Patent US508426A successfully refreshed from Google Patents.
Patent US3701443A successfully refreshed from Google Patents.
US3701443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailers
Assignee: C Van der Lely NV
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Filing: 1970-10-21
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Granted: 1972-10-31
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Expires: 1990-10-21
Abstract
Abstract The combination of a trailer with a lifting mechanism and one or more relatively large containers for receiving agricultural produce and which, when empty, can be stacked one in the other. The lifting mechanism comprises a pair of parallelogram rod systems which extend from either side of the trailer and are pivotable relative thereto, a shaft connecting the upper ends of the rod systems for supporting engagement means adapted to connect to pins which extend from the upper rims of the containers whereby when such connection is made, a single container or a plurality of stacked containers can be loaded or unloaded from the trailer or stacked containers on the trailer by pivoting the lifting mechanism. The engagement means may be selectively affixed to its supporting shaft for maintaining the containers at a desired inclination throughout the loading or unloading cycle irrespective of their center of gravity. The containers may be provided with a pouring spout and tipped by the lifting mechanism to cause material therein to pour out of same.
Inventors
- 👤 Cornelis Van Der Lely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:17
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/64; B60P1/48; B60P1/483
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
225 words
A trailer for transporting material which comprises: a mobile frame; a plurality of containers disposed in a stack carried by said frame, each of said containers having extending connection means near their upper edges and in offset relationship to the center of gravity of the container; a lifting mechanism pivotally mounted on said frame, said lifting mechanism comprising a pair of parallel rod systems pivotally attached on opposing sides of said frame, the ends of the rods of said systems being located at the corners of a quadrangle; said lifting mechanism further comprising engagement means attached to the free ends of said rod systems adapted to perform the functions of detachably connecting said lifting mechanism to the connection means of each said container and of preventing angular displacement of the connected container relative to said frame so said lifting mechanism swings about its pivot axes; whereby said lifting mechanism is adapted to load and unload relative to said frame any selected one of said plurality of containers and all containers stacked thereon separately from any remaining containers by connecting said engagement means to the connection means of the selected container and lifting said selected container and all containers stacked thereon and removing them together in their stacked condition by said lifting mechanism away from such lower containers of said plurality of containers as may remain.
Claim 2
Dependent Claim
225 words
A trailer for transporting material which comprises: a mobile frame; a plurality of containers disposed in a stack carried by said frame, each of said containers having extending connection means near their upper edges and in offset relationship to the center of gravity of the container; a lifting mechanism pivotally mounted on said frame, said lifting mechanism comprising a pair of parallel rod systems pivotally attached on opposing sides of said frame, the ends of the rods of said systems being located at the corners of a quadrangle; said lifting mechanism further comprising engagement means attached to the free ends of said rod systems adapted to perform the functions of detachably connecting said lifting mechanism to the connection means of each said container and of preventing angular displacement of the connected container relative to said frame so said lifting mechanism swings about its pivot axes; whereby said lifting mechanism is adapted to load and unload relative to said frame any selected one of said plurality of containers and all containers stacked thereon separately from any remaining containers by connecting said engagement means to the connection means of the selected container and lifting said selected container and all containers stacked thereon and removing them together in their stacked condition by said lifting mechanism away from such lower containers of said plurality of containers as may remain.
Claim 3
Dependent Claim
33 words
A trailer as claimed in claim 1, wherein said engagement means connect the selected container of said plurality automatically when said engagement means are positioned in an upward direction by said lifting means.
Claim 4
Dependent Claim
20 words
A trailer as claimed in claim 2, wherein said engagement means connect with said extending connection means on their undersides.
Claim 5
Dependent Claim
27 words
A trailer as claimed in claim 1, wherein said engagement means are pivotable about an axis extending substantially in the usual direction of travel of said trailer.
Claim 6
Dependent Claim
14 words
A trailer as claimed in claim 4, wherein said engagement means are hydraulically actuated.
Claim 7
Dependent Claim
23 words
A trailer as claimed in claim 1, wherein support means is provided preventing unwanted movements of said trailer during loading or unloading operations.
Claim 8
Dependent Claim
20 words
A trailer as claimed in claim 6, wherein said support means is pivotable relative to said Frame by hydraulic means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |