US3262138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-tapered spring assembly
Assignee: Union Carbide Corp
•
Filing: 1964-03-03
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Granted: 1966-07-26
•
Expires: 1984-03-03
Abstract
No abstract record available.
Inventors
- 👤 Richard R Knittel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:33
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/047; A47C27/00; A47C27/04; A47C27/06; Y; Y10; Y10S; Y10S297/00; Y10S297/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A RESILIENT LOAD SUPPORTING DEVICE COMPRISING A PLURALITY OF RESILIENT VENTED BELLOWS SPRINGS ARRANGED IN AN INTERMESHED PATTERJ AND A COVER SUBSTANTIALLY ENCLOSING SAID BELLOWS SPRINGS, EACH OF THE BELLOWS SPRINGS HAVING A TAPERED CONFIGURATION, ONE PORTION OF SPRINGS HAVING A TAPER CONVERGING OUTWARDLY FROM AN INTERMEDIATE PORTION TOWARDS THE END, ANOTHER PORTION OF SPRINGS HAVING A TAPER DIVERGING OUTWARDLY FROM AN INTERMEDIATE PORTION TOWARDS THE ENDS AND EACH SPRING IN SAID ONE PORTION OF SPRINGS INTERMESHING WITH AT LEAST ONE SPRING IN SAID ANOTHER PORTION OF SPRINGS THEREBY CAUSING SAID SPRINGS TO ACT COOPERATIVELY AND EXPAND RADIALLY OVER A REACTION ZONE WHEN A LOAD IS APPLIED TO AT LEAST ONE OF THE SPRINGS IN SAID ZONE.
Claim 2
Dependent Claim
117 words
A RESILIENT LOAD SUPPORTING DEVICE COMPRISING A PLURALITY OF RESILIENT VENTED BELLOWS SPRINGS ARRANGED IN AN INTERMESHED PATTERJ AND A COVER SUBSTANTIALLY ENCLOSING SAID BELLOWS SPRINGS, EACH OF THE BELLOWS SPRINGS HAVING A TAPERED CONFIGURATION, ONE PORTION OF SPRINGS HAVING A TAPER CONVERGING OUTWARDLY FROM AN INTERMEDIATE PORTION TOWARDS THE END, ANOTHER PORTION OF SPRINGS HAVING A TAPER DIVERGING OUTWARDLY FROM AN INTERMEDIATE PORTION TOWARDS THE ENDS AND EACH SPRING IN SAID ONE PORTION OF SPRINGS INTERMESHING WITH AT LEAST ONE SPRING IN SAID ANOTHER PORTION OF SPRINGS THEREBY CAUSING SAID SPRINGS TO ACT COOPERATIVELY AND EXPAND RADIALLY OVER A REACTION ZONE WHEN A LOAD IS APPLIED TO AT LEAST ONE OF THE SPRINGS IN SAID ZONE.
References Cited (Backward Citations)
US755729A
Cited
US1648951A
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US2150747A
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US2350711A
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FR914505A
Cited
US2979739A
Cited
US3111344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |