Patent US4524596A successfully refreshed from Google Patents.
US4524596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming and feeding torsion springs
Assignee: Fujifilm Holdings Corp
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Filing: 1983-10-18
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Granted: 1985-06-25
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Expires: 2003-10-18
Abstract
Abstract A torsion spring having a coiled portion and straight ends is formed on a spindle by a winding machine with the coiled portion being wound around the spindle. A transfer device for transferring the torsion spring to a spring feeding position in which the torsion spring is fed to a spring inserting device receives the torsion spring directly from the spindle and transfers it to the spring feeding position keeping the torsion spring in a predetermined orientation.
Inventors
- 👤 Yuzo Tsunekawa
- 👤 Takashi Tomizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:17
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/113; B; B21; B21F; B21F33/00; B21F33/04; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08721; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5187; Y10T29/519; Y10T29/53; Y10T29/534; Y10T29/53404
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
214 words
A method of feeding torsion springs to a system which uses the torsion springs, each torsion spring having a coiled portion and straight ends, the method comprising: providing at least one winding means, having a spindle with an axis, for forming a torsion spring by winding a wire about said spindle; providing a transfer means for transferring the torsion spring from said winding means to a spring feeding position in which the torsion spring is fed to a spring inserting means for inserting the torsion spring into a system which uses the torsion spring, while maintaining the torsion spring in a predetermined orientation during said transfer from the winding machine to the spring feeding position, said transfer means having at least one spring support pin having an axis and an associated pair of spring retainer pins; forming a torsion spring by winding a wire about said spindle; delivering the so-formed torsion spring to the transfer means by axially aligning said spindle and said spring support pin and moving the torsion spring in the axial direction from the spindle to the spring support pin so that the coiled portion of the torsion spring receives therein the spring support pin and the ends of the torsion spring are held in place by respective spring retainer pins.
Claim 2
Independent Claim
214 words
A method of feeding torsion springs to a system which uses the torsion springs, each torsion spring having a coiled portion and straight ends, the method comprising: providing at least one winding means, having a spindle with an axis, for forming a torsion spring by winding a wire about said spindle; providing a transfer means for transferring the torsion spring from said winding means to a spring feeding position in which the torsion spring is fed to a spring inserting means for inserting the torsion spring into a system which uses the torsion spring, while maintaining the torsion spring in a predetermined orientation during said transfer from the winding machine to the spring feeding position, said transfer means having at least one spring support pin having an axis and an associated pair of spring retainer pins; forming a torsion spring by winding a wire about said spindle; delivering the so-formed torsion spring to the transfer means by axially aligning said spindle and said spring support pin and moving the torsion spring in the axial direction from the spindle to the spring support pin so that the coiled portion of the torsion spring receives therein the spring support pin and the ends of the torsion spring are held in place by respective spring retainer pins.
Claim 3
Dependent Claim
55 words
The method as claimed in claim 1, wherein two winding means are provided for simultaneous formation of torsion springs, and said transfer means has two spring support pins, each with an associated pair of spring retainer pins; whereby a pair of torsion springs may be formed and then transferred to said spring feeding position simultaneously.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |