초록 ▼

A depth-insensitive concrete fastener system is provided for securing roofing insulation materials to concrete roofing or decking. The concrete roofing or decking substructure is provided with a pre-drilled hole or bore having a predetermined diametrical extent. An anchor bolt fastener comprises a h

A depth-insensitive concrete fastener system is provided for securing roofing insulation materials to concrete roofing or decking. The concrete roofing or decking substructure is provided with a pre-drilled hole or bore having a predetermined diametrical extent. An anchor bolt fastener comprises a head portion, a pointed tip portion, and a shank portion interconnecting the head and tip portions. The shank portion has a first relatively smooth shank portion disposed adjacent to the head portion and extending toward the tip portion, and a second ribbed portion disposed adjacent to the tip portion and having an axial extent which is only a fractional portion of the entire axial extent of the fastener. The diametrical extent of the first smooth shank portion is less than that of the pre-drilled hole or bore defined within the concrete substructure, whereas the diametrical extent of the second ribbed shank portion is greater than the diametrical extent of the pre-drilled hole or bore defined within the concrete substructure. Therefore, when the anchor bolt fastener is impactly driven into the pre-drilled hole or bore of the concrete substructure, an interference or friction fit is defined between the anchor bolt fastener and interior sidewalls of the concrete substructure defining the pre-drilled hole or bore only along the axial extent of the second ribbed shank portion of the bolt fastener. Consequently, the fastener system is rendered depth-insensitive in that regardless of the depth to which the anchor bolt fastener is driven into the concrete substructure, the installation force does not increase beyond a predetermined limit. A roofing washer element may be pre-assembled upon the anchor bolt fastener as a result of being captured between the head and second ribbed shank portions of the bolt fastener.

대표청구항 ▼

[ What is claimed as new and desired to be protected by Letters Patent, is:] [1.] A depth-insensitive concrete fastener system for fastening material objects to a concrete substructure, comprising:a concrete substructure;a bore-hole, having a predetermined diametrical extent, defined within said con

[ What is claimed as new and desired to be protected by Letters Patent, is:] [1.] A depth-insensitive concrete fastener system for fastening material objects to a concrete substructure, comprising:a concrete substructure;a bore-hole, having a predetermined diametrical extent, defined within said concrete substructure;a material object disposed upon said concrete substructure; andanchor fastener means, comprising a tip portion, a head portion, and a shank portion, interconnecting said tip and head portions, for insertion within said bore-hole of said concrete substructure for securing said material object upon said concrete substructure;said shank portion of said anchor fastener means being solid, formed from a material and as a structural component which is substantially non-deformable when driven into said bore-hole defined within said concrete substructure, and comprising a first portion commencing immediately adjacent to said head portion, extending axially toward said tip portion, and having a first predetermined diametrical extent which is less than said predetermined diametrical extent of said bore-hole defined within said concrete substructure; and a second ribbed portion interposed between said first shank portion and said tip portion and comprising a circumferential array of substantially axially extending rib means, which are integrally formed upon, and from said material comprising, said shank portion of said anchor fastener means, which have a second predetermined diametrical extent which is greater than said predetermined diametrical extent of said bore-hole defined within said concrete substructure, which have an axial extent which is only a fractional portion of the axial extent of said shank portion of said anchor fastener means, and which have a substantially uniform cross-sectional configuration throughout said axial extent thereof, for permitting axial insertion of said anchor fastener means within said bore-hole defined within said concrete substructure in a substantially linear, impact driven manner and with an interference fit defined between said substantially axially extending, uniformly cross-sectioned rib means of said anchor fastener means and said bore-hole defined within said concrete substructure only along said axial extent of said second ribbed portion of said anchor fastener means so as to render said anchor fastener means, and said concrete fastener system, depth-insensitive regardless of the depth to which said anchor fastener means is driven into said bore-hole defined within said concrete substructure.