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| Number | Title | Issue Date |
| 7165925 | Self adjusting, high strength, screw system A fastener system and method of inserting it, that includes a screw or bolt having two interleaved helical threads, which brackets or forms a groove for a helicoil. The helicoil expands and torques by various means to maintain hold and purchase between the screw coi... | 01/23/2007 |
| 7152837 | Hanger apparatus A hanger apparatus is fabricated of a strand of material that is formed into a plurality of coils of incrementally decreasing diameter to fabricate a tapered, hollow helix. A hook or other engagement means is integrally formed at one end of the helix. The helix is c... | 12/26/2006 |
| 7082664 | Method for mounting an anchor An fastener for securing fixtures to buildings or other base materials. The fastener is assembled by a mechanical engagement between two pieces. The first piece includes a first and second bore. The first bore may be connected to a fixture, such as a pipe hanger, an... | 08/01/2006 |
| 7067730 | Keyboard musical instrument having keys regulated with stable key balance pieces A key is an indispensable component parts of an acoustic or electronic keyboard musical instrument, and key balancers are embedded in the key for varying the moment exerted on the key; the key balancers are fastened to the key by means of an anchor so that the key b... | 06/27/2006 |
| 7004702 | System for connecting elements A fastener system for connecting and releasing two elements. The system comprises a rod-shaped product with a male part and a female part, in which the male part is sized to be receivable in the female part. Either the male or female part is provided with a screw th... | 02/28/2006 |
| 6926483 | Joining assembly for joining a pair of structural members A joining assembly for joining a pair of structural members, comprises a bolt having a thread and a nut-like blind rivet adapted to be inserted into mounting holes of the structural members and to be threadingly engaged to each other. One of the mounting holes is ma... | 08/09/2005 |
| 6918723 | Shaft/hub connection The shaft is connected to the shaft attachment by a thread. A bore with an internal thread is incorporated in the shaft attachment and the shaft has a corresponding stem which can be introduced into the threaded bore and has an external thread. An axial stop is arra... | 07/19/2005 |
| 5599094 | Mounting system for light fixture A mounting system for luminaire assemblies includes a mounting fixture which can be inserted into a tubular pole and secured therein without the need for complicated fasteners or tools. Specifically, the mounting fixture includes a cylindrical fitting wit... | 02/04/1997 |
| 5366328 | Assembly for inserting an attachment coil in concrete An assembly for inserting an attachment coil in concrete with a screw having a releasable spacer and an expandable coil mounted thereon. The spacer initially positions the screw in a hole for location of the coil and has a slot to permit the spacer to pop... | 11/22/1994 |
| 5332153 | Sleeve for increasing retention value of a screw The retention value of a screw previously inserted into a wooden railroad tie is increased by an axially extending sleeve ( 20 ) having an external thread ( 24 ) and an internal thread (25). The thread revolutions of the internal thread (25) are offset ax... | 07/26/1994 |
| 5312214 | Securing devices A spiral member for improving the grip of screws in wooden or other receptive substrates is disclosed. The spiral member has a central axial drive pin by which it can be driven into a thread in the receptive substrate, and it has an improved cross section... | 05/17/1994 |
| 5006023 | Strip-out preventing anchoring assembly and method of anchoring An anchoring assembly and method for securing a threaded elongate member such as a bolt or screw in a material engaging position in a preformed hole in a relatively frangible material. The anchoring assembly is formed of a threaded elongate member and coi... | 04/09/1991 |
| 4762453 | Helical coil fastener A fastener having a retaining member with a top portion and an elongated hub extending downwardly from the top portion. A helical groove extends throughout a substantial portion of the length of the hub and the upper end of the helical groove is formed to... | 08/09/1988 |
| 4712955 | Expandable fastener assembly The present invention provides an expandable fastener assembly for use in materials which cannot be successfully fastened by conventional screw threads. The assembly includes an insert (20) constructed as a coil to expand uniformly along its convolutions ... | 12/15/1987 |
| 4601092 | Method of fixing a rail on a support of timber or cast or moulded material A method and a device for attaching a rail on a timber support. The device includes a helically threaded fastener adapted to be screwed into a helically threaded borehole in the support after a rectangular metal insert is positioned in a rectangular openi... | 07/22/1986 |
| 4536115 | Anchor apparatus for insertion into a pre-formed hole The disclosure herein includes an apparatus and method for positioning an anchoring device in the form of a coil in a pre-drilled hole for firmly engaging a lag screw or other member. The coil consists of a series of turns and may be made of steel or plas... | 08/20/1985 |
| 4309135 | Concrete anchor An improved concrete anchor consists of an expansion nut in the form of a cylindrical coil of a resilient material and a bolt provided with a thread adapted to receive the coil. The thread of the bolt has two sections of different effective minor diameter... | 01/05/1982 |
| 4182091 | Mounting arrangement A mounting arrangement for mounting an object to a support structure at a predetermined distance from the latter, comprises an expansion sleeve having an inner hole and insertable into a hole of the support structure, an expander screw adapted to pass thr... | 01/08/1980 |
| 4147444 | Expansion dowel An expansion dowel includes a cylindrically shaped axially extending sleeve and a spreader for expanding the sleeve. The sleeve has a leading end and a trailing end and at least one axially extending slot formed in the sleeve. For at least a portion of it... | 04/03/1979 |
| 4085652 | Screw fixing device for structural units of agglomerated material A screw fixing device for a structural member of agglomerated material, e.g. of plaster or concrete, comprising a member for accomodating the screw integrated to said structural member at the moment of manufacturing the latter, characterized in that said ... | 04/25/1978 |
| 4075925 | Spring action expansion bolt A masonry expansion bolt employs one or more resilient wires as the expansible wedging member which is positioned in annular grooves along the external surface portion of the bolt shank, the wedging member being selectively expansible in an outward radial... | 02/28/1978 |
| 3983736 | Helically wound mandrel assembly A mandrel assembly for expanding holes through work pieces including a helically wound coil member with interconnected helical flights and a support member with the support member supporting the flights of the coil member so that the leadingmost flight ha... | 10/05/1976 |
| 3967525 | Spring action expansion bolt A masonry expansion bolt employs one or more resilient wires as the expansible wedging member which is positioned in annular grooves along the external surface portion of the bolt shank, the wedging member being selectively expansible in an outward radial... | 07/06/1976 |
