US3301351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy absorbing device
Assignee: ARA Inc
•
Filing: 1964-12-16
•
Granted: 1967-01-31
•
Expires: 1984-12-16
Abstract
No abstract record available.
Inventors
- 👤 David L Platus
- 👤 Patrick J Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:07
CPC Classifications
F; F16; F16F; F16F7/00; F16F7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
AN ENERGY ABSORBING DEVICE COMPRISING: A TUBULAR WORKING ELEMENT COMPRISING A NON-ELASTOMERIC MATERIAL; OPPOSED MEMBERS HAVING OPPOSED SURFACES FRICTIONALLY ENGAGING THE PERIPHERY OF SAID WORKING ELEMENT; MEANS HOLDING SAID OPPOSED MEMBERS SO SPACED THAT THEY PARTIALLY FLATTEN SAID TUBULAR WORKING ELEMENT SUFFICIENTLY TO RADIALLY BEND AND STRESS DIFFERENT PORTIONS OF THE MATERIAL THEREOF BEYOND THEIR ELASTIC LIMITS, IN TENSION AND COMPRESSION, RESPECTIVELY; AND MOVING MEANS FOR RELATIVELY MOVING SAID MEMBERS, WHILE MAINTAINING THEIR SPACING, SO THAT SAID SURFACES CAUSE SAID TUBULAR ELEMENT TO ROLL ABOUT ITS TUBE AXIS AND THEREBY TO CYCLICALLY STRESS EACH PORTION OF THE MATERIAL THEREOF IN COMPRESSION AND TENSION, ALTERNATELY, BEYOND ITS ELASTIC LIMIT WHEREBY PLASTIC DEFORMATION THEREOF ABSORBS THE ENERGY IMPARTED TO SAID MEMBERS TO RELATIVELY MOVE THE SAME.
Claim 2
Dependent Claim
124 words
AN ENERGY ABSORBING DEVICE COMPRISING: A TUBULAR WORKING ELEMENT COMPRISING A NON-ELASTOMERIC MATERIAL; OPPOSED MEMBERS HAVING OPPOSED SURFACES FRICTIONALLY ENGAGING THE PERIPHERY OF SAID WORKING ELEMENT; MEANS HOLDING SAID OPPOSED MEMBERS SO SPACED THAT THEY PARTIALLY FLATTEN SAID TUBULAR WORKING ELEMENT SUFFICIENTLY TO RADIALLY BEND AND STRESS DIFFERENT PORTIONS OF THE MATERIAL THEREOF BEYOND THEIR ELASTIC LIMITS, IN TENSION AND COMPRESSION, RESPECTIVELY; AND MOVING MEANS FOR RELATIVELY MOVING SAID MEMBERS, WHILE MAINTAINING THEIR SPACING, SO THAT SAID SURFACES CAUSE SAID TUBULAR ELEMENT TO ROLL ABOUT ITS TUBE AXIS AND THEREBY TO CYCLICALLY STRESS EACH PORTION OF THE MATERIAL THEREOF IN COMPRESSION AND TENSION, ALTERNATELY, BEYOND ITS ELASTIC LIMIT WHEREBY PLASTIC DEFORMATION THEREOF ABSORBS THE ENERGY IMPARTED TO SAID MEMBERS TO RELATIVELY MOVE THE SAME.
References Cited (Backward Citations)
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Cited
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US2910246A
Cited
US3031034A
Cited
US3034597A
Cited
US3160233A
Cited
US3231049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |