US4538702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorber for fall protection system
Assignee: DB Industries LLC
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Filing: 1983-03-21
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Granted: 1985-09-03
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Expires: 2003-03-21
Abstract
Abstract A shock absorber as designed for use in fall protection systems and may be incorporated integrally with either a belt or lanyard or may be used as a separate component in conjunction with conventional belts and lanyards. A shock absorbing mechanism of the invention utilizes a piercing member having smooth edges which pierce a piece of webbing material. When force is applied to opposite ends of the shock absorber, the piercing member stretches and breaks latitudinal fibers of the webbing material. This allows near complete retention of the strength of the longitudinal fibers as those fibers are not damaged during the absorbing operation.
Inventors
- 👤 J. Thomas Wolner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:41
CPC Classifications
A; A62; A62B; A62B35/00; A62B35/04; B; B64; B64D; B64D17/00; B64D17/22; B64D17/36; F; F16; F16F; F16F7/00; F16F7/003; F16F7/006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A shock absorber for fall protection systems, said shock absorber comprising: at least one piece of webbing having first and second ends and longitudinal and latitudinal fibers; attachment means at said first and second ends; and a smooth-edged piercing member initially piercing said webbing at first and second piercing points adjacent said first and second ends, respectively, the linear distance long the entire length of said webbing being greater than the distance between said first and second piercing points.
Claim 2
Dependent Claim
79 words
A shock absorber for fall protection systems, said shock absorber comprising: at least one piece of webbing having first and second ends and longitudinal and latitudinal fibers; attachment means at said first and second ends; and a smooth-edged piercing member initially piercing said webbing at first and second piercing points adjacent said first and second ends, respectively, the linear distance long the entire length of said webbing being greater than the distance between said first and second piercing points.
Claim 3
Dependent Claim
13 words
The shock absorber of claim 1 wherein said piercing member comprises a coil.
Claim 4
Dependent Claim
32 words
The shock absorber of claim 2 wherein said piercing member coil has first and second ends and wherein at least one portion of said webbing folded under one of said coil ends.
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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |