Clip Assembly For Use Holding Sinuous Springs
US-2016369825-A1 · Dec 22, 2016 · US
Expansion anchor with an anisotropic coefficient of friction
US9970465B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9970465-B2 |
| Application number | US-201415037452-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 18, 2014 |
| Priority date | Nov 25, 2013 |
| Publication date | May 15, 2018 |
| Grant date | May 15, 2018 |
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- Title
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Abstract
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An expansion anchor including a stud, at least one expansion element, and at least one slanted surface that is arranged on the stud and that pushes the expansion element radially outwards when the stud is moved in a pull-out direction relative to the expansion element is provided. It is provided that the coefficient of friction between the expansion element and the slanted surface is dependent on the direction.
First claim
Opening claim text (preview).
What is claimed is: 1. An expansion anchor comprising: a stud; at least one expansion element; and at least one slanted surface arranged on the stud, the slanted surface pushing the expansion element radially outwards when the stud is moved in a pull-out direction relative to the expansion element; a coefficient of friction between the expansion element and the slanted surface being dependent on a direction of movement, wherein the coefficient of friction is higher if the slanted surface is moved in the pull-out direction relative to the expansion element than if the slanted surface is moved counter to the pull-out direction relative to the expansion element. 2. The expansion anchor as recited in claim 1 wherein the coefficient of friction is 1.3 to 1.7 times higher if the slanted surface is moved in the pull-out direction relative to the expansion element than if the slanted surface is moved counter to the pull-out direction relative to the expansion element. 3. The expansion anchor as recited in claim 2 wherein the coefficient of friction is 1.5 times higher if the slanted surface is moved in the pull-out direction relative to the expansion element than if the slanted surface is moved counter to the pull-out direction relative to the expansion element. 4. The expansion anchor as recited in claim 1 wherein the expansion element is an expansion sleeve surrounding the stud at least in certain areas, and in that an expansion cone is arranged on the stud, the slanted surface being formed by the expansion cone. 5. An expansion anchor comprising: a stud; at least one expansion element; and at least one slanted surface arranged on the stud, the slanted surface pushing the expansion element radially outwards when the stud is moved in a pull-out direction relative to the expansion element; a coefficient of friction between the expansion element and the slanted surface being dependent on a direction of movement, wherein if the slanted surface is moved counter to the pull-out direction relative to the expansion element, the coefficient of friction is lower than the tangent of an angle included by the slanted surface with a longitudinal axis of the stud.
Assignees
Inventors
Classifications
fastened by extracting the screw, nail or the like · CPC title
fastened by extracting a separate expander-part, actuated by the screw, nail or the like · CPC title
- F16B2/005Primary
Means to increase the friction-coefficient · CPC title
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- What does patent US9970465B2 cover?
- An expansion anchor including a stud, at least one expansion element, and at least one slanted surface that is arranged on the stud and that pushes the expansion element radially outwards when the stud is moved in a pull-out direction relative to the expansion element is provided. It is provided that the coefficient of friction between the expansion element and the slanted surface is dependent …
- Who is the assignee on this patent?
- Hilti Ag
- What technology area does this patent fall under?
- Primary CPC classification F16B2/005. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 15 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).