Patent US3272491A successfully refreshed from Google Patents.
US3272491A
Expired / Lapsed
US
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Resilient spring
Assignee: Union Carbide Corp
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Filing: 1964-03-03
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Granted: 1966-09-13
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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
2026-11-08 19:00
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/047; A47C4/00; A47C4/54; B; B60; B60N; B60N2/00; B60N2/70; B60N2/7023; B60N2/7035; B60N2/7047; B60N2/7082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A SPRING COMPRISING AN UNDULATING MEMBER HAVING RESILIENT LEG SECTIONS AND RESILIENT JUNCTURE SECTIONS BETWEEN ADJACENT LEG SECTIONS, THE JUNCTURES HAVING ALTERNATING ROUNDED, ARCUATE CONFIGURATIONS AND SHARP CONFIGURATIONS, SAID ROUNDED CONFIGURATIONS HAVING THE ARC EXTENDING OVER A SUBSTANTIAL PORTION OF THE CONVOLUTION, THE CROSS SECTIONAL AREA OF THE MEMBER AT THE SHARP CONFIGURATION BEING SUBSTANTIALLY GREATER THAN THE CROSS-SECTIONAL AREA OF THE MEMBER AT THE ROUNDED JUNCTURE, SAID LEG SECTIONS BEING SUBSTANTIALLY STRAIGHT AND INCLINED AND THE CROSS-SECTIONAL AREA OF THE LEG SECTIONS DECREASING UNIFORMLY OVER THEIR LENGTH FROM THICK, SHARP JUNCTURE, TO THE THIN ROUNDED JUNCTURE.
Claim 2
Dependent Claim
97 words
A SPRING COMPRISING AN UNDULATING MEMBER HAVING RESILIENT LEG SECTIONS AND RESILIENT JUNCTURE SECTIONS BETWEEN ADJACENT LEG SECTIONS, THE JUNCTURES HAVING ALTERNATING ROUNDED, ARCUATE CONFIGURATIONS AND SHARP CONFIGURATIONS, SAID ROUNDED CONFIGURATIONS HAVING THE ARC EXTENDING OVER A SUBSTANTIAL PORTION OF THE CONVOLUTION, THE CROSS SECTIONAL AREA OF THE MEMBER AT THE SHARP CONFIGURATION BEING SUBSTANTIALLY GREATER THAN THE CROSS-SECTIONAL AREA OF THE MEMBER AT THE ROUNDED JUNCTURE, SAID LEG SECTIONS BEING SUBSTANTIALLY STRAIGHT AND INCLINED AND THE CROSS-SECTIONAL AREA OF THE LEG SECTIONS DECREASING UNIFORMLY OVER THEIR LENGTH FROM THICK, SHARP JUNCTURE, TO THE THIN ROUNDED JUNCTURE.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |