US3214188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for selectively deactivating a tractor pneumatic suspension
Assignee: Industrie Magneti Marelli SRL
•
Filing: 1961-06-12
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Granted: 1965-10-26
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Expires: 1981-06-12
Abstract
No abstract record available.
Inventors
- 👤 Alfieri Giuseppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:44
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/005; B60G17/02; B60G17/04; B60G17/052; Y; Y10; Y10S; Y10S280/00; Y10S280/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A TRACTOR-TRAILER PNEUMATIC SUSPENSION SYSTEM, THE COMBINATION INCLUDING A FIFTH WHEEL CARRIED BY THE TRACTOR FRAME, AIR SPRINGS MOUNTED BETWEEN THE SPRUNG AND UNSPRUNG PORTIONS OF THE TRACTOR AND POSITIONED BENEATH THE FIFTH WHEEL, AND PNEUMATICALLY CONTROLLED VALVE MEANS OPRATIVELY CONNECTED TO THE TRACTOR AIR SPRINGS FOR REDUCING THE AIR PRESSURE THEREIN TO THEREBY LOWER THE TRACTOR FRAME AND ASSOCIATED FIFTH WHEEL DURING HITCHING AND UNHITCHING OPERATIONS OF THE TRACTOR AND TRAILER.
Claim 2
Dependent Claim
73 words
IN A TRACTOR-TRAILER PNEUMATIC SUSPENSION SYSTEM, THE COMBINATION INCLUDING A FIFTH WHEEL CARRIED BY THE TRACTOR FRAME, AIR SPRINGS MOUNTED BETWEEN THE SPRUNG AND UNSPRUNG PORTIONS OF THE TRACTOR AND POSITIONED BENEATH THE FIFTH WHEEL, AND PNEUMATICALLY CONTROLLED VALVE MEANS OPRATIVELY CONNECTED TO THE TRACTOR AIR SPRINGS FOR REDUCING THE AIR PRESSURE THEREIN TO THEREBY LOWER THE TRACTOR FRAME AND ASSOCIATED FIFTH WHEEL DURING HITCHING AND UNHITCHING OPERATIONS OF THE TRACTOR AND TRAILER.
References Cited (Backward Citations)
US2733931A
Cited
US2692612A
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US2862725A
Cited
FR1201536A
Cited
FR1213614A
Cited
FR1216196A
Cited
US3121573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |