the common problems with these types of fasteners is that the tool often slips on the head, whether the fastener is male or female. Possible causes are: worn tools or fasteners, corroded tools or fasteners, overtightened fasteners, damaged fastener heads. There are various known methods for removing fasteners, some of which are more invasive. Once the head of the fastener is damaged, a more invasive method must be used to remove the clip Locked fasteners. In this case, using an electric drill to dig out the fastener is a method that some users often use to remove the fastener. While this method does work in some cases, it carries a high risk of damaging the internal threads of the screw hole.

The present invention provides an anti-slip fastener removal tool, which can definitely eliminate the possibility of slippage between the fastener and the removal tool. The present invention uses a series of bonded segments to engage the head of the fastener and effectively transfer torque between the fastener removal tool and the head of the fastener. Thus, the present invention can be used to tighten or loosen fasteners without fear of wearing the corners of the fastener head.

In one embodiment, the present invention includes: a torque tool body, and a plurality of pairs of coupling features. The torque tool body consists of a rotating shaft extending outwards to a plurality of paired coupling features. Pairs of coupling features are distributed on the outer surface of the torque tool body around the axis of rotation. Multiple mated engagement features prevent slippage when removing broken/worn fasteners.

In one embodiment, the present invention further comprises: an attachment body, and a combination hole, which allows an external torque application tool to be attached to the torque tool body. The center of the attachment body is located at the rotation axis, and the attachment body is rotated along axis distribution. Moreover, the attachment body is connected to the torque tool body. The coupling hole penetrates into the attachment body along the rotation axis. The combination hole shape can accept a male attachment element of a socket wrench.

Each of the plurality of pairs of combined features further includes: a first combined feature, a second combined feature, and a bisector. The bisector evenly cuts each of the plurality of pairs of binding features into a first binding feature and a second binding feature. The cross-section of each of the first bonding feature and the second bonding feature further includes: a support region, and a recessed region. Furthermore, the support area and recessed areas are adjacent to and connected to each other to define a single engaging feature; when removing a damaged/worn fastener, the engaging feature bites into the head of the fastener. The recessed region of the first bonding feature is connected to the recessed region of the second bonding feature. The support area of the first bonding feature and the support area of the second bonding feature are opposed to each other across the recessed area of the first bonding feature and the recessed area of the second bonding feature.

1‧‧‧torque tool body

2‧‧‧rotation axis

3‧‧‧Pairwise combination features

4‧‧‧support area

5‧‧‧Pocket area

6‧‧‧Equal line

7‧‧‧First combination feature

8‧‧‧Second combination feature

10‧‧‧attached body

11‧‧‧combination hole

14‧‧‧first angle

15‧‧‧Second Angle

16‧‧‧The third angle

17‧‧‧The first bisection angle

18‧‧‧Second Bisection Angle

Fig. 1 is a perspective view of the present invention, wherein the body of the torque tool extends outwardly from the rotating shaft to a plurality of paired coupling features.

Fig. 2 is a side view of the present invention, wherein the torque tool body is extended outwardly from the rotating shaft to a plurality of paired coupling features.

Figure 3 is a bottom view of the present invention, wherein the torque tool body is extended outwardly from the rotating shaft to a plurality of paired coupling features.

Fig. 4 is a top view of the present invention, wherein the torque tool body extends outwardly from the rotating shaft to a plurality of paired coupling features.

Fig. 5 is a top view of the present invention, which shows that the torque tool body is extended outward from the rotating shaft to a plurality of paired coupling features, and shows a bisector, a first bisector angle, and a second bisector Bisect the angle.

First of all, it should be specifically stated that the illustrations used in this specification are only used to illustrate some embodiments of the present invention, and the scope of the present invention is not limited by these illustrations.

The present invention is a non-slip fastener removal tool for tightening or loosening broken/worn fasteners, such as broken/worn screws or nuts. In a traditional wrench, most of the torque is transferred to the broken/worn fastener through the side corners of the fastener head. Wear degradation of the side corners over time reduces the efficiency of torque transfer from the wrench to the fastener head and can lead to slippage. The present invention overcomes the above-mentioned problems by shifting the point of contact to the sidewall of the fastener head. The present invention achieves the above object through a plurality of interlocking teeth. Each engaging tooth is arranged to engage or bite the side wall of the fastener head, rather than the side corners of the fastener head. This ensures that there is just the right amount of torque delivered to the fastener head to initiate rotation of the fastener to remove or tighten a broken/worn fastener. However, the present invention is also designed to be used with unbroken or brand new fasteners; the present invention will not damage the fastener if the applied stress is not greater than the maximum torsional force allowed by the fastener's size.

The present invention utilizes a plurality of engaging teeth to engage the head side of the fastener (including damaged or otherwise condition fasteners) to efficiently transmit torque to the damaged/worn fastener. The present invention can be combined with or used for various general tools to increase the torque transmitted to the fastener. Typical tools include, but are not limited to: open-end wrenches, adjustable wrenches, pipe wrench, socket wrench, plumber's wrench, and other similar fastener engagement tools. The present invention is compatible with fasteners using female heads. A fastener using a female head, which is generally called a female fastener, combines the inner surface or inner hole of the fastener head with a tool for locking or loosening. The present invention is also compatible with right-hand threaded fasteners and left-handed threaded fasteners. The present invention can also be changed or programmed to match fasteners of different types and sizes.

Please refer to Figure 1 to Figure 5. The present invention includes: a torsion tool body 1 and a plurality of paired combination features 3 . The torque tool body 1 is a physical structure that exerts relative force on the head of the fastener through a plurality of paired coupling features 3 . For some fasteners, the torque tool body 1 functions like a screwdriver bit and is sized to engage in an interlocking manner with the opening of the fastener. Torque worker The length, width, and diameter of the tool body 1 can be designed to match male/female fasteners of various sizes. A plurality of paired coupling features 3 can prevent slippage when taking out a damaged/worn fastener, and they are distributed around a rotation axis 2 of the torque tool body 1, as shown in FIGS. 1 to 4 . By preventing slippage between the torque tool body 1 and the fastener head, the paired coupling features 3 can transmit torque to the male/female fasteners.

Pairs of coupling features 3 are distributed inside the torque tool body 1 to form a pentagon, and preferably symmetrical around the rotation axis 2 , wherein the rotation axis 2 passes through the center of the torque tool body 1 . A symmetrical design is also used in the present invention which works both with clockwise and counterclockwise rotation.

As shown in FIG. 1 , the torque tool body 1 is extended outwards from a rotating shaft 2 to a plurality of paired coupling features 3 . A plurality of paired coupling features 3 are distributed on the outer surface of the torque tool body 1 around the rotation axis 2, and form a structure of a screwdriver head of the present invention. The structure of the screwdriver head of the torque tool body 1 is associated with the shape of the opening of the fastener head, so a plurality of paired coupling features 3 can be combined with the fastener head from the inside of the fastener head.

The invention also includes an attachment feature. The attachment feature allows an external torque tool to be attached to the torque tool body 1, thereby increasing the torque applied to the head of the fastener. Please refer to Figure 2 and Figure 3. The present invention further includes: an attachment body 10 and a coupling hole 11, which allow an external torque application tool to be attached to the torque tool body 1, such as: open-end wrench, closed-end wrench, combination wrench, adjustable wrench or socket wrench . The center of the attachment body 10 is located on the rotation axis 2 , and the attachment bodies 10 are distributed along the rotation axis 2 so that the rotation axis of the torque applying tool is aligned with the rotation axis 2 . Moreover, the attachment body 10 is connected to the torque tool body 1 . In a preferred embodiment of the present invention, the attachment body 10 is a hexagonal structure; the diameter of the attachment body 10 is slightly larger than the diameter of the torque tool body 1 . However, depending on the manufacturing method and design, the attachment body 10 The diameter may be smaller than the diameter of the torque tool body 1 . The coupling hole 11 penetrates the attachment body 10 along the rotation axis 2 . The coupling hole 11 is shaped to accept the male attachment element of a socket wrench. Since most socket wrenches use a square male attachment element, the shape of the coupling hole 11 is preferably square. In other embodiments of the present invention, the design and shape of the attachment body 10 and the coupling hole 11 can be changed to adapt to different torque applying tools and different attachment means. For example, the shape of the coupling hole 11 may be, but not limited to, a square or a cylinder. In other embodiments of the present invention, the outer surface of the attachment body 10 may be subjected to surface gripping treatment, such as knurling or other treatment, so as to increase the friction force between the torque tool body 1 and the user's hand.

A bottom surface of the attachment body 10 is gradually sloped from the coupling hole 11 so that pairs of coupling features 3 can be hammered into a broken/worn fastener without damaging the coupling hole 11 . In other words, the diameter of the attachment body 10 near the coupling hole 11 is slightly larger than the diameter of the attachment body 10 near the torque tool body 1 so that the bottom surface is gradually inclined from the coupling hole 11 . In some embodiments of the present invention, the attachment body 10 does not have the coupling hole 11; in these embodiments, the attachment body 10 itself serves as a coupling feature between the external torque application tool and the present invention.

In one embodiment of the present invention, a wrench handle is connected to the periphery of the torque tool body 1, wherein the wrench handle is used as an external torque applying tool. Regarding the wrench handle, each of the plurality of pairs of coupling features 3 extends a certain length along the torque tool body 1 and defines a space within the torque tool body 1 . The above-mentioned space serves as a receiving hole for the head of the fastener, so that a plurality of paired coupling features 3 can clamp the side of the head of the fastener. The present invention further includes a fastener receiving hole passing through the torque tool body 1 . The fastener receiving hole is perpendicular to the rotation axis 2 and opposite to the handle of the wrench across the torque tool body 1 , thus providing a side opening for coupling a plurality of coupling features 3 in pairs.

In one embodiment of the present invention, the attachment body 10 may also include a quick connect feature. This quick-connect feature is commonly used on drills, impact drivers, and screw-on components.

A plurality of pairs of coupling features 3 are equidistantly distributed on the torque tool body 1 to form a closed shape as shown in FIG. 4 . In order to describe the details of this closed shape, each of the plurality of pairs of bonding features 3 further includes: a first bonding feature 7 , a second bonding feature 8 and a bisector 6 . According to the direction of rotation of the tool, first bonding features 7 and second bonding features 8 alternate in this closed shape. The bisector 6 evenly cuts each of the plurality of pairs of bonding features 3 into a first bonding feature 7 and a second bonding feature 8 .

Furthermore, the cross-section of each of the first bonding feature 7 and the second bonding feature 8 further includes: a supporting area 4 and a cavity area 5 , as shown in FIG. 4 . Furthermore, the support area 4 and the pocket area 5 are adjacent to each other and connected to each other to define a single engagement feature; when removing a damaged/worn fastener, the engagement feature bites into the head of the fastener. A top surface of the torque tool body 1 and a bottom surface of the attachment body 10 face each other through a plurality of paired coupling features 3 , wherein both the top surface and the bottom surface are designed as a plane.

The lengths and associated angles of the support regions 4 and pocket regions 5 can be varied to produce bonding features with sharper tooth-like configurations. The first bonding feature 7 is any one of the plurality of pairs of bonding features 3 , and the second bonding feature 8 is one of the plurality of pairs of bonding features 3 directly adjacent to the first bonding feature 7 . More specifically, the recessed area 5 of the first bonding feature 7 is connected to the recessed area 5 of the second bonding feature 8 . The pocket area 5 of the first bonding feature 7 and the pocket area 5 of the second bonding feature 8 both face the axis of rotation 2 and together define a circular shape. The support area 4 of the first bonding feature 7 and the support area 4 of the second bonding feature 8 are separated from each other by the recessed area 5 of the first bonding feature 7 and the recessed area 5 of the second bonding feature 8. right. In other words, the recessed area 5 of the first bonding feature 7 and the recessed area 5 of the second bonding feature 8 are in the middle of the support area 4 of the first bonding feature 7 and the support area 4 of the second bonding feature 8 .

A first length ratio between the support region 4 of the first bonding feature 7 and the pocket region 5 of the first bonding feature 7 is between 1:1.5 and 1:3.5. A second length ratio between the support region 4 of the second bonding feature 8 and the recess region 5 of the second bonding feature 8 is between 1:1.5 and 1:3.5. In some embodiments of the present invention, the first length ratio and the second length ratio are 1:2. In some embodiments of the present invention, the first length ratio and the second length ratio are 1:3.

The present invention further includes: a first connection point and a second connection point. More specifically, the first connection point is defined as: the intersection point of the recessed area 5 and the support area 4 of the first bonding feature 7; the second connection point is defined as: the recessed area of the second bonding feature 8 5 and the intersection point of support zone 4.

Furthermore, a first bisector angle 17 of the present invention is defined by the first connection point and the bisector line 6 , as shown in FIG. 5 . In different embodiments of the present invention, the first bisecting angle may be an acute angle, a right angle, or an obtuse angle.

Furthermore, a second bisector angle 18 of the present invention is defined by the second connection point and the bisector line 6 , as shown in FIG. 5 . In different embodiments of the present invention, the second bisecting angle may be an acute angle, a right angle, or an obtuse angle.

Furthermore, when an imaginary straight line is drawn between the first connection point and the second connection point, the first bisection angle 17 and the second bisection angle 18 jointly form an angle of 180 degrees.

A first imaginary line is drawn parallel to the support area 4 of the first bonding feature 7 and intersects the first connection point; a second imaginary line is drawn parallel to the support area 4 of the second bonding feature 8 and Intersects with the second junction. Thus, the first bisection angle 17 and the second bisection angle 18 jointly form an angle smaller than 180 degrees.

Furthermore, the support area 4 of the first bonding feature 7 and the support area 4 of the second bonding feature 8 are separated from each other. Moreover, the present invention further includes: a first geometric plane and a second geometric plane. The first geometric plane is parallel to the support area 4 of the first bonding feature 7 ; the second geometric plane is parallel to the support area 4 of the second bonding feature 8 . That is to say, in the present invention, the first geometric plane and the second geometric plane are not coplanar.

In a preferred embodiment of the present invention, the number of pairs of engaging features 3 in contact with the head of the fastener is 6 pairs, which is equal to 12 individual engaging features. Please refer to Figure 4. A first angle 14 is located within the first bonding feature 7 and is an angle of 30 degrees; a second angle 15 is located within the second bonding feature 8 and is an angle of 30 degrees. Moreover, a third angle 16 is sandwiched between two adjacent pairs of the plural pairs of combining features 3 , and the range of the third angle 16 is between 121 degrees and 179 degrees. In the present invention, the included angles among the plurality of pairs of combining features 3 can be varied as required in different embodiments. In some embodiments of the invention, the third angle 16 is 130 degrees. In some embodiments of the invention, the third angle 16 is 135 degrees. In some embodiments of the invention, the third angle 16 is 145 degrees. In some embodiments of the invention, the third angle 16 is 150 degrees.

In some embodiments of the invention, pairs of bonding features 3 taper along the axis of rotation. That is to say, the outer diameter of the pairs of engaging features 3 near the top surface of the torque tool body 1 is smaller than the outer diameter near the attachment body 10 . Moreover, the concave area 5 of the first coupling feature 7 and the concave area 5 of the second coupling feature 8 gradually become narrower and shallower from the top of the torque tool body 1 to the attachment body 10 . Although in some embodiments, the recessed area 5 of the first bonding feature 7 and the recessed area 5 of the second bonding feature 8 jointly define a circular profile. However, the present invention is not limited thereto. In other embodiments, the cavity area 5 of the first bonding feature 7 and the cavity area 5 of the second bonding feature 8 may jointly define other geometric shapes. For example, the recessed area 5 of the first bonding feature 7 and the recessed area 5 of the second bonding feature 8 may define a triangular profile within the associated support area 4 .

In order to use the present invention to remove a damaged/worn fastener, the torque tool body 1 is placed on the damaged/worn fastener such that a significant proportion of the pairs of engaging features 3 are located between the head of the fastener Inside. The user then simply applies a counter-clockwise twist to rotate and remove the broken/worn fastener. When torque is applied to the torque tool body 1, the pairs of engaging features 3 bite into the side of the fastener head and turn the broken/worn fastener. The present invention is designed to engage partially or fully with damaged/worn fastener heads. The present invention overcomes the sliding of the fastener head by using a plurality of pairs of engaging features 3 .

The present invention can use the recessed area 5 of the first engaging feature 7 and the recessed area 5 of the second engaging feature 8 to actuate fasteners having a leaflet configuration, such as Torx screws or Torx screws. The present invention can also use the support area 4 of the first engagement feature 7 and the support area 4 of the second engagement feature 8 to actuate the fastener from the external support surface of the socket fastener.

The present invention has been described above with examples. However, it should be understood that: without departing from the spirit or application scope of the present invention, modifications or changes made to these embodiments are still included in the scope of the present invention.

1‧‧‧torque tool body

2‧‧‧rotation axis

3‧‧‧Pairwise combination features

10‧‧‧attached body

Claims (12)

A non-slip fastener removal tool comprising: a torque tool body; and a plurality of pairs of engaging features, wherein: each pair of the plurality of pairs of engaging features further comprises: a first engaging feature and a second engaging feature; a cross-section of each of the first engaging feature and the second engaging feature further comprising: a support region and a pocket region; the plurality of pairs of engaging features surrounding the torque tool An axis of rotation of the body is distributed; the support area and the recess area are interconnected to form a sharp tooth between the support area and the recess area; surface; the recessed region of the first bonding feature is connected to the recessed region of the second bonding feature; the recessed region of the first bonding feature and the recessed region of the second bonding feature are both recessed toward the axis of rotation; the support area of the first bonding feature and the support area of the second bonding feature are straight or flat; the support area of the first bonding feature and the support area of the second bonding feature are separated by The recessed region of the first bonding feature and the recessed region of the second bonding feature face each other; wherein a first geometric plane lies parallel to the support region of the first bonding feature and a second geometric plane lies parallel to the The support area of the second bonding feature, the first geometric plane and the second geometric plane are not coplanar such that the support area of the first bonding feature and the support area of the second bonding feature are not aligned with each other. The non-slip fastener removal tool described in item 1 of the scope of the patent application, wherein a first angle is located within the first combination feature, and is an angle of 30 degrees; a second angle is located within the second combination feature , and is an angle of 30 degrees. The non-slip fastener removal tool as described in item 1 of the scope of the patent application, wherein the adjacent two pairs of the plurality of pairs of combining features sandwich a third angle, and the range of the third angle is Between 121 degrees and 179 degrees. The tool for removing anti-slip fasteners as described in item 3 of the scope of the patent application, wherein the third angle is 130 degrees. The tool for removing anti-slip fasteners as described in item 3 of the scope of the patent application, wherein the third angle is 135 degrees. The tool for removing anti-slip fasteners as described in item 3 of the scope of the patent application, wherein the third angle is 145 degrees. The tool for removing anti-slip fasteners as described in item 3 of the scope of the patent application, wherein the third angle is 150 degrees. The tool for removing anti-slip fasteners as described in item 1 of the scope of the patent application, wherein the torque tool body extends outward from the rotating shaft to the plurality of paired coupling features. The non-slip fastener removal tool as described in claim 1, wherein a first length ratio between the support area of the first coupling feature and the recess area of the first coupling feature is 1: Between 1.5 and 1:3.5. The non-slip fastener removal tool as described in claim 1, wherein a second length ratio between the support area of the second coupling feature and the recessed area of the second coupling feature is 1: Between 1.5 and 1:3.5. The non-slip fastener removing tool as described in claim 1, wherein the supporting area of the first coupling feature and the supporting area of the second coupling feature are separated from each other. The non-slip fastener removal tool as described in item 1 of the scope of the patent application, which further includes: an attachment body; and a combination hole, wherein the center of the attachment body is located at the rotation axis, and the attachment body is along The rotation axis is distributed; the attachment body is connected to the torque tool body; the combination hole penetrates the attachment body along the rotation axis and is opposite to the torque tool body.

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