US3253840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic lift system for a tractortrailer hitch
Assignee: OLE GRANNING TRAILER SERVICE Inc
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Filing: 1964-04-23
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Granted: 1966-05-31
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Expires: 1984-04-23
Abstract
No abstract record available.
Inventors
- 👤 Granning Ole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:05
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0807; B62D53/0821
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A TRUCK TRACTOR HAVING A FRAME, INFLATABLE BAG MEANS MOUNTED ON THE FRAME, A FIFTH WHEEL MOUNTED ON THE INFLATABLE BAG MEANS TO BE RAISED AND LOWERED THEREBY, MEANS TO INFLATE AND DEFLATE SAID BAG MEANS, RIGID DRAWBAR MEANS PIVOTALLY MOUNTED AT ONE END TO THE FIFTH WHEEL AND PIVOTALLY MOUNTED AT THE OTHER END TO THE FRAME AT A LOCATION FORWARDLY OF THE FIFTH WHEEL TO ABSORB STRESSES APPLIED TO THE FIFTH WHEEL ALONG THE LONGITUDINAL AXIS OF THE TRUCK TRACTOR, THE PIVOTAL ATTACHMENT OF SAID ONE END OF THE DRAWBAR MEANS TO THE FIFTH WHEEL INCLUDING A RESILIENT ELEMENT BETWEEN THE DRAWBAR MEANS AND THE FIFTH WHEEL TO ABSORB SHOCK STRESSES APPLIED TO THE FIFTH WHEEL, AND EXTENSIBLE TRANSVERSE SUPPORT MEANS BENEATH THE FIFTH WHEEL EXTENDING BETWEEN THE FIFTH WHEEL
Claim 2
Dependent Claim
133 words
IN A TRUCK TRACTOR HAVING A FRAME, INFLATABLE BAG MEANS MOUNTED ON THE FRAME, A FIFTH WHEEL MOUNTED ON THE INFLATABLE BAG MEANS TO BE RAISED AND LOWERED THEREBY, MEANS TO INFLATE AND DEFLATE SAID BAG MEANS, RIGID DRAWBAR MEANS PIVOTALLY MOUNTED AT ONE END TO THE FIFTH WHEEL AND PIVOTALLY MOUNTED AT THE OTHER END TO THE FRAME AT A LOCATION FORWARDLY OF THE FIFTH WHEEL TO ABSORB STRESSES APPLIED TO THE FIFTH WHEEL ALONG THE LONGITUDINAL AXIS OF THE TRUCK TRACTOR, THE PIVOTAL ATTACHMENT OF SAID ONE END OF THE DRAWBAR MEANS TO THE FIFTH WHEEL INCLUDING A RESILIENT ELEMENT BETWEEN THE DRAWBAR MEANS AND THE FIFTH WHEEL TO ABSORB SHOCK STRESSES APPLIED TO THE FIFTH WHEEL, AND EXTENSIBLE TRANSVERSE SUPPORT MEANS BENEATH THE FIFTH WHEEL EXTENDING BETWEEN THE FIFTH WHEEL
References Cited (Backward Citations)
US2733931A
Cited
US2903256A
Cited
US2928684A
Cited
US2919930A
Cited
US3074739A
Cited
FR1324996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |