US3096086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sinuous wire spring
Assignee: Kay Manufacturing Corp
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Filing: 1961-05-18
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Granted: 1963-07-02
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Expires: 1981-05-18
Abstract
No abstract record available.
Inventors
- 👤 Edwin G Krakauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:32
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/28; A47C7/30; B; B60; B60N; B60N2/00; B60N2/70; B60N2/7023; B60N2/7035; B60N2/7047; B60N2/7058; F; F16; F16F; F16F1/00; F16F1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
230 words
A SPRING STRUCTURE COMPRISING A FRAME HAVING A PAIR OF SPACED APART RAILS, A PRE-STRESSED SINUOUS WIRE SPRING HAVING CROSS BARS CONNECTED BY LOOPS AND HAVING A MAIN PORTION INITIALLY SET ON AN ARC OF RELATIVELY SMALL UNIFORM RADIUS AND EXTENDED INTO AN ARC OF GREATER RADIUS, SAID SPRING BRIDGING THE SPACE BETWEEN RAILS, PROFILE-RAISING AND SPRING-SOFTENING MEANS ADJACENT THE REAR END OF THE SPRING TO COMPEL SAID END TO SWING READILY INWARDLY WHEN LOADED AND THEREBY TO CHANGE THE PROFILE OF SAID END FROM CONVEX UPWARDLY TO CONCAVE UPWARDLY WHEN THE SPRING IS LOADED, WHILE MAINTAINING SUBSTANTIALLY CONSTANT THE ANGLE BETWEEN THE LEG AND THE ADJACENT PART OF THE MAIN PORTION, SAID MEANS COMPRISING A RELATIVELY SHORT STIFF LEG AT SAID END ARRANGED AT AN INTERIOR ANGLE OF LESS THAN 180* TO THE ADJACENT PART OF THE MAIN PORTION, THERE BEING A COMMON CROSS BAR AT ONE END OF THE LEG AND THE MAIN PORTION, AND A SECOND CROSS BAR AT THE OTHER END OF THE LEG CONSTITUTING A FULCRUM ABOUT WHICH THE REMAINDER OF THE LEG AND THE ADJACENT PART OF THE MAIN PORTION ARE SWINGABLE AS A UNIT, MEANS PIVOTALLY SECURING THE SECOND CROSS BAR OF THE LEG TO ONE RAIL, THE SPRING HAVING A RELATIVELY SHORT STIFFENING BEND ADJACENT THE FRONT END THEREOF, AND MEANS SECURING THE FRONT END OF THE SPRING TO THE OTHER RAIL.
Claim 2
Dependent Claim
230 words
A SPRING STRUCTURE COMPRISING A FRAME HAVING A PAIR OF SPACED APART RAILS, A PRE-STRESSED SINUOUS WIRE SPRING HAVING CROSS BARS CONNECTED BY LOOPS AND HAVING A MAIN PORTION INITIALLY SET ON AN ARC OF RELATIVELY SMALL UNIFORM RADIUS AND EXTENDED INTO AN ARC OF GREATER RADIUS, SAID SPRING BRIDGING THE SPACE BETWEEN RAILS, PROFILE-RAISING AND SPRING-SOFTENING MEANS ADJACENT THE REAR END OF THE SPRING TO COMPEL SAID END TO SWING READILY INWARDLY WHEN LOADED AND THEREBY TO CHANGE THE PROFILE OF SAID END FROM CONVEX UPWARDLY TO CONCAVE UPWARDLY WHEN THE SPRING IS LOADED, WHILE MAINTAINING SUBSTANTIALLY CONSTANT THE ANGLE BETWEEN THE LEG AND THE ADJACENT PART OF THE MAIN PORTION, SAID MEANS COMPRISING A RELATIVELY SHORT STIFF LEG AT SAID END ARRANGED AT AN INTERIOR ANGLE OF LESS THAN 180* TO THE ADJACENT PART OF THE MAIN PORTION, THERE BEING A COMMON CROSS BAR AT ONE END OF THE LEG AND THE MAIN PORTION, AND A SECOND CROSS BAR AT THE OTHER END OF THE LEG CONSTITUTING A FULCRUM ABOUT WHICH THE REMAINDER OF THE LEG AND THE ADJACENT PART OF THE MAIN PORTION ARE SWINGABLE AS A UNIT, MEANS PIVOTALLY SECURING THE SECOND CROSS BAR OF THE LEG TO ONE RAIL, THE SPRING HAVING A RELATIVELY SHORT STIFFENING BEND ADJACENT THE FRONT END THEREOF, AND MEANS SECURING THE FRONT END OF THE SPRING TO THE OTHER RAIL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |