Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7955036 | Washer and threaded assembly provided therewith A washer (14) and a threaded assembly (22) between a screw (30) and a workpiece (42) are provided. The washer (14) is offset up to an angle (α) with respect to a flat initial state, such that the washer has an insert thickness (D | 06/07/2011 |
| 7857566 | Reactive fasteners Several embodiments of reactive biasing fasteners are described. The fasteners are utilized in place of jam nuts and Belleville washers providing for the storage of a pre-load and effectively providing a locking function to prevent unintended loosening of an associa... | 12/28/2010 |
| 7261506 | Washer and threaded fastener assembly incorporating same A washer for a threaded fastener assembly and a threaded fastener assembly incorporating such a washer. The washer includes a body having a central axis including two opposed sides an outer periphery and an inner periphery defining a central aperture extending betwe... | 08/28/2007 |
| 7226259 | Locking fastener assembly A locking fastener assembly comprising a nut and a washer. The nut and washer each have opposed load bearing surfaces which include a series of annularly extending, slightly inclined faces forming shallow undulations around each surface. The load bearing surface on ... | 06/05/2007 |
| 7198445 | Washer with crush zone A conical washer having a crush zone wherein the inner annular projection comprises a top and bottom elevation where the top elevation lies at an approximately 100 to 165 degree angle to the inner annular wall of the washer and the bottom elevation is substantially ... | 04/03/2007 |
| 7192232 | Self-locking fastening device A self-locking fastening device which includes a screw or nut for fastening at least one first part to a second part and a shim (10) which is provided with a central borehole (11). The two surfaces of the shim (10) include rib profiles (12,14... | 03/20/2007 |
| 7156595 | Load indicating fastener insert A method and apparatus for determining fastener axial loading includes a fastener insert having an arched bottom surface, which deflects correlative to the level of axial loading. A load indicating mechanism determines axial loading by measuring the amount of deflec... | 01/02/2007 |
| 7128328 | Mechanical stop for a rigid bar A mechanical stop is adapted to be mounted onto a rigid bar and includes a single piece conically shaped body having a plurality of inwardly extending projections. Each of the inwardly extending projections have a distal end that is contoured to match an outer surfa... | 10/31/2006 |
| 7083372 | Washer and fastening element A washer for a fastening element, having a circumferential flange, having an annular washer body provided with an opening, and having at least one holding web, wherein on the inner face of the opening there are disposed at least two claws, which jut radially into th... | 08/01/2006 |
| 7056074 | Connecting element and joint A connecting element is adapted to be placed between two pieces of wood to be joined and includes a body with two opposite main surfaces and with an engaging device which protrude from each main surface. In addition, a joint comprises a connecting device which is ad... | 06/06/2006 |
| 6971178 | Replaceable blade knife A utility knife includes a handle assembly comprising first and second handle portions pivotally movable between open and closed positions. A blade carriage within the assembly carries a blade. When the handle portions are in the open position the blade carriage is ... | 12/06/2005 |
| 6939097 | Ground washer A ground washer is disclosed for attachment by a grounding screw to a grounding terminal. The washer device includes a disc-shaped member which defines an opening for the reception therethrough of the grounding screw. The member has an annular portion having a first... | 09/06/2005 |
| 6679640 | Printing system web guide coupling assembly A coupling assembly for a printing system that includes a threaded bolt that engages a threaded bore of a first dovetail nut. The assembly also includes a second dovetail nut with a bore through which a shaft of the bolt passes. Each dovetail nut has two ... | 01/20/2004 |
| 6668501 | Stucco fastening system A shear wall system comprises stucco fasteners consisting of an elongated first portion that is driven into a wood frame wall, and an elongated second portion that is completely embedded in a stucco wall panel. In one embodiment, the fasteners consist of ... | 12/30/2003 |
| 6422796 | Insulation fastener disk A flexible disk for securely holding insulation to an air duct made from a resilient material, and having a convex upper surface and a diameter of from 1.5 inches to 4.0 inches. A washer for receiving a disk fastener is centrally positioned in the disk to... | 07/23/2002 |
| 6171039 | Locking mechanism for connector A product and method for preventing a connector from rotating when a mating connector is attached to, or detached from, the connector. When a nut on the connector is tightened, a washer is compressed in a groove in a panel to which the connector is attach... | 01/09/2001 |
| 5904460 | Nut having frustum disc spring and washer for fastening wooden articles A washer based nut has a nut body (11), a frustum disc spring (12) of a countersunk shape and rotatably fitting on the nut body, and a washer (14) for bearing against wooden articles. The washer has a central bore (16) and a round recess (17) formed aroun... | 05/18/1999 |
| 5828008 | Fastener assembly for establishing a mechanical and electrical connection to coated metal An electrically operated device and fastener assembly for establishing an electrical and mechanical connection on the device. The fastener assembly generally includes a fastener and a washer which may be permanently flattened against the device to establi... | 10/27/1998 |
| 5679033 | Capacitor terminal cover assembly A terminal capacitor cover assembly having a screw portion and a jacket portion for complementarily fitting a terminal for a capacitor. This assembly provides an easy retrofit for capacitor terminals to equip them with a aesthetically acceptable and funct... | 10/21/1997 |
| 5415511 | Multipurpose roofing and siding fastener A roofing and siding fastener for securing underlayments, exterior insulation sheathings, and similar membranes to a substrate. The disclosure comprises a cap portion having a rectangular body with oppositely extended legs. Said legs are bent downward and... | 05/16/1995 |
| 5316319 | Liveload assembly for maintaining torque on bolts A liveload assembly having a stack guide with a thread on the exterior side wall, a plurality of compressible belleville washers stacked inside the stack guide, and a retainer cap having a thread on an inner side wall for matingly engaging with the stack ... | 05/31/1994 |
| 5289844 | Clamping assembly for vehicular transmission operating control valves A clamping assembly for securing a transmission operating control valve body to a transmission case. The clamping assembly utilizes at least one biasing member having a hub portion. The hub portion has a generally centrally disposed aperture with a plural... | 03/01/1994 |
| 5282710 | Covering device allowing simplified fastening A covering device comprising a cap of flexible material having at least one recess, that is penetrable by a fastening element. The recess is enclosed by a cup-spring-type area which is formed in one piece with the cap.... | 02/01/1994 |
| 5125827 | Injection molding apparatus having an insulative and resilient spacer member An insulative and resilient spacer member to be mounted between a heated manifold and a cooled clamp plate in an injection molding system. The spacer member has a plurality of V-shaped concentric rings. It has a uniform cross section with a number of web ... | 06/30/1992 |
| 5090854 | Self locking nut A symmetric self locking nut with a deflecting annular flange that allows the nut to be installed from opposite ends. The nut has a shank with a threaded hole through the longitudinal axis of the shank. Extending from the shank perpendicular to the longit... | 02/25/1992 |
| 5056975 | Elastically compressible conical lock washer A washer for use in fastening two members by a bolt is disclosed herein. The washer comprises an elastic body disposed between a head of the bolt and a seat surface corresponding to a surface of one member of the members. The body has a hole to allow for ... | 10/15/1991 |
| 4941787 | Locking mechanism for fastener A bolt shank and washer have contiguous respective elliptical and circular surfaces that interact to impart an undulated axial distortion to the washer in a circumferentially running sinusoidal way, so that the washer acts in spring-like fashion to lock t... | 07/17/1990 |
| 4812098 | Device for joining together building units The present invention relates to a device for joining together building units, comprising a lock housing (2) positioned in one building unit; a peg (3) positioned in the other building unit and arranged to be inserted into the lock housing, the end of the... | 03/14/1989 |
| 4728031 | Apparatus for fastening rails to railroad ties Apparatus for fastening rails on ties of a railroad comprising four rail screws for flushly mounting an abutment face of a bedplate against the upper surface of the tie and a pre-stressed, elastically deformable bedplate having a convex curved abutment fa... | 03/01/1988 |
| 4571133 | Loading washer assembly A loading washer assembly includes an annular first washer provided with spaced apart ears on its outer peripheral edge with each of the ears having a return bent portion at its free end, an annular second washer provided with spaced apart notches on its ... | 02/18/1986 |
| 4376606 | Load-distributing washer for plastic members A specially designed washer for attaching a plastic member to a metal substrate. The washer has a generally polygonal configuration with a metal-substrate-engaging member which projects through the plastic from an off-center location. This member provides... | 03/15/1983 |
| 4317580 | Hitch adapter An improved hitch adapter for connecting an implement to a tractor drawbar including an adapter bar having a hitch member extending rearwardly of the drawbar, a spring locking bar disposed on the adapter bar, and a lower support member having a bolt attac... | 03/02/1982 |
| 4300866 | Self-retaining spring washer A one-piece spring washer for use with threaded fasteners such as screws has a self-retention feature whereby, once positioned on the screw, it remains firmly in place. The washer comprises an annular body defining a central aperture for receiving the scr... | 11/17/1981 |
| 4283091 | Shock proof fastener assembly for vehicle wheels and other applications A shock and vibration-proof fastener of general application and particularly suitable to hold dual wheels demountably assembled to a cargo vehicle hub. The fastener is designed to isolate the threads thereof from radial and torsion stresses utilizing a sp... | 08/11/1981 |
| 4026060 | Lock fastener for a fishing reel A lock fastener for a fishing reel which includes a first member formed with a threaded bore therein and adapted to engage the foot of a fishing reel and hold it in locked position on an associated fishing rod, a second member having a shank dimensioned t... | 05/31/1977 |
