US3735665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable screw anchoring device and a spacing member therefor
Assignee: Individual
•
Filing: 1971-03-15
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Granted: 1973-05-29
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Expires: 1991-03-15
Abstract
Abstract An expandable screw anchoring device for fastening recessed or concavely shaped members, such as sectional iron members, to a wall or plate. The anchoring device comprises a spacing member to be positioned between the wall surface and the concavely shaped side of the member to be fastened, in order to prevent the anchoring device be partly drawn out of the bored hole in the wall when the screw cooperating with the anchoring device is tightened. According to the invention the spacing member is shaped in such a manner and/or made from such a material that it is axially deformable so that the length of the spacing member will automatically be adjusted to the ''''rise of arch'''' of the concavely shaped member when the screw is tightened. Thus, anchoring devices with spacing members having one and the same length may be used for fastening members having different ''''rise of arch.
Inventors
- 👤 L Mortensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:50
CPC Classifications
F; F16; F16B; F16B13/00; F16B13/04; F16B13/045; F16B13/06; F16B13/061
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
211 words
An expandable anchoring device for fastening a recessed member to a wall with the recessed side of said member facing the wall, said anchoring device comprising: anchoring means insertable into a hole formed in the wall during use of the device and including an elongated deformable portion radial expandable into engagement with the surface portion of the wall which defines said hole in response to axial compression of said portion for anchoring said device to the wall; fastening means extendable through said recessed member and cooperative with said anchoring means to axially compress said deformable portion and radially expand the latter within said hole when said fastening means is tightened to fasten said recessed member to the waLl with the recessed side thereof facing the wall; abutment means connected to said anchoring means for abutting with the wall to limit the extent of insertion of said anchoring means into said hole; and a spacing member replaceably inserted through said abutment means into the interior of said anchoring means and engageable with the inside surface of said recessed member to position said recessed member relative to the wall and to prevent said anchoring means from being drawn out of the hole when said fastening means is tightened to expand said anchoring means.
Claim 2
Dependent Claim
211 words
An expandable anchoring device for fastening a recessed member to a wall with the recessed side of said member facing the wall, said anchoring device comprising: anchoring means insertable into a hole formed in the wall during use of the device and including an elongated deformable portion radial expandable into engagement with the surface portion of the wall which defines said hole in response to axial compression of said portion for anchoring said device to the wall; fastening means extendable through said recessed member and cooperative with said anchoring means to axially compress said deformable portion and radially expand the latter within said hole when said fastening means is tightened to fasten said recessed member to the waLl with the recessed side thereof facing the wall; abutment means connected to said anchoring means for abutting with the wall to limit the extent of insertion of said anchoring means into said hole; and a spacing member replaceably inserted through said abutment means into the interior of said anchoring means and engageable with the inside surface of said recessed member to position said recessed member relative to the wall and to prevent said anchoring means from being drawn out of the hole when said fastening means is tightened to expand said anchoring means.
Claim 3
Dependent Claim
58 words
An expandable anchoring device according to claim 1, wherein said abutment means and said spacing member are totally contained within the recess of said recessed member such that said spacing member and said abutment means fill in the gap adjacent said fastening means between the inside surface of said recessed member and the surface of the or wall.
Claim 4
Dependent Claim
20 words
An expandable anchoring device according to claim 1, wherein said abutment means and spacing means comprise a one-piece integral unit.
Claim 5
Dependent Claim
75 words
An anchoring device according to claim 1, wherein said anchoring means comprises a tubular anchoring member having means in one part defining longitudinally extending helical slits, said spacing member being formed integrally with the remaining part of the tubular anchoring member and having an outer diameter exceeding the outer diameter of said remaining part, said helical slits or slots continuing through the spacing member as channel-shaped grooves at the inner wall of the spacing member.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |