Patent US3191561A successfully refreshed from Google Patents.
US3191561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewing machine upper feed control
Assignee: Duerkoppwerke GmbH
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Filing: 1963-03-18
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Granted: 1965-06-29
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Expires: 1983-03-18
Abstract
No abstract record available.
Inventors
- 👤 Nicolay Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:45
CPC Classifications
D; D05; D05B; D05B27/00; D05B27/02; D05B27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN A SEWING MACHINE, IN COMBINATION WITH A PRESSER FOOT HAVING A LIFTING BAR, AN UPPER FEED FOOT HAVING A LIFTING BAR AND MEANS FOR LIFTING THE FEEDER FOOT AND THE PRESSER FOOT FROM A WORKPIECE ALTERNATIVELY, A CONTROL DEVICE FOR VARYING THE EXTENT OF THE LIFT OF SAID PRESSER, FOOT AND FEEDER FOOT COMPRISING A LEVER HAVING THREE PIVOT POINTS IN A SUBSTANTIALLY TRIANGULAR ARRANGEMENT, A FIRST PIVOT CONNECTION BETWEEN ONE OF SAID PIVOT POINTS OF SAID LEVER AND SAID PRESSER FOOT LIFTING BAR, A SECOND PIVOT CONNECTION, BETWEEN A SECOND POINT OF SAID LEVER AND SAID FEEDER FOOT LIFTING BAR, SPRING MEANS BEARING UPON AND URGING MOVEMENT OF SAID THREE POINT LEVER TO DEPRESS AND SAID LIFTING BARS, A DRIVE SHAFT, A OBLIQUE CAM SUPPORTED ON SAID DRIVE SHAFT FOR SLIDING MOVEMENT THEREON AND CONNECTED THERETO FOR ROTATION THEREWITH, A ECCENTRIC FIXED TO SAID DRIVE SHAFT AND TRANSFIXED ROTATABLY BY SAID OBLIQUE CAM, AN ECCENTRIC STRAP ON SAID ECCENTRIC, A ROCKER ARM, A PIV-
Claim 2
Dependent Claim
166 words
IN A SEWING MACHINE, IN COMBINATION WITH A PRESSER FOOT HAVING A LIFTING BAR, AN UPPER FEED FOOT HAVING A LIFTING BAR AND MEANS FOR LIFTING THE FEEDER FOOT AND THE PRESSER FOOT FROM A WORKPIECE ALTERNATIVELY, A CONTROL DEVICE FOR VARYING THE EXTENT OF THE LIFT OF SAID PRESSER, FOOT AND FEEDER FOOT COMPRISING A LEVER HAVING THREE PIVOT POINTS IN A SUBSTANTIALLY TRIANGULAR ARRANGEMENT, A FIRST PIVOT CONNECTION BETWEEN ONE OF SAID PIVOT POINTS OF SAID LEVER AND SAID PRESSER FOOT LIFTING BAR, A SECOND PIVOT CONNECTION, BETWEEN A SECOND POINT OF SAID LEVER AND SAID FEEDER FOOT LIFTING BAR, SPRING MEANS BEARING UPON AND URGING MOVEMENT OF SAID THREE POINT LEVER TO DEPRESS AND SAID LIFTING BARS, A DRIVE SHAFT, A OBLIQUE CAM SUPPORTED ON SAID DRIVE SHAFT FOR SLIDING MOVEMENT THEREON AND CONNECTED THERETO FOR ROTATION THEREWITH, A ECCENTRIC FIXED TO SAID DRIVE SHAFT AND TRANSFIXED ROTATABLY BY SAID OBLIQUE CAM, AN ECCENTRIC STRAP ON SAID ECCENTRIC, A ROCKER ARM, A PIV-
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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |