Patent US3175841A successfully refreshed from Google Patents.
US3175841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer suspension
Assignee: Individual
•
Filing: 1963-04-01
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Granted: 1965-03-30
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Expires: 1983-04-01
Abstract
No abstract record available.
Inventors
- 👤 Otho W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:22
CPC Classifications
B; B62; B62D; B62D61/00; B62D61/12; B62D61/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN COMBINATION WITH A HEAVY DUTY VEHICLE TRAILER, A DUAL AXLE TRUCK SUPPORTING THE REAR END OF SAID TRAILER, WHEELS CARRIED BY SUCH AXLE, MEANS PIVOTALLY MOUNTING SAID TRUCK TRANSVERSELY ACROSS THE TRAILER BETWEEN THE DUAL AXLES THEREOF, MEANS FOR TILTING SAID TRUCK ABOUT SAID PIVOTAL MOUNTING MEANS FOR SELECTIVELY RAISING EITHER OF SAID DUAL AXLES TO LIFT THE ASSOCIATED WHEELS CLEAR OF THE GROUND, SAID LAST-MENTIONED MEANS INCLUDING A BOLSTER EXTENDING TRANSVERSELY ACROSS EACH END OF SAID TRUCK, EXPANSIBLE MEANS POSITIONED BETWEEN EACH BOLSTER AND THE UNDERSIDE OF SAID TRAILER, CONTROLLABLE MEANS FOR SELECTIVELY EXPANDING THE EXPANSIBLE MEANS POSITIONED BETWEEN EACH BOLSTER AND THE UNDERSIDE OF SAID TRAILER, CONTROLLABLE MEANS FOR SELECTIVELY EXPANDING THE EXPANSIBLE MEANS CARRIED BY ONE OR THE OTHER OF SAID BOLSTERS FOR TILTING SAID TRUCK, SAID EXPANSIBLE MEANS COMPRISING RESILIENT AIR BAG MEANS ON EACH BOLSTER, PNEUMATIC LINES EXTENDING TO EACH AIR BAG MEANS, AND VALVE MEANS FOR CONTROLLING EACH PNEUMATIC LINE.
Claim 2
Dependent Claim
157 words
IN COMBINATION WITH A HEAVY DUTY VEHICLE TRAILER, A DUAL AXLE TRUCK SUPPORTING THE REAR END OF SAID TRAILER, WHEELS CARRIED BY SUCH AXLE, MEANS PIVOTALLY MOUNTING SAID TRUCK TRANSVERSELY ACROSS THE TRAILER BETWEEN THE DUAL AXLES THEREOF, MEANS FOR TILTING SAID TRUCK ABOUT SAID PIVOTAL MOUNTING MEANS FOR SELECTIVELY RAISING EITHER OF SAID DUAL AXLES TO LIFT THE ASSOCIATED WHEELS CLEAR OF THE GROUND, SAID LAST-MENTIONED MEANS INCLUDING A BOLSTER EXTENDING TRANSVERSELY ACROSS EACH END OF SAID TRUCK, EXPANSIBLE MEANS POSITIONED BETWEEN EACH BOLSTER AND THE UNDERSIDE OF SAID TRAILER, CONTROLLABLE MEANS FOR SELECTIVELY EXPANDING THE EXPANSIBLE MEANS POSITIONED BETWEEN EACH BOLSTER AND THE UNDERSIDE OF SAID TRAILER, CONTROLLABLE MEANS FOR SELECTIVELY EXPANDING THE EXPANSIBLE MEANS CARRIED BY ONE OR THE OTHER OF SAID BOLSTERS FOR TILTING SAID TRUCK, SAID EXPANSIBLE MEANS COMPRISING RESILIENT AIR BAG MEANS ON EACH BOLSTER, PNEUMATIC LINES EXTENDING TO EACH AIR BAG MEANS, AND VALVE MEANS FOR CONTROLLING EACH PNEUMATIC LINE.
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |