US20140064878A1 - Screw - Google Patents
Screw Download PDFInfo
- Publication number
- US20140064878A1 US20140064878A1 US14/078,934 US201314078934A US2014064878A1 US 20140064878 A1 US20140064878 A1 US 20140064878A1 US 201314078934 A US201314078934 A US 201314078934A US 2014064878 A1 US2014064878 A1 US 2014064878A1
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- United States
- Prior art keywords
- screw
- cutting
- cutting edge
- positioning member
- units
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000005553 drilling Methods 0.000 claims abstract description 41
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 11
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
- F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
- F16B25/0052—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge having indentations, notches or the like in order to improve the cutting behaviour
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
- F16B25/0057—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
- F16B25/0068—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw with multiple-threads, e.g. a double thread screws
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip
Definitions
- the present invention relates to a fastener design, particularly to a screw capable of reducing the screwing resistance and increasing the drilling speed.
- a conventional screw 1 comprises a shank portion 11 , a head portion 12 disposed at one end of the shank portion 11 , a drilling portion 13 disposed at the other end of the shank portion 11 , and a plurality of threaded units 14 spirally disposed around the shank portion 11 .
- the drilling portion 13 is formed into a tapered end.
- the screw 1 might be smoothly fastened into the object 2 by using the drilling portion 13 to pierce the object 2 .
- the object 2 is forcedly pierced by the tapered drilling portion 13 .
- fibers of the object 2 are difficult to be severed efficiently. That is to say, the fibers are just simply pushed and thrust by the tapered drilling portion 13 , so the screw 1 would be easily impeded by debris resulted from the object 2 while drilling. As a result, the debris can not be timely expelled, and the heaped debris incurs an increasing resistance on the screw 1 . Therefore, the operation of fastening the screw 1 is influenced.
- the upright screw 1 in the object 2 might be subject to rustiness when the head portion 12 is waterlogged. Therefore, in the practical application, the screw 1 is inclinedly drilled into the object 2 .
- the screw 1 is inclinedly drilled into the object 2 .
- the head portion 12 is easily protruded from the surface of the object 2 after screwing. Such abnormal operation is unbeneficial for further fastening and processing. Therefore, the screw 1 needs improvements.
- the screw in accordance with the present invention comprises a shank portion, a head portion disposed at one end of the shank portion, a drilling portion disposed at the other end of the shank portion, and a main threaded section with a plurality of threaded units spirally disposed around the shank portion.
- Two inclined cutting planes are formed on the drilling portion and are connected at a cutting edge.
- the cutting edge extendedly defines two ends.
- a positioning member is defined on the cutting planes of the drilling portion for stabilizing the cutting edge to execute cutting.
- the main threaded section extends toward the cutting edge and connects to one end of the cutting edge for communicating the main threaded section with the drilling portion.
- a threaded section with a plurality of auxiliary threaded units is disposed around the shank portion, the auxiliary threaded units are disposed between the threaded units of the main threaded section, and a first diameter of the auxiliary threaded units is smaller than a second diameter of the threaded units.
- a plurality of indented units can be defined on the auxiliary threaded units, and a plurality of slots can be defined on part of the threaded units.
- the positioning member is integrally protruded outwards from the cutting planes to form a pointed unit.
- the pointed unit is formed by a plurality of inclined walls to structure a pyramid.
- the pointed unit is structured into a cone.
- the positioning member is formed by a plurality of inclined walls that are recessed from the cutting planes, thereby forming a valley on the cutting planes.
- Each inclined wall and the cutting edge are converged at one point.
- the positioning member helps the cutting edge stably stand on a screwing object, which allows the cutting edge to provide a scraping effect at the time of drilling.
- the cutting planes guide cutting debris to smoothly enter the channel between the threaded units so as to rapidly expel the cutting debris therefrom. Thereby, a large amount of cutting debris is not accumulative in the vacancy of the threaded units, so the screwing resistance could be decreased, and the screwing speed could be increased.
- the screw is favorably sunk in the object for facilitating the further operation.
- FIG. 1 is a schematic view showing a conventional screw
- FIG. 2 is a schematic view showing the conventional screw
- FIG. 3 is a schematic view showing a first preferred embodiment of the present invention.
- FIG. 4 is an end view of FIG. 3 ;
- FIG. 5 is a partial schematic view showing a second preferred embodiment of the present invention.
- FIG. 6 is a schematic view showing the first preferred embodiment of the present invention in screwing
- FIG. 7 is a schematic view showing a third preferred embodiment of the present invention.
- FIG. 8 is an end view of FIG. 7 ;
- FIG. 9 is a schematic view showing a fourth preferred embodiment of the present invention.
- FIG. 10 is a schematic view showing a fifth preferred embodiment the present invention.
- FIG. 11 is a schematic view showing a sixth preferred embodiment of the present invention.
- FIG. 12 is a schematic view showing a seventh preferred embodiment of the present invention.
- a screw 3 comprises a shank portion 31 , a head portion 32 disposed at one end of the shank portion 31 , a drilling portion 33 disposed at the other end of the shank portion 31 , and a main threaded section 34 with a plurality of threaded units spirally disposed around the shank portion 31 .
- a channel 341 is defined amid the threaded units 34 .
- two inclined cutting planes 331 are convergently formed on the drilling portion 33 , and a cutting edge 332 is formed on the convergence of the cutting planes 331 .
- the cutting edge 332 extendedly defines two ends 333 .
- a positioning member 334 is defined on the cutting planes 331 to provide the screw 3 a positioning effect on an object while drilling.
- the positioning member 334 is integrally protruded outwards from the cutting planes 331 to structure a pointed unit .
- the pointed unit of the positioning member 334 is preferably assembled by a plurality of inclined walls 334 ′ protruded from the cutting planes 331 , for example, there are four inclined walls 334 ′ forming a square pyramid as illustrated.
- the pointed unit of the positioning member 334 can be structured by a cone protruded from the cutting planes 331 .
- an oblate cone could be especially defined on the cutting planes 331 as preferably shown in FIG. 5 .
- the cutting edge 332 preferably scrapes the object while drilling.
- the channel 341 is formed as an intercommunicated channel amid the threaded units of the main threaded section 34 for being communicated with the drilling portion 33 .
- the e positioning member 334 is propped up against an object 4 (e.g. a plywood) for achieving a stable positioning effect.
- an object 4 e.g. a plywood
- the head portion 32 is imparted by a screwing torque for driving the drilling portion 33 to rotate.
- a gradual screwing effect is brought about, and the cutting edge 332 is applied to cut and sever the object 4 with a sharp progression.
- the cutting debris generated in the drilling step is conducted to enter from the cutting planes 331 of the drilling portion 33 into the channel 341 among the threaded units of the main threaded section 34 directly so that the cutting debris is promptly removed through the channel 341 to prevent a large amount of cutting debris from obstructing and compressing the vacancy between the screw 3 and the object 4 . Therefore, the present invention facilitates a reduced fastening resistance and allows the screw 3 to provide a stable fastening effect when the screw 3 is gradually drilled for being sunk into the object 4 .
- the screw 3 is positioned upright or slantwise, a firm and stable positioning effect of the screw 3 in the object 4 is ensured, and the screw 3 is sunk in the object 4 without exposing to the outside.
- the object 4 has a smooth appearance for benefiting a further processing.
- FIG. 7 and FIG. 8 a third preferred embodiment is shown.
- the screw 3 in these figures is shown by another sides.
- the screw 3 still comprises the shank portion 31 , the head portion 32 , the drilling portion 33 , and the main threaded section 34 with threaded units.
- the positioning member 334 is assembled by a plurality of inclined walls 334 ′ that are recessed on the cutting planes 331 , thereby forming a valley 335 thereon.
- a point P is defined on the convergence of each inclined wall 334 ′ and the cutting edge 332 to give the flat cutting edge 332 and the cutting planes 331 a support on the object (not shown) at the time of drilling and obtain an accurate and stable positioning effect,
- the screw 3 could be speedily drilled in the object by the efficient cutting and removal of debris which facilitates a decrease in the screwing resistance.
- the screw 3 is able to provide a speedy fastening effect and is firmly sunk into the object after drilling.
- the screw 3 still comprises a shank portion 31 , a head portion 32 , a drilling portion 33 , and a main threaded section 34 with a plurality of threaded units.
- the correlation of elements and functions are the same as those of previous preferred embodiments and herein are omitted.
- a threaded section A is further defined on the shank portion 31 .
- the threaded section A comprises a plurality of auxiliary threaded units 35 that are spirally disposed between. the threaded units 34 .
- a first diameter r 2 of the auxiliary threaded units 35 is smaller than a second diameter r 1 of the threaded units of the main threaded section 34 . Accordingly, the screw 3 attains a high-low threaded arrangement by setting the auxiliary threaded units 35 of the threaded section A between the threaded units of the main threaded section 34 .
- Such high-low threaded units are beneficial to accelerate the speed of debris removal, decrease the drilling resistance, and prevent the large amount of accumulation of debris.
- the screw 3 is smoothly and speedily fastened into the object and is firmly sunk. into the object after the fastening operation.
- a sixth and a seventh preferred embodiment of the present invention are shown.
- This embodiment is characterized in that a plurality of indented units 351 can be defined on the auxiliary threaded unit 35 .
- a plurality of slots 342 are formed on part of the threaded units of the main threaded section 34 . Accordingly, the slots 342 and the indented units 351 assist the drilling portion 33 of the screw 3 in increasing the drilling and cutting effect and promoting the removal of debris, thereby allowing the drilling friction and the resistance to be largely reduced and increasing the fastening efficiency.
- the screw 3 is sunk in the object 4 after the drilling step, and a firm and stationary fastening performance is achieved.
- the present invention takes advantage of the positioning member to help a stable positioning effect at the beginning of the drilling operation, thereby benefiting a stable cutting step. Then the two cutting planes converged at a cutting edge and the connection of the main threaded section to one end of the cutting edge speedily remove the cutting debris generated in the drilling step and avoid a large amount of accumulation of debris within the object. Accordingly, the drilling resistance is decreased, and the drilling speed is increased. Thus, the screw of the present invention could be firmly and smoothly sunk in the object for benefiting a further processing.
Abstract
A screw includes a positioning member defined on inclined cutting planes of a drilling portion of the screw for allowing a cutting edge constructed at a convergence of the cutting planes to cut stably and efficiently. A main threaded section formed on a shank of the screw is extended to connect with one end of the cutting edge. The positioning member helps the screw fixedly stand on an object. The cutting edge and the cutting planes allow cutting debris to be swiftly and smoothly extruded therefrom into the main threaded section for avoiding the accumulation of considerable cutting debris. Thereby, the screwing resistance is reduced and the drilling speed is promoted. Preferably, the fastened screw is firmly sunk in the object, and the fastening operation is completed successfully.
Description
- This invention is a continuation of the U.S. patent application Ser. No. 13/222,071, filed on Aug. 31, 2011, of which the subject matter is incorporated herein by reference in its entirety.
- 1. Field of the Invention
- The present invention relates to a fastener design, particularly to a screw capable of reducing the screwing resistance and increasing the drilling speed.
- 2. Description of the Related Art
- Referring to
FIG. 1 , aconventional screw 1 comprises ashank portion 11, ahead portion 12 disposed at one end of theshank portion 11, adrilling portion 13 disposed at the other end of theshank portion 11, and a plurality of threadedunits 14 spirally disposed around theshank portion 11. Wherein, thedrilling portion 13 is formed into a tapered end. Thus, thescrew 1 directly enters anobject 2 via the drilling of thetapered drilling portion 13, and the following threadedunits 14 continue entering theobject 2 so as to achieve a fastening effect. - The
screw 1 might be smoothly fastened into theobject 2 by using thedrilling portion 13 to pierce theobject 2. However, in practice, theobject 2 is forcedly pierced by thetapered drilling portion 13. Thus, fibers of theobject 2 are difficult to be severed efficiently. That is to say, the fibers are just simply pushed and thrust by thetapered drilling portion 13, so thescrew 1 would be easily impeded by debris resulted from theobject 2 while drilling. As a result, the debris can not be timely expelled, and the heaped debris incurs an increasing resistance on thescrew 1. Therefore, the operation of fastening thescrew 1 is influenced. - Referring to
FIG. 2 , theupright screw 1 in theobject 2 might be subject to rustiness when thehead portion 12 is waterlogged. Therefore, in the practical application, thescrew 1 is inclinedly drilled into theobject 2. Herein, if the cutting debris can not be timely expelled, thehead portion 12 is easily protruded from the surface of theobject 2 after screwing. Such abnormal operation is unbeneficial for further fastening and processing. Therefore, thescrew 1 needs improvements. - It is therefore the purpose of this invention to provide a screw that is able to timely expel debris, efficiently decrease the screwing resistance, and preferably promote the screwing speed so as to allow the screw to be sunk in an object firmly.
- The screw in accordance with the present invention comprises a shank portion, a head portion disposed at one end of the shank portion, a drilling portion disposed at the other end of the shank portion, and a main threaded section with a plurality of threaded units spirally disposed around the shank portion. Two inclined cutting planes are formed on the drilling portion and are connected at a cutting edge. The cutting edge extendedly defines two ends. A positioning member is defined on the cutting planes of the drilling portion for stabilizing the cutting edge to execute cutting. The main threaded section extends toward the cutting edge and connects to one end of the cutting edge for communicating the main threaded section with the drilling portion.
- Preferably, a threaded section with a plurality of auxiliary threaded units is disposed around the shank portion, the auxiliary threaded units are disposed between the threaded units of the main threaded section, and a first diameter of the auxiliary threaded units is smaller than a second diameter of the threaded units.
- Preferably, a plurality of indented units can be defined on the auxiliary threaded units, and a plurality of slots can be defined on part of the threaded units.
- Preferably, the positioning member is integrally protruded outwards from the cutting planes to form a pointed unit.
- Preferably, the pointed unit is formed by a plurality of inclined walls to structure a pyramid.
- Preferably, the pointed unit is structured into a cone.
- Preferably, the positioning member is formed by a plurality of inclined walls that are recessed from the cutting planes, thereby forming a valley on the cutting planes. Each inclined wall and the cutting edge are converged at one point.
- Accordingly, the positioning member helps the cutting edge stably stand on a screwing object, which allows the cutting edge to provide a scraping effect at the time of drilling. Further, the cutting planes guide cutting debris to smoothly enter the channel between the threaded units so as to rapidly expel the cutting debris therefrom. Thereby, a large amount of cutting debris is not accumulative in the vacancy of the threaded units, so the screwing resistance could be decreased, and the screwing speed could be increased. Moreover, the screw is favorably sunk in the object for facilitating the further operation.
-
FIG. 1 is a schematic view showing a conventional screw; -
FIG. 2 is a schematic view showing the conventional screw; -
FIG. 3 is a schematic view showing a first preferred embodiment of the present invention; -
FIG. 4 is an end view ofFIG. 3 ; -
FIG. 5 is a partial schematic view showing a second preferred embodiment of the present invention; -
FIG. 6 is a schematic view showing the first preferred embodiment of the present invention in screwing; -
FIG. 7 is a schematic view showing a third preferred embodiment of the present invention; -
FIG. 8 is an end view ofFIG. 7 ; -
FIG. 9 is a schematic view showing a fourth preferred embodiment of the present invention; -
FIG. 10 is a schematic view showing a fifth preferred embodiment the present invention; -
FIG. 11 is a schematic view showing a sixth preferred embodiment of the present invention; and -
FIG. 12 is a schematic view showing a seventh preferred embodiment of the present invention. - Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
- Referring to
FIG. 3 , a first preferred embodiment of the present invention is shown. In order to show the features of thescrew 3 clearly, thescrew 3 in this figure is presented by one side. Ascrew 3 comprises ashank portion 31, ahead portion 32 disposed at one end of theshank portion 31, adrilling portion 33 disposed at the other end of theshank portion 31, and a main threadedsection 34 with a plurality of threaded units spirally disposed around theshank portion 31. Wherein, achannel 341 is defined amid the threadedunits 34. Further referring toFIG. 4 , twoinclined cutting planes 331 are convergently formed on thedrilling portion 33, and acutting edge 332 is formed on the convergence of thecutting planes 331. Thecutting edge 332 extendedly defines twoends 333. Additionally, apositioning member 334 is defined on thecutting planes 331 to provide the screw 3 a positioning effect on an object while drilling. Herein, thepositioning member 334 is integrally protruded outwards from thecutting planes 331 to structure a pointed unit . In this embodiment, the pointed unit of thepositioning member 334 is preferably assembled by a plurality ofinclined walls 334′ protruded from thecutting planes 331, for example, there are fourinclined walls 334′ forming a square pyramid as illustrated. Alternatively, the pointed unit of thepositioning member 334 can be structured by a cone protruded from the cutting planes 331. For example, an oblate cone could be especially defined on the cuttingplanes 331 as preferably shown inFIG. 5 . Continuingly, thecutting edge 332 preferably scrapes the object while drilling. Moreover, while the main threadedsection 34 around theshank portion 31 extends to thecutting edge 332 and connects to oneend 333 of thecutting edge 332, thechannel 341 is formed as an intercommunicated channel amid the threaded units of the main threadedsection 34 for being communicated with thedrilling portion 33. - Referring to
FIG. 6 , in operation, thee positioning member 334 is propped up against an object 4 (e.g. a plywood) for achieving a stable positioning effect. Thereby, thehead portion 32 is imparted by a screwing torque for driving thedrilling portion 33 to rotate. At the time of contacting thecutting edge 332 with theobject 4, a gradual screwing effect is brought about, and thecutting edge 332 is applied to cut and sever theobject 4 with a sharp progression. By means of the connection of the main threadedsection 34 to oneend 333 of thecutting edge 332 and the arrangement of the inclined cutting planes 331, the cutting debris generated in the drilling step is conducted to enter from the cuttingplanes 331 of thedrilling portion 33 into thechannel 341 among the threaded units of the main threadedsection 34 directly so that the cutting debris is promptly removed through thechannel 341 to prevent a large amount of cutting debris from obstructing and compressing the vacancy between thescrew 3 and theobject 4. Therefore, the present invention facilitates a reduced fastening resistance and allows thescrew 3 to provide a stable fastening effect when thescrew 3 is gradually drilled for being sunk into theobject 4. Favorably, however thescrew 3 is positioned upright or slantwise, a firm and stable positioning effect of thescrew 3 in theobject 4 is ensured, and thescrew 3 is sunk in theobject 4 without exposing to the outside. As result, theobject 4 has a smooth appearance for benefiting a further processing. - Referring to
FIG. 7 andFIG. 8 , a third preferred embodiment is shown. In order to show the features of thescrew 3 clearly, thescrew 3 in these figures is shown by another sides. Wherein, thescrew 3 still comprises theshank portion 31, thehead portion 32, thedrilling portion 33, and the main threadedsection 34 with threaded units. Differently, the positioningmember 334 is assembled by a plurality ofinclined walls 334′ that are recessed on the cutting planes 331, thereby forming avalley 335 thereon. Additionally, a point P is defined on the convergence of eachinclined wall 334′ and thecutting edge 332 to give theflat cutting edge 332 and the cutting planes 331 a support on the object (not shown) at the time of drilling and obtain an accurate and stable positioning effect, Further, by the cooperation of thecutting edge 332 and the threaded units of the main threadedsection 34, thescrew 3 could be speedily drilled in the object by the efficient cutting and removal of debris which facilitates a decrease in the screwing resistance. As a result, thescrew 3 is able to provide a speedy fastening effect and is firmly sunk into the object after drilling. - Referring to
FIG. 9 andFIG. 10 , a fourth and a fifth preferred embodiment are shown. Thescrew 3 still comprises ashank portion 31, ahead portion 32, adrilling portion 33, and a main threadedsection 34 with a plurality of threaded units. The correlation of elements and functions are the same as those of previous preferred embodiments and herein are omitted. In this embodiment, a threaded section A is further defined on theshank portion 31. Wherein, the threaded section A comprises a plurality of auxiliary threadedunits 35 that are spirally disposed between. the threadedunits 34. Additionally, a first diameter r2 of the auxiliary threadedunits 35 is smaller than a second diameter r1 of the threaded units of the main threadedsection 34. Accordingly, thescrew 3 attains a high-low threaded arrangement by setting the auxiliary threadedunits 35 of the threaded section A between the threaded units of the main threadedsection 34. Such high-low threaded units are beneficial to accelerate the speed of debris removal, decrease the drilling resistance, and prevent the large amount of accumulation of debris. Favorably, thescrew 3 is smoothly and speedily fastened into the object and is firmly sunk. into the object after the fastening operation. - Referring to
FIG. 11 andFIG. 12 , a sixth and a seventh preferred embodiment of the present invention are shown. This embodiment is characterized in that a plurality ofindented units 351 can be defined on the auxiliary threadedunit 35. Further, a plurality ofslots 342 are formed on part of the threaded units of the main threadedsection 34. Accordingly, theslots 342 and theindented units 351 assist thedrilling portion 33 of thescrew 3 in increasing the drilling and cutting effect and promoting the removal of debris, thereby allowing the drilling friction and the resistance to be largely reduced and increasing the fastening efficiency. Thescrew 3 is sunk in theobject 4 after the drilling step, and a firm and stationary fastening performance is achieved. - To sum up, the present invention takes advantage of the positioning member to help a stable positioning effect at the beginning of the drilling operation, thereby benefiting a stable cutting step. Then the two cutting planes converged at a cutting edge and the connection of the main threaded section to one end of the cutting edge speedily remove the cutting debris generated in the drilling step and avoid a large amount of accumulation of debris within the object. Accordingly, the drilling resistance is decreased, and the drilling speed is increased. Thus, the screw of the present invention could be firmly and smoothly sunk in the object for benefiting a further processing.
- While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Claims (15)
1. A screw comprising a shank portion, a head portion disposed at one end of said shank portion, a drilling portion disposed at the other end of said shank portion, and a main threaded section with a plurality of threaded units spirally disposed around said shank portion;
wherein said drilling portion has two inclined cutting planes which are connected at a cutting edge, said cutting edge extendedly defining two ends, a positioning member being defined on said cutting planes of said drilling portion for dividing said cutting edge and stabilizing said cutting edge to execute cutting; said main threaded section extending toward said cutting edge and connecting to one end of said cutting edge for communicating said main threaded section with said drilling portion.
2. The screw as claimed in claim 1 , wherein, a threaded section including a plurality of auxiliary threaded units is disposed around said shank portion and disposed between said threaded units of said main threaded section, and a first diameter of said auxiliary threaded units is smaller than a second diameter of said threaded units of said main threaded section.
3. The screw as claimed in claim 2 , wherein, a plurality of indented units are defined on said auxiliary threaded units, and a plurality of slots are defined on part of said threaded units of said main threaded section.
4. The screw as claimed in claim 1 , wherein said positioning member is integrally protruded outwards from said cutting planes to form a pointed unit.
5. The screw as claimed in claim 2 , wherein said positioning member is integrally protruded outwards from said cutting planes to form a pointed unit.
6. The screw as claimed in claim 3 , wherein said positioning member is integrally protruded outwards from said cutting planes to form a pointed unit.
7. The screw as claimed in claim 4 , wherein, said pointed unit is formed by a plurality of inclined walls to structure a pyramid.
8. The screw as claimed in claim 5 , wherein, said pointed unit is formed by a plurality of inclined walls to structure a pyramid.
9. The screw as claimed in claim 6 , wherein, said pointed unit is formed by a plurality of inclined walls to structure a pyramid.
10. The screw as claimed in claim 4 , wherein, said pointed unit is structured into a cone.
11. The screw as claimed in claim 5 , wherein, said pointed unit is structured into a cone.
12. The screw as claimed in claim 6 , wherein, said pointed unit is structured into a cone.
13. The screw as claimed in claim 1 , wherein, said positioning member is formed by a plurality of inclined walls that are recessed inwards from said cutting planes for forming a valley on said cutting planes, and each of said inclined walls and said cutting edge are converged at a point.
14. The screw as claimed in claim 2 , wherein, said positioning member is formed by a plurality of inclined walls that are recessed inwards from said cutting planes for forming a valley on said cutting planes, and each of said inclined walls and said cutting edge are converged at a point.
15. The screw as claimed in claim 3 , wherein, said positioning member is formed by a plurality of inclined wails that are recessed inwards from said cutting planes for forming a valley on said cutting planes, and each of said inclined walls and said cutting edge are converged at a point.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/078,934 US20140064878A1 (en) | 2011-08-31 | 2013-11-13 | Screw |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/222,071 US8740531B2 (en) | 2011-08-31 | 2011-08-31 | Screw |
US14/078,934 US20140064878A1 (en) | 2011-08-31 | 2013-11-13 | Screw |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/222,071 Continuation US8740531B2 (en) | 2011-08-31 | 2011-08-31 | Screw |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140064878A1 true US20140064878A1 (en) | 2014-03-06 |
Family
ID=47743982
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US13/222,071 Active 2032-04-16 US8740531B2 (en) | 2011-08-31 | 2011-08-31 | Screw |
US14/078,934 Abandoned US20140064878A1 (en) | 2011-08-31 | 2013-11-13 | Screw |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US13/222,071 Active 2032-04-16 US8740531B2 (en) | 2011-08-31 | 2011-08-31 | Screw |
Country Status (1)
Country | Link |
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US (2) | US8740531B2 (en) |
Cited By (4)
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US9581183B2 (en) | 2015-02-17 | 2017-02-28 | The Hillman Group, Inc. | Screw-type fastener |
US10436238B2 (en) | 2016-04-04 | 2019-10-08 | The Hillman Group, Inc. | Screw type fastener |
US10982703B2 (en) | 2018-04-09 | 2021-04-20 | The Hillman Group, Inc. | Screw-type fastener for concrete and hurricane resistance applications |
US11105361B2 (en) | 2017-11-03 | 2021-08-31 | The Hillman Group, Inc. | Screw-type fastener |
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US9802300B2 (en) | 2010-01-13 | 2017-10-31 | National Nail Corp. | Fastener, installation tool and related method of use |
US9120214B2 (en) | 2010-01-13 | 2015-09-01 | National Nail Corp. | Fastener, installation tool and related method of use |
US9144896B2 (en) | 2010-01-13 | 2015-09-29 | National Nail Corp. | Fastener, installation tool and related method of use |
US8480343B2 (en) * | 2010-01-13 | 2013-07-09 | National Nail Corp. | Fastener, installation tool and related method of use |
US8955210B2 (en) | 2010-01-13 | 2015-02-17 | National Nail Corp. | Fastener, installation tool and related method of use |
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USD854404S1 (en) * | 2017-06-16 | 2019-07-23 | Masterpiece Hardware Industrial Co., Ltd. | Screw |
US11149445B2 (en) | 2017-08-15 | 2021-10-19 | National Nail Corp. | Hidden fastener unit and related method of use |
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US11111679B2 (en) | 2017-08-15 | 2021-09-07 | National Nail Corp. | Hidden fastener unit and related method of use |
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US10772667B2 (en) * | 2017-12-22 | 2020-09-15 | Medos International Sarl | Bone screw with cutting tip |
USD842086S1 (en) | 2018-02-26 | 2019-03-05 | National Nail Corp. | Screw |
US20220145922A1 (en) * | 2020-11-12 | 2022-05-12 | Sfs Intec Holding Ag | Self-drilling, anti-burr, threaded fastener |
US11731252B2 (en) | 2021-01-29 | 2023-08-22 | National Nail Corp. | Screw guide and related method of use |
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USD1022684S1 (en) | 2023-02-23 | 2024-04-16 | National Nail Corp. | Fastener positioning device |
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US438754A (en) * | 1890-10-21 | Island | ||
US3083609A (en) * | 1959-05-28 | 1963-04-02 | Gen Am Transport | Self-tapping screw having its thread interrupted by longitudinally extending and circumferentially spacedapart flutes |
US3937119A (en) * | 1974-12-23 | 1976-02-10 | Illinois Tool Works, Inc. | Masonry anchor device |
DE3346704A1 (en) * | 1983-12-23 | 1985-07-04 | Richter-System GmbH & Co KG, 6103 Griesheim | SELF-TAPING QUICK-SCREW SCREW |
US6186716B1 (en) * | 1998-11-12 | 2001-02-13 | Westerlund Products Corporation | Anchor bolt |
SE516229C2 (en) * | 2000-05-26 | 2001-12-03 | Eero Nygaard | drill point |
US7090453B2 (en) * | 2004-12-27 | 2006-08-15 | Teng-Hung Lin | Screw |
CN2761900Y (en) * | 2005-01-10 | 2006-03-01 | 陈金孙 | Guiding screw |
DE102006026176A1 (en) * | 2006-05-29 | 2007-12-06 | Adolf Würth GmbH & Co. KG | Self-drilling screw |
-
2011
- 2011-08-31 US US13/222,071 patent/US8740531B2/en active Active
-
2013
- 2013-11-13 US US14/078,934 patent/US20140064878A1/en not_active Abandoned
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9581183B2 (en) | 2015-02-17 | 2017-02-28 | The Hillman Group, Inc. | Screw-type fastener |
US10247219B2 (en) | 2015-02-17 | 2019-04-02 | The Hillman Group, Inc. | Screw-type fastener |
US10436238B2 (en) | 2016-04-04 | 2019-10-08 | The Hillman Group, Inc. | Screw type fastener |
US11105361B2 (en) | 2017-11-03 | 2021-08-31 | The Hillman Group, Inc. | Screw-type fastener |
US10982703B2 (en) | 2018-04-09 | 2021-04-20 | The Hillman Group, Inc. | Screw-type fastener for concrete and hurricane resistance applications |
Also Published As
Publication number | Publication date |
---|---|
US20130051955A1 (en) | 2013-02-28 |
US8740531B2 (en) | 2014-06-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TAIWAN SHAN YIN INT'L CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SU, KOU-TSAIR;SU, YU-JUNG;REEL/FRAME:031695/0596 Effective date: 20131113 Owner name: BIOMATE MEDICAL DEVICES TECHNOLOGY CO., LTD., TAIW Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SU, KOU-TSAIR;SU, YU-JUNG;REEL/FRAME:031695/0596 Effective date: 20131113 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |