Patent US4255986A successfully refreshed from Google Patents.
US4255986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for absorbing impact energy
Assignee: Toyota Motor Corp
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Filing: 1978-08-14
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Granted: 1981-03-17
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Expires: 1998-08-14
Abstract
Abstract A device for absorbing impact energy including a shaft assembly which includes a tubular member and a rod like member coupled to the tubular member such that the shaft assembly can contract, at least one orifice provided in the shaft assembly and connecting the interior of the tubular member with the exterior of the tubular member, an energy absorbing material provided in the interior of the tubular member and a receiving chamber provided on the shaft assembly adjacent the reduction whereby when impact energy is applied to the shaft assembly, the impact absorbing material flows through the orifice and is contained in the receiving chamber.
Inventors
- 👤 Makoto Mukoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:40
CPC Classifications
F; F16; F16F; F16F7/00; F16F7/12; F16F7/127; B; B62; B62D; B62D1/00; B62D1/02; B62D1/16; B62D1/18; B62D1/19; B62D1/192
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A device for absorbing impact energy comprising: a shaft assembly which comprises a tubular member and rod-like member coupled to the tubular member such that the shaft assembly can contract; at least one outer jacket made of hard material provided around the outside of said shaft assembly; an energy absorbing material made of silicone rubber provided in the interior of said tubular member; and at least one orifice provided in said tubular member which connects the interior of said outer jacket only with the interior of said tubular member whereby an impact energy is applied to said shaft assembly, the impact absorbing material is compressed and flows through the orifice and is contained in a receiving chamber formed between said outer jacket and shaft assembly, and the impact energy is absorbed.
Claim 2
Independent Claim
131 words
A device for absorbing impact energy comprising: a shaft assembly which comprises a tubular member and rod-like member coupled to the tubular member such that the shaft assembly can contract; at least one outer jacket made of hard material provided around the outside of said shaft assembly; an energy absorbing material made of silicone rubber provided in the interior of said tubular member; and at least one orifice provided in said tubular member which connects the interior of said outer jacket only with the interior of said tubular member whereby an impact energy is applied to said shaft assembly, the impact absorbing material is compressed and flows through the orifice and is contained in a receiving chamber formed between said outer jacket and shaft assembly, and the impact energy is absorbed.
Claim 3
Independent Claim
135 words
A device for absorbing impact energy comprising: a shaft assembly which comprises a tubular member and a rod-like member coupled to the tubular member such that the shaft assembly can contract; at least one outer jacket made of hard material provided around the outside of said rod-like member; an energy absorbing material provided in the interior of said tubular member; and at least one passage drilled through the approximate center of said rod-like member which connects the interior of said outer jacket only with the interior of said tubular member whereby an impact energy is applied to said shaft assembly, said energy absorbing material is compressed and flows through said at least one passageway and is contained in a receiving chamber formed between said outer jacket and shaft assembly, and the impact energy is absorbed.
Claim 4
Independent Claim
135 words
A device for absorbing impact energy comprising: a shaft assembly which comprises a tubular member and a rod-like member coupled to the tubular member such that the shaft assembly can contract; at least one outer jacket made of hard material provided around the outside of said rod-like member; an energy absorbing material provided in the interior of said tubular member; and at least one passage drilled through the approximate center of said rod-like member which connects the interior of said outer jacket only with the interior of said tubular member whereby an impact energy is applied to said shaft assembly, said energy absorbing material is compressed and flows through said at least one passageway and is contained in a receiving chamber formed between said outer jacket and shaft assembly, and the impact energy is absorbed.
Claim 5
Dependent Claim
19 words
A device for absorbing impact energy according to claim 2 wherein said receiving chamber is substantially cylindrical in shape.
Claim 6
Dependent Claim
36 words
A device for absorbing impact energy according to claim 2 wherein bearings are provided between said shaft assembly and said outer jacket such that said outer jacket is free to rotate relative to said shaft assembly.
Claim 7
Dependent Claim
52 words
A device for absorbing energy according to claim 2 wherein said outer jacket comprises first outer jacket and second outer jacket which engages at one end with one end of said first outer jacket slideably such that said outer jacket can contract in the direction of the axis of said shaft assembly.
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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |