Class / Patent application number | Description | Number of patent applications / Date published |
411412000 |
Plural threads on single shank
| 27 |
411424000 |
Shank structure
| 22 |
411417000 |
Circumferentially interrupted thread
| 8 |
411415000 |
Of varying thread pitch | 4 |
20080206015 | Screw comprising a thread-forming thread, blank for the production of said screw, and screw connection - The invention relates to a screw | 08-28-2008 |
20110008129 | THREADED CONNECTOR WITH INTERLOCK - A threaded connector includes a base and a threaded male portion projecting axially outward from the base. The threaded male portion is adapted to mate with an associated threaded female socket. The threaded male portion includes a helical thread comprising three sections: (i) a lead-in section; (ii) a transitional cam-locking section; and, (iii) a friction-locking section. The friction-locking section is located adjacent the base, the lead-in section is spaced from the base, and the transitional cam-locking section connects the lead-in section to the friction-locking section. The helical thread includes a tip and a root. The lead-in section is defined by a first major diameter at the tip of said thread and the friction-locking section is defined by a second major diameter at the tip of the thread. The second major diameter is greater than the first major diameter. The transitional cam-locking section includes a locking cam defined by a varying magnitude major diameter at the tip of the thread that increases from the first major diameter to the second major diameter in a smooth, continuous transition without interrupting the helical thread. | 01-13-2011 |
20120315110 | WAVE THREAD FORM - A wave thread form for threaded fasteners includes multiple thread pitches along a generally helical path, and includes multiple wave thread portions each deviating from a straight-line helical path, with adjacent wave thread portions along the helical path being separated by standard thread portions extending along the generally straight-line helical path. | 12-13-2012 |
20140286729 | TAPPING SCREW - There is provided a tapping screw having a high anti-loosening effect and a high pull-out resistance for resin-molded components. A tapping screw | 09-25-2014 |
411416000 |
Lobular thread | 3 |
20090269164 | Fastener for stucco or hard board substrates - A self-tapping fastener, which has been especially constructed for use in connection with the insertion and installation thereof into stucco, gypsum, wallboard, or other hard board substrates, wherein the forward end portion of the shank portion of the self-tapping fastener is provided with a pair of diametrically opposed flat sections which effectively form at least one pair of diametrically opposed tapping threads so as to effectively perform the thread tapping process despite exhibiting some abrasion of the forwardmost threads. In addition, the flat sections also effectively define recessed pockets for accommodating any dust, particles, debris, or the like, which will be generated during the thread tapping process. | 10-29-2009 |
20110280685 | SCREW WITH LOW DRILLING RESISTANCE - A screw with low drilling resistance comprises a head portion, a shank portion, a plurality of first threads, a drilling portion, and a plurality of second threads. Wherein, a plurality of opening slots are correspondingly defined on the second threads, and a first included angle of the first threads is smaller than a second included angle of the second threads. Thereby, the opening slots on the second threads efficiently provide the first threads with an auxiliary cutting effect and preferably offers a debris accommodating room. The first threads including the smaller first included angle favorably reinforce the bearing force of the second threads including the larger second included angle, thereby promoting the cutting effect of the screw and allowing a speedy screwing. | 11-17-2011 |
20160138640 | FASTENER - A fastener comprises a shank defining a shank root, a head, a drilling portion and main threads. Each of the main threads is inclined with respect to a shank axis by 60-82 degrees. At least one main lobe projects from the shank. The main lobe is extended outwards from the shank root and attached to at least one cutting face of each main thread. Accordingly, the inclining arrangement allows the main threads to have a large rotating angle at the time of drilling and increase the drilling speed. By the main lobe in connection with the main thread, the fastener attains the preferable torque and flexibility, enhances the torsion resistance and the tensile strength against the drilling stress to prevent the fastener from snapping and reduces the resonant vibratory effect caused by vibrations after the drilling action, thereby promoting a firm fastening effect. | 05-19-2016 |
411414000 |
Buttress thread | 1 |
20150010375 | SELF-TAPPING SCREW - A self-tapping screw having a head and an outer thread carrier with an end at which the outer thread has an outer diameter decreasing towards the end, at least over a part of the length thereof ending at the end, and the outer diameter of the outer thread decreases according to the draft angle of holes in which the screw is to be set. | 01-08-2015 |
Entries |
Document | Title | Date |
20080213065 | Joining assembly including a plastic support member and a plastic threaded element - A threaded element of plastic material for a joining assembly has a uniquely formed thread profile of a small profile angle between 30° and 50° and a rounded crest of a relatively large radius of curvature. The gap between the revolutions of the thread is of a volume which exceeds that of the thread. In order to provide for a specific cutting geometry of the thread profile the threaded element comprises a plurality of angular segments which are radially offset with respect to each other such that adjacent angular segments provide cutting edges. Furthermore, a tool and a method for making such a joining assembly are disclosed. | 09-04-2008 |
20080226424 | Chipless thread-forming screw - A chipless thread-forming screw ( | 09-18-2008 |
20090003968 | Bolt and Manufacturing Method of Bolt - The present invention provides a surface hardening portion | 01-01-2009 |
20090047095 | THREAD FORMING FASTENER - A thread forming fastener for threading into a nut anchor of a pliable material wherein there is produced during the driving of the fastener a combination of forces that encourages the nut anchor material to flow smoothly and to develop a mating thread in the nut anchor that minimizes stress cracking and radial hoop stress as the mating thread is being formed. The fastener comprises a drive head and a shank extending from the head and having a longitudinal axis, the shank including a core and a thread having a selected axial pitch, a selected thread height and a profile which in axial cross-section includes a leading face, a trailing face and a tip. The leading face is composed of a radially inner concave portion having a first radius and which transitions smoothly to a radially outer convex portion having a second radius, the transition occurring at a point on the common tangent to those portions. The trailing face is composed of a radially inner linear portion which transitions at a selected transition location to a radially outer convex portion having a third radius. The profile also includes a convex blending portion having a fourth radius which blends together the radially outer leading and trailing face portions at the tip. The thread profile produces force vectors during assembly with the nut anchor that provide enhanced mating thread strength and improved resistance to nut anchor thread breakdown. | 02-19-2009 |
20090047096 | Screw - The present invention pertains to a screw with a first thread section comprised of a trailing and a leading thread segments respectively spiraled on a shank and a tip section. Distinctly, the leading thread segment defines a plane surface thereon to convergently engage with an adjacently thread peak on the trailing thread segment and further constructs a thread width greater than that of the trailing thread segment while aligning the two thread segments with a correspondent profile thread height. Such configuration of the plane surface accompanies its larger thread width to enlarge a drilling channel and accordingly renders an easy entry of the trailing thread segment into an object with less friction and higher screwing speed. Additionally, the debris is partially removed through the void between the enlarged channel and the trailing thread segment to avoid cracking the object, decrease drilling torque, and enhance the fastening capability. | 02-19-2009 |
20090104003 | Gas Turbine Engines Systems and Related Methods Involving Dimensionally Restored Fasteners - Gas turbine engines systems and related methods involving dimensionally restored fasteners are provided. In this regard, a representative method for dimensionally restoring a mechanical fastener for a gas turbine engine includes: providing a mechanical fastener; and relocating existing material of the fastener such that a dimension of the fastener is restored. | 04-23-2009 |
20090245972 | FASTENER WITH MULTIPLE THREADED SECTIONS - The present invention pertains to a triangular shank with multiple threaded sections essentially including a head, a shank and a drilling portion. Wherein the shank has two opposite threaded sections formed in triangular and a third threaded section spiraling on the drilling portion. The third threaded section with a planar flank assists in enlarging the drilling track and providing guidance for those two threaded sections to easily enter into the object so as to efficiently extrude the debris out of the object and retain remaining debris for a better fastening effect. Further the triangular configuration results in the less contact between the screw and the object in time of screwing, thus reducing the frictional resistance and obtaining high screwing speed. | 10-01-2009 |
20100143074 | COMPOSITE MEMBER FIXING STRUCTURE - A composite member | 06-10-2010 |
20100209213 | SYSTEM FOR FASTENING ACCESSORIES ON FRAMES MADE OF METAL MATERIAL FOR DOORS, WINDOWS, AND THE LIKE - A system for fastening an accessory ( | 08-19-2010 |
20100239387 | TAKE-UP FASTENER FOR RESISTING UPLIFT LOADS IN LIGHT FRAMED CONSTRUCTION - A take-up fastener is disclosed for fastening a level in a frame construction to the level below so as to resist upward forces generated by wind and other sources on the framed construction. The take-up fastener in general includes a take-up plate, or washer, fastened to a portion of the upper level and a take-up screw fit through the take-up plate and fastened to the adjacent level below. Once the take-up fastener is fully assembled, the take-up plate includes a pair of tabs which are capable of engaging threads on a take-up screw in a way that allows one-way motion of the take-up screw relative to the take-up plate. In particular, the take-up plate can move downward relative to the take-up screw, for example on constricting of the wooden members to which the take-up plate is affixed. However, the engagement between the take-up plate and take-up screw prevents movement of the take-up plate upward with respect to the take-up screw, for example upon an upward load due to wind or other external force. | 09-23-2010 |
20100266366 | FASTENER RETENTION SYSTEM - An apparatus includes structure defining a first hole that is characterized by an opening. A protuberance surrounds the opening and at least partially defines a concavity. A retention member is disposed within the concavity, and defines a second hole. The second hole has a first portion characterized by a first diameter and a second portion characterized by a second diameter. A threaded fastener has a flange characterized by a third diameter greater than the first diameter and less than the second diameter. The flange is disposed within the second portion of the second hole and between the first portion of the retention member hole and the first surface. Accordingly, the retention member retains the fastener in the concavity while permitting radial movement of the fastener. | 10-21-2010 |
20110014006 | SELF-TAPPING SCREW - According to the present invention, a self-tapping screw capable of obtaining large fastening force as accurately tapping an internal thread with small screwing torque includes a screw shaft | 01-20-2011 |
20110142569 | FASTENER WITH HARDENED THREADS - A threaded fastener includes a shank having a first, threaded portion and a hardened thread portion. The shank includes a thread extending outwardly from a shank body over a first length of the shank. A second portion of the shank includes a groove positioned coincident with the thread and including a turn ratio equal to a turn ratio of the thread. The shank comprises corrosive resistant stainless steel. A coil of hardened steel engages the groove to fill the groove along the second portion. | 06-16-2011 |
20110176889 | CONCRETE AND MASONRY SCREW ANCHOR - A screw anchor includes a body having a head end that extends to a tip end through an intermediate portion defining an axis of the screw anchor, and a plurality of threads extending along the intermediate portion. Each of the plurality of threads includes a head side surface having a first angle relative to an axis perpendicular to the axis of the screw, and a tip side surface having a second angle relative to the axis perpendicular to the axis of the screw. The first angle is between about 30° and about 40°, and the second angle is between about 15° and about 25°. | 07-21-2011 |
20110217144 | FASTENER FOR FLEXIBLE ELEMENT COUPLINGS - A fastener comprising a head; a first section extending from the head and defining a first outside diameter, wherein the first section is unthreaded; and a second section co-axially extending from the first section and defining a second outside diameter. The second section being threaded and the second outside diameter being smaller than the first outside diameter. | 09-08-2011 |
20120014764 | CONTAMINANT-REJECTING SCREW THREADS - A threaded connection ( | 01-19-2012 |
20120063866 | FIBER REINFORCED PLASTIC BOLT AND METHOD FOR PRODUCING THE SAME - A fiber reinforced plastic bolt(FRP) and a method for producing the same are disclosed. The FRP bolt is useful in the industrial areas which require a bolt having electric-insulation, anti-corrosive, thermal-insulation, and non-magnetic properties. The method for producing the FRP bolt includes the steps of: winding a prepreg around a surface of an internal body, wherein the internal body includes a first reinforcing fiber which is unidirectionally aligned along the axis of the bolt, and a synthetic resin which is impregnated into the first reinforcing fiber, and the prepreg includes a second reinforcing fiber and a thermosetting resin which is impregnated into the second reinforcing fiber; forming a fiber reinforced plastic round bar by heat-hardening the prepreg; and forming a screw thread on the surface of the fiber reinforced plastic round bar. | 03-15-2012 |
20120070249 | Chrome-Plated Fastener With Organic Coating - An organic-coated, chrome-plated fastener includes a fastener body having one or more friction regions that are adapted to slidably engage another structure when the fastener is used for fastening. Some or all of the fastener body may be chrome-plated, including at least one of the friction regions. The at least one chrome-plated friction region may be coated with an organic composition that is selected to control a coefficient of friction of the at least one chrome-plated friction region. | 03-22-2012 |
20120195712 | FASTENER - A fastener includes a threaded surface having an effective diameter. The effective diameter of the threaded surface changes along a first segment of the threaded surface. In addition, the effective diameter of the threaded surface changes along a second segment opposed to the first segment, and the change in the effective diameter of the threaded surface along the first segment is greater than the change in the effective diameter of the threaded surface along the second segment. | 08-02-2012 |
20120195713 | FASTENING MEMBER WITH EXTERNAL THREADS AND THREADED FASTENING ASSEMBLY - The invention discloses a fastening member with external threads, which is capable of mating with a fastening member with internal threads via the external threads and the internal threads; each external thread includes a leading flank and a trailing flank; the external thread further includes an oblique surface extending between the leading flank of the external thread and the trailing flank of the external thread; a joint between the oblique surface of the external thread and the leading flank of the external thread is farther away from an axis the external thread, compared with a joint between the oblique surface of the external thread and the trailing flank of the external thread; the oblique surface of the external thread is attached against the oblique surface of the internal thread. The invention also provides a threaded fastening assembly. The external thread of the invention mates with the self-locking internal thread structure, such that “thread stripping” does not tend to occur between the surfaces in contact of the external thread and the internal thread, whereby the axial force of the external thread may be kept when the fastening member is used, and then the clamping force of the fastening member with the internal threads may be kept. | 08-02-2012 |
20120201629 | FASTENER FOR ATTACHING A MILLING CUTTER BODY TO AN ADAPTOR AND METHOD OF INSTALLING SAME - A fastener for attaching a milling cutter body to an adaptor includes a head portion, a body portion and an undercut disposed between the head portion and the body portion. The head portion has a diameter greater than a diameter of the undercut and a thread root diameter. The diameter of the undercut is equal to or less than the thread root diameter to allow the fastener to freely rotate when the fastener is threaded completely through the milling cutter body. Once threaded completely threaded the milling cutter body, the fastener is threaded into the adaptor to securely attached the milling cutter body to the adaptor. | 08-09-2012 |
20130004262 | SCREW METHOD FOR FORMING A SCREW THREAD - In the case of a screw having at least one thread ( | 01-03-2013 |
20130022427 | METALLIC GLASS FASTENING SCREW - A metallic glass fastening screw that is not susceptible to loosening, and is capable of implementing fastening with high strength and reliability. In processing a screw thread and a screw groove of a screw, amorphous bulk metallic glass is form-rolled at glass transition temperature or less of the bulk metallic glass serving as a member to be processed. The bulk metallic glass has a plastic strain property introduced by plastic working such as form rolling, to improve ductility. A relationship of d>0.022×D is set so that a depth from a bottom of the screw groove in the region where the plastic strain is introduced is d and an outside diameter of the screw is D, to relax stress concentration of tensile stress generated in a region at the bottom of the screw groove due to tension (axial force) applied to the screw in fastening. | 01-24-2013 |
20130129448 | Threaded fastener having a thread crest greater than its thread root and "V" angles on the crest and root - An interlocking thread with a tooth-cross-section that is wider at its crest than at its root and with “V” angles located both along the crest and the root which tightens into a tapped hole that has a similar thread cross-section. | 05-23-2013 |
20140079510 | EARTH BOLT - An earth bolt is capable of achieving electrical connection and watertight sealing and of holding fragment of a coating so that the fragments of coating may not be scattered. The earth bolt can be electrically connected to a member coated with an insulating film. The earth bolt has a head and a threaded body. The head is provided on its bearing surface with an annular ridge protruding from the bearing surface of the head so as to coaxially surround the threaded body and capable of scraping off the insulating film. | 03-20-2014 |
20140105705 | TAPPING SCREW - Disclosed herein is a tapping screw ( | 04-17-2014 |
20140193222 | SCREW - The invention relates to a self-tapping screw ( | 07-10-2014 |
20140234052 | Hybrid Fastener and Method of Making the Same - A hybrid fastener comprises a composite body having a tip, and a metal sleeve surrounding and locked to the tip. | 08-21-2014 |
20140286728 | FASTENER WITH PROLATE CROSS-SECTION - A fastener includes a shank having a point at a first end and a second, head end. One or more prolate cross-section regions is formed in the shank. Prolate cross-section regions may be formed in a threaded section and/or a thread free section of the fastener. Each prolate cross-section may have a polar diameter greater than the cylindrical diameter of the region in which it is formed and an equitorial diameter smaller than the corresponding cylindrical diameter of the region in which it is formed. Two generally adjacent prolate cross-section regions have cross-sections offset with respect to each other by an angle between zero and ninety-degrees. | 09-25-2014 |
20140356099 | THREAD LOAD DISTRIBUTION - A fastener arrangement has first and second threaded members. The fastener arrangement includes the first threaded member having threads that extend from a first end to a second end. The threads have a thread contour that is provided by load and clearance flank surfaces that are joined to one another by crests and roots. The crest provides a crest diameter. A root provides a root diameter and is arranged between adjoining threads. At least one thread near the first end has a weakened thread contour that decreases rigidity of the one thread compared to other threads. The threads extend along an axis. The crest diameter of the second threaded member varies and lies along crest angle relative to the axis and comprises a second threaded member that has load flank surfaces that are engaging the load flank surfaces of the first threaded member at thread contact interfaces. The thread contact interfaces are smaller towards the second end than thread contact interfaces toward the first end. | 12-04-2014 |
20150023761 | HIGH PERFORMANCE THREAD ROLLING SCREW/BOLT FOR USE IN AN UNTHREADED NUT ANCHOR - The present invention provides a screw/bolt thread profile geometry that is particularly suited to forming a mating nut thread when the screw is inserted in to a plain diameter hole, in the anchor and rotated in a manner by which the thread helix angle will cause the relative axial forward movement, of the screw/bolt, into the anchor. This rotation and relative axial movement will be the prime mover in developing the nut thread that has mating contact with the screw/bolt thread. | 01-22-2015 |
20150050101 | ANTI-SPLIT WOOD SCREW - An anti-split wood screw includes a screw head and a shank. The shank has a tip portion connected to a distal end thereof, a first thread extended helically from the front end of the tip portion toward the distal end of the shank, a second thread extended helically from the distal end of the first thread toward the shank, and a third thread extended helically from the distal end of the second thread toward the middle of the shank. The second thread has a plurality of serrated cutting edges and teeth peaks that are alternately disposed. The anti-split wood screw thus formed can tap an object through the first thread, cut off the chips generated during tapping through the second thread, and channel out the chips through the third thread without being clogged by the chips, hence can avoid the object from splitting and damaging. | 02-19-2015 |
20150050102 | Anti-Loose Screw and a Die Device for Forming Same - An anti-loose screw ( | 02-19-2015 |
20150093213 | ANTI-BURR FASTENER - A fastener includes a cylindrical shaft located between a head and a tapered point, threads integrally extending from the shaft and extending along a portion of a length thereof, and a burr cutoff area near the tapered point and including flank surfaces therein forming an angle greater than 90° therebetween. A flattened area can be located between the flank surfaces. | 04-02-2015 |
20150337885 | MODIFIED SHANK FASTENERS FOR ELECTROMAGNETIC EFFECT (EME) TECHNOLOGY - A fastener system for composite structure providing electromagnetic energy protection has a shank with a threaded portion on a first end of the shank terminating in a lead-in portion. A head is present on a second end of the shank. The shank is adapted for intimate conductive contact with an inner surface of an interference fit hole. | 11-26-2015 |
20160115989 | SCREW - The invention relates to a screw, in particular a wood screw (HS), comprising a cylindrical screw shank ( | 04-28-2016 |
20160123370 | THREADED SLEEVE - The invention relates to a threaded sleeve for screwing into a receiving opening of a workpiece, with a core and a thread mounted outside on the core, wherein the thread has three thread turns, wherein the thread turns have a thread profile, wherein the thread profile has a flank angle of 25° to 35°, wherein with an outer diameter of 8 mm to 14 mm the pitch of the thread is in the range of 0.5 to 1.0 times the outer diameter of the threaded sleeve and with an outer diameter greater than 14 mm to 40 mm, pitch of the thread is in the range of 0.25 to 0.65 times the outer diameter of the threaded sleeve, and wherein the thread depth of the thread profile is in the range of 0.03 times to 0.15 times the outer diameter of the threaded sleeve. | 05-05-2016 |
20160377107 | PROCESS FOR PRODUCING A CONNECTING ELEMENT AS WELL AS CONNECTING ELEMENT - In a method for producing a connecting element, in particular a bolt, a zinc anti-friction coating is applied to a blank made of a metallic base material. Subsequently, the coated blank is deformed in a deformation process to a desired final geometry of the bolt. The deformation process may, in particular, be a thread rolling process. The anti-friction coating is applied in particular by way of a zinc diffusion method. The bolt is in particular an engine bolt, specifically a connecting rod bolt. A bolt of this type has a durability as conventional bolts, but at the same time can be mounted repeatedly by virtue of the formation of the special anti-friction coating without the coefficients of friction increasing above permissible limits. | 12-29-2016 |