阅读说明：本技术 具有连续缓和部区域的紧固件 (Fastener with continuous relief region ) 是由 J.霍克 于 2019-09-16 设计创作，主要内容包括：一种紧固件(100),包括具有第一端(115)和第二端(125)的杆部(110)。该紧固件(100)还包括设置在杆部(110)上的螺纹(130),该螺纹包括具有第一螺纹角(A1)的第一区域(116)和具有第二螺纹角(A2)的第二区域,该螺纹的至少一部分具有所述第一螺纹角。所述紧固件还包括在杆部中位于各圈螺纹之间的弧形缓和部区域(300)。(A fastener (100) includes a shank (110) having a first end (115) and a second end (125). The fastener (100) also includes a thread (130) disposed on the shank (110), the thread including a first region (116) having a first thread angle (a1) and a second region having a second thread angle (a2), at least a portion of the thread having the first thread angle. The fastener also includes an arcuate relieved region (300) in the shank between the turns of the thread.)

1. A fastener, comprising:

a stem having a first end and a second end of a defined length; and

a thread disposed on the shank, the thread including a first region having a first thread angle and a second region having a second thread angle, at least a portion of the thread having the first thread angle;

an arcuate relief region in the shank between the turns of the thread.

2. The fastener of claim 1 wherein the reliefs are separated from each turn of the thread by a circular cross-section of the shank.

3. The fastener of claim 1, wherein the circular cross-section of the first side of the relieved portion and the second side of the relieved portion is separated from each turn of the thread by a flat separation region.

4. A fastener as claimed in claim 3, wherein the length of the relief is at least twice the length of the separation region.

5. The fastener of claim 1 wherein the shank has a minor diameter and the lowest point of the arcuate relief has a smaller diameter than the minor diameter of the shank.

6. The fastener of claim 5 wherein the minor diameter is 1.125 times greater than the minor diameter and the arcuate relief region is defined by a radius of about 0.09 inches.

7. A fastener as claimed in claim 6, wherein the transition between the relieved portion and the circular cross-section of the shank comprises a rounded edge.

8. The fastener of claim 1 wherein the first region of the thread has a symmetrical cross-section and the second region has an asymmetrical cross-section.

9. A fastener, comprising:

a shaft having a front end at a first end and a head at a second end, and a surface having a small diameter;

a continuous helical thread having a thread diameter greater than the minor diameter and located on the shank between the first and second ends; and

a continuous helical arcuate relief region between each turn of the helical thread, the relief having a smaller diameter than the smaller diameter of the shank.

10. A fastener as claimed in claim 9 wherein the reliefs are separated from each turn of the thread by a flat separation region of the shank surface.

11. The fastener of claim 10 wherein the length of the relief is at least twice the length of the separation region.

12. The fastener of claim 11 wherein the lowest point of the arcuate relief has a smaller diameter.

13. The fastener of claim 12 wherein the minor diameter is 1.125 times greater than the minor diameter and wherein the arcuate relief region is defined by a radius of about 0.09 inches.

14. A fastener as claimed in claim 13, wherein the transition between the reliefs and the circular cross-section of the shank comprises a rounded edge.

15. The fastener of claim 11, wherein the thread has a symmetrical thread angle in a first region adjacent the first end and an asymmetrical thread angle in a second region, the thread of the first region having a first thread angle greater than a second thread angle of the second region, at least a portion of the continuous helical thread comprising a serrated edge.

Background

Fastener designs have been used to improve the specific characteristics of fasteners of different materials. Finally, fasteners need to be safe and efficient to bond one material to another. Screw-type fasteners typically include a threaded shaft having a tip at one end and a head at the other end. The head is adapted to be driven by a tool to rotate the fastener. Some heads are designed to be recessed into the material being fastened, while others are designed to grip the material so that the heads protrude above the surface of the material being bonded.

Particles are generated when a fastener enters certain materials to be fastened. The particles can impede the advancement of the fastener through the material.

Disclosure of Invention

The technology described herein provides a unique fastener. The fastener includes a shank having a first end and a second end of a defined length. The fastener also includes a thread disposed on the shank, the thread including a first region having a first thread angle and a second region having a second thread angle, at least a portion of the thread having the first thread angle. The fastener also includes an arcuate relieved region in the shank between the turns of the thread.

Implementations may include one or more of the following features. In the fastener, the reliefs are separated from the turns of the thread by the circular cross-section of the shank. In the fastener, the circular cross-sections of the first side of the relieved portion and the second side of the relieved portion of the relief portion are separated from the turns of the thread by a flat separation region. In the fastener, the length of the moderation portion is at least twice the length of the partitioning region. In the fastener, the shank has a small diameter, and the lowest point of the arcuate relief has a smaller diameter than the small diameter of the shank. In the fastener, the minor diameter is 1.125 times larger than the minor diameter. In the fastener, the transition between the reliefs and the circular cross-section of the shank comprises a rounded edge. In the fastener, the arcuate relief region is defined by a radius of about 0.09 inches. In the fastener, a first region of the thread has a symmetrical cross-section and a second region has an asymmetrical cross-section.

One general aspect includes a fastener comprising: a shaft having a front end at a first end and a head at a second end, and a surface having a small diameter. The fastener also includes a continuous helical thread having a thread diameter greater than the minor diameter and located on the shank between the first and second ends. The fastener also includes a continuous helical arcuate relief region between each turn of the helical thread, the relief having a smaller diameter than the smaller diameter of the shank.

Implementations may include one or more of the following features. In the fastener, the relief is separated from each turn of the thread by a flat separation region of the shank surface. In the fastener, the length of the moderation portion is at least twice the length of the partitioning region. In the fastener, the lowest point of the arcuate relief has a smaller diameter. In the fastener, the minor diameter is 1.125 times larger than the minor diameter. In the fastener, the arcuate relief region is defined by a radius of about 0.09 inches. In the fastener, the transition between the reliefs and the circular cross-section of the shank comprises a rounded edge. In the fastener, the thread has a symmetrical thread angle in a first region adjacent the first end and an asymmetrical thread angle in a second region, the thread of the first region having a first thread angle greater than a second thread angle of the second region, at least a portion of the continuous helical thread including a serrated edge.

This section is intended to briefly introduce a selection of concepts that are further described below in the detailed description section. This section is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

Drawings

FIG. 1 shows a plan view of a first embodiment of a fastener of the present technology, including a partial cross-sectional view at detail B, which is shown enlarged in FIG. 5;

FIG. 2 shows an end view of the fastener;

FIG. 3 is a partial sectional view taken along line C-C in FIG. 2;

FIG. 4 is a cross-sectional view taken along line A-A in FIG. 1;

fig. 5 is an enlarged partial sectional view of a detail region B in fig. 1.

Detailed Description

The technology described herein is a fastener having features that allow for the securing of elements in wood, composite materials, or other materials and provide improved performance.

The present technique includes a threaded fastener 100 having a varying thread angle and having a dust (or debris) channel (or relief) 300 in the shank 110 to remove particles generated when the fastener is inserted into a material. The first portion of the threads is formed with a first thread angle a1 and the second portion of the threads is formed with a second thread angle a 2. In one embodiment, the first thread angle is greater than the second thread angle and is formed in the threads of the leading or first end of the fastener. A dust channel or relief 150 is formed between each turn of the thread.

The present technique will be described with reference to fig. 1-5.

In one embodiment, the fastener 100 includes a shank 110, the shank 110 having a tip 115 at a forward or first end and a head 125 at a head or second end. Shank 110 includes a threaded region 120 and an unthreaded region 122. Continuous helical thread 130 is formed from tip 115 toward the second end, has a first asymmetric thread angle a1 in first threaded region 116 beginning at the first end and extending toward the second end, and has a second asymmetric thread angle a2 in second threaded region 118 adjacent to the first thread angle and extending from the first end toward the second end. The first thread angle a1 is greater than the second thread angle a2, and the thread (130b) having an asymmetric thread angle includes a serrated edge. In one embodiment, A1 is approximately 60 degrees, A2 is approximately 40 degrees, A3 is approximately 30 degrees, and A4 is approximately 10 degrees (all within a range of + -3-5 degrees).

The stem may be formed of galvanized steel, although other materials may be used. The first threaded portion 116 extends from the tip 115 to the second portion 120. The second threaded portion 118 extends from the first threaded portion 116 to the unthreaded portion 122. The shank in region 122 is cylindrical with a circular cross-section and in this embodiment includes an unthreaded region.

The body of the shank has a minor diameter D2 (fig. 3) in the threaded region 120. The diameter of the second portion 122 may be greater than or equal to D2.

The first threaded portion 116 of the shank includes a first portion 130a of the helical thread 130 formed on the shank 130 extending from the tip 104. The diameter D1 of thread 130 is approximately 1.4-1.75 times that of D2. The effective thread height (H) of thread 130 above the shank in portion 120 is equal to ((D1-D2)/2) and has a pitch P that is approximately 17-18 times the effective thread height.

In one embodiment, the threads 130 have an overall length L2 and a second length L3 of asymmetric threads. Thus, the length of region 116 is L2-L3, and L2 is approximately three times the length of region 116. The thread 130b includes a serrated edge defined by a plurality of teeth 150 as shown in fig. 2. Other sawtooth configurations may also be used.

In another unique aspect of the present technique, the stem includes a dust mitigation section 300 formed between each turn of the thread 130. The reliefs 300 are continuous helical structures formed in the shank and interleaved between and mating with the turns of the thread 130. As shown in fig. 1 and 3, reliefs 300 are disposed in thread portion 120 between turns of the thread and between symmetrical thread corner portions of thread 130a and asymmetrical thread corner portions of thread 130b along a portion or the entire length of the shank. The relieved portion is formed with a concave arcuate shape relative to the stem portion, the arcuate shape defined by a radius R, which in one embodiment is 0.090 inches (+ -0.10 inches). As can be seen in the cross-sectional view of FIG. 3, the reliefs 300 have a length L5 and are separated from each turn of the thread 130 by a separation region 312, 314 having a length L4 of the shank surface. The separation regions 312, 314 are located at the minor diameter D2 and include the flat surface portion of the shank between the turns of the thread (as shown in fig. 1, 3 and 5). In one embodiment, L5 is approximately twice that of L4. The separation regions 312, 314 form a smooth transition 310 (e.g., by rounded edges) between these regions and the relief 300.

The depth of the relief is defined by the difference between the minor diameter D2 and the smaller diameter D3. In one embodiment, the ratio of D2 to D3 is 1.125.

In various embodiments, the overall length L1 of the fastener may vary between 2.75-4 inches, and the length L2 may be 1.75 inches. In such an embodiment, the minor diameter D2 may be 0.135 inches and the minor diameter may be 0.120 inches, such that the depth of each moderator is 0.00075 inches.

The head 125 may be any standard head suitable for receiving a tool capable of providing torque to a fastener, but in the embodiment of fig. 1-5, a hex nut head is used.

In addition to debris generated when installing the fasteners, the dust channel of the mitigation section also accommodates debris generated when drilling holes in concrete or masonry. Through experimentation, it has been determined that the smooth arcuate shape of the relieved portion area significantly improves particulate retention when the fastener is inserted into materials such as concrete and masonry. This improvement is also seen in the fastening of wood and composite materials. The arcuate nature of the relief allows the particles to settle therein as the fastener is inserted into the material to be fastened so as not to impede advancement of the fastener. In one embodiment, the dust channel reduces the installation effort by about 15% compared to a similar screw without the dust channel.

Embodiments of the present technique include a fastener including a shank having a first end and a second end of a defined length; a thread disposed on the shank, the thread including a first region having a first thread angle and a second region having a second thread angle, at least a portion of the thread having the first thread angle; and an arcuate relief region in the shank between the turns of the thread.

The fastener may comprise the fastener described previously wherein the reliefs are separated from each turn of the thread by the circular cross-section of the shank.

The fastener may comprise any of the above-described fasteners wherein the circular cross-section of the first side of the moderator portion and the second side of the moderator portion is separated from each turn of the thread by a flat separation region.

The fastener may comprise any of the above-described fasteners, wherein the length of the relief is at least twice the length of the separation region.

The fastener may comprise any of the above fasteners wherein the shank has a minor diameter and the lowest point of the arcuate relief has a smaller diameter than the minor diameter of the shank.

The fastener may comprise any of the above-described fasteners, wherein the minor diameter is 1.125 times larger than the minor diameter.

The fastener may comprise any of the fasteners described above, wherein the arcuate relief region is defined by a radius of about 0.09 inches.

The fastener may comprise any of the above fasteners wherein the transition between the reliefs and the circular cross-section of the shank comprises a rounded edge.

The fastener may comprise any of the above fasteners wherein the first region of the thread has a symmetrical cross-section and the second region has an asymmetrical cross-section.

Another embodiment includes a fastener comprising a shank having a leading end at a first end and a head at a second end, and a surface having a small diameter; a continuous helical thread having a thread diameter greater than the minor diameter and located on the shank between the first and second ends; and a continuous helical arcuate relief region between each turn of the helical thread, the relief having a smaller diameter than the smaller diameter of the shank.

The fastener may comprise any of the above fasteners wherein the reliefs are separated from each turn of the thread by a flat separation region of the shank surface.

The fastener may comprise any of the above-described fasteners, wherein the length of the relief is at least twice the length of the separation region.

The fastener may comprise any of the above fasteners wherein the lowest point of the arcuate relief has a smaller diameter.

The fastener may comprise any of the above-described fasteners, wherein the minor diameter is 1.125 times larger than the minor diameter.

The fastener may comprise any of the fasteners described above, wherein the arcuate relief region is defined by a radius of about 0.09 inches.

The fastener may comprise any of the above fasteners wherein the transition between the reliefs and the circular cross-section of the shank comprises a rounded edge.

The fastener may include any of the above-described fasteners, wherein the threads have a symmetrical thread angle in a first region adjacent the first end and an asymmetrical thread angle in a second region, the threads of the first region having a first thread angle greater than a second thread angle of the second region, at least a portion of the continuous helical thread including a serrated edge.

A fastening device may include a shank and a device 300 for removing particulates as the fastener enters a material to be fastened. The device 300 may include reliefs that interleave with the helical threads on the shank of the fastener.

Although the subject matter of the present invention has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the features and acts described above are disclosed as example forms of implementing the claims.