US3719255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy absorbing device
Assignee: AEROSPACE RES
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Filing: 1969-04-21
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Granted: 1973-03-06
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Expires: 1989-04-21
Abstract
Abstract The device is an energy absorbing arrangement in which a flexible tube-like, energy absorbing member is confined in a space between one relatively rigid body member and another. They may deform elastically but not plastically. Relative motion between one body member and the other body member roll the tubelike in the space, and thereby absorbs energy in the rolling due to the cyclical plastic deformation or hysteretic deformation thereof, since the spacing between the one body member and the other body member is less than the unstressed and undeformed diameter of the flexible, tube-like member. A nondeformable rigid cylindrical retainer means is positioned within the flexible tube-like member to limit the radial deformation thereof to prevent stress relieving plastic flow or creep of the flexible tube-like energy absorbing member. The rigid body members may be cylindrical with an annular space between them.
Inventors
- 👤 C Daniels
- 👤 B Mazelsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:12
CPC Classifications
F; F16; F16F; F16F7/00; F16F7/12; B; B62; B62D; B62D1/00; B62D1/02; B62D1/16; B62D1/18; B62D1/19; B62D1/192; B64; B64G; B64G1/00; B64G1/22; B64G1/62; B64G1/625
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
An energy absorbing arrangement comprising, in combination: a first rigid body member and a second rigid body member spaced a preselected distance therefrom for relative motion therebetween; a tube-like deformable energy absorbing means positioned between said first and said second rigid body members having an unstressed outside diameter greater than said preselected distance, and a preselected inside diameter, and deformed in radial directions by said first and second body member, for energy absorbing rolling motion therebetween for said relative motion between said first and second rigid body member; and a cylindrical, rigid nondeformable retainer means positioned within said tube-like energy absorbing means and having a diameter less than said preselected inside diameter of said tube-like energy absorbing means, for limiting the radial deformation of said tube-like energy absorbing means to prevent stress relieving plastic flow thereof, said first and second rigid body members comprising a cylindrical body member and a plurality of outer cylindrical body members with the tube-like members captured between the inner body member and the outer cylindrical body members.
Claim 2
Dependent Claim
172 words
An energy absorbing arrangement comprising, in combination: a first rigid body member and a second rigid body member spaced a preselected distance therefrom for relative motion therebetween; a tube-like deformable energy absorbing means positioned between said first and said second rigid body members having an unstressed outside diameter greater than said preselected distance, and a preselected inside diameter, and deformed in radial directions by said first and second body member, for energy absorbing rolling motion therebetween for said relative motion between said first and second rigid body member; and a cylindrical, rigid nondeformable retainer means positioned within said tube-like energy absorbing means and having a diameter less than said preselected inside diameter of said tube-like energy absorbing means, for limiting the radial deformation of said tube-like energy absorbing means to prevent stress relieving plastic flow thereof, said first and second rigid body members comprising a cylindrical body member and a plurality of outer cylindrical body members with the tube-like members captured between the inner body member and the outer cylindrical body members.
Claim 3
Dependent Claim
172 words
An energy absorbing arrangement comprising, in combination: a first rigid body member and a second rigid body member spaced a preselected distance therefrom for relative motion therebetween; a tube-like deformable energy absorbing means positioned between said first and said second rigid body members having an unstressed outside diameter greater than said preselected distance, and a preselected inside diameter, and deformed in radial directions by said first and second body member, for energy absorbing rolling motion therebetween for said relative motion between said first and second rigid body member; and a cylindrical, rigid nondeformable retainer means positioned within said tube-like energy absorbing means and having a diameter less than said preselected inside diameter of said tube-like energy absorbing means, for limiting the radial deformation of said tube-like energy absorbing means to prevent stress relieving plastic flow thereof, said first and second rigid body members comprising a cylindrical body member and a plurality of outer cylindrical body members with the tube-like members captured between the inner body member and the outer cylindrical body members.
Claim 4
Dependent Claim
172 words
An energy absorbing arrangement comprising, in combination: a first rigid body member and a second rigid body member spaced a preselected distance therefrom for relative motion therebetween; a tube-like deformable energy absorbing means positioned between said first and said second rigid body members having an unstressed outside diameter greater than said preselected distance, and a preselected inside diameter, and deformed in radial directions by said first and second body member, for energy absorbing rolling motion therebetween for said relative motion between said first and second rigid body member; and a cylindrical, rigid nondeformable retainer means positioned within said tube-like energy absorbing means and having a diameter less than said preselected inside diameter of said tube-like energy absorbing means, for limiting the radial deformation of said tube-like energy absorbing means to prevent stress relieving plastic flow thereof, said first and second rigid body members comprising a cylindrical body member and a plurality of outer cylindrical body members with the tube-like members captured between the inner body member and the outer cylindrical body members.
Claim 5
Dependent Claim
32 words
An arrangement as in claim 1, wherein said outer body members comprise pairs of cylindrical body members spaced from the inner cylindrical body member to position to hold the tube-like members therebetween.
References Cited (Backward Citations)
US3435919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |