Modified pocket former

Patent metadata

Field	Value
Publication number	US-10072429-B2
Application number	US-201715430152-A
Country	US
Kind code	B2
Filing date	Feb 10, 2017
Priority date	May 19, 2014
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A pocket former includes a pocket former body and a keyway former. The pocket former is adapted to form a void in a concrete member allowing access to the stressing end of a post-tensioning tendon. The keyway former is adapted to form a keyway in the concrete to allow grout to be more securely retained in the void.

First claim

The invention claimed is:

1. A pocket former comprising:
a pocket former body, the pocket former body having an outer surface; and
a keyway former, the keyway former positioned on the outer surface of the pocket former body, the keyway former being generally annular in shape and having an external surface;
wherein the pocket former body and keyway former are formed as a single unit and wherein the unit includes at least one perforation to allow for the separation of the pocket former body and the keyway former.

2. The pocket former of claim 1 wherein the pocket former body is tapered from a first end to a second end of the pocket former body.

3. The pocket former of claim 1 wherein the keyway former is continuous about the perimeter of the outer surface of the pocket former body.

4. The pocket former of claim 1 wherein the keyway former further comprises a removal feature coupled to the keyway former and extending at least partially along the outer surface of the pocket former body.

5. The pocket former of claim 4 wherein the removal feature comprises a tab, the tab adapted to allow the keyway former to be removed from a concrete member.

6. The pocket former of claim 1 wherein the external surface of the keyway former comprises a surface texture.

7. The pocket former of claim 6 wherein the surface texture comprises at least one of cross hatches, grooves, stipples, ridges, knurls, flutes, or any combination thereof.

8. The pocket former of claim 6 wherein the surface texture comprises at least one of protrusions from the keyway former or depressions into the keyway former.

9. The pocket former of claim 1 wherein the keyway former further comprises at least one protrusion extending from the external surface thereof.

10. The pocket former of claim 9 wherein the protrusion comprises at least one of a cylindrical, prismatoidal, or ellipsoidal protrusion.

11. The pocket former of claim 9 wherein the protrusions are deformable.

12. The pocket former of claim 9 wherein the protrusions are temporarily coupled to an exterior surface of the pocket former body.

13. The pocket former of claim 1 wherein the keyway former is formed from a generally pliable material.

Assignees

• Sorkin Felix

Inventors

• Sorkin Felix

Classifications

• E04G15/04 Primary

  Cores for anchor holes or the like {around anchors embedded in the concrete (means in or on the building element for connecting to handling apparatus E04G21/142)} · CPC title

• B28B23/024

  Supporting means · CPC title

• B28B7/306

  pliable or extensible · CPC title

• B28B1/14

  by simple casting, the material being neither forcibly fed nor positively compacted (for molten material B28B1/54) · CPC title

• B28B7/303

  specially for making undercut recesses or continuous cavities the inner section of which is superior to the section of either of the mouths · CPC title