High performance, reinforced insulated precast concrete and tilt-up concrete structures and methods of making same
US-2017370101-A1 · Dec 28, 2017 · US
Undercut anchor
US12398555B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12398555-B2 |
| Application number | US-202117643323-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 8, 2021 |
| Priority date | Dec 8, 2021 |
| Publication date | Aug 26, 2025 |
| Grant date | Aug 26, 2025 |
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- Title
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Abstract
Official abstract text for this publication.
An undercut anchor having an at least partially threaded rod portion having an outer thread diameter D ROD . The anchor having an expansion feature coupled to the rod portion and an expansion sleeve having an outer diameter D OUTER SLEEVE , an inner diameter D INNER SLEEVE and a wall thickness T SLEEVE . Furthermore, the expansion sleeve has a plurality of circumferentially distributed fingers which are configured to flex outwards when a ramp portion of length L RAMP of each of the respective fingers is forced against the expansion feature during installation of the undercut anchor. The fingers each having a length L FINGER and a distance therebetween of W SLOT .
First claim
Opening claim text (preview).
What is claimed is: 1. An undercut anchor comprising: an at least partially threaded rod portion having an outer thread diameter D ROD ; an expansion feature coupled to the rod portion; an expansion sleeve having an outer diameter D OUTER SLEEVE , an inner diameter D INNER SLEEVE and a wall thickness T SLEEVE wherein the expansion sleeve has a plurality of circumferentially distributed fingers which are configured to flex outwards when a ramp portion of length L RAMP of each of the respective fingers is forced against the expansion feature during installation of the undercut anchor, the fingers each having a length L FINGER and a distance therebetween of W SLOT ; wherein the undercut anchor is configured according to at least one of the following: the ratio of D OUTER SLEEVE to D ROD is between 1.50 to 2.00; the ratio of D INNER SLEEVE to D ROD is between 1.00 to 1.15; the ratio of T SLEEVE to D ROD is between 0.25 to 0.50; the ratio of L FINGER to D ROD is between 1.00 to 1.50; the ratio of L RAMP to D ROD is between 0.15 to 0.30; the ratio of W SLOT to D ROD is between 0.05 to 0.20, and wherein the plurality of circumferentially distributed fingers are flexed outward to form an expansion angle between about 37° to about 43°, the undercut anchor configured to the following dimensions: D ROD (Inches) 0.375 D OUTER SLEEVE (Inches) 0.6875 D INNER SLEEVE (Inches) 0.405 T SLEEVE (Inches) 0.14125 L FINGER (Inches) 0.495 L RAMP (Inches) 0.075 W SLOT (Inches) 0.055. 2. An undercut anchor comprising: an at least partially threaded rod portion having an outer thread diameter D ROD ; an expansion feature coupled to the rod portion; an expansion sleeve having an outer diameter D OUTER SLEEVE , an inner diameter D INNER SLEEVE and a wall thickness T SLEEVE wherein the expansion sleeve has a plurality of circumferentially distributed fingers which are configured to flex outwards when a ramp portion of length L RAMP of each of the respective fingers is forced against the expansion feature during installation of the undercut anchor, the fingers each having a length L FINGER and a distance therebetween of W SLOT ; wherein the undercut anchor is configured according to at least one of the following: the ratio of D OUTER SLEEVE to D ROD is between 1.50 to 2.00; the ratio of D INNER SLEEVE to D ROD is between 1.00 to 1.15; the ratio of T SLEEVE to D ROD is between 0.25 to 0.50; the ratio of L FINGER to D ROD is between 1.00 to 1.50; the ratio of L RAMP to D ROD is between 0.15 to 0.30; the ratio of W SLOT to D ROD is between 0.05 to 0.20, and wherein the plurality of circumferentially distributed fingers are flexed outward to form an expansion angle between about 37° to about 43°, the undercut anchor configured to the following dimensions: D ROD (Inches) 0.5 D OUTER SLEEVE (Inches) 0.8125 D INNER SLEEVE (Inches) 0.535 T SLEEVE (Inches) 0.13875 L FINGER (Inches) 0.532 L RAMP (Inches) 0.112 W SLOT (Inches) 0.055. 3. An undercut anchor comprising: an at least partially threaded rod portion having an outer thread diameter D ROD ; an expansion feature coupled to the rod portion; an expansion sleeve having an outer diameter D OUTER SLEEVE , an inner diameter D INNER SLEEVE and a wall thickness T SLEEVE wherein the expansion sleeve has a plurality of circumferentially distributed fingers which are configured to flex outwards when a ramp portion of length L RAMP of each of the respective fingers is forced against the expansion feature during installation of the undercut anchor, the fingers each having a length L FINGER and a distance therebetween of W SLOT ; wherein the undercut anchor is configured according to at least one of the following: the ratio of D OUTER SLEEVE to D ROD is between 1.50 to 2.00; the ratio of D INNER SLEEVE to D ROD is between 1.00 to 1.15; the ratio of T SLEEVE to D ROD is between 0.25 to 0.50; the ratio of L FINGER to D ROD is between 1.00 to 1.50; the ratio of L RAMP to D ROD is between 0.15 to 0.30; the ratio of W SLOT to D ROD is between 0.05 to 0.20, and wherein the plurality of circumferentially distributed fingers are flexed outward to form an expansion angle between about 37° to about 43°, the undercut anchor configured to the following dimensions: D ROD (Inches) 0.625 D OUTER SLEEVE (Inches) 1 D INNER SLEEVE (Inches) 0.665 T SLEEVE (Inches) 0.1675 L FINGER (Inches) 0.661 L RAMP (Inches) 0.149 W SLOT (Inches) 0.055. 4. An undercut anchor comprising: an at least partially threaded rod portion having an outer thread diameter D ROD ; an expansion feature coupled to the rod portion; an expansion sleeve having an outer diameter D OUTER SLEEVE , an inner diameter D INNER SLEEVE and a wall thickness T SLE
Assignees
Inventors
Classifications
with segments or fingers expanding or tilting into an undercut hole (F16B13/0858 takes precedence) · CPC title
fastened by extracting a separate expander-part, actuated by the screw, nail or the like · CPC title
combined with expanding sleeve {(F16B13/045 and F16B13/08 take precedence)} · CPC title
with extending protrusions, e.g. discs, segments, ridges, fingers or tongues (F16B13/122 takes precedence) · CPC title
fastened by inserting an unthreaded element, e.g. pin or nail (F16B13/122, F16B13/128 take precedence) · CPC title
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Frequently asked questions
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- What does patent US12398555B2 cover?
- An undercut anchor having an at least partially threaded rod portion having an outer thread diameter D ROD . The anchor having an expansion feature coupled to the rod portion and an expansion sleeve having an outer diameter D OUTER SLEEVE , an inner diameter D INNER SLEEVE and a wall thickness T SLEEVE . Furthermore, the expansion sleeve has a plurality of circumferentially distributed fingers…
- Who is the assignee on this patent?
- Black & Decker Inc
- What technology area does this patent fall under?
- Primary CPC classification E04B1/4121. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Aug 26 2025 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).