US3614934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewing machine with upper feed
Assignee: GM Pfaff AG
•
Filing: 1968-08-21
•
Granted: 1971-10-26
•
Expires: 1988-08-21
Abstract
Abstract IN A SEWING MACHINE HAVING AN UPPER FEED DOG STRUCTURALLY COMBINED WITH THE PRESSER FOOT FOR BOTH HORIZONTAL AND VERTICAL OSCILLATING MOVEMENTS OF SAID DOG, AND A COMMON BIASING SPRING ARRANGED TO URGE BOTH THE PRESSER FOOT AND FEED DOG LIFT BARS INTO ENGAGEMENT OF THE PRESSER FOOT AND FEED DOG WITH THE WORK, AN AUXILIARY BIASING SPRING ACTING ON THE PRESSER FOOT BAR ONLY SERVES TO MAINTAIN THE SAME IN CONTINUOUS ENGAGEMENT WITH THE WORK, INDEPENDENTLY OF PRESSURE VARIATIONS ON THE WORK BY THE COMMON BIASING SPRING RESULTING FROM THE VERTICAL FEED DOG OSCILLATIONS.
Inventors
- 👤 Herbert Wenz
- 👤 Heinrich Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:45
CPC Classifications
D; D05; D05B; D05B27/00; D05B27/02; D05B27/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |