CN112638588A

CN112638588A - Fastener take-out device

Info

Publication number: CN112638588A
Application number: CN201980054388.4A
Authority: CN
Inventors: 保罗·酷酷卡; 托马斯·斯蒂芬·酷酷卡
Original assignee: Reinforcement Holdings Co ltd
Current assignee: Reinforcement Holdings Co ltd
Priority date: 2018-08-21
Filing date: 2019-07-25
Publication date: 2021-04-09
Anticipated expiration: 2039-07-25
Also published as: EP4129577A1; JP2021534982A; EP3814060A1; EP3814060A4; AU2023237134A1; CA3107709A1; PL3814060T3; AU2024201526A1; CN112638588B; AU2019323774A1; EP3814060B1; AU2023237134B2; WO2020039281A1; JP7198467B2; ES2935712T3

Abstract

A fastener removal device for removing a gripped fastener and thereafter assisting the removal device in disengaging the gripped fastener. The extraction device includes: a body, a drive head, a torque tool body, a tubular sleeve, an external thread, and an internal thread. The torque tool body further includes: a plurality of sidewalls, and at least one engagement feature. The engagement feature engages a particular one of the sidewalls and will bite into the retained fastener. The driving head is concentrically connected with one end of the rod body to receive an external torque tool. The torque tool body is concentrically connected to one end of the rod body and is opposite to the driving head. The tubular sleeve is slidably combined with the rod body through the internal thread and the external thread, so that the clamped fastener can be separated from the torque tool body.

Description

Fastener take-out device

Technical Field

The present invention relates to tools (e.g., screws and nuts) for removing or removing fasteners. More particularly, the present invention discloses a combination of slip resistant threaded extractors for removing damaged fasteners.

Background

Hex bolts, nuts, screws, and other similar threaded devices are used to fixedly couple a plurality of workpieces together by engaging complementary threads, such as male or female threads. The structure of these types of fasteners generally has: a cylindrical shaft, an external thread on the surface of the shaft, and a head at one end of the shaft. The external threads engage a complementary female thread that threads into the hole or nut to secure the fastener and thereby join the workpieces together. The head of the fastener is the means for receiving torque to rotate or drive the fastener into the female thread. The head of the fastener is specially shaped to allow an external tool, such as a wrench, to apply torque to the fastener to allow the fastener to engage the female thread to some extent. These fasteners are simple, inexpensive, and effective, and are therefore commonly used in modern industry.

One of the common problems with such fasteners is: whether the fasteners are male or female, the tool often slips on the head. The reason for this may be: tool or fastener wear, tool or fastener corrosion, overtorquing of the fastener, head damage of the fastener. There are various methods available for removing a fastener, some of which are more aggressive. Once the fastener head is damaged, a more aggressive method is used to remove the clamped fastener. Some users remove fasteners by drilling them out with a drill bit. While this method may be effective in some applications, it does risk damaging the threads inside the hole. Another problem with conventional bolt extractors is that: the material of the fastener or the fastener itself may be attached to the removal tool.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a perspective view of the present invention in an exploded state.

Fig. 3 is an enlarged view of the torque tool body of the present invention.

Fig. 4 is a top view of a lever, a driver head, and a torque tool body of the present invention.

Fig. 5 is a perspective view of another embodiment of the present invention showing a lever, a driver head, and a torque tool body.

Fig. 6 is a top view of a lever, a driver head, and a torque tool body in accordance with another embodiment of the present invention.

Fig. 7 is a perspective view of yet another embodiment of the present invention showing a stick, a driver head, and a torque tool body.

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

Detailed Description

First, it is to be specifically explained that: the drawings used in this specification are for the purpose of illustrating certain embodiments of the invention only and are not intended to limit the scope of the invention to those drawings.

The invention relates to a fastener taking-out tool and an accessory of the fastener taking-out tool. More particularly, the present invention discloses various screwdriver bits for removing fasteners, and includes male and female embodiments. Removing a damaged fastener from a fastener extraction tool is a difficult task. The present invention discloses a release sleeve in combination with a removal tool to solve the above problems. More particularly, the present invention is designed to assist the user in removing broken fasteners that may have been engaged with a removal tool.

Please refer to fig. 1 and fig. 2. The present invention comprises: a shank 1, a driver head 2, a torque tool body 3, an external thread 15, a tubular sleeve 16, an internal thread 17, and a nut 18. The shaft 1 and drive head 2 allow the present invention to be attached to an external torque tool and apply torque through the torque tool body 3 equivalent to a socket fastener, as is conventional. The external torque tool may be, but is not limited to: electric drills, torque wrenches, pneumatic drills, socket screwdrivers, and other torque tools. The driving head 2 is used as a combination component of an external torque tool. More specifically, the driving head 2 is a nut-shaped member and is concentrically connected to one end of the rod body 1. The drive head 2 is preferably of a hexagonal cross-section, but may be of other geometries. For example, in one embodiment of the invention, the drive head 2 has a square cross-section. In a further embodiment of the invention, the base of the drive head 2 is of a dome-like configuration. More specifically, the bottom of the driving head 2 is opposite to the rod body 1 through the driving head 2. This dome-like configuration may be provided as a striking surface to which an impact force may be applied to force the torque tool body 3 into the object to be removed. However, the present invention is not limited to the striking face having to be of a dome-like configuration.

The torque tool body 3 is a rod for engagement with a clamped socket fastener, such as: a socket screw, a broken stud or a drilled hole of a specific size on a threaded shank, whereby torque can be applied to remove the retained socket fastener. The torque tool body 3 is opposed to the driving head 2 via the rod 1. Please refer to fig. 3. The torque tool body 3 further includes: a plurality of sidewalls 4, at least one bonding feature 8, a first base 13, and a second base 14. Generally, the torque tool body 3 is a prismatic structure made of high-strength metal and concentrically connected to one end of the rod 1. Each of the plurality of side walls 4 engages and holds a socket fastener whereby an external torque tool can effectively apply torque to the socket fastener. The side walls 4 are radially distributed about an axis of rotation 12 and create a cross-section complementary to the socket fastener. The number of the plurality of side walls 4 varies with the variety of socket fasteners. In one embodiment of the invention, the number of the plurality of side walls 4 is 6, thereby forming a torque tool body 3 having a hexagonal cross section. In another embodiment of the present invention, the number of the plurality of side walls 4 is 4, thereby forming a torque tool body 3 having a square cross section.

The first base 13 and the second base 14 are opposite to each other with a plurality of side walls 4 therebetween, wherein the rod body 1 is connected to the second base 14 and opposite to the first base 13. Furthermore, the first base surface 13 and the second base surface 14 are perpendicular to each of the plurality of side walls 4, thereby completing the prismatic structure of the torque tool body 3. More preferably, the following components: the first base 13 has a first base surface, wherein the first base surface is a plane and perpendicular to each of the plurality of side walls 4. Between the first base surface 13 and each of the plurality of side walls 4, there is a side edge, preferably: each side edge is chamfered. Furthermore, the first base surface 13 can be made conical and have an apex, like a punch. When an impact force is applied to the drive head 2, the engagement features 8 will bite into the side walls of the object to be removed. The engagement features 8 increase the friction/bonding force between the plurality of side walls 4 and a socket fastener to prevent slippage relative to each other. Thus, the bonding feature 8 is bonded to a particular one of the plurality of sidewalls 4, wherein the particular sidewall can be any one of the plurality of sidewalls 4.

The tubular sleeve 16 is an elongated tubular construction having an inner diameter complementary to the outer diameter of the rod body 1. The tubular sleeve 16, the internal thread 17, the external thread 15 and the nut 18 together form a removal mechanism for removing residual material or a socket fastener from the torque tool body 3. More preferably: the diameter of the tubular sleeve 16 increases at a first end of the tubular sleeve 16, wherein the first end of the tubular sleeve 16 is adjacent to the torque tool body 3. This increases the bonding area between the tubular sleeve 16 and the external object attached to the torque tool body 3. Generally, the tubular sleeve 16 is moved along the shaft 1, thereby pushing a socket fastener on the torque tool body 3 until the socket fastener (i.e., an external object) is disengaged. More specifically, the external thread 15 extends along the shaft 1 between the torque tool body 3 and the driving head 2. Furthermore, the external thread 15 is connected to the side of the rod body 1. The internal thread 17 is complementary to the external thread 15, thereby forming an interlocking joint. The internal thread 17 extends along the tubular sleeve 16 within the tubular sleeve 16. Furthermore, the internal thread 17 penetrates laterally into the tubular sleeve 16. In operation, the rod body 1 is concentrically located within the tubular sleeve 16, while the internal thread 17 mechanically engages the external thread 15. Thus, when the rod 1 and the tubular sleeve 16 rotate relative to each other, the tubular sleeve 16 moves along the rod 1. When the torque tool body 3 has removed a clamped socket fastener, the user needs to remove the socket fastener from the torque tool body 3. To do this, the user simply rotates the tubular sleeve 16 about the shaft 1 to move the tubular sleeve 16 towards the torque tool body 3 until the tubular sleeve 16 pushes against and allows the socket fastener to fall off. The user may rotate the tubular sleeve 16 by hand. In other situations where a lever means is required, the user may utilize two external torque tools, such as two wrenches. One wrench is mechanically coupled to the rod 1 by means of the driving head 2 and the other wrench is mechanically coupled to the tubular sleeve 16 by means of the nut 18. To this end, a nut 18 is concentrically attached to one end of the tubular sleeve 16. The shank 1 is also concentrically located within the nut 18. The shape of the nut 18 is preferably hexagonal, but the invention does not exclude the use of other geometries. The size, length, and materials of the tubular sleeve 16 and nut 18 may vary depending on the actual needs and preferences of the user.

Please refer to fig. 3 and 4. In one embodiment of the invention, the engagement feature 8 is an engagement recess. Each of the plurality of side walls 4 includes: a first side edge 5, a second side edge 6, and a support surface 7. The support surface 7 is in fact against a socket fastener; more particularly, against a side wall of the head of the socket fastener. The first side edge 5 and the second side edge 6 face each other with a support surface 7 interposed therebetween. The first side edge 5 and the second side edge 6 of each of the plurality of side walls 4 constitute corners of the torque tool body when viewed from the top view or the bottom view. The engagement recess enters perpendicularly into the support surface 7 of a particular side wall and forms a gripping point or gripping tooth in the support surface 7. The clamping points are formed by the combination recesses and the support surface 7. In one embodiment of the invention, the engagement recess extends from the first base surface 13 to the second base surface 14 on the torque tool body 3, thus ensuring that additional gripping points extend along the length of the torque tool body 3 for maximum gripping force. In another embodiment of the invention, the bonding pockets taper from the first base 13 to the second base 14, as shown in fig. 3. In order to further ensure that the maximum clamping force can be obtained, it is preferable that: an overall cross section 9 of the coupling recess is parallel to the first 13 and second 14 base surfaces.

In one embodiment of the invention the overall cross-section 9 of the coupling pocket is a part-circular cross-section. Furthermore, the partial circular cross section is recessed from the first side edge 5 of the specific side wall toward the second side edge 6 of the specific side wall. The partial circular cross-section ensures that: there are no or few high stress points in the torque tool body 3, thereby increasing the overall life of the tool. In another embodiment of the invention the overall cross-section 9 of the coupling pocket is a triangular profile. The triangular cross section is recessed from the first side edge 5 of the specific side wall toward the second side edge 6 of the specific side wall. Other shapes of profiles may also be applied to the bonding pockets, which may be, but are not limited to: a semi-square cross-section, a semi-rectangular cross-section, or a semi-elliptical cross-section. More preferably: the inner corners of the triangular, square, rectangular cross-sections have a radius of curvature, thereby giving the tool greater strength.

Please refer to fig. 4. In one embodiment of the invention, the overall cross-section 9 of the bonding pocket comprises a curved region 10, and a straight region 11. The resulting gripping point has a particular shape that can form a sharp engagement tooth that can bite into an angle or angles of the socket fastener, allowing the material inside the socket fastener to enter the engagement cavity, thereby creating a gripping force that is far superior to conventional tools that are designed only to push the material apart. The invention is particularly effective for worn or broken sockets. The curved region 10 is a semi-circular curve adjacent the first side edge 5 of the particular side wall. The rectilinear area 11 is adjacent to the curvilinear area 10 and opposite to the first lateral edge 5 of a particular lateral wall. The straight line region 11 guides a portion of the socket fastener to abut against the formed coupling tooth. The straight line region 11 extends from the curved region 10 to the second side edge 6 of the particular side wall. More specifically, the rectilinear area 11 starts from the curvilinear area 10 and ends at the second lateral edge 6 of the particular lateral wall. By flipping the positions of the curved region 10 and the straight region 11, this embodiment can be implemented in a clockwise mode or a counterclockwise mode.

In another embodiment of the invention the bonding pocket is located in the centre of the support surface 7 of the particular side wall. More specifically, the engagement recess has a first distance from a first side edge 5 of the particular side wall and a second distance from a second side edge 6 of the particular side wall, wherein the first distance is equal to the second distance. In yet another embodiment of the present invention, the first distance may not be equal to the second distance. The engagement pocket is able to engage the inner side wall of the socket fastener at this location to transfer torque most efficiently and with minimal likelihood of slippage. Further, this embodiment may rotate the socket fastener in both clockwise and counterclockwise directions.

Please refer to fig. 5, fig. 6, and fig. 7. In one embodiment of the invention, the engagement feature 8 is an engagement projection. The engaging projections are material protruding from the torque tool body 3, thus creating an additional gripping element for a particular side wall. More specifically, the engaging protrusions are connected to the side surfaces of the supporting surface 7 of the specific side wall. Furthermore, the engagement protrusion extends from the first base surface 13 to the second base surface 14, which ensures that the additional clamping member extends along the length of the torque tool body 3 and allows the present invention to engage the socket fastener at a greater depth, whereby the present invention can apply torque to the socket fastener with maximum efficiency. More preferably: the engaging protrusion is located at the center of the first side edge 5 of the specific side wall and the second side edge 6 of the specific side wall, so that the present embodiment can be used as a tool which can operate in both clockwise and counterclockwise directions. To ensure that the clamping force remains uniform along the torque tool, an overall cross-section 19 of the engaging protrusion is parallel to the first 13 and second 14 base surfaces.

Please refer to fig. 6. In one embodiment of the invention, the overall cross-section 19 of the engaging projection is a part-circular cross-section. The partially circular cross section of the engaging projection projects outward from the first side edge 5 of the specific side wall toward the second side edge 6 of the specific side wall. As wear occurs, the tool receiving aperture of the socket fastener becomes larger. This implementation is therefore particularly useful for extremely worn socket fasteners. The engaging projections extend from the support surface 7 of the particular side wall to abut and engage the damaged surface of the socket fastener.

Please refer to fig. 4 and fig. 6. In one embodiment of the present invention, in a preferred embodiment of the present invention, the at least one binding feature 8 comprises a plurality of binding features 8. The plurality of coupling features 8 are radially distributed about the axis of rotation 12, each of the plurality of coupling features 8 being coupled to a corresponding one of the plurality of sidewalls 4, as shown in fig. 3. Such a design creates an additional gripping feature in each of the plurality of side walls 4 that ensures: a significant clamping force is created between the present invention and a socket fastener.

Please refer to fig. 7. In one embodiment of the invention, the torque tool body 3 tapers from the second base surface 14 to the first base surface 13. This design allows the invention to be used with socket fasteners of different sizes. The degree of tapering may vary depending on the needs and preferences of the user. In one embodiment of the present invention, the torque tool body 3 may be connected to various tools, which may be, but are not limited to: impact tools, hydraulic screws, wrench sockets, and screwdrivers.

Please refer to fig. 8. In one embodiment of the present invention, the present invention is a dual head design. In this embodiment, at least one rod body 1 comprises: a first rod 22 and a second rod 23; at least one torque tool body 3 comprises: a first torque tool body 24, and a second torque tool body 25; the at least one external thread 15 comprises: a first external thread 26 and a second external thread 27. This embodiment provides a dual headed version of the invention where neither may be of a different design and/or have different directionality to increase the utility of the invention. More specifically, this embodiment may be used for both clockwise and counterclockwise rotation. The first rod 22 and the second rod 23 face each other with the driving head 2 interposed therebetween. A first torsion tool body 24 is concentrically connected to one end of the first rod 22 and opposite the drive head 2. A first external thread 26 extends along the first rod 22 between the first torque tool body 24 and the drive head 2. Furthermore, the first external thread 26 is connected to the side of the first rod 22. The above description provides a one-sided architectural overview of the present embodiment. Forming mirror symmetry with the above configuration, the second torque tool body 25 is concentrically attached to one end of the second rod 23, and is opposite to the driving head 2. A second external thread 27 extends along the second rod 23 between the second torque tool body 25 and the driver head 2. Furthermore, the second external thread 27 is connected to the side of the second rod 23. In this embodiment, the type of the engagement feature of the first torque tool body may be different from the type of the engagement feature of the second torque tool body, thereby forming a two-in-one tool.

The invention has been described above by way of examples, but it should be understood that: these implementation routines are merely illustrative of the present invention and are not intended to limit the scope of the present invention. Any modification or variation which does not depart from the spirit of the invention will still be included within the scope of the invention.

Claims

1. A fastener-extraction device, comprising:

at least one rod body,

A drive head;

at least one torque tool body; and

at least one external thread, wherein

The torque tool body further includes: a plurality of sidewalls, and at least one bonding feature;

the plurality of side walls are radially distributed around a rotation axis of the torque tool body;

the combination feature is combined with a specific side wall in the plurality of side walls;

the driving head is concentrically connected with one end of the rod body;

the torque tool body is opposite to the driving head through the rod body;

the torque tool body is concentrically connected with one end of the rod body;

the external thread extends along the rod body between the torque tool body and the driving head;

the external thread is connected to the side surface of the rod body.

2. The fastener extraction device of claim 1, further comprising:

a tubular sleeve; and

an internal thread, wherein

The internal thread is within the tubular sleeve;

the internal thread extends along the tubular sleeve;

the internal thread penetrates into the tubular sleeve;

the rod body is concentrically positioned in the tubular sleeve;

the internal thread is mechanically coupled to the external thread.

3. The fastener extraction device of claim 2, further comprising:

a nut, wherein

The nut is concentrically connected to one end of the tubular sleeve;

the rod is located inside the nut.

4. The fastener-removal device of claim 1, wherein

The at least one binding feature comprises a plurality of binding features;

the plurality of engagement features are radially distributed about the axis of rotation of the torque tool body;

each of the plurality of bonding features is bonded to a corresponding one of the plurality of sidewalls.

5. The fastener-removal device of claim 1, wherein

The engagement feature is an engagement pocket;

the torque tool body further includes: a first base surface, and a second base surface;

each of the plurality of sidewalls includes: a first side edge, a second side edge, and a support surface;

the first side edge and the second side edge are opposite to each other with the supporting surface therebetween;

the rod body is connected to the second base surface and is opposite to the first base surface;

the combination recess vertically enters the supporting surface of the specific sidewall.

6. The fastener-removal device of claim 5, wherein an overall cross-section of the engagement recess is parallel to the first and second base surfaces.

7. The fastener-removal device of claim 5, wherein

An overall cross section of the bonding pocket comprises a curved area and a linear area;

the curved region is adjacent to the first side edge of the specific side wall;

the straight line area is adjacent to the curve area and opposite to the first side edge of the specific side wall;

the straight line region extends from the curved line region to the second side edge of the particular side wall.

8. The fastener-removal device of claim 1, wherein

The engagement feature is an engagement projection;

the first side edge of the specific side wall and the second side edge of the specific side wall are opposite to each other across the supporting surface;

the combination bulge is connected with the side surface of the supporting surface of the specific side wall;

the combination projection extends from the first base surface 1 to the second base surface;

the combination protrusion is located in the center of the first side edge of the specific side wall and the second side edge of the specific side wall.

9. The fastener-removal device according to claim 8, wherein an overall cross-section of the engaging projection is parallel to the first and second base surfaces.

10. The fastener-extraction device of claim 8, wherein

An overall cross section of the combining protrusion is a partial circular section;

the partial circular cross section is convex outward from the first side edge of the specific side wall to the second side edge of the specific side wall.

11. The fastener-removal device of claim 1, wherein

the torque tool body tapers from the second base surface to the first base surface.

12. The fastener-removal device of claim 5, wherein a skirt is located between the first base and each of the plurality of side walls and is chamfered.

13. The fastener-removal device of claim 1, wherein

The at least one stick body comprises: a first rod and a second rod;

the at least one torque tool body comprises: a first torque tool body, and a second torque tool body;

the at least one external thread comprises: a first external thread, and a second external thread;

the first rod body and the second rod body are opposite to each other through the driving head;

the first torsion tool body is concentrically connected with one end of the first rod body and is opposite to the driving head;

the first external thread extends along the first rod body between the first torque tool body and the driving head;

the first external thread is connected to the side surface of the first rod body;

the second torque tool body is concentrically connected with one end of the second rod body and is opposite to the driving head;

the second external thread extends along the second rod body between the second torque tool body and the driving head;

the second external thread is connected to the side surface of the second rod body.