US3754478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Main shaft for sewing machines
Assignee: Necchi SpA
•
Filing: 1971-11-12
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Granted: 1973-08-28
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Expires: 1991-11-12
Abstract
Abstract The invention relates to a means whereby a shaft and various normally separately made rotary members may all be assembled in essentially a single step. The shaft is inserted into a mold and the other rotary members are molded therearound as a one piece body.
Inventors
- 👤 S Perlino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:33
CPC Classifications
D; D05; D05B; D05B69/00; D05B69/30; D05B69/34; Y; Y10; Y10S; Y10S74/00; Y10S74/10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19851; Y10T74/19856; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20834; Y10T74/2084
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
56 words
A sewing machine main shaft to which is rigidly molded as an integral one piece body a handwheel and a pair of pulleys of different diameter, said handwheel and one pulley being axially spaced apart from each other and including therebetween radially extending stiffening ribs, said other pulley containing therewith circumferentially spaced axially extended lightening holes.
Claim 2
Dependent Claim
56 words
A sewing machine main shaft to which is rigidly molded as an integral one piece body a handwheel and a pair of pulleys of different diameter, said handwheel and one pulley being axially spaced apart from each other and including therebetween radially extending stiffening ribs, said other pulley containing therewith circumferentially spaced axially extended lightening holes.
Claim 3
Dependent Claim
17 words
The combination of claim 1, said handwheel being hollow and being closed by a separate end disc.
References Cited (Backward Citations)
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US295215A
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US1932974A
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US3016578A
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US3081497A
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US3491441A
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US3610066A
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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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |