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US4058188A
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US
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Mechanical shock-absorbing device
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1974-02-28
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Granted: 1977-11-15
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Expires: 1994-02-28
Abstract
Abstract The shock-absorbing device consists of a plate, a cylindrical ring or an annular ring in which circular holes are formed in uniformly spaced relation so that the same cross-section of constituent material is present in all directions of application of forces during the shock impact.
Inventors
- 👤 Bernard Vrillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:28
CPC Classifications
F; F16; F16F; F16F7/00; F16F7/12; G; G21; G21C; G21C7/00; G21C7/06; G21C7/08; G21C7/20; F16F2230/00; F16F2230/36; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
A mechanical shock-absorbing device comprising a metal cylindrical ring, an axis for said ring, an internal diameter for said ring, an external diameter for said ring, a height for said ring along said axis, said internal and external diameters defining the thickness of said cylindrical ring which is the difference between said diameters, said internal and external diameters being constant along said height of said cylindrical ring, said thickness being on the order of one-sixth of said external diameter and a plurality of circular orifices in and over the surface of said cylindrical ring, said circular orifices being so disposed in circles on said ring that there is the same cross-section of metal along each generator line of said cylindrical ring.
Claim 2
Dependent Claim
121 words
A mechanical shock-absorbing device comprising a metal cylindrical ring, an axis for said ring, an internal diameter for said ring, an external diameter for said ring, a height for said ring along said axis, said internal and external diameters defining the thickness of said cylindrical ring which is the difference between said diameters, said internal and external diameters being constant along said height of said cylindrical ring, said thickness being on the order of one-sixth of said external diameter and a plurality of circular orifices in and over the surface of said cylindrical ring, said circular orifices being so disposed in circles on said ring that there is the same cross-section of metal along each generator line of said cylindrical ring.
Claim 3
Dependent Claim
21 words
A shock-absorbing device according to claim 1, wherein the circles on which the circular orifices are disposed are in equidistant relation.
Claim 4
Dependent Claim
29 words
A shock-absorbing device according to claim 2, wherein the orifices which are located on the same generator-line of the cylindrical ring have centers which are located on alternate circles.
Claim 5
Dependent Claim
50 words
A shock-absorbing device according to claim 2, wherein the distance between the centers of two adjacent orifices located on the same circle is substantially equal to the distance between the center of an orifice located on one circle and the center of the nearest orifice located on the adjacent circle.
Claim 6
Dependent Claim
39 words
A shock-absorbing device according to claim 1, wherein said device is made of a metal which is capable of undergoing substantial deformation prior to failure and selected from the group comprising the mild steels and the austenitic stainless steels.
Claim 7
Dependent Claim
14 words
A shock-absorbing device according to claim 5, wherein said device is made of aluminum.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |