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 |
| 7850409 | Fastening element A fastening element has a shaft (12), and a tapping thread (21) carried by the shaft (12) and having at least one screw thread (22, 42) a section (23; 43) of which that adjoins the thread pilot (35), having a plurality of fo... | 12/14/2010 |
| 7377019 | Method and apparatus for fastening together structural components A method and apparatus for fastening a first relatively soft structural component such as a wood panel to a second relatively hard structural component such as a steel angle iron using fasteners each having a forward self-drilling portion, a rearward, self-tapping p... | 05/27/2008 |
| 7290972 | Screw anchor for friable material A screw anchor includes a roughly cylindrical body (1) with a drilling portion (3) provided, at its free end, with drilling teeth (14-16), at the other end of the body, a bearing flange (5) and an external screw thread (7). ... | 11/06/2007 |
| 7237994 | Wall plug A wall plug for enabling fixings to be attached to a wall, the wall plug comprising an elongate body having an inner insertion end and an outer end, a through bore extending from the outer end toward the inner end, the through bore being adapted to axially receive a... | 07/03/2007 |
| 7214019 | Self-tapping screw A self-tapping screw having a boring part and a threaded shaft for fixing a panel-type object to a preferably metallic substructure is provided. The screw is configured in such a way that it produces a through hole in the panel type object, said hole accommodating t... | 05/08/2007 |
| 7101133 | Thread-forming screw fastener The invention relates to a screw fastener comprising a threaded shank having a force application means for torque transmission and a screw fastener point. The threaded shank consists of a shank core and a self-tapping thread, and the thread is designed as a prominen... | 09/05/2006 |
| 7063491 | Reverse barb system for screws and nails The reverse barb system for screws and nails includes fasteners that are barbed to prevent backing out once driven into a workpiece or construction material, such as wood. A screw with barbed threads has several barbed thread sections. Each barbed thread section is ... | 06/20/2006 |
| 7025551 | Fastener clip for use in supplying fasteners to a fastener driving tool A clip of fasteners for use in attaching a structural panel to a metal substrate comprises a plastic strip with openings characterized by inwardly-extending ribs for gripping and supporting fasteners that comprise a forward self-drilling portion, a rearward self-tap... | 04/11/2006 |
| 6923611 | Self-drilling fastener A self-drilling fastener for attaching wood substrates to metal substrates comprises an elongate shank defining an axis, the shank having a first end and a second end. A drilling tip having a drill point and an axial length is formed at the first end. A broad head i... | 08/02/2005 |
| 6910836 | Impact driver for rotary tools Method and apparatus for improving the efficiency of the rotating cutter of a tool by converting at least part of the rotational torque applied to the cutter to repeated rotational impact forces. ... | 06/28/2005 |
| 6402448 | Self-drilling and self-tapping screw The present invention relates to a self-drilling and thread-forming connecting element, a screw, having a threaded shank and a drilling point at the end for the chip-forming drilling of a core hole for the threaded shank. The drilling point is designed as... | 06/11/2002 |
| 6309159 | Self drilling roof bolt An elongate roof bolt includes a bolt body having an axially extending central bore and defining a leading end. The leading end includes a pair of axially extending abutment elements formed by machining. Each abutment element includes an abutment face for... | 10/30/2001 |
| 6186716 | Anchor bolt An anchor bolt is provided which includes a head, a drill portion, and an intermediate shank portion. The intermediate shank portion has a longitudinal cavity formed therein for receiving a mounting set screw. An external thread is formed on the shank por... | 02/13/2001 |
| 6079921 | Anchor bolt for friable material The anchor bolt comprises a generally hollow body (1) with a drilling end (4), a supporting collar (5) at the other end and an external screw thread (6). The collar (5) forms two openings (10, 11), diametrically opposed, for receiving an anti-rotation pin... | 06/27/2000 |
| 6004085 | Self-drilling anchor A self-drilling anchor having a self-drilling function includes a body and a pin. The body includes a head and a shank extending from the head downward. The head is of a shape similar to the head of a hexagonal bolt such that the head may engage with the ... | 12/21/1999 |
| 5987837 | Reamer screw and building panels erected with reamer screws A reamer screw having an elongated shank, with a leading end and a trailing end, at opposite ends, and having a self-tapping/cutting threaded portion at the leading end adapted for self-tapping and cutting an opening through a workpiece, and driving secur... | 11/23/1999 |
| 5947670 | Self-drilling fastener A self-drilling fastener includes an elongated shank region having first and second ends, a head at the first end and a drill point at the second end. Included in the shank region is a root having helical threads extending therefrom with a predetermined t... | 09/07/1999 |
| 5630688 | Self-tapping sleeve A self-tapping sleeve for providing a ceiling junction for a suspended lighting fixture has a cylindrical body, a center passageway for containing the junction, a thread structure on the perimeter surface of the cylindrical body, and two perimeter cutting... | 05/20/1997 |
| 5625994 | Self-drilling anchor A self-drilling anchor installable in a wall by means of a screwdriver, the anchor being adapted to receive a threaded fastener serving to hold a fixture against the wall. The anchor includes an externally-threaded shank section having a head engageable b... | 05/06/1997 |
| 5558479 | Wall anchor accommodating fasteners of varying thread diameters A wall anchor uses splines on an interior surface of a cylindrical body to accommodate fasteners having different thread diameters. The splines are configured in types. A first type includes at least one spline protruding centrally at a narrow angle, whil... | 09/24/1996 |
| 5529449 | Saw tipped anchor insert An anchor for insertion in wall board and having a cylindrical body with an outer thread and an axial passage and a flanged proximal end and a saw-tipped distal end. The flange at the proximal end may be formed as a hook and the saw-tipped end is provided... | 06/25/1996 |
| 5449257 | Self drilling anchor A self-drilling anchor installable in a wall by means of a screwdriver, the anchor being adapted to receive a fastener serving to hold a fixture adjacent the wall. The anchor includes an externally-threaded shank section having a head engageable by the sc... | 09/12/1995 |
| 5308203 | Saw tipped anchor insert A wall anchor for insertion in wall board and having a cylindrical body with an outer thread and an axial through passage extending from a flanged proximal end to a saw-tipped distal end. The cylindrical body comprises a proximal extension and a distal ex... | 05/03/1994 |
| 5267423 | Self-drilling anchor and bearing plate assembly A self-drilling anchor and bearing plate assembly adapted to secure a membrane or other layer onto a roof deck or a similar substrate formed of a material that requires a drilled hole to receive the anchor. The bearing plate which rests on the layer and i... | 12/07/1993 |
| 5234299 | Self-drilling anchor A self-drilling anchor installable in a wall by means of a screwdriver, the anchor being adapted to receive a threaded fastener serving to hold a fixture against the wall. The anchor includes an externally-threaded shank section having a head engageable b... | 08/10/1993 |
| 5190425 | Anchor A self-drilling anchor for insertion into a workpiece such as a drywall to secure an element to the workpiece comprises a drilling portion having substantially parallelo-gram configured blade means for drilling a bore of pre-determined diameter into the w... | 03/02/1993 |
| 5098435 | Cannula A bone stabilizing system including an improved guide pin consisting of an elongate solid shaft having one or more drilling teeth and self-tapping threads at a first end and a cross-section partially defined by a non-circular circumference. The system als... | 03/24/1992 |
| 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 |
| 4538947 | Set screw A set screw having a cutting element provided on the outer end thereof for a "biting" engagement with the outer periphery of a pipe, or the like, the cutting element comprising a cutting edge adapted for a penetration of the pipe in a manner requiring min... | 09/03/1985 |
