Patent US3724406A successfully refreshed from Google Patents.
US3724406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Presser foot for a sewing machine
Assignee: Mefina SA
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Filing: 1971-05-21
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Granted: 1973-04-03
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Expires: 1991-05-21
Abstract
Abstract The presser foot has a sole plate pivoted by an axle to a support attached to the presser bar. A portion of the sole plate behind the needle passage hole is upwardly retractable against the action of a spiral spring and is suspended from the axle. Stops, formed by a transverse rod fixed in the sole plate between the needle passage hole and the retractable portion and by an inner edge of the sole plate, limit the oscillation of the retractable portion. The spring is housed in the retractable portion and bears against the axle. Vertical grooves in the retractable portion act as vertical guides. The parts of the foot can be of plastics material.
Inventors
- 👤 M Fresard
- 👤 J Gabriel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:15
CPC Classifications
D; D05; D05B; D05B29/00; D05B29/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
Presser foot for a sewing machine, said foot comprising a support adapted to be attached to the presser bar of the machine, a sole plate pivoted by an axle to said support and defining a needle passage hole, a portion of the sole plate situated behind the needle passage hole being mounted to retract upwardly against the action of a spiral spring, said retractable portion suspended from said pivoting axle in such a way that, when the presser foot is in its inactive position, the bottom face of said retractable portion of the sole plate remains flush with the bottom face of the surrounding parts of the bottom face of the sole plate, stop means limiting the oscillation of said retractable portion, said spiral spring engaged in a housing within said retractable portion and supported against said axle.
Claim 2
Dependent Claim
138 words
Presser foot for a sewing machine, said foot comprising a support adapted to be attached to the presser bar of the machine, a sole plate pivoted by an axle to said support and defining a needle passage hole, a portion of the sole plate situated behind the needle passage hole being mounted to retract upwardly against the action of a spiral spring, said retractable portion suspended from said pivoting axle in such a way that, when the presser foot is in its inactive position, the bottom face of said retractable portion of the sole plate remains flush with the bottom face of the surrounding parts of the bottom face of the sole plate, stop means limiting the oscillation of said retractable portion, said spiral spring engaged in a housing within said retractable portion and supported against said axle.
Claim 3
Dependent Claim
42 words
Presser foot according to claim 1, wherein the stop means comprise, on one hand, a rod fixed transversally in the sole plate between the needle passage hole and the retractable portion and, on the other hand, one edge of the sole plate.
Claim 4
Dependent Claim
44 words
Presser foot according to claim 1, wherein the retractable portion has at least one elongated opening through which it is suspended from said pivoting axle, said elongated opening cooperating with the stop means to ensure guidance of the retractable portion in the vertical direction.
Claim 5
Dependent Claim
44 words
Presser foot according to claim 2, wherein the retractable portion has at least one elongated opening through which it is suspended from said pivoting axle, said elongated opening cooperating with the stop means to ensure guidance of the retractable portion in the vertical direction.
Claim 6
Dependent Claim
18 words
Presser foot according to claim 4, wherein the sole plate and retractable portion are made of plastics material.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |