Wood insert

• US 4,822,223 A
• Filed: 09/23/1987
• Issued: 04/18/1989
• Est. Priority Date: 09/23/1987
• Status: Expired due to Fees

• Current Assignee: William L. Williams
• Original Assignee: William L. Williams
• Inventors: Williams, William L.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Brueske, Curtis B.
• Application Number:
  US07/100,252
• Time in Patent Office: 573 Days
• Field of Search: 411/82, 411/258, 411/177, 411/178, 411/69, 411/427, 52/705, 52/707, 52/784, 403/268, 403/266
• US Class Current: 411/82
• CPC Class Codes: F16B 13/14 Non-metallic plugs or sleeves not used, see F16B13/002- F16B13/12; Use of liquid, loose solid or kneadable material therefor
• CPC Class Codes: F16B 37/122 Threaded inserts, e.g. "rampa bolts"
• CPC Class Codes: Y10T 403/473 Socket or open cup for bonding material

Abstract

An insert for securing a threaded object in a recipient material. The insert is formed from a cylinder-shaped body. The body has a threaded cavity at its first end for receiving a threaded object. A portion of the cylinder'"'"'s exterior surface adjacent to the first end is threaded for placing the insert in a hole in the recipient material and then stabilizing the insert therein. Additional stability is provided by the interface of a flange on the cylinder'"'"'s second end with an adhesive which is placed in the hole with the insert. The flange is formed by a circumferential recess near the cylinder'"'"'s second end. The adhesive occupies the recess and, when it hardens and bonds to the recipient material adjacent to the recess, serves as an circular barrier abutting the inner boundary of the flange. The barrier prevents the insert from being pulled from the hole. The flange'"'"'s perimeter is wave shaped for interfacing with the adhesive in the hole to anchor the insert against rotation which would tend to loosen the insert.

Claims

1. An insert for securing coupling means in a recipient material comprising:

a body having a first end, a second end, and an exterior annular surface therebetween;

a first portion of said body near said first end being formed into a recess for accommodating a first part of an adhesive placed in a hole in said recipient material with said insert and thereby allowing said first part to form a protrusion adhered to said recipient material adjacent to said recess at the inner surface of said hole and extending into said recess which protrusion, after said adhesive hardens, acts as a barrier resisting removal of said insert from said hole;

a second portion of said surface extending from said second end to a point on said surface coextensive with the edge of said recess closest to said second end having first penetrating means for engaging said recipient material at said inner surface, said engaging means axially securing said insert in said hole;

a third portion of said surface having a plurality of indentations, said indentations being sized and shaped whereby said third portion takes a wave-like shape, said shape of said periphery for interfacing with a second portion of said adhesive in which said third portion is embedded when said insert is installed in said hole having said adhesive placed therein, said indentations being sized such that there are six wave crests and six wave troughs on said periphery for providing an effective interface with said second portion of said adhesive, said wave crests and said wave troughs having a relative wave height of either substantially core nor substantially less than one eighth of said body'"'"'s maximum diameter;

said cylindrical body further having an axially-oriented columnar cavity at said first end, said cavity having second engaging means for engaging with said coupling means.

2. The invention of claim 1 wherein said first engaging means are first threads for threadingly engaging said recipient material at said annulus upon rotation of said insert in a first direction for directing said insert into said hole and thereafter securing said insert in said hole.

3. The invention of claim 2 wherein said second engaging means are second threads for engaging threaded coupling means.

4. The invention of claim 2 wherein said wave crests threads at no point along said periphery extend radially further than said body between said first threads at a comparable circumferential position on said body, thereby insuring that said flange may pass into said hole sized for engaging said first threads when said insert is installed in said hole.

5. An insert for securing a threaded object in a recipient material comprising:

a cylindrical body of unitary construction having a first end, a second end, and an exterior annular surface therebetween;

said cylindrical body having a circumferential recess in a first portion of said surface near said first end, said recess for accommodating a first part of an adhesive placed in a hole in said recipient material with said insert and thereby allowing said first part to form a rim adhered to said recipient material adjacent to said recess at an inner annulus of said hole and extending into said recess which rim, after said adhesive hardens, acts as a continuous circular barrier past which a flange formed at said first end by said recess cannot pass, thereby preventing removal of said insert from said hole;

a second portion of said surface extending from said second end to the edge of said recess closest to said second end having first threads for threadingly engaging said recipient material at said annulus upon rotation of said insert in a first direction for directing said insert into said hole and thereafter further securing said insert in said hole;

said flange'"'"'s radial periphery having a plurality of indentations, said indentations being sized and shaped whereby said periphery takes a wave-like shape, said shape of said periphery for interfacing with a second portion of said adhesive in which said flange is embedded when said insert is installed in said hole having said adhesive placed therein, said indentations being sized such that there are six wave crests and six wave troughs on said periphery for providing an effective interface with said adhesive, said wave crests and said wave troughs having a relative wave height of approximately one eighth of said body'"'"'s maximum diameter, and said flange at no point along said periphery extends radially further than said body between said first threads at a comparable circumferential position on said body, thereby insuring that said flange may pass into said hole sized for engaging said first threads when said insert is installed in said hole;

said cylindrical body further having an axially-oriented columnar cavity at said second end, said cavity having second threads for interfacing with said threaded object.

6. The invention of claim 5 wherein said recess has a width parallel with the longitudinal axis of said body no less than one sixth of said body'"'"'s overall longitudinal length, and a depth relative to said body on either side of said recess and perpendicular to said longitudinal axis approximately one fourth of said body'"'"'s maximum diameter.

7. An insert for securing a threaded object in wood comprising:

a metallic cylindrical body of unitary construction having a first end, a second end, and an exterior annular surface therebetween;

a recess formed into said exterior annular surface near said first end, said recess having a depth from said annular surface approximately equal to one fourth of said body'"'"'s maximum diameter and a width parallel with the longitudinal axis of said body no less than approximately one sixth of the longitudinal length of said body, said recess for accommodating a first part of an adhesive placed in a hole in said wood with said insert and thereby allowing said first part to form a rim adhered to said wood adjacent to said recess at the inner annulus of said hole and extending into said recess, which rim, after said adhesive hardens, acts as a continuous circular barrier past which a flange formed at said first end by said recess cannot pass, thereby preventing movement of said insert from said hole;

said flange'"'"'s radial periphery being formed into a wave-like shape having at least six wave crests and wave troughs with a wave height equal to at least one eighth of said body'"'"'s maximum diameter, said shape for permitting a mechanical interface between said periphery and a second part of said adhesive which is adhered to said wood adjacent to said periphery, said interface preventing rotation of insert in response to torque applied to said insert thereby further securing said insert in said hole, said periphery, between adjacent said wave crests, defining voids through which said first part of said adhesive may pass to fill said recess as said insert is installed into said hole;

a second portion of said exterior annular surface extending from said second end to the edge of said recess closest to said second end having first threads for threadingly engaging said wood at said annulus of said hole upon rotation of said insert in a first direction for directing said insert into said hole and thereafter securing said insert in said hole;

an axially-oriented columnar cavity at said second end, said cavity having second threads for engaging said threaded object;

said insert, when installed in said hole having said adhesive placed therein, being concurrently secured in said hole by said external thread'"'"'s engagement with said wood at said annulus of said hole, by said rim formed from said first part of said adhesive filling said recess, and by said interface of said flange'"'"'s wave shaped periphery with said second part of said adhesive; and

said insert providing means for securing said threaded object in said wood against forces directed outward from said hole and forces exerting torque on said insert.

8. The invention of claim 7 wherein said flange'"'"'s periphery has at least six wave crests and six wave troughs having a relative wave height of approximately one eighth of said body'"'"'s maximum diameter.