Patent US6782375B2 successfully refreshed from Google Patents.
Patent US3138274A successfully refreshed from Google Patents.
US3138274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch-controlled push-off stacker
Assignee: AL Manufacturing CO DU
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Filing: 1960-07-25
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Granted: 1964-06-23
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Expires: 1980-07-25
Abstract
No abstract record available.
Inventors
- 👤 Carleton J Delbridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:43
CPC Classifications
A; A01; A01D; A01D87/00; A01D87/0053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
IN A LIFT MECHANISM FOR ATTACHMENT TO A VEHICLE, ARM MEANS FOR ATTACHMENT TO THE VEHICLE, A FORK PIVOTALLY MOUNTED AT ITS BASE TO THE END OF THE ARM MEANS, AN UPRIGHT RIGIDLY MOUNTED ON THE BASE OF THE FORK, A SHAFT MOUNTED ON THE UPRIGHT, AN EJECTOR FOR MOVING ALONG THE FORK, ARMS CONNECTED TO THE SHAFT AND TO THE EJECTOR, MEANS FOR PIVOTING SAID SHAFT, A FIRST PISTON AND CYLINDER MEMBER CONNECTED TO THE PIVOTING MEANS FOR PIVOTING THE SHAFT AND OPERATING THE EJECTOR, A SECOND PISTON AND CYLINDER MEMBER FOR CHANGING THE PIVOTAL ANGLE OF THE FORK, AND A LINK MEMBER PIVOTALLY CONNECTED TO SAID SECOND PISTON AND CYLINDER MEMBER, SAID LINK MEMBER AND SECOND PISTON AND CYLINDER MEMBER PIVOTALLY CONNECTED AT ONE END TO SAID ARM MEANS AND AT THE OTHER END TO SAID UPRIGHT WITH SAID ENDS BEING FREELY PIVOTALLY MOVABLE SO THAT THE FORK MAY BE MOVED UPWARDLY IN A FLOATING ACTION AND SAID MEMBERS WILL PIVOT WITH RESPECT TO EACH OTHER WITHOUT OPERATING THE SECOND PISTON AND CYLINDER MEMBER.
Claim 2
Dependent Claim
176 words
IN A LIFT MECHANISM FOR ATTACHMENT TO A VEHICLE, ARM MEANS FOR ATTACHMENT TO THE VEHICLE, A FORK PIVOTALLY MOUNTED AT ITS BASE TO THE END OF THE ARM MEANS, AN UPRIGHT RIGIDLY MOUNTED ON THE BASE OF THE FORK, A SHAFT MOUNTED ON THE UPRIGHT, AN EJECTOR FOR MOVING ALONG THE FORK, ARMS CONNECTED TO THE SHAFT AND TO THE EJECTOR, MEANS FOR PIVOTING SAID SHAFT, A FIRST PISTON AND CYLINDER MEMBER CONNECTED TO THE PIVOTING MEANS FOR PIVOTING THE SHAFT AND OPERATING THE EJECTOR, A SECOND PISTON AND CYLINDER MEMBER FOR CHANGING THE PIVOTAL ANGLE OF THE FORK, AND A LINK MEMBER PIVOTALLY CONNECTED TO SAID SECOND PISTON AND CYLINDER MEMBER, SAID LINK MEMBER AND SECOND PISTON AND CYLINDER MEMBER PIVOTALLY CONNECTED AT ONE END TO SAID ARM MEANS AND AT THE OTHER END TO SAID UPRIGHT WITH SAID ENDS BEING FREELY PIVOTALLY MOVABLE SO THAT THE FORK MAY BE MOVED UPWARDLY IN A FLOATING ACTION AND SAID MEMBERS WILL PIVOT WITH RESPECT TO EACH OTHER WITHOUT OPERATING THE SECOND PISTON AND CYLINDER MEMBER.
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |