US3785241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion anchor
Assignee: Individual
•
Filing: 1971-12-03
•
Granted: 1974-01-15
•
Expires: 1991-12-03
Abstract
Abstract An expansion anchor sleeve has a leading portion and a circumferential wall which is circumferentially complete at the leading portion but subdivided into a plurality of longitudinal webs rearwardly of the leading portion. The webs each have two axially adjacent sections the first one of which extends rearwardly from the leading portion and has a greater radial thickness and the second one of which extends rearwardly from the first section and has a lesser radial thickness. At the juncture between the two sections of each web a buckling line is provided and the first portion extends radially outwardly from the longitudinal axis of the sleeve at an acute angle thereto, whereas the second portion extends in substantial parallelism with the longitudinal axis. A screw or similar means is provided for subjecting the sleeve to axial tensile forces to thereby effect radial outward buckling of the two sections of each web with reference to one another.
Inventors
- 👤 A Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/02; F16B13/00; F16B13/04; F16B13/06; F16B13/061
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
207 words
An expansion anchor, comprising an expansion anchor sleeve having a leading portion, and a circumferential wall which is circumferentially complete in the region of said leading portion and circumferentially subdivided into a plurality of longitudinal webs rearwardly of said leading portion, said webs each being of part-circular cross-section and each including a first section of a substantially constant radial thickness extending rearwardly from said leading portion at an acute angle to the longitudinal axis of said sleeve, and a second section of a substantially constant lesser radial thickness than said first section extending rearwardly from said first section in at least substantial parallelism With said longitudinal axis, said first and second sections of each web forming an abrupt juncture at which said sections are to buckle and fold radially outwardly in response to exertion of axial compressive forces and at which said thickness of said first section decreases to said lesser thickness of said second section, and each of said second sections having an end portion rearwardly spaced from said juncture and which is free of connection with the respective end portions of the other ones of said second sections; and means for engaging said leading portion and for exerting axially directed compressive forces on said sleeve.
Claim 2
Dependent Claim
207 words
An expansion anchor, comprising an expansion anchor sleeve having a leading portion, and a circumferential wall which is circumferentially complete in the region of said leading portion and circumferentially subdivided into a plurality of longitudinal webs rearwardly of said leading portion, said webs each being of part-circular cross-section and each including a first section of a substantially constant radial thickness extending rearwardly from said leading portion at an acute angle to the longitudinal axis of said sleeve, and a second section of a substantially constant lesser radial thickness than said first section extending rearwardly from said first section in at least substantial parallelism With said longitudinal axis, said first and second sections of each web forming an abrupt juncture at which said sections are to buckle and fold radially outwardly in response to exertion of axial compressive forces and at which said thickness of said first section decreases to said lesser thickness of said second section, and each of said second sections having an end portion rearwardly spaced from said juncture and which is free of connection with the respective end portions of the other ones of said second sections; and means for engaging said leading portion and for exerting axially directed compressive forces on said sleeve.
Claim 3
Dependent Claim
16 words
An expansion anchor as defined in claim 1, wherein said sleeve is of synthetic plastic material.
Claim 4
Dependent Claim
26 words
An expansion anchor as defined in claim 1, wherein the radial thickness of each web tapers at said junction from said greater to said lesser thickness.
Claim 5
Dependent Claim
34 words
An expansion anchor as defined in claim 1, said sleeve further comprising a forward portion forwardly of said leading portion and composed of at least two elongated expansible jaws adapted to be radially expanded.
Claim 6
Dependent Claim
28 words
An expansion anchor as defined in claim 1, wherein each of said end portions is provided with a flange portion extending in direction radially outwardly of said sleeve.
Claim 7
Dependent Claim
30 words
An expansion anchor as defined in claim 1; further comprising ribs provided on the outer side of said webs over at least a portion of the length of the latter.
References Cited (Backward Citations)
US2255650A
Cited
GB608218A
Cited
US2763314A
Cited
US3174387A
Cited
US3340761A
Cited
US3461771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |