US3145984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single taper leaf spring
Assignee: Rockwell-Standard Corp
•
Filing: 1962-07-05
•
Granted: 1964-08-25
•
Expires: 1982-07-05
Abstract
No abstract record available.
Inventors
- 👤 William A Hallam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:38
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/18; F16F1/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A VEHICLE LEAF SPRING CONSISTING ENTIRELY OF A ROLLED STEEL SINGLE SPRING LEAF THAT IS OF CONSTANT WIDTH FROM END TO END HAS A GENERALLY CENTRAL PORTION OF MINOR LENGTH PROVIDING MEANS FOR ATTACHMENT TO AXLE STRUCTURE OR THE LIKE, AND IS OF CONTINUALLY DECREASING THICKNESS TAPERING FROM SAID CENTRAL PORTION TO BOTH OF SAID ENDS, SAID SPRING LEAF BEING OF CONSTANT THICKNESS IN LATERAL CROSS-SECTION BETWEEN ITS LONGITUDINAL EDGES AT ALL POINTS ALONG ITS LENGTH AND HAVING ONE SIDE FORMED WITH SURFACES OF SUBSTANTIALLY PARABOLIC CONTOUR LONGITUDINALLY FROM SAID CENTRAL PORTION TO SAID ENDS, AND SAID SURFACES BEING FORMED BY ROLLING WITH A THICKNESS TOLERANCE AT ALL LONGITUDINAL LOCATIONS ALONG THE TAPERED PORTIONS OF PLUS OR MINUS 0.005 INCH FROM A THEORETICAL DESIRED SUBSTANTIALLY PARABOLIC CONTOUR.
Claim 2
Dependent Claim
127 words
A VEHICLE LEAF SPRING CONSISTING ENTIRELY OF A ROLLED STEEL SINGLE SPRING LEAF THAT IS OF CONSTANT WIDTH FROM END TO END HAS A GENERALLY CENTRAL PORTION OF MINOR LENGTH PROVIDING MEANS FOR ATTACHMENT TO AXLE STRUCTURE OR THE LIKE, AND IS OF CONTINUALLY DECREASING THICKNESS TAPERING FROM SAID CENTRAL PORTION TO BOTH OF SAID ENDS, SAID SPRING LEAF BEING OF CONSTANT THICKNESS IN LATERAL CROSS-SECTION BETWEEN ITS LONGITUDINAL EDGES AT ALL POINTS ALONG ITS LENGTH AND HAVING ONE SIDE FORMED WITH SURFACES OF SUBSTANTIALLY PARABOLIC CONTOUR LONGITUDINALLY FROM SAID CENTRAL PORTION TO SAID ENDS, AND SAID SURFACES BEING FORMED BY ROLLING WITH A THICKNESS TOLERANCE AT ALL LONGITUDINAL LOCATIONS ALONG THE TAPERED PORTIONS OF PLUS OR MINUS 0.005 INCH FROM A THEORETICAL DESIRED SUBSTANTIALLY PARABOLIC CONTOUR.
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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |