Patent Application
20160144494
The present disclosure relates to tools for use with post-tensioned concrete forming equipment.
Many structures are built using concrete, including, for instance, buildings, parking structures, apartments, condominiums, hotels, mixed-use buildings, casinos, hospitals, medical buildings, government buildings, research/academic institutions, industrial, malls, bridges, pavement, tanks, reservoirs, silos, foundations, sports courts, and other structures.
Prestressed concrete is structural concrete in which internal stresses are introduced to reduce potential tensile stresses in the concrete resulting from applied loads; this can be accomplished by two methods—post-tensioned prestressing and pre-tensioned prestressing. In a post-tensioned prestressing, the prestressing member is tensioned after a concrete member has attained a specified strength. In post-tensioning applications, the prestressing assembly, commonly known as a tendon, may include for example and without limitation, anchorages, the prestressing member, and sheathes or ducts. For the purposes of this disclosure, the prestressing member will be referred to as a “cable”, although one having ordinary skill in the art with the benefit of this disclosure will understand that the prestressing 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 prestressing member may be formed from a metal or composite without deviating from the scope of this disclosure. The tendon generally includes an anchorage at each end. The cable is generally fixedly coupled to a fixed anchorage positioned at one end of the tendon, the so-called “fixed-end”, and is adapted to be stressed at the other anchor, the “stressing-end” of the tendon.
In order to allow access to the stressing-end of the tendon once the concrete member is poured, a pocket former may be utilized to, for example, prevent concrete from filling in the area between the stressing-end anchor and the concrete form. Once the concrete has sufficiently hardened and the form is removed, the pocket former is removed from the concrete member. Generally, pocket formers are frustoconical in shape to, for example, allow for easier removal from the concrete member. However, removal of the pocket formers, especially when utilizing tools such as screwdrivers, may damage the pocket former, preventing it from being reused in another concrete member.
The present disclosure provides a pocket former removal tool. The pocket former removal tool includes a body, the body having a fulcrum, a first end and a second end. The pocket former removal tool further includes tines attached to the second end of the body.
The present disclosure further provides a method for removing a pocket former from a concrete member. The concrete member has a surface. The pocket former has a pocket former extension. The concrete member and the pocket former have a connection. The method includes supplying a pocket former removal tool. The pocket former removal tool includes a body, the body having a fulcrum, a first end and a second end. The pocket former removal tool further includes tines attached to the second end of the body, and a handle, the handle attached to the first end of the body. The method also includes positioning the pocket former removal tool such that the fulcrum is in contact with the concrete member and the tines are engaged with the pocket former extension, and applying a downward force to the handle to create an upward force on the pocket former.
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.
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.
In some embodiments of the present disclosure, pocket former removal tool 101 may be adapted to remove a pocket former from a concrete member. As depicted in
In some embodiments, as depicted in
In some embodiments, pocket former removal tool 101 may include tines 105 attached to a second end of body 104. In certain embodiments, tines 105 may be generally flat and tapered. Tines 105 may be used to engage pocket former 10, as depicted in
In the embodiments depicted in
In some embodiments, pocket former removal tool 101 may be used as a lever to remove pocket former 10 from concrete member 5. Fulcrum 106 contacts concrete member 5 between handle 103 and tines 105 when engaged with pocket former 10. Fulcrum 106, when in contact with concrete member 5, allows a downward force, i.e., towards concrete member 5, applied to handle 103 to create a resultant upward force on pocket former 10. By locating fulcrum 106 closer to tines 105 than handle 103, that is closer to the second end of the body than the first end of the body, the resultant upward force on pocket former 10 may be greater than the downward force applied to handle 103. In some embodiments, tines 105 may extend at obtuse angle 110 relative to body 104. For example and without limitation, as depicted in
In some embodiments, body curve 107 and tines 105 are configured such that, as depicted in
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.
This application is a nonprovisional application which claims priority from U.S. provisional application No. 62/082,239, filed Nov. 20, 2014.
| Number | Date | Country | |
|---|---|---|---|
| 62082239 | Nov 2014 | US |
