Patent US4212256A successfully refreshed from Google Patents.
US4212256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable sole plate
Assignee: Mefina SA
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Filing: 1978-11-20
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Granted: 1980-07-15
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Expires: 1998-11-20
Abstract
Abstract A sewing machine presser foot is provided with a detachable sole plate connected to the spaced apart arms of a support member by means of a compressible pin assembly secured to the arms and projecting from the sides thereof. The sole plate is provided with inclined flanges on its upper surface and aligned openings beneath the flanges. When the sole plate is moved upwardly toward the support member the projecting ends of the pin assembly are engaged by the ramps and compressed toward each other to permit the projecting ends to engage in the openings in the sole plate upon release of the compressive force on said ends.
Inventors
- 👤 Antonio Jimenez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:50
CPC Classifications
D; D05; D05B; D05B29/00; D05B29/06; D05B29/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
A sewing machine presser foot including a sole plate and a support therefor, said support including a pair of spaced arms, each of said arms provided with a bore, a pin assembly compressible in a longitudinal direction and fixed in said bores of the arms of said support, said sole plate being attachable to and detachable from said pin assembly and including a flange on its upper face extending along each of its longitudinal edges, each said flange having an opening therein, said openings being aligned with each other, the ends of said pin assembly being of substantially hemispherical shape and of a greater diameter than the diameter of said openings, a ramp on each flange above each of said openings, said ramps being inclined toward each other whereby they guide said pin assembly into said openings when the ends of said pin assembly are engaged by said ramps and moved toward said openings.
Claim 2
Dependent Claim
154 words
A sewing machine presser foot including a sole plate and a support therefor, said support including a pair of spaced arms, each of said arms provided with a bore, a pin assembly compressible in a longitudinal direction and fixed in said bores of the arms of said support, said sole plate being attachable to and detachable from said pin assembly and including a flange on its upper face extending along each of its longitudinal edges, each said flange having an opening therein, said openings being aligned with each other, the ends of said pin assembly being of substantially hemispherical shape and of a greater diameter than the diameter of said openings, a ramp on each flange above each of said openings, said ramps being inclined toward each other whereby they guide said pin assembly into said openings when the ends of said pin assembly are engaged by said ramps and moved toward said openings.
Claim 3
Dependent Claim
38 words
A presser foot according to claim 1, wherein the pin assembly includes caps mounted on the ends of said pin, a spring between said caps, said caps slidable axially on said pin against the action of said spring.
Claim 4
Dependent Claim
44 words
A presser foot according to claim 2, wherein the caps are engaged in the bores in said arms, said bores being of the same diameter as said caps, said caps each provided with an abutment for engagement with the inner faces of said arms.
Claim 5
Dependent Claim
26 words
A presser foot according to claim 3, wherein the diameter of said caps is greater than the diameter of the openings in said sole plate flanges.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |