US3814191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powered lift and lock for a foldable implement frame
Assignee: Case LLC
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Filing: 1972-12-26
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Granted: 1974-06-04
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Expires: 1992-12-26
Abstract
Abstract A powered lift and lock for a foldable implement frame having a main frame and a wing frame pivotally mounted on the main frame for folding relative thereto. Disc harrows are suspended on the frames for working the ground in the usual manner. A latch is pivotally mounted on the wing frame and cam-locks with the main frame to hold the two frames in the horizontal position. A hydraulic cylinder is mounted on the main frame and its rod extends to the wing frame and connects therewith for lifting and lowering the wing frame. The connection between the rod and the wing frame is a lost motion connection, and a link extends between the connection of the rod and the latch so that the latch is secured when the wing frame is lowered, and the latch is released in the initial motion of raising the wing frame. Two species are shown, one where the hydraulic cylinder rod connects directly with the wing frame, and the other where the hydraulic cylinder rod connects with the wing frame through a linkage. The wing frame has a support surface which engages a pad on the main frame for supporting the wing frame in folded position on top of the main frame.
Inventors
- 👤 L Tilbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:53
CPC Classifications
A; A01; A01B; A01B73/00; A01B73/02; A01B73/04; A01B73/044
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
309 words
A powered lift and lock for a foldable implement frame comprising a main frame section, a wing frame section, a pivot mounting for pivotally attaching said wing frame section to said main frame section to have said wing frame section pivotal on said main frame section between a position forming an extension to said main frame section and a position of being foldable over said main frame section, a lock releasably interconnected between said sections for releasably securing said wing frame section in the extended disposition relative to said main frame section, said lock including a latch pivotally mounted on said wing frame section on a pivot axis located at an elevation lower than the elevation of said pivot mounting and having a curved finger on the extending end of said latch, a latch curved surface on said main frame section and disposed for engagement by said curved finger for latching said latch to said curved latch surface, said latch being pivotally mounted on said wing frame section to be pivotal in an upward direction on said wing frame section when pivoting into engagement with said curved latch surface, powered means mounted on said main frame section and being connected with said wing frame section in a lost motion connection engaged in one direction of movement of said connection for pivotally lowering said wing frame section relative to said main frame section and said lost motion connection engaged in the other direction of movement of said connection for raising said wing framed section relative to said main frame section, and a connector pivotally connected between said latch and said lost motion connection and arranged to pivot said latch into the latching position upon movement of said connection in said one direction and to pivot said latch into the unlatched position upon movement of said connection in said other direction.
Claim 2
Dependent Claim
309 words
A powered lift and lock for a foldable implement frame comprising a main frame section, a wing frame section, a pivot mounting for pivotally attaching said wing frame section to said main frame section to have said wing frame section pivotal on said main frame section between a position forming an extension to said main frame section and a position of being foldable over said main frame section, a lock releasably interconnected between said sections for releasably securing said wing frame section in the extended disposition relative to said main frame section, said lock including a latch pivotally mounted on said wing frame section on a pivot axis located at an elevation lower than the elevation of said pivot mounting and having a curved finger on the extending end of said latch, a latch curved surface on said main frame section and disposed for engagement by said curved finger for latching said latch to said curved latch surface, said latch being pivotally mounted on said wing frame section to be pivotal in an upward direction on said wing frame section when pivoting into engagement with said curved latch surface, powered means mounted on said main frame section and being connected with said wing frame section in a lost motion connection engaged in one direction of movement of said connection for pivotally lowering said wing frame section relative to said main frame section and said lost motion connection engaged in the other direction of movement of said connection for raising said wing framed section relative to said main frame section, and a connector pivotally connected between said latch and said lost motion connection and arranged to pivot said latch into the latching position upon movement of said connection in said one direction and to pivot said latch into the unlatched position upon movement of said connection in said other direction.
Claim 3
Dependent Claim
113 words
The powered lift and lock for a foldable implement frame as claimed in claim 1, wherein said lost motion connection is a slot in said wing frame section and is horizontally disposed when said wing frame section is in the position forming an extension to said main frame section, and the contact between said powered means and said wing frame section being established at each end of said slot and with said lost motion connection being disposed to be pivotal about said pivot mounting of the attachment between said frames, for maximum leverage between said pivot mounting and said lost motion connection when said wing frame section is in the folded over position.
Claim 4
Dependent Claim
38 words
The powered lift and lock for a foldable implement frame as claimed in claim 2, wherein said connector is a link having one end connected with said powered means and the other end pivotally connected with said latch.
Claim 5
Dependent Claim
68 words
The powered lift and lock for a foldable implement frame as claimed in claim 1, wherein said connector is a link pivotally connected to said latch at a location spaced from the pivot axis of said latch, for forming an articulated linkage with said latch and said connEctor, and said powered means being a cylinder and rod assembly with the cylinder pivotally mounted on said main frame section.
Claim 6
Dependent Claim
40 words
The powered lift and lock for a foldable implement frame as claimed in claim 1, including linkage interconnected between said powered means and said wing frame section, with one link of said linkage being pivoted on said main frame section.
References Cited (Backward Citations)
US2972385A
Cited
US3274713A
Cited
US3633680A
Cited
US3693724A
Cited
US3713495A
Cited
US3650333A
Cited
US3692121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |