Large diameter tapcon with debris reservoir end or tip
AssigneeIllinois Tool Works Inc.
InventorsDavid Forsell, Richard J. Ernst
Life of this patent
Estimating the term…
Abstract
A masonry anchor is provided with a reaming portion which includes recessed portions for defining reservoir regions for accumulating debris generated by the reaming operation when the anchor is installed within a masonry structure. The accumulation of the debris within the reservoir regions reduces torsional friction and installation torque characteristic of the anchor installation operation. Masonry anchors which are self-tapping or self-threading and which do not have reaming portions operatively associated therewith can also have such recessed reservoir structure defined thereon for such similar dust and debris accumulation and discharge purposes.
Claims33
A masonry anchor for insertion into a masonry structure, comprising:
- a shank portion having an outer peripheral surface portion;
- a head portion formed upon a first end of said shank portion;
- a tip portion formed upon a second opposite end of said shank portion;
- a reaming portion disposed adjacent to said tip end portion of said shank portion and comprising a pair of diametrically opposite cutting edges;
- a threaded portion formed upon said outer peripheral surface portion of said shank portion intermediate said head and tip portions;
- and
- surface portions, interconnecting said reaming portion and said threaded portion of said shank portion, and recessed radially inwardly from said outer peripheral surface portion of said shank portion, for defining recessed reservoir regions for accumulating dust and debris generated during an insertion operation of said masonry anchor into the masonry structure.
A masonry anchor for insertion into a masonry structure, comprising:
- a shank portion having an outer peripheral surface portion;
- a head portion formed upon a first end of said shank portion;
- a tip portion formed upon a second opposite end of said shank portion;
- a reaming portion disposed adjacent to said tip end portion of said shank portion and comprising a pair of diametrically opposite cutting edges;
- a threaded portion formed upon said shank portion intermediate said head and tip portions;
- and
- surface portions, disposed axially upstream of said tip portion as considered in the direction of insertion of said masonry anchor within the masonry structure, interconnecting said reaming portion and said threaded portion of said shank portion, and recessed radially inwardly from said outer peripheral portion of said shank portion, for defining recessed reservoir regions for accumulating dust and debris generated during an insertion operation of said masonry anchor into the masonry structure.
A method of forming a masonry anchor for insertion into a masonry structure, comprising the steps of:
- cutting a cylindrical blank to a predetermined length so as to form an anchor shank portion having an outer peripheral surface portion;
- providing a head portion upon a first end of said shank portion;
- providing a tip portion upon a second opposite end of said shank portion;
- providing a reaming portion adjacent to said tip end portion of said shank portion wherein said reaming portion comprises a pair of diametrically opposite cutting edges;
- providing a threaded portion upon said shank portion intermediate said head and tip portions by means of a thread rolling operation;
- and
- providing surface portions upon said shank portion of said anchor such that said surface portions interconnect said reaming portion to said threaded portion of said shank portion and are recessed radially inwardly from said outer peripheral portion of said shank portion so as to define recessed reservoir regions for accumulating dust and debris generated during an insertion operation of said masonry anchor into the masonry structure.
Dependencies are inferred from the claim text.