U.S. patent application number 15/382284 was filed with the patent office on 2017-09-28 for anchor.
The applicant listed for this patent is Felix Sorkin. Invention is credited to Felix Sorkin.
Application Number | 20170275881 15/382284 |
Document ID | / |
Family ID | 57737577 |
Filed Date | 2017-09-28 |
United States Patent
Application |
20170275881 |
Kind Code |
A1 |
Sorkin; Felix |
September 28, 2017 |
ANCHOR
Abstract
An anchor includes an anchor body and an insert at least
partially within the anchor body. The anchor also includes a
coupler body, the coupler body mechanically coupled to the insert,
and a coupler nut, the coupler nut coupled to the coupler body.
Inventors: |
Sorkin; Felix; (Stafford,
TX) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Sorkin; Felix |
Stafford |
TX |
US |
|
|
Family ID: |
57737577 |
Appl. No.: |
15/382284 |
Filed: |
December 16, 2016 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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62313428 |
Mar 25, 2016 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
E04C 5/12 20130101 |
International
Class: |
E04C 5/12 20060101
E04C005/12 |
Claims
1. An anchor for a post-tensioning tendon comprising: an anchor
body; an insert at least partially within the anchor body; a
coupler body, the coupler body mechanically coupled to the insert;
and a coupler nut, the coupler nut coupled to the coupler body.
2. The anchor of claim 1, wherein the coupler body further
comprises an anchor coupling flange having coupling features formed
thereon and the insert further comprises corresponding coupling
features formed thereon for mechanically coupling the coupler body
to the insert.
3. The anchor of claim 2, wherein the coupling features and
corresponding coupling features comprise one or more of a threaded
connection or bayonet ramps.
4. The anchor of claim 1, wherein the coupler body further
comprises an anchor coupling flange having bayonet ramps formed
thereon, and the insert further comprises corresponding bayonet
ramps formed thereon for mechanically coupling the coupler body to
the insert.
5. The anchor of claim 1, wherein the coupler body further
comprises threads formed on an exterior surface thereof for
coupling the coupler body to the coupler nut.
6. The anchor of claim 1, further comprising a pocket former, the
pocket former positioned about the coupler body.
7. The anchor of claim 1, wherein the coupler body is threadedly
coupled to the anchor body.
8. The anchor of claim 1, wherein the insert is mechanically
coupled to the anchor body by press fitting, mechanical welding,
chemical welding, friction welding, thermal coupling or welding,
electrical welding, optical welding, or beam-energy welding.
9. The anchor of claim 1, wherein the insert is formed from a flame
resistant material.
10. The anchor of claim 1, wherein the insert is formed from
metal.
11. The anchor of claim 1, wherein the insert is formed from at
least one of steel, aluminum, or zinc.
12. A method of forming a post-tensioned concrete member
comprising: positioning a post-tensioning tendon within a concrete
form, the post-tensioning tendon including a tension member, a
fixed anchor, and a stressing anchor, the fixed anchor positioned
at a first position within the concrete form, the stressing anchor
positioned at a second position within the concrete form, the
tension member extending between the fixed anchor and the stressing
anchor, one or both of the fixed anchor and stressing anchor
including: an anchor body, the anchor body including an insert; a
coupler body; and a coupler nut; mechanically coupling the coupler
body to the insert; positioning the coupler body through an end of
the concrete form; threadedly coupling the coupler nut to the
coupler body; placing concrete into the concrete form; and
tensioning the tension member.
13. The method of claim 12, further comprising: removing the
coupler nut; removing the end of the concrete form; and removing
the coupler body from the anchor body.
14. The method of claim 12, wherein the coupler body further
comprises an anchor coupling flange having coupling features formed
thereon and the insert further comprises corresponding coupling
features, and wherein mechanically coupling the coupler body to the
insert comprises coupling the coupler body to the insert.
15. The method of claim 14, wherein the coupling features and
corresponding coupling features comprise one or more of a threaded
connection or bayonet ramps.
16. The method of claim 12, wherein the coupler body further
comprises an anchor coupling flange having bayonet ramps formed
thereon and the insert further comprises corresponding bayonet
ramps, and wherein mechanically coupling the coupler body to the
insert comprises engaging the bayonet ramps of the coupler body
with the bayonet ramps of the insert.
17. The method of claim 12, wherein the insert is formed from a
flame resistant material.
18. The method of claim 12, wherein the coupler body further
comprises threads formed on an exterior surface thereof for
coupling the coupler body to the coupler nut.
19. The method of claim 18, wherein the threads formed on the
exterior surface of the coupler body are one or more of straight
threads, tapered threads, continuous threads, discontinuous
threads, threads of varying density, threads of varying angles, and
threads of varying pitch.
20. The method of claim 12, wherein the insert is formed from
metal.
21. The method of claim 12, wherein the insert is formed from at
least one of steel, aluminum, or zinc.
22. The method of claim 12, further comprising: positioning a
pocket former about the coupler body before the coupler body is
positioned through the end of the concrete form.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a nonprovisional application which
claims priority from U.S. provisional application No. 62/313,428,
filed Mar. 25, 2016.
TECHNICAL FIELD/FIELD OF THE DISCLOSURE
[0002] The present disclosure relates generally to post-tension
anchors. More particularly, the present disclosure relates to an
anchor used in post-tensioning concrete.
BACKGROUND OF THE DISCLOSURE
[0003] Many structures are built using concrete, including, for
instance, buildings, parking structures, apartments, condominiums,
hotels, mixed-use structures, casinos, hospitals, medical
buildings, government buildings, research/academic institutions,
industrial buildings, malls, bridges, pavement, tanks, reservoirs,
silos, foundations, sports courts, and other structures.
[0004] Prestressed concrete is structural concrete in which
internal stresses are introduced to the concrete member to reduce
potential tensile stresses in the concrete resulting from applied
loads; prestressing may be accomplished by post-tensioned
prestressing or pre-tensioned prestressing. In post-tensioned
prestressing, a tension member is tensioned after the concrete has
attained a specified strength by use of a post-tensioning tendon.
The post-tensioning tendon may include for example and without
limitation, anchors, the tension member, and sheathes or ducts. One
having ordinary skill in the art with the benefit of this
disclosure will understand that a tension member could be any
suitable material exhibiting tensile strength which can be
elongated including, for example and without limitation,
reinforcing steel, single or multi-strand cable. One having
ordinary skill in the art with the benefit of this disclosure will
likewise understand that the tension member may be formed from a
metal or composite without deviating from the scope of this
disclosure. The post-tensioning tendon includes an anchor at each
end. The tension member is fixedly coupled to a fixed anchor
positioned at one end of the tension member, the so-called
"fixed-end" of the tension member, and is adapted to be stressed at
the stressing anchor, the "stressing-end" of the tension
member.
[0005] The concrete may be poured into a concrete form. The
concrete form may be a form or mold into which concrete is poured
or otherwise introduced to give shape to the concrete as it sets or
hardens thus forming a concrete member.
[0006] Each anchor is typically nailed to the concrete form to
attach the anchor to the concrete form in which the concrete member
is to be formed.
[0007] To allow access to the stressing-end of the post-tensioning
tendon once the concrete is poured, a pocket former may be utilized
to prevent concrete from filling the area between the stressing
anchor and the concrete form used to form the concrete member. Once
the concrete has sufficiently hardened and the concrete form is
removed, the pocket former is removed from the concrete member.
Traditionally, pocket formers are tapered to, for example, allow
for easier removal from the concrete member. Typically, once the
post-tensioning tendon is stressed, thereby forming a
post-tensioned concrete member, and the pocket former removed, the
pocket formed by the pocket former is filled with a material such
as a cementitious chloride-free grout or concrete to, for example,
provide fire protection and corrosion protection.
SUMMARY
[0008] The present disclosure provides for an anchor for a
post-tensioning tendon. The anchor includes an anchor body and an
insert at least partially within the anchor body. The anchor also
includes a coupler body, the coupler body mechanically coupled to
the insert, and a coupler nut, the coupler nut coupled to the
coupler body.
[0009] The present disclosure also provides for a method of forming
a post-tensioned concrete member. The method includes positioning a
post-tensioning tendon within a concrete form, the post-tensioning
tendon including a tension member, a fixed anchor, and a stressing
anchor. The fixed anchor is positioned at a first position within
the concrete form, and the stressing anchor is positioned at a
second position within the concrete form. The tension member
extends between the fixed anchor and the stressing anchor, where
one or both of the fixed anchor and stressing anchor include an
anchor body, an insert at least partially within the anchor body, a
coupler body, and a coupler nut. The method also includes
mechanically coupling the coupler body to the insert and
positioning the coupler body through an end of the concrete form.
The method also includes threadedly coupling the coupler nut to the
coupler body and placing concrete into the concrete form. In
addition, the method includes tensioning the tension member.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The present disclosure is best understood from the following
detailed description when read with the accompanying figures. It is
emphasized that, in accordance with the standard practice in the
industry, various features are not drawn to scale. In fact, the
dimensions of the various features may be arbitrarily increased or
reduced for clarity of discussion.
[0011] FIGS. 1A-1F depict partial cross section views of an anchor
in a concrete pouring operation consistent with at least one
embodiment of the present disclosure.
[0012] FIG. 2 depicts an exploded view of an anchor consistent with
at least one embodiment of the present disclosure.
DETAILED DESCRIPTION
[0013] It is to be understood that the following disclosure
provides many different embodiments, or examples, for implementing
different features of various embodiments. Specific examples of
components and arrangements are described below to simplify the
present disclosure. These are, of course, merely examples and are
not intended to be limiting. In addition, the present disclosure
may repeat reference numerals and/or letters in the various
examples. This repetition is for the purpose of simplicity and
clarity and does not in itself dictate a relationship between the
various embodiments and/or configurations discussed.
[0014] When forming a concrete member to be post-tensioned, anchors
may be provided to hold the post-tensioning tendon both before and
after stressing. In some embodiments, as depicted in FIGS. 1A-B,
post-tensioning tendon 11 may be positioned within concrete form
21. Post-tensioning tendon 11 may include for example and without
limitation fixed anchor 13, tension member 15, and stressing anchor
17. Tension member 15 may extend between fixed anchor 13 positioned
at a first position within concrete form 21 and stressing anchor 17
positioned at another position within concrete form 21. In some
embodiments, post-tensioning tendon 11 may also include a sheath
(not shown) positioned about tension member 15 and one or more
seals (not shown) between the sheath and each anchor. The sheath
and seals may, for example, protect tension member 15 from
corrosion after concrete 23 (shown in FIG. 1B) is poured.
Additionally, the sheath and seals may, for example, reduce or
prevent concrete from ingressing into tension member 15 and
preventing or retarding its tensioning as discussed below. In some
embodiments, a seal for fixed anchor 13 may be omitted. As depicted
in FIG. 1A, in some embodiments, fixed anchor 13 may be positioned
within concrete form 21 such that fixed anchor 13 will be encased
in concrete 23. In some embodiments, fixed end cap 19 may be
positioned at the end of fixed anchor 13 to protect tension member
15 from corrosion after concrete 23 is poured.
[0015] As depicted in FIGS. 1A, 1B, fixed anchor 13 and stressed
anchor 17 each include anchor body 101. Anchor body 101 may be in
any configuration positionable within concrete form 21 coupleable
to tension member 15 as described herein that retains its position
within concrete 23 once concrete 23 sets. In some embodiments, as
shown with respect to stressed anchor 17, anchor body 101 may
include anchor plate 101a positioned to retain stressed anchor 17
in position under tension when positioned in concrete 23. In some
embodiments, anchor body 101 may further include coupler extension
102. Coupler extension 102 may be generally tubular and may extend
from anchor plate 101a.
[0016] In certain embodiments, such as those shown in FIGS. 1A-F
and 2, stressed anchor 17 may include coupler body 103. Coupler
body 103 may be generally tubular and may mechanically couple to
anchor body 101. Coupler body 103 may mechanically couple to anchor
body 101 by, for instance and without limitation, a bayonet ramp,
threaded connection, or discontinuous threaded connection. In some
embodiments, as depicted in FIG. 2, coupler body 103 may include
anchor coupling flange 104 having coupling features 105 for
mechanically coupling coupler body 103 to anchor body 101. Anchor
body 101 may include corresponding coupling features 107 formed on
interior surface 102a of coupler extension 102 which correspond
with coupling features 105 of coupler body 103 for coupling anchor
body 101 to coupler body 103. In some embodiments, coupling
features 105 and corresponding coupling features 107 may be a
threaded connection, including, for example and without limitation,
straight threads, tapered threads, continuous threads,
discontinuous threads, threads of varying density, threads of
varying angles, and threads of varying pitch. In some embodiments,
for example and without limitation, coupling features 105 and
corresponding coupling features 107 may have tapered ends or
straight ends, or may constitute male and female ends. In some
embodiments, coupling features 105 and corresponding coupling
features 107 may be corresponding bayonet ramps which engage to
mechanically couple coupler body 103 to anchor body 101. In some
embodiments, coupling features 105 and corresponding coupling
features 107 may include one or more tongues and corresponding
grooves positioned to press-fit coupler body 103 to anchor body
101. In other embodiments, coupler body 103 may couple to anchor
body 101 by, for example and without limitation, press fitting,
mechanical welding, chemical welding, friction welding, thermal
coupling or welding, electrical welding, optical welding, or
beam-energy welding.
[0017] In some embodiments, corresponding coupling features 107 may
be formed on an interior surface of insert 109. Insert 109 may be
positioned within coupler extension 102 of anchor body 101. In some
embodiments, insert 109 may be annular. In some embodiments, insert
109 may be a tube positioned on an interior surface 102a of coupler
extension 102. In some embodiments, insert 109 may substantially
cover interior surface 102a of coupler extension 102. Insert 109
may be mechanically coupled to coupler extension 102 by, for
example and without limitation, mechanical coupling such as, but
not limited to, press fitting, mechanical welding, chemical
welding, friction welding, thermal coupling or welding, electrical
welding, optical welding, or beam-energy welding. In some
embodiments, insert 109 may be formed from a flame resistant or
heat resistant material. In some such embodiments, insert 109 may
be formed from, for example and without limitation a metal such as
steel, aluminum, or zinc. In some such embodiments, by forming
insert 109 from a flame resistant or heat resistant material,
cutting operations, such as by torch or other similar methods, of
tension member 15 may be undertaken without damaging anchor body
101 as insert 109 may deflect or absorb heat or otherwise prevent
heat from a cutting operation away from anchor body 101.
[0018] In some embodiments, coupler body 103 may include threads
111 for mechanically coupling coupler body 103 to concrete form 21.
Threads 111 may be formed on an exterior surface of coupler body
103. Coupler nut 113 may include threads 115 that correspond with
threads 111 of coupler body 103 for threadedly coupling coupler nut
113 to coupler body 103. In some embodiments, threads 111 and 115
may be any type of threaded connection, including, for example and
without limitation, straight threads, tapered threads, continuous
threads, discontinuous threads, threads of varying density, threads
of varying angles, and threads of varying pitch. In some
embodiments, for example and without limitation, threads 111 and
115 may have tapered ends or straight ends, or may constitute male
and female ends. In some embodiments, as depicted in FIG. 1A,
coupler body 103 may be coupled to anchor body 101 such that when
stressing anchor 117 is positioned in concrete form 21, coupler
body 103 extends through a hole formed in end 22 of concrete form
21. Coupler nut 113 may be threaded onto coupler body 103 and
tightened.
[0019] In some embodiments, as depicted in FIG. 2, stressing anchor
17 may include pocket former 117. Pocket former 117 may be
positioned about coupler body 103 and may slide thereon. Pocket
former 117 may be positioned between the end of anchor body 101 and
end 22. Pocket former 117 may, for example and without limitation,
prevent concrete 23 from filling the space between anchor body 101
and the edge of the resultant concrete member formed by concrete 23
within concrete form 21. Pocket former 117 may thus allow access to
tension member 15 from without the concrete member once it is
sufficiently hardened and concrete form 21 is removed. Pocket
former 117 may be positioned on coupler body 103 before stressing
anchor 17 is positioned in concrete form 21 such that it extends
from anchor body 101 to end 22 of concrete form 21 as depicted in
FIG. 1A.
[0020] Tension member 15 may be threaded through stressing anchor
17, passing through anchor body 101 and coupler body 103 such that
tension member 15 extends from concrete form 21 as depicted in FIG.
1A. Tension member 15 may be threaded through stressing anchor 17
before or after stressing anchor 17 is coupled to end 22 of
concrete form 21.
[0021] Once stressing anchor 17 is positioned in concrete form 21,
concrete 23 may be placed into concrete form 21 as depicted in FIG.
1B. As depicted in FIG. 1C, when concrete 23 is poured, stressing
anchor 17 remains coupled to end 22. Concrete 23 substantially
surrounds the remainder of stressing anchor 17. Coupler nut 113 may
be removed from coupler body 103 as depicted in FIG. 1D. Anchor
body 101 may be held in place by concrete 23. End 22 may be removed
from concrete 23 as depicted in FIG. 1E. Coupler body 103 may then
be removed from anchor body 101 by, for example and without
limitation, unthreading it from insert 109. Tension member 15 may
then be tensioned as understood in the art.
[0022] Although depicted and described with stressing anchor 17,
the embodiments described herein are equally applicable to fixed
anchor 13.
[0023] The foregoing outlines features of several embodiments so
that a person of ordinary skill in the art may better understand
the aspects of the present disclosure. Such features may be
replaced by any one of numerous equivalent alternatives, only some
of which are disclosed herein. One of ordinary skill in the art
should appreciate that they may readily use the present disclosure
as a basis for designing or modifying other processes and
structures for carrying out the same purposes and/or achieving the
same advantages of the embodiments introduced herein. One of
ordinary skill in the art should also realize that such equivalent
constructions do not depart from the spirit and scope of the
present disclosure and that they may make various changes,
substitutions, and alterations herein without departing from the
spirit and scope of the present disclosure.
* * * * *