Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7963732 | Threaded fastener A fastener is provided including an elongated body having a first end and a second end, and a helical thread formed on at least a portion of the elongated body where the thread has a crest, a root, and flank portions. The helical thread has at least one protrusion e... | 06/21/2011 |
| 7798755 | 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 se... | 09/21/2010 |
| 7338286 | Dental implant system An implant comprising two internal anti-rotational features. One anti-rotational feature is adapted to engage a driving tool, while the other anti-rotational feature is adapted to engage an abutment. An implant abutment system is provided with an angled abutment ada... | 03/04/2008 |
| 7334975 | Fastener assembly The present invention relates to a stud including, a head having a torque transferring structure and an underside wherein the underside includes a plurality of protrusions; a shaft having a trilobular shape comprising a plurality of shaft elements having at least on... | 02/26/2008 |
| 7326014 | Interactive fit screw thread A threaded fastener includes a curved-line path thread provided in a helical pattern along a shank of the fastener. The curved-line path can be provided on either side of the standard straight-line path or on opposite sides of the straight-line path. The curved-line... | 02/05/2008 |
| 7320626 | Transformer stud connector with improved conductivity using a special thread profile A connector for attachment to an extending transformer stud. The connector includes an elongate central body having a central aperture and an opening at one end for insertable accommodation of the transformer stud. The central aperture accepts a single or more than ... | 01/22/2008 |
| 7275903 | Light weight fastener for use on interference fits in automation A fastener for installation into an interference fit hole within a structure. The fastener may be installed through automated installation methods. The fastener includes an enlarged protruding head at a proximal end of the fastener. Distal the head is a substantiall... | 10/02/2007 |
| 7246979 | Multi-pitch screw, multi-pitch nut, feed screw device using the screw and nut, and method of producing the nut A flat portion 12a and a slope portion 12b are provided on a thread 12 of a multi-pitch screw 10 alternately. The flat portion and the slope portion are provided on the thread of a multi-pitch nut which fastens with this. Co... | 07/24/2007 |
| 7235078 | Protective devices for use with angled interference screws A protective device for use with an interference screw used to attach a soft tissue graft within a bone tunnel reduces the tendency of the interference screw to undesirably snag a soft tissue graft and/or sutures when screwed into a bone tunnel. The protective devic... | 06/26/2007 |
| 7214020 | Looseness resisting screw and stud hole A looseness resisting screw formed with an external thread includes a first thread area having a substantially uniform outer diameter and a second thread area extended from the first thread area toward a leading end of the screw. The second thread area has a plurali... | 05/08/2007 |
| 7163366 | Screw with two types of threads A screw includes a first thread on the shank and located close to the point of the shank, and a second thread which is connected to the first thread and extends toward the head of the screw. Each of the first and second threads includes an upper flank and a lower fl... | 01/16/2007 |
| 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 |
| 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 |
| 7014403 | Finish screw fastener A fastener including a head having a screw driver or wrench engagement feature. The fastener includes a threaded shank extending from the head. A plurality of voids or scores in the shank spaced from but near the head permit rotational torque on the head in one dire... | 03/21/2006 |
| 6989014 | Orthopedic screw and method A screw, driving device, and method are provided for repairing a tissue injury of a patient, such as a meniscal tear in a knee or osteochondritis dissecans. The screw has a root, a distal section having a narrowing cross section toward the distal end, and a thread a... | 01/24/2006 |
| 6976818 | Threaded fastener particularly suited for plastics A male threaded fastener particularly suited for use in plastics has a high thread and a low thread. Depressions are provided in the pressure flank of the high thread. Dimensional relationships are defined for scaling the fastener to commonly accepted sizes. ... | 12/20/2005 |
| 6974289 | Pressure flank screw and fastening system therewith A male threaded fastening member is provided with depressions in at least one or several helix wraps of the thread adjacent the head, the depressions extending inwardly from an edge of the thread at least part way toward a shank of the male fastening member. In a fa... | 12/13/2005 |
| 6863483 | Screw provided with self-locking thread Screw provided with self-locking rolled thread, wherein, in a plurality of places along its extent, the thread is deformed in relation to the normal thread cross section in that the thread outside diameter is reduced by radial compression of limited thread portions,... | 03/08/2005 |
| 6676352 | Fasteners with improved retaining effect A fastener includes a main body having a number of spaced ridges formed on an outer periphery thereof. The ridges are arranged along a helix. At least one of the ridges has a retainer extending in a direction that is at an angle with an extending directio... | 01/13/2004 |
| 6669424 | Screwed connection, fastener for said connection and method for the production thereof A screwed connection has a first connecting means with an external thread and a second connecting means with an internal thread. In order to avoid self-slackening of the screwed connection, the external thread has a denticulation (14-16) which interacts w... | 12/30/2003 |
| 6619888 | Flange nut for mine roof bolt A method and apparatus for making a nut having a first end, a second end, and defining an orifice extending between the first end and the second end. A plurality of first threads are positioned in the orifice defined by the nut body, and a malformed threa... | 09/16/2003 |
| 6527777 | Device for repairing a soft-tissue tear and method A fastener, driving device, and method are provided for repairing a tear in soft tissue of a patient, such as a meniscal tear in a knee. The fastener has a distal section having a narrowing cross section toward the distal end and a helical protrusion alon... | 03/04/2003 |
| 6464439 | Low tolerance threaded fastener A threaded member such as a bolt, nut, or pipe has a threaded portion on a body of the member. The threaded portion of the member includes a first threaded section, a second threaded section, and a third threaded section. The first and third threaded sect... | 10/15/2002 |
| 6454315 | Oil well pipe screw joint, and threading method and apparatus therefor An oil-country-tubular threaded joint can withstand tensile forces, and in addition, other forces such as compression and bending forces, thus producing highly improved characteristics in regard to the prevention of fluid leakage. The oil-country-tubular ... | 09/24/2002 |
| 6386927 | Screw fastening structure and nut member A conductive male thread (22) has a thrust bearing flank (22a) coated with an insulating paint layer (23), and a conductive female thread (12) has a thrust bearing flank (12a) formed with a conductive projection (13) to break through the paint layer (23) ... | 05/14/2002 |
| 6349466 | Ready to wire terminal assembly with vibration resistant clamping screws A method of preventing vibration loosening of a clamping screw 26 of a circuit protection apparatus 10 is provided. The circuit protection apparatus 10 has a conductor receiving member 28 including a conductor receiving opening 40 for receiving an electri... | 02/26/2002 |
| 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 |
| 6321861 | Auger An auger is produced from a material such as plastic. The auger includes a shaft with a first pointed end having a thread member thereon. A second end of the auger includes an opening. Handles extend perpendicularly from the shaft and near the opening. Th... | 11/27/2001 |
| 6254327 | Screw with spiral triangular threads A screw comprising a shank having an upper portion formed with spiral circular threads and a lower portion formed with spiral triangular threads, each of said spiral triangular threads having three sharp edges and three pointed tips, said pointed tips of ... | 07/03/2001 |
| 6190101 | Low tolerance threaded fastener A threaded fastener is having a raised area or bump on a thread flank. The flank can be positioned on the nut thread or on the bolt thread. The bump forces the mating threads at least on one flank to have near zero tolerances along the pitchline of the th... | 02/20/2001 |
| 5944465 | Low tolerance threaded fastener A threaded fastener is having a raised area or bump on a thread flank. The flank can be positioned on the nut thread or on the bolt thread. The bump forces the mating threads at least on one flank to have near zero tolerances along the pitchline of the th... | 08/31/1999 |
| 5868536 | Male screw and method for manufacturing same A male screw which has a protrusion protruding from a thread thereof at least with regard to the normal direction to a flank of the thread. To obtain such male screw, a blank is introduced between rolling dies which are moved relative to one another and i... | 02/09/1999 |
| 5538380 | Metallic nut for use with ceramic threads A nozzle guide vane assembly has ceramic components therein having a conventional thread thereon including a preestablished pitch and having a preestablished rate of thermal expansion. The nozzle guide vane assembly has a metallic components therein havin... | 07/23/1996 |
| 5492442 | Bone screw with improved threads A bone screw having a helical thread with a constant outside diameter and curling around a tapered core. The fine screw tip and thread at the tip of the screw can be inserted into a bone with minimal tearing or cracking of the bone. The thicker core just ... | 02/20/1996 |
| 5403136 | Threaded fastener especially for orthopaedic purposes The fastener, which is especially adapted for bones, consists of a shaft (2) bearing a thread (1) with variable pitch, a front end (3) and a rear end (4). The thread (1) is present over the entire area of the shaft (2), and in the area of the rear end (4)... | 04/04/1995 |
| 5340253 | Fastener with thread lock A threaded fastener that self locks as it is tightened to a fastened object. The thread includes one or more portions that are shifted, resulting in one or more discontinuities in the thread. Each shifted portion of thread is fully formed at the discontin... | 08/23/1994 |
| 5282708 | Self-tapping screw-type masonry anchor A self-tapping, screw-type masonry anchor which can readily be turned into a hole drilled in a masonry structure to secure an object thereto, the installed anchor being highly resistant to pull-out forces. The anchor, which is fabricated of hard metal, in... | 02/01/1994 |
| 5188496 | Self-tapping screw-type masonry anchor A self-tapping screw-type masonry anchor which when turned into a hole drilled in a masonry structure to secure an object thereto is then highly resistant to pull-out forces. The anchor is fabricated of a metal whose hardness is such that when it rubs aga... | 02/23/1993 |
| 5176483 | Detachment lock for a bolt connection A threaded connection structure for rotatably connecting and disconnecting adjoining members including a female member having annular internal pitched threads and a male member for threading into the female member having outer threads complemental to the ... | 01/05/1993 |
| 5123793 | Tapered locking nut A locking nut is provided by forming a straight cylindrical bore through a body, forming a tap with uniform teeth, the tips of which taper at a shallow angle toward one end of the tap, and tapping said bore with said tap so as to produce a thread having a... | 06/23/1992 |
