US3271801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dockboard
Assignee: Unarco Industries LLC
•
Filing: 1963-12-03
•
Granted: 1966-09-13
•
Expires: 1983-12-03
Abstract
No abstract record available.
Inventors
- 👤 Donald P Dieter
- 👤 Harris P Moyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:45
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/2805; B65G69/2811; B65G69/2835; B65G69/2841
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A DOCKBOARD COMPRISING A FRAME, A BOARD PIVOTED AT ONE END ON A HORIZONTAL AXIS TO THE FRAME, RESILIENT MEANS URGING THE OTHER END OTHE BOARD UPWARDLY, A LIP PIVOTED TO THE OTHER END OF THE BOARD TO MOVE FROM A DEPENDENT POSITION TO A RAISED POSITION FORMING AN EXTENSION OF THE BOARD, A FIRST EXTENSIBLE HYDRAULIC UNIT CONNECTING THE LIP AND THE BOARD TO RAISE THE LIP WHEN THE UNIT IS EXTENDED, A SECOND HYDRAULIC UNIT INCLUDING RELATIVELY MOVABLE PARTS, A FLUID CONNECTION FROM THE FIRST HYDRUALIC UNIT TO THE SECOND HYDRAULIC UNIT, MEANS CONNECTING THE PARTS OF THE SECOND HYDRAULIC UNIT RESPECTIVELY TO THE BOARD AND THE FRAME SO THAT THE SECOND HYDRAULIC UNIT WILL BE OPERATED BY RAISING OF THE BOARD TO FORCE FLUID FROM THE SECOND UNIT THROUGH THE FLUID CONNECTION INTO THE FIRST UNIT TO EXTEND IT, A CHECK VALVE IN THE FLUID CONNECTION OPENING TOWARD THE FIRST UNIT, AND MANUAL MEANS TO OPEN THE CHECK VALVE TO PERMIT FLOW OF FLUID FROM THE FIRST UNIT TO THE SECOND UNIT.
Claim 2
Dependent Claim
175 words
A DOCKBOARD COMPRISING A FRAME, A BOARD PIVOTED AT ONE END ON A HORIZONTAL AXIS TO THE FRAME, RESILIENT MEANS URGING THE OTHER END OTHE BOARD UPWARDLY, A LIP PIVOTED TO THE OTHER END OF THE BOARD TO MOVE FROM A DEPENDENT POSITION TO A RAISED POSITION FORMING AN EXTENSION OF THE BOARD, A FIRST EXTENSIBLE HYDRAULIC UNIT CONNECTING THE LIP AND THE BOARD TO RAISE THE LIP WHEN THE UNIT IS EXTENDED, A SECOND HYDRAULIC UNIT INCLUDING RELATIVELY MOVABLE PARTS, A FLUID CONNECTION FROM THE FIRST HYDRUALIC UNIT TO THE SECOND HYDRAULIC UNIT, MEANS CONNECTING THE PARTS OF THE SECOND HYDRAULIC UNIT RESPECTIVELY TO THE BOARD AND THE FRAME SO THAT THE SECOND HYDRAULIC UNIT WILL BE OPERATED BY RAISING OF THE BOARD TO FORCE FLUID FROM THE SECOND UNIT THROUGH THE FLUID CONNECTION INTO THE FIRST UNIT TO EXTEND IT, A CHECK VALVE IN THE FLUID CONNECTION OPENING TOWARD THE FIRST UNIT, AND MANUAL MEANS TO OPEN THE CHECK VALVE TO PERMIT FLOW OF FLUID FROM THE FIRST UNIT TO THE SECOND UNIT.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |