US5551673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin shock absorber
Assignee: Toyobo Co Ltd
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Filing: 1994-12-06
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Granted: 1996-09-03
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Expires: 2014-12-06
Abstract
Abstract A resin shock absorber comprising a compression deformable portion made of a resin having a flexural modulus of elasticity of 500 to 20,000 kg/cm2, said shock absorber having a yield strength of 2 to 25 kN/m2 and a compressive energy absorption efficiency of 50% or higher. The shock absorber of the present invention has a high energy absorption efficiency for its reaction force, superior restorability, and is maintenance-free since the absorber has resistance against corrosion, water and weather. Therefore, the absorber is applicable to the use in the sea, on the ground, as well as above the ground. Furthermore, the shock absorber can be easily extended on demand into a block shock absorber, which is light in weight and simple in structure and capable of exhibiting uniform cushion characteristics over an extended area.
Inventors
- 👤 Hironobu Furusawa
- 👤 Tokio Kokubu
- 👤 Sakashi Kamata
- 👤 Hitoshi Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:21
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; F; F16; F16F; F16F7/00; F16F7/12; F16F7/121; B60; B60R; B60R19/00; B60R19/02; F16F1/00; F16F1/36; F16F1/37; F16F3/00; F16F3/08; F16F3/087; F16F3/0873; F16F3/0876
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
A resin shock absorber comprising a compression deformable portion made from a resin having a flexural modulus of elasticity of 500-20,000 kg/cm 2 , said shock absorber having a yield strain of 2-25 kN/m 2 and a compressive energy absorption efficiency of 50% or higher, wherein said shock absorber includes an impact application side, wherein said compression deformable portion has a yield point at a compressive strain of 20% or lower, wherein said shock absorber comprises a plurality of corrugated, long shock absorber strips of a specific width, said corrugated, long shock absorber strips including a plurality of slant portions defining a plurality of alternating convexes and concaves, wherein said convexes and concaves are arranged in such a way that said convexes and concaves form a checkered pattern when seen from the impact application side, said plurality of shock absorber strips being connected integrally with one another at the vertical center of the slant portion of the strips where the strips come into contact with each other.
Claim 2
Dependent Claim
167 words
A resin shock absorber comprising a compression deformable portion made from a resin having a flexural modulus of elasticity of 500-20,000 kg/cm 2 , said shock absorber having a yield strain of 2-25 kN/m 2 and a compressive energy absorption efficiency of 50% or higher, wherein said shock absorber includes an impact application side, wherein said compression deformable portion has a yield point at a compressive strain of 20% or lower, wherein said shock absorber comprises a plurality of corrugated, long shock absorber strips of a specific width, said corrugated, long shock absorber strips including a plurality of slant portions defining a plurality of alternating convexes and concaves, wherein said convexes and concaves are arranged in such a way that said convexes and concaves form a checkered pattern when seen from the impact application side, said plurality of shock absorber strips being connected integrally with one another at the vertical center of the slant portion of the strips where the strips come into contact with each other.
Claim 3
Dependent Claim
21 words
The resin shock absorber of claim 1, wherein reinforcing frames are integrally installed on the side of the convexes and concaves.
Claim 4
Dependent Claim
24 words
The resin shock absorber of claim 1, wherein a tensile break elongation of the resin forming the compression deformable portion is 30% or higher.
Claim 5
Dependent Claim
38 words
A resin shock absorber according to claim 1, wherein said resin shock absorber deforms by 50% or more under a compressive load in the height direction, and recovers to 90% or more of the original height when unloaded.
References Cited (Backward Citations)
US3506295A
Cited
US3879025A
Cited
US3995901A
Cited
JPH0253023A
Cited
US5280890A
Cited
US5409200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-03 | 2000-03-04 | 2000-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-03 | 2004-03-04 | 2004-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-03 | 2008-03-04 | 2008-09-03 | $7700.00 | Window Closed / Lapsed |