Class / Patent application number | Description | Number of patent applications / Date published |
411412000 | Plural threads on single shank | 27 |
20080232926 | Screw - The present invention is in particular to a first threaded section and a second threaded section both consisted of a plurality of threads are spirally disposed on the shank and connecting each other. Moreover, said first threaded section is a continuous threaded section, and said second threaded section is a non-continuous threaded section. While in operation, with said first threaded screwing, the user can save more labor in screwing the present invention. Further accompanying with said non-continuous second threaded section, the debris cut from the object can be accumulated inside said second threaded section and connected together. Therefore, the present invention will be well fastened into the object after screwing. | 09-25-2008 |
20090162165 | SCREW FOR FASTENING WOODEN MATERIALS - A screw includes a shank portion including a tapered bottom section having a tip, a head on top of the shank portion, and first and second helical threads. The first helical thread extends helically around the shank portion in a first direction between the tip and the head, and has a first end distal from the head, and a second end opposite to the first end. The second helical thread extends helically around the shank portion in a second direction between the first helical thread and the tip, and has a third end proximate to the second end of the first helical thread. The first and second directions are opposite to each other. A non-helical ridge extends around the shank portion between the first and second helical threads. | 06-25-2009 |
20090169334 | Bimate screw - The present invention pertains to a bimate screw providing with a first section alternating with a second threaded section; wherein, the second threaded section has a smaller outer diameter than the first threaded section, and further a plurality of concavities are disposed on each thread of the second threaded section for defining two flanks therein. In this manner, both the first and the second threaded sections facilitate to sever and shatter cuttings so as to reduce the screwing resistance and prevent the object from being damaged under the accumulation of cuttings; simultaneously, the bimate screw effectively attains to a good resistance of extraction from the object by the concavities receiving the remaining cuttings which are not guided out of the object. | 07-02-2009 |
20100135747 | EXTRUSION BLOW MOLDED COMPONENT MADE OF THERMOPLASTIC - The invention relates to an extrusion blow-molded component ( | 06-03-2010 |
20110002753 | THREADED CONCRETE ANCHOR - A fastener for use in concrete includes a shank and a head. The shank has a tip distal most from the head. The shank includes a first helical thread formation having a thread form thereon formed from two portions disposed upon opposite lateral sides of the thread form. The thread form has a root and the two portions include an alternating series of lobe members and base portions. The lobe members have a height as measured from the root and the base portions have a height as measured from the root. The height of the lobe members is greater than the height of the base portions and the height of the base portions is greater than zero. The fastener includes a second helical thread formation that is disposed adjacent to and spaced from the first helical thread formation. | 01-06-2011 |
20110014007 | MASONRY ANCHOR - A masonry anchor includes a head and a body integral to the head and extending therefrom. At least one helical male thread surrounds the body and includes a leading face and a trailing face substantially perpendicular to the body disposed between the leading face and the head. The trailing face intersects the leading face at a thread crest. | 01-20-2011 |
20110076112 | CONCRETE BOLT - A concrete bolt includes a hexagonal head part and a bolt body extended from the head part. A bottom end of the bolt body is a bevel, a surface of the bolt body has high-tooth and low-tooth threads helically extended and arranged alternately. A tooth end of the high-tooth thread is tilted outward, an end surface facing toward the head part is concaved, the low-tooth thread is roughly in a trapezoidal shape and a high-tooth thread adjacent to the bottom end has petal-shaped teeth arranged alternately. When locking into concrete, the bolt is operated more easily to save labor work by cutting with the high-tooth threads and guiding and balancing functions with the low-tooth threads. Additionally, the concrete cut is coagulated after locking, thus the bolt is more robust by having a high tensile strength and easily dismantled for repetitive use, thereby improving a practical value of the concrete bolt. | 03-31-2011 |
20110188966 | FASTENING SCREW BOLT - A fastening screw bolt includes a head connected to a screw rod. The screw rod includes a helical thread having a plurality of helical turns each of which turns one revolution around the screw rod. Each helical turn has a helical cutting edge formed with at least two angularly spaced apart notches. With the notches, the screw bolt can achieve an improved engagement with a hole into which the screw bolt is inserted. | 08-04-2011 |
20110200410 | ANTI CROSS-THREAD BOLT - To provide an anti cross-thread bolt which prevents itself from being cross-threaded without the need for correcting its posture by a pilot portion. The bolt is screwed into a female screw having a nominal diameter D and an inner diameter D | 08-18-2011 |
20110217145 | WOOD FASTENER - Fasteners are provided that include a head and having a head, a tip end having a tip, a first body portion having right-hand threads, and a second body portion having left-hand threads. The first body portion is adjacent to the tip end of the fastener and extends a first distance along a length of the fastener towards the head end. The second body portion is adjacent to the first body portion, and extends the head end of the fastener and extending a second distance along the length of the fastener towards the head end. The right-hand threads, and the left-hand threads, can have a pitch angle α of less than about 60°. | 09-08-2011 |
20110262245 | DOUBLE-END THREADED BODY AND INTERNALLY-THREADED BODY - An object of the present invention is to provide a duplex threaded body having a right-handed thread and a left-handed thread on the circumferential surface of a single solid member. In addition, an object of the present invention is to provide a single-nut or double-nut type internally-threaded body that demonstrates a locking effect even at an intermediate position without substantially loosening by using a combination of a duplex externally-threaded body and one or more internally-threaded bodies. Moreover, an object of the present invention is to provide a screw structure in which a pair of internally-threaded bodies can only be removed by destruction once they are mutually coupled when screwed onto a duplex externally-threaded body, thereby making it possible to impart tamper-proof characteristics in addition to a locking effect. The duplex externally-threaded body of the present invention has, on the outer circumferential surface of a rod-like member, an overlapping region in which a clockwise spiral right-handed thread and a counter-clockwise spiral left-handed thread are provided in at least an overlapping manner. Moreover, the present invention makes it possible to use, alone or in combination, a right-handed internally-threaded body in which a right-handed thread is formed, and a left-handed internally-threaded body in which a left-handed thread is formed, that are screwed onto a duplex externally-threaded body. | 10-27-2011 |
20120155990 | SCREW STRUCTURE - An improved screw includes a head and a shank. The head has a wrench cavity on the top to be driven by a screwdriver. The shank is connected to the bottom of the head. The shank has a round shank at an upper end close to the head to form a left-hand thread section, and a triangular shank at a lower end to form a right-hand thread section. The left-hand and right-hand thread sections have thread points formed in an asymmetrical manner. The right-hand thread section further has an upper thread section and a lower thread section at the bottom to form the tip. The lower thread section has saw-toothed threads. Thus tapping efficiency improves when the screw is fastened to a workpiece, and faster and firmer fastening can be achieved. | 06-21-2012 |
20120207564 | WOOD FASTENER - Fasteners are provided that include a head and having a head, a tip end having a tip, a first body portion having first threads having a pitch angle, and a second body portion having second threads, the second threads having a different pitch than the first threads. The first body portion is adjacent to the tip end of the fastener and extends a first distance along a length of the fastener towards the head end. The second body portion is adjacent to the first body portion, and extends the head end of the fastener and extending a second distance along the length of the fastener towards the head end. | 08-16-2012 |
20140119852 | ANTI-LOOSE SCREW - An anti-loose screw suitable for fastening various construction work pieces comprises: a screw head; a cylindrical rod, coupled to the screw head; a high thread and a low thread, spiraling around the cylindrical rod, and uniformly distributed on the cylindrical rod, wherein the crests of the low thread on the cylindrical rod are machined by a cutter to form cut slots and irregular burrs. When the screw is driven into a construction work piece, those two uniformly distributed high and low threads can keep the balance of the advancing screw so that the advancing screw can be free from any deviation. Further, the extruded scraps will be concentrated to provide a superior anchoring effect. Furthermore, in cooperation with the wrapping effect of the expanding material of the work piece, the cut slots and burrs formed via the machining of a cutter can raise the anti-loose capability of the screw. | 05-01-2014 |
20150322991 | SCREWS - A screw comprises an enlarged head; a large diameter screw rod having one end extending from the enlarged head; a small diameter screw rod having one end extending from another end of the large diameter screw rod; another end of the small diameter screw rod being formed as a tip end; a first thread extending from the large diameter screw rod and the small diameter screw rod; and the first thread extending to the tip end of the small diameter screw rod. A diameter of the first thread on the large diameter screw rod is large than that of the first thread on the small diameter screw rod. A pitch of the first thread on the large diameter screw rod is smaller than or equal to that of the first thread on the small diameter screw rod. | 11-12-2015 |
20180023611 | THREAD PROFILES FOR ROTARY SHOULDERED CONNECTIONS | 01-25-2018 |
411413000 | Of different pitch | 11 |
20080219801 | Screw Fastener - A screw fastener includes a head portion, a shaft portion extending from the head portion, and at least one locking serration. The shaft portion has a helical thread structure defining a thread part and a root part. The locking serration protrudes from the root part of the helical thread structure. The locking serration is configured and arranged to allow rotation of the shaft portion in a fastening direction and to restrict rotation of the shaft portion in a non-fastening direction upon engaging with a workpiece. | 09-11-2008 |
20080292429 | Thread-Forming Screw - A thread-forming screw includes a screw end, a shank, and a thread-free head, wherein the shank is provided at least partly with a thread and has a pre-forming region, an intermediate region, which is arranged to follow the pre-forming region, and an anchoring region, which is arranged so as to adjoin the intermediate region and below the head, wherein the pre-forming region is arranged so as to directly adjoin the screw end. | 11-27-2008 |
20090003969 | LINEAR ADJUSTMENT ASSEMBLY - An adjusting device for repositioning a movable component relative to a stationary component includes a shank having a head at one end thereof and a distal tip at an opposite end thereof. The adjusting device also includes a first thread formed on the shank, the first thread disposed in a helical pattern along the shank, and a reversing thread formed on the shank, the reversing thread disposed in a helical pattern along the axial surface of the shank, the reversing thread helical pattern is formed in a direction that is opposite to the helical pattern of the first thread. Also described herein is a linear adjustment assembly that includes an adjusting device and a retaining device. The retaining device includes a thread disposed in a helical pattern along an interior surface of the retaining device having a helical pattern that is substantially similar to the first thread helical pattern. | 01-01-2009 |
20090010734 | SCREW - The present invention pertains to a screw including a head, a shank having a first clockwise-threaded section and a counterclockwise-threaded section, and a drilling portion with a bottom end. Particularly, the counterclockwise-threaded section spiraling downward from the head connects to the first clockwise-threaded section by concurrently engaging their respective thread ends together. Therefore, the present invention applies the convergence of the two thread ends to efficiently guide the debris cutting by the first clockwise-threaded section and the counter force of the counterclockwise-threaded section to squeeze the debris back and share it among the threaded sections during the gradual travel of the shank through the articles, thereby reducing the drilling resistance and saving the labor imparting to the screw. Furthermore, the clockwise and the counterclockwise sections also counterbalance to steadily keep the screw buried in the articles without loosening. | 01-08-2009 |
20090110515 | SCREW FOR USE IN NONMETAL OBJECTS - The present invention pertains to a screw for use in nonmetal objects comprising a plurality of cut-aiding portions formed by the longer and shorter cutting surfaces inclined toward opposite directions. Further, a cutting edge formed by the junction of any two adjacent cutting surfaces presents in a fastening direction of the screw. Thus, the cutting edge assists the threads to thoroughly severe and to shatter the fibers and debris of the objects, which can also be accommodated into the cut-aiding portions. Also, the ridge of the longer cutting surface aids in cutting fibers and further guides the debris out. In this manner, the present invention facilitates to enhance cutting capability for obtaining less screwing resistance, to prevent the destruction of the object and to increase the screwing speed. | 04-30-2009 |
20090142161 | Screw Anchor - A screw anchor for fastening wooden construction parts on concrete or masonry comprises a shaft having a first threaded portion with a wood screw thread to be screwed into wood and a second threaded portion with a concrete thread to be screwed into concrete, the wood screw thread having the same or a somewhat smaller pitch than the pitch of the concrete thread. | 06-04-2009 |
20090245973 | Screw for composite/plastic materials - A fastener for composite or plastic material having a dense composition employs a head which has a socket and a recessed underside and a lower rim. In one embodiment, the shank has an upper portion with an enlarged diameter and a left hand thread while the lower portion has a tri-lobed configuration and is traversed by a right hand thread. The right hand thread may have a plurality of notches which, in one embodiment, are arranged in a spiral array. One embodiment of a fastener has longitudinally spaced rings which project from an enlarged diameter portion of the shank. The lower portion of the shank has a thread with a plurality of notches. The rings have a major diameter and spacing greater than the major diameter and spacing of the thread. | 10-01-2009 |
20100196122 | SCREW - A fastener for securing remnant-producing materials, a method of manufacturing the fastener, and a method of using the fastener are provided. The fastener is configured such that in use any remnants or slivers produced by rotation of the fastener are forcibly driven into the surface of the material. In one aspect, the fastener has two separate threaded portions, a first or lower threaded portion and a second or upper threaded portion. The threads on the lower threaded portion have a pitch that is different from the threads on the upper threaded portion. In one embodiment, the lower threaded portion threads have a larger pitch than the threads on the upper threaded portion. In use, after the lower threaded portion is completely inserted into the material, the upper threaded portion of the fastener enters the material. Because the upper threaded portion has threads that have a pitch that is different from the threads on the lower threaded portion, the threads on the upper threaded portion capture the remnants that have been extruded within or onto the surface of the material. As the fastener is completely inserted into the material, the remnants that have been extruded by the lower threaded portion of the fastener are substantially retained in the bore by the upper threaded portion of the fastener. | 08-05-2010 |
20120177462 | VARIABLE ANGLED LOCKING SCREW - A variable angle locking screw assembly that includes a plate material, a screw, and a washer at least partially located within the plate material, the washer and screw cooperating to create a wedge locking the screw in one of a plurality of axial and rotational positions, where the locked position may be undone and adjusted by manipulation of at least one of the screw and washer. | 07-12-2012 |
20140105706 | EXCHANGEABLE WHEEL STUD - A wheel stud includes a fixing segment, which has a first external thread, and a receiving segment, which has a second external thread. Here, the first external thread runs opposite in direction to the second external thread. More particularly, the wheel stud is configured to be connected to a wheel hub through the fixing segment, where the wheel hub includes at least one receiver bore having an internal thread corresponding to the first external thread. | 04-17-2014 |
20140334898 | FASTENER - A fastener for locking two or more sheet sections together comprises a shaft tapered at one end and having a driving head at the other end with a relatively coarse thread running from the tapered end towards the head and a relatively fine thread between the coarse thread and the head. The fine thread has a pitch which is approximately equal to the thickness of the sheet sections and extends from the head for from two to six threads. | 11-13-2014 |