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Injection molded thermoplastic insertRelated Patent Categories: Expanded, Threaded, Driven, Headed, Tool-deformed, Or Locked-threaded Fastener, Having Structure To Restrict Rotation Of Threaded, Mating Pieces (e.g., Nut Lock), Including Settable MaterialInjection molded thermoplastic insert description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080069661, Injection molded thermoplastic insert. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority from U.S. patent Ser. No. 10/753,630, filed Jan. 8, 2004, which claimed priority from U.S. Provisional Patent Application No. 60/439,013, filed Jan. 9, 2003. The entire disclosures of both applications are hereby incorporated by reference. FIELD OF THE INVENTION Field of the Invention [0002] The present invention relates to pre-formed inserts, and the like, used with concrete structures. BACKGROUND [0003] Pre-formed inserts for use with concrete structures are known. The inserts are typically incorporated into the structure during concrete pouring to facilitate attachment of threaded fasteners, such as bolts and the like. [0004] Prior art inserts include internally threaded barrels which are tensioned axially by an attached bolt. The prior art insert also include a base at a distal end of the barrel. The base extends outwardly from the barrel to embed the insert within a concrete structure and increase the force necessary to pull the insert out of the concrete structure. The prior art insert further includes tapering ribs connected to the base and to an outer surface of the barrel to strengthen the base. [0005] Prior art inserts, initially made of metal, have also been made from injection molded thermoplastic (acetal) materials. The inserts are made in a variety of sizes for receiving bolts of various diameters, such as 1/4'', 3/8'', 1/2'', 5/8'', 3/4'', 1'', 11/2'', for example. The metal and plastic inserts of the prior art are similar in construction. The plastic prior art inserts, however, stretch to a greater extent than the corresponding metal inserts because of increased elongation properties of plastic compared to steel. As the barrel of the plastic insert stretches, the reinforcing ribs become wedged against the concrete. Resulting failure of the plastic inserts short of the base creates a smaller shear cone compared to that created by a comparably sized metal insert, which undesirably equates to a lower pull out force for the prior art plastic insert. SUMMARY OF THE INVENTION [0006] According to the present invention there is provided an insert adapted for receiving a threaded fastener for attachment of the fastener to a concrete structure. Preferably, the insert is made from a plastic material. The insert includes an elongated barrel having opposite proximal and distal ends and defining an interior for receiving a shaft of the threaded fastener. [0007] According to one embodiment of the invention, the insert includes a housing connected to the barrel adjacent the distal end of the barrel. The housing defines an interior adapted to receive an internally threaded member for engagement with a threaded portion of the fastener shaft. The insert further includes at least one bar-engaging member connected to the housing adjacent an outer peripheral edge of the housing and extending outwardly therefrom for contact with a concrete-reinforcing bar of the concrete structure to anchor the insert within the concrete structure. [0008] The insert may also include a bar-engaging member located adjacent the proximal end of the barrel adapted for contact with a concrete-reinforcing bar of the concrete structure. Preferably, the proximal bar-engaging member includes a retainer defining a substantially semi-circular channel adapted for receipt of a U-shaped portion of the concrete-reinforcing bar. Preferably, the retainer is connected to a base defining a substantially cylindrical interior removably receiving the barrel to facilitate receipt of the U-shaped portion of the concrete-reinforcing bar in the channel defined by the retainer. [0009] The insert may also include a cover adapted for removable attachment to the housing such that the interior defined by the housing is enclosed. Preferably the cover includes at least one ring adapted to engage a post connected to the housing. Preferably, the cover is connected to the housing by an elongated flexible connector. [0010] According to another embodiment of the invention, the insert includes a base connected to the barrel adjacent the distal end of the barrel. The base extends outwardly beyond an outer surface of the barrel to define a surface that is oriented substantially perpendicular to a central axis of the barrel for anchoring the insert within the concrete structure. [0011] The insert also includes a plurality of elongated ribs each connected to the base and to the barrel. Each of the ribs includes a plurality of segments arranged in series along the length of the rib and including a first segment located adjacent the base. Each segment of the rib extends radially from an outer surface of the barrel to a distance that decreases with each succeeding segment from the first segment such that each segment defines a surface that is oriented substantially perpendicular to the central axis of the barrel. Preferably, the ribs are spaced substantially equally about a circumference of the barrel. The barrel of the insert preferably includes threads formed on an inner surface of the barrel for threadedly engaging a threaded portion of the fastener shaft. [0012] Preferably, the elongated ribs include ribs of varying lengths and are arranged such that a last segment of each rib remote from the base is offset axially with respect to the barrel from the last segment of adjacent ribs. BRIEF DESCRIPTION OF THE DRAWINGS [0013] For the purpose of illustrating the invention, there is shown in the drawings a form that is presently preferred; it being understood, however, that this invention is not limited to the precise arrangements and instrumentalities shown. In the drawings: [0014] FIG. 1 is a perspective view of an insert according to a first embodiment of the invention. [0015] FIG. 2 is a perspective view of the insert of FIG. 1 shown with concrete-reinforcing bars. [0016] FIG. 3 is a perspective view of the barrel and distal end portion of the insert of FIG. 1. [0017] FIG. 4 is a perspective view of the proximal end portion of the insert of FIG. 1. [0018] FIGS. 5 and 6 are perspective views of inserts according to a second embodiment of the invention. DETAILED DESCRIPTION OF THE INVENTION Continue reading about Injection molded thermoplastic insert... Full patent description for Injection molded thermoplastic insert Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Injection molded thermoplastic insert patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Injection molded thermoplastic insert or other areas of interest. ### Previous Patent Application: Hopper fed tee-nut having counterbore with nylon lock Next Patent Application: Structure for attaching protective member to a support Industry Class: Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener ### FreshPatents.com Support Thank you for viewing the Injection molded thermoplastic insert patent info. 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