US3986468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewing machine needle
Assignee: Union Special Corp
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Filing: 1975-11-17
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Granted: 1976-10-19
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Expires: 1995-11-17
Abstract
Abstract An improved sewing machine needle provided with tapered flat surfaces on both sides of the needle, beginning at a point slightly rearward of the needle's eye and converging towards the point of the needle.
Inventors
- 👤 Henryk Anthony Szostak
- 👤 William Roy Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:30
CPC Classifications
D; D05; D05B; D05B85/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
151 words
A sewing machine needle comprising: a cone shaped leading end means terminating in a sharp point means; a shank means at the butt means of said needle; a blade means intermediate said cone shaped leading end means and said shank means; eye means located at the leading end of said blade means; thread groove means on each side of said needle extending from the rearward end of said cone shaped leading end means to a point closely adjacent said shank means in a plane parallel to the major axis of said needle; and elongated flat means extending on the same side of said needle as said thread groove means, said elongated flats extending from the rearward side of said eye means and symmetrically converging towards said point means forming an acute angle to said major axis and terminating between the forward end of said eye means and said sharp point means.
Claim 2
Dependent Claim
151 words
A sewing machine needle comprising: a cone shaped leading end means terminating in a sharp point means; a shank means at the butt means of said needle; a blade means intermediate said cone shaped leading end means and said shank means; eye means located at the leading end of said blade means; thread groove means on each side of said needle extending from the rearward end of said cone shaped leading end means to a point closely adjacent said shank means in a plane parallel to the major axis of said needle; and elongated flat means extending on the same side of said needle as said thread groove means, said elongated flats extending from the rearward side of said eye means and symmetrically converging towards said point means forming an acute angle to said major axis and terminating between the forward end of said eye means and said sharp point means.
Claim 3
Dependent Claim
25 words
The sewing machine needle of claim 1 wherein: said acute angle is symmetrical about said major axis at an angle of 6 ± 4 degrees.
Claim 4
Dependent Claim
104 words
A needle means for use in a sewing machine comprising: a shank means portion; a blade means portion; a ball eye portion; a flat side means on each side of said blade means portion; thread groove means extending along said flat side means rearwardly extending from a place adjacent said ball eye portion to the leading end of said shank means portion, and tapered flat means on the same side of said flat side means as said groove means, said tapered flat means cut in said ball eye means portion whereby gradually reducing the depth of said groove means in said ball eye portion.
Claim 5
Dependent Claim
104 words
A needle means for use in a sewing machine comprising: a shank means portion; a blade means portion; a ball eye portion; a flat side means on each side of said blade means portion; thread groove means extending along said flat side means rearwardly extending from a place adjacent said ball eye portion to the leading end of said shank means portion, and tapered flat means on the same side of said flat side means as said groove means, said tapered flat means cut in said ball eye means portion whereby gradually reducing the depth of said groove means in said ball eye portion.
References Cited (Backward Citations)
US1949349A
Cited
GB734656A
Cited
FR1143980A
Cited
DE1193006B
Cited
FR1433041A
Cited
US3347192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |