Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7363783 | Rod and reel support with electronic marker device An electronic marker device affixes a fishing rod to a fishing reel. The device includes a marker housing having a base and a cover to enclose the moveable socket of a fishing rod thereby preventing removal of the fishing reel from the fishing rod. The marker housin... | 04/29/2008 |
| 7179036 | Fastening arrangement employing thread-forming screw A fastening arrangement comprising a thread-forming lobular screw and a member defining a non-tapped pilot hole therein. The screw has a shaft and a head joined to a proximal end of the shaft, the shaft defining a plurality N of lobes circumferentially spaced about ... | 02/20/2007 |
| 7156600 | Die for, method of making, and fastener with lobed primary thread lead and interposed dual auxiliary thread lead with improved substrate entry end portion A threaded fastener comprises a first, primary thread lead, and a pair of second, auxiliary thread leads alternatively interposed between successive threads of the first, primary thread lead, except within the vicinity of the tip portion of the fastener so as to def... | 01/02/2007 |
| 7101134 | Fastener having multiple lobed thread A threaded fastener includes a lead having bosses separated from one another by bases along the thread crest. The lead-in and lead-out profiles of the bosses, and other features of the bosses and bases may differ from one another along the fastener shank. The lead-i... | 09/05/2006 |
| 7021877 | Self-tapping screw The invention relates to a self-tapping screw, whose threads, in a rear area (facing the head), have a substantially cylindrical external diameter and, in a front area (facing away from the head), extend with an external diameter which decreases towards the end of t... | 04/04/2006 |
| 6956181 | Method for making a fastener In accordance with one embodiment, the present technique provides a method for making a threaded fastener. The method includes that act of forming a die-making tool having surface features that correspond to the desired crest and flank profiles of a thread of the th... | 10/18/2005 |
| 6899500 | Fastner having multiple-bossed lead A threaded fastener includes a lead having bosses separated from one another by bases along the thread crest. Two such leads may be formed such that lead-in profiles for of one lead are disposed at locations corresponding to locations of lead-out profiles for the ot... | 05/31/2005 |
| 6810956 | Thread coupling for a drill string for percussive rock drilling A thread coupling for a drill string for percussive drilling has a male thread (5) and a cooperating female thread (4). The male thread is arranged on a first drill string element (3) having a first impact surface (6). The female thread i... | 11/02/2004 |
| 6811552 | Device for securing bits of bone together Device for securing bits of bone together, particularly small-sized bats of bone, for example bits of metatarsal head, in the form of a spindle including an elongate shank (1) followed, after a breakable region (2), by a fixator element (3) exte... | 11/02/2004 |
| 6722832 | Assembly unit including a component and at least one thread forming screw An assembly unit includes a component including at least one through hole and at least one screw. The screw is associated with the through hole of the component. The screw is designed and arranged to produce a thread. The screw includes a head and a supporting surfa... | 04/20/2004 |
| 6494656 | Self-tapping screw, blank and method for joining thin workpieces and production method for the same A headed multi-lobed blank, method of manufacturing a self-tapping screw from the blank, and resulting multi-lobed self-tapping screw for joining thin workpieces provides desirable thread-forming characteristics at the conical tip and body portions, and i... | 12/17/2002 |
| 6375401 | Fastener shank crossection utilizing non-circular constant breadth curves A fastener includes a head and a threaded shank. The shank defines an inner periphery and the thread defines an outer periphery. The shank and the thread each have a generally polygonal crossection with at least five lobes separated by at least five conve... | 04/23/2002 |
| 6340277 | Self-tapping screw Self-tapping screw having an at least partially non-round enveloping curve for the thread and having a penetrating section and a retaining section, it being the case that the penetrating section contains a plurality of successive thread stages which each ... | 01/22/2002 |
| 6261040 | Self-tapping fastener A self-tapping fastener is provided. The fastener is formed from a blank having an odd number of lobes along a cross section taken perpendicular to its axis of rotation. The lobes define a relatively high out-of-round cross section along a tapered thread-... | 07/17/2001 |
| 6089806 | Blank for self-tapping fastener A blank for a self tapping fastener, and corresponding fastener is provided. The blank defines an odd number of lobes along a cross section taken perpendicular to its axis of rotation. The lobes define a relatively high out-of-round cross section along a ... | 07/18/2000 |
| 6004167 | Terminal block This invention provides a terminal block capable of effectively preventing a screw in a clamping portion from being loosened. It has a block body (4), and a clamping member (10) adapted to clamp an object so as to be pressed against a clamping surface (4c... | 12/21/1999 |
| 5964560 | Screw fastener A threaded fastener for securing a first material to a support member is provided comprising a tapping or tap screw point at a first end, a threaded shank with three separate leads, a first portion of the shank, adjacent to the tap screw point, being of a... | 10/12/1999 |
| 5961267 | Thread forming fastener The present invention envisions a fastener and a blank for forming a fastener. Threads are formed on the fastener blank of the present invention to achieve the fastener of the present invention. The fastener and blank include a shank which defines a centr... | 10/05/1999 |
| 5921735 | Lobular fastener with rectilinear pitch profile A fastener is constructed having four thread zones constructed over the length of the fastener, from the head to the tip, namely a ridged cylindrical holding zone, a ridged cylindrical transition thread forming zone, a rectilobular tapered thread forming ... | 07/13/1999 |
| 5772374 | Tapping screw and mechanism of engaging member to be engaged using the same A tapping screw engages a member to be engaged with a base plate made of metal by tapping a burring hole formed on the base plate. The tapping screw includes a main body having a shank and a head formed at a base end of the shank. A reduced diameter shank... | 06/30/1998 |
| 5395195 | Thread-forming screw with tri-roundular, tapered end A thread-forming screw includes a tapered end portion having a tri-roundular cross section with three spaced flats and three threaded, round portions disposed in an alternating manner about the screw's periphery. The screw is formed by inserting a tapered... | 03/07/1995 |
| 5385439 | Radial extrusion thread-forming screw A radial extrusion thread-forming screw (20) comprises a lead thread (36), load-bearing threads (34), and a forming thread (38). The forming thread (38) has a plurality of forming elements (50) that extend outwardly from the forming thread and which are s... | 01/31/1995 |
| 5244327 | Trailer bed fastener The present invention discloses a fastener for a trailer bed. The trailer bed is constructed of wooden planks placed on a metal frame. The screw has twin threads with a helix angle of substantially 10° to a line perpendicular to the axis of the shank or ... | 09/14/1993 |
| 5242253 | Thread-forming screw A thread-forming screw includes a tapered end portion formed by inserting a cylindrical blank between paired dies each having a straight portion and a tapered portion. The threads of each die are provided with undulations along their lengths corresponding... | 09/07/1993 |
| 5141376 | Self drilling screw A self drilling screw for thin metal applications. The screw has a small point for drilling a hole in the thin metal and a substantially larger diameter non-tapered threaded section. Between these portions is an extended length taper having a plurality of... | 08/25/1992 |
| 5044855 | Thread-forming fasteners This invention relates to an improvement of thread-forming fasteners comprising driving heads, shanks, work entering end portions without a thread and continuous rolled type threads on both the said shank and the said work entering end portions, the shank... | 09/03/1991 |
| 4973209 | Screw for contaminated pre-tapped holes A locking screw having a head at one end, a special entry portion at the other end, and a trilobular shank portion extending from the entry portion toward the head. The screw is further characterized in that the thread profile is of a double angle configu... | 11/27/1990 |
| 4963064 | Fabric fastener A fabric fastener adapted for fastening a fabric to a framework, or a workpiece to a fabric covered framework, comprises a head and shank, and a sharp edged tip section. The tip section has an unthreaded angle side which intersects a threaded side to form... | 10/16/1990 |
| 4820098 | Screw The screw is provided with a three-lobed thread crest, followed by a threaded portion with a three-lobed thread geometry, which passes into a threaded portion with a circular thread geometry. In all three threaded portions the flank angle of the thread is... | 04/11/1989 |
| 4818165 | Threaded element for use as an insert A threaded element for forming a threaded profile in the wall of a bore formed in a material and for insertion into the bore so as to reinforce the bore. The threaded element includes a cylindrical stem having an external thread having a plurality of sepa... | 04/04/1989 |
| 4790703 | Prevailing torque fastener assembly A tri-lobular section of a bolt receives a mating tri-lobular bore of a washer to prevent the washer from rotating. Roll formed male threads on the tri-lobular section of the bolt receive a cooperating nut. The nut has a base shaped for wrench engagement,... | 12/13/1988 |
| 4534690 | Assymetrically shaped thread forming screw and method of making same A thread forming screw made from a blank which has a tip with an assymetrical cross-section comprised of two oppositely disposed inner surfaces which gradually merge with two oppositely disposed outer surfaces. The inner surfaces may be arcuate or general... | 08/13/1985 |
| 4486135 | Tapping screw A tapping screw in which a shank includes a main shank portion having a substantially uniform diameter and a reduced diameter shank portion having a substantially rounded triangle shaped cross-section. Tapping is carried out by the apexes of the rounded t... | 12/04/1984 |
| 4430036 | Thread forming fastener A self-threading fastener has circumferentially spaced thread-forming lobes on its thread and with the thread depth at a maximum at the lobes and a minimum circumferentially between the lobes. A lobe in one turn is circumferentially offset from a lobe in ... | 02/07/1984 |
| 4323326 | Self-drilling screw A self-drilling screw having a single screw thread or a plurality of screw threads of the same angle and height, wherein at least one cutting edge of a drill shape is formed by form rolling at an end face of a forward end of the screw thread at a tapering... | 04/06/1982 |
| 4315340 | Method and apparatus for making a self-thread creating fastener A thread forming screw having a helical thread and a tapered lead-in section with a polygonal cross section is formed from a conventional blank by rolling the blank between a pair of thread rolling dies having means thereon to form alternating convex lobe... | 02/16/1982 |
| 4261402 | Captive thread forming terminal screw A self-tapping, self-captivating fastener is provided for engagement in a predrilled aperture to enable the connection of an electrically conductive element such as a lead wire, or spade type terminal attached to the end of such a wire, to a workpiece or ... | 04/14/1981 |
| 4260005 | Self-locking fastener, fastener system, and process A collar threads onto a shear pin. When the collar engages a surface of a workpiece, resistance to further threading increases. When sufficient resistance to threading occurs, a setting driver upsets lobes of the collar and forces these lobes radially inw... | 04/07/1981 |
| 4170050 | Method of making lobular internally and externally threaded insert The present invention relates to an improved method for economically manufacturing lobular internally and externally threaded self-tapping inserts. The method is characterized by the novel application of a conventional roll forming apparatus of the type i... | 10/09/1979 |
| 4112812 | Heat-treated article An article is hardened or tempered in a localized zone. Where the article is a thread-forming device the zone is that part of its thread that does the thread-forming in the workpiece. The hardness of the remainder of the body of the article is left unchan... | 09/12/1978 |
