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Class 411/154 - Apertured plate of uniform thickness having undulating contact surfaces


Subclass of Class 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
Definition: Device wherein the open-center figure is in the nature of
No. of patents: 17
Last issue date: 02/19/2008


NumberTitleIssue Date
7331874Method for producing circular washer
Circular washers are formed by the following steps: at least two through holes are provided in the middle of a belt of material, which are also used for positioning and advancing the belt; a residual slot is formed between every two adjacent through holes, thereby f...
02/19/2008
7229061Device for fastening a turbocharger
A device for fastening a turbocharger to a base, with a fastening foot (12) which is integrally formed in one piece on a gas outlet casing (10) of the turbocharger and which has long holes (16) spaced from one another and preferably arranged in ...
06/12/2007
7226259Locking 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
7198445Washer 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
7192234Integral washer and threaded fastener assembly and method for making same
An assembly of a threaded fastener and a stemmed washer is provided, such as for applications in which a standoff is desired between a washer and a mating threaded fastener. The stemmed washer includes a washer portion and a standoff portion extending from the washe...
03/20/2007
7192232Self-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
7171876Wrench combination
A wrench combination includes a handle with an ear defining an aperture and an annular groove around the aperture. A wrench includes an annular head, an ear extending from the annular head and an annular gear put in the annular head. A washer is put in the annular g...
02/06/2007
6361257Parallel wave washer
A parallel wave washer having a body member with an aperture disposed therethrough, a first groove and a first ridge are disposed across a first end of the body member, the first groove is spaced apart from the first ridge and is aligned parallel thereto,...
03/26/2002
6205730Roofing plate for securing roofing membrane
A roofing plate for securing a roofing membrane to a roof includes a top surface, a bottom surface and a generally oblong peripheral edge having two major sides and two minor sides. An opening is located generally centrally on the plate in a central porti...
03/27/2001
5984602Reversible threaded fastener system
A reversible threaded fastener system which provides holding of a nut in a f ully conjoined state with respect to a bolt, yet the interrelationship therebetween is fully reversible and is accomplished without friction and without inelastic deformation. In...
11/16/1999
5102275Deck plate and assembly
A planar stress plate-buttress thread fastener assembly in which the stress plate's annulus has teeth formed on the perimeter thereof and pointed in the direction of the installation rotation of the fastener. The teeth are deflected downward out of the pl...
04/07/1992
5007760Device for aligning and mounting a copier or printer subsystem
An apparatus for first aligning by trial and error, and then mounting or fastening a subsystem of an electrostatographic copier or printer such that the subsystem thereafter can be removed, serviced, and then remounted or reinstalled in precise alignment ...
04/16/1991
4854086Abrasive disc
An abrasive disc comprising a bonded abrasive body having a substantially flat mounting surface, a plurality of anchors each including a cup-shaped metallic washer having a flat top surface portion substantially flush with the flat mounting face and an an...
08/08/1989
4763456Roof anchor and stress plate assembly
An anchor and stress plate assembly adapted to secure an insulation layer to the deck of a roof without penetrating the lower surface of the deck which is formed either of relatively soft or hard decking material. The anchor is provided with a flanged hea...
08/16/1988
4574551Load-bearing plate
A load-bearing square plate usable in conjunction with an anchor bolt to firmly secure a layer of thermal insulation material to a roof surface to prevent the layer from being blown away as a result of strong updrafts. The plate has a center hole for rece...
03/11/1986
4558548Non-displaceable shim
A non-displaceable, self-righting shim for use in any application where critical alignment is required of adjacent vertical elements. The shim presents an elongated central opening including a large upper portion and a small lower portion, and a slot havi...
12/17/1985
4193434Preassembled fastener unit for clamping plastic workpieces
A preassembled bolt and washer-like device designed for use in securing an upper, plastic-like workpiece to a lower support structure so that cold flow of the plastic is minimized while applying a relatively high clamp load to the joint. The washer includ...
03/18/1980
 
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