US3079139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapered spring leaf
Assignee: Rockwell-Standard Corp
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Filing: 1960-04-20
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Granted: 1963-02-26
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Expires: 1980-04-20
Abstract
No abstract record available.
Inventors
- 👤 Robert R Greene
- 👤 Frederick T Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:30
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
A SINGLE LEAF SPRING CONSISTING ESSENTIALLY OF A SINGLE LENGTH OF SPRING METAL HAVING A RELATIVELY SHORT SPRING SEAT SECTION ADAPTED TO BE SECURED TO A VEHICLE AXLE AND TWO OPPOSITELY EXTENDING ACCURATELY FORMED CONSIDERABLY LONGER TAPERED SECTIONS THAT EXTEND FROM SAID SPRING SEAT SECTION TO TERMINALS FOR ATTACHMENT TO A RELATIVELY MOVABLE VEHICLE PART, SAID TAPERED SECTIONS BEING OF SUBSTANTIALLY PARABOLIC LONGITUDINAL CONTOUR AND OF GRADUALLY DECREASING THICKNESS FROM THEIR JUNCTURES WITH SAID SPRING SEAT SECTION TOWARD SAID TERMINALS, AND SAID SPRING SEAT SECTION BEING SO APPRECIABLY THICKER THAN ANY PORTION OF SAID TAPERED SECTIONS AS TO PROVIDE ABRUPT CHANGES IN METAL THICKNESS AT SAID JUNCTURES.
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |