US3254740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating device for sewing machines
Assignee: Necchi SpA
•
Filing: 1963-10-24
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Granted: 1966-06-07
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Expires: 1983-10-24
Abstract
No abstract record available.
Inventors
- 👤 Bono Luigi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:49
CPC Classifications
D; D05; D05B; D05B71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN A SEWING MACHINE THE COMBINATION COMPRISING AN OIL RESERVOIR, MEANS FOR DISTRIBUTING THE OIL FROM SAID RESERVOIR TO THE PARTS OF THE MACHINE TO BE LUBRICATED, A SUMP FOR THE OIL, AND A SUCTION PUMP FOR CONVEYING THE OIL FROM SAID SUMP TO SAID RESERVOIR, SAID SUCTION PUMP COMPRISING A BUSHING ARRANGED IN SASID RESERVOIR ABOVE THE OIL LEVEL AND HAVING AT LEAST ONE FIRST AND ONE SECOND SUBSTANTIALLY RADIAL HOLE, A SHAFT PROVIDED WITH A PERIPHERAL HELICAL GROOVE HAVING A FIRST SECTION AND A SECOND SECTION EACH WOUND IN AN OPPOSITE SENSE, SAID BUSHING EMBRACING SAID GROOVE SO THAT SAID HOLES COMMUNICATE WITH THE GROOVE, AT LEAST ONE FIRST AND ONE SECOND SUCTION DUCT CONNECTED TO SAID FIRST AND SAID SECOND HOLE, SAID FIRST HOLE AND SAID FIRST DUCT COMMUNICATING WIT SAID SUMP AND SAID SECOND HOLE AND SAID SECOND DUCT COMMUNICATING WITH SAID RESERVOIR.
Claim 2
Dependent Claim
147 words
IN A SEWING MACHINE THE COMBINATION COMPRISING AN OIL RESERVOIR, MEANS FOR DISTRIBUTING THE OIL FROM SAID RESERVOIR TO THE PARTS OF THE MACHINE TO BE LUBRICATED, A SUMP FOR THE OIL, AND A SUCTION PUMP FOR CONVEYING THE OIL FROM SAID SUMP TO SAID RESERVOIR, SAID SUCTION PUMP COMPRISING A BUSHING ARRANGED IN SASID RESERVOIR ABOVE THE OIL LEVEL AND HAVING AT LEAST ONE FIRST AND ONE SECOND SUBSTANTIALLY RADIAL HOLE, A SHAFT PROVIDED WITH A PERIPHERAL HELICAL GROOVE HAVING A FIRST SECTION AND A SECOND SECTION EACH WOUND IN AN OPPOSITE SENSE, SAID BUSHING EMBRACING SAID GROOVE SO THAT SAID HOLES COMMUNICATE WITH THE GROOVE, AT LEAST ONE FIRST AND ONE SECOND SUCTION DUCT CONNECTED TO SAID FIRST AND SAID SECOND HOLE, SAID FIRST HOLE AND SAID FIRST DUCT COMMUNICATING WIT SAID SUMP AND SAID SECOND HOLE AND SAID SECOND DUCT COMMUNICATING WITH SAID RESERVOIR.
References Cited (Backward Citations)
US2731931A
Cited
US2837173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |