RU2350793C1 - Screw with ledges and grooves between threads on rod - Google Patents

Abstract

FIELD: mechanics.

SUBSTANCE: screw comprises head and rod with spearhead. Helical threads are arranged on the rod outer periphery. The rod includes the first section comprising the said spearhead and the second section comprising head. Multiple cutting edges depart from the rod first section outer periphery and serve to cut object fibres and to remove remaining particles upward. The second section comprises multiple grooves arranged in the rod to receive the said remaining particles.

EFFECT: ease of screwing in object, protection of object against damage by remaining particles.

9 cl, 8 dwg

Description

1. Field of invention

The present invention relates to a screw having ribs in the first section, including the tip, and grooves in the second section, to effectively penetrate the object and remove residual particles of the object.

2. Description of the prior art

A conventional screw mainly includes a head and a shaft with spiral threads on the shaft. The tip is located at the end of the rod opposite the head so that the screw enters the object with the tip end, and the thread of the thread cuts the fibers of the object and allows the screw to move into the object. However, it is known from experience that if an object is a solid object, then users must exert great effort to advance and rotate the screw. This not only requires significant physical effort, but also increases the operating time. After the tip enters the object, the screw rotates and the threads of the thread cut the fibers of the object. Residual particles of the object cannot be removed within a small space and the object can be damaged by the accumulated remains of the object being cut. In US patent No. 6.789.991 and in US patent No. 6.056.491 disclosed two screws that are known to the applicant.

The present invention provides an improved screw that includes a first section containing a tip and a second section. The first section includes cutting edges between the threads of the thread on the shaft, which remove residual particles upward, and the second section contains grooves.

SUMMARY OF THE INVENTION

The present invention relates to a screw that comprises a head and a shaft connected to the head. The tip is made at the end of the rod and is located opposite the head. Spiral threads are located on the outer periphery of the rod. The rod comprises a first section and a second section, including a head. The first section contains a tip and a plurality of cutting edges extending from the outer periphery of the first section of the rod. The second section contains many grooves made in the shaft.

The present invention will become more apparent from the following description with reference to the accompanying drawings, which represent a preferred embodiment in accordance with the present invention for illustrative purposes only.

BRIEF DESCRIPTION OF THE DRAWINGS

1 shows a screw of the present invention;

figure 2 is a perspective view of the screw of the present invention;

figa is an enlarged view of the first section of the screw;

figure 2 In is an enlarged view of the second section of the screw;

Figure 3 illustrates two corresponding cross sections of a screw of a first section and a second section of a screw of the present invention;

Figure 4 shows how the first section of a screw penetrates an object;

Figure 5 shows how the second section of the screw penetrates the object, and

6 shows another embodiment of the screw of the present invention.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

As shown in figures 1, 2.2A, 2B and 3, the screw 1 of the present invention includes a head 11 and a rod 12 connected to the head 11. The tip 13 is located at the end of the rod 12 opposite the head 11. The spiral threads of thread 14 are located on the outer periphery of the rod 12. At least one cutting groove 131 is made on the outer periphery of the tip 13.

The rod 12 has a first section 121, including a tip 13, and a second section 122, which includes a head 11. The first section 121 includes many cutting edges 15 extending from the outer periphery of the first section 121 of the rod 12. The cutting ribs 15 are located between the spiral threads of the thread 14 and inclined relative to the axis of the rod 12. Each cutting edge 15 is an inverted wedge-shaped rib that has a cutting edge. The second section 122 contains many grooves 16 located in the rod 12, and grooves 16 located between the spiral threads of the thread 14. Each groove 16 is a wedge-shaped groove and is inclined relative to the axis of the rod 12.

As shown in FIGS. 4 and 5, when the screw 1 is screwed into the object 3, for example into a wooden object, the tip 13 and the rod easily enter the object 3 and remove the residual particles of the object. The screw of the present invention effectively enters objects.

Spiral threads of thread 14 cut the fibers of object 3, and at least one cutting groove 131 interacts with the object, helping the first section 121 of the shaft 12 to penetrate into the object 3. Cutting edges 15 cut the fibers of the object 3 and remove residual particles from the object 3. The second section 122 then enters object 3, grooves 16 are filled with residual particles of object 3 so that object 3 is not damaged by the processing residues of the material of the object. Due to the special design of screw 1, screw 1 can be easily inserted into the object and residual particles are effectively removed when the screw is screwed in.

6 shows another embodiment of screw 1, in which the spiral threads of the thread 14 of the first section 121 include a plurality of cutting faces 141 that protrude radially from the spiral threads of the thread 14, in order to more effectively cut the fibers of the object 3.

Although one embodiment of the present invention has been described and shown in the drawings, those skilled in the art will appreciate that further variations can be made without departing from the scope of the present invention.

Claims (9)

1. The screw containing
a head and a rod connected to the head, a tip located at the end of the rod and located opposite the head, spiral threads located on the outer periphery of the rod, the rod having a first section and a second section including the head; the first section, including the tip, has many cutting edges extending from the outer periphery of the first section of the rod, while the second section contains many grooves made in the rod. 2. The screw according to claim 1, in which each cutting edge is an inverted wedge-shaped rib. 3. The screw according to claim 1, in which the cutting edges are inclined relative to the axis of the rod. 4. The screw according to claim 1, in which the cutting edges are located between the spiral threads of the thread. 5. The screw according to claim 1, in which each groove is a wedge-shaped recess. 6. The screw according to claim 1, in which the grooves are inclined relative to the axis of the rod. 7. The screw according to claim 1, in which the grooves are located between the spiral threads of the thread. 8. The screw according to claim 1, in which at least one groove between the cutting edges is made on the outer periphery of the tip end. 9. The screw of claim 1, wherein the spiral threads of the first section include a plurality of cutting protrusions.

Images