US3588993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for feeding nested coil springs in rows
Assignee: Leggett and Platt Inc
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Filing: 1969-03-21
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Granted: 1971-06-29
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Expires: 1989-03-21
Abstract
Abstract A NUMBER OF COIL SPRINGS ARRANGED WITH THEIR AXES HORIZONTAL, ARE REMOVED, WHILE STILL NESTED, FROM A SUPPLY OF NESTED SPRINGS, BY A RECIPROCATING CARRIAGE. A PAIR OF SWINGING FINGERS ON EACH GRIPPER OF AN ALIGNED ROW OF GRIPPERS, GRIPS AND REMOVES ONLY THE END SPRING FROM THE CARRIAGE AS THE CARRIAGE MOVES PAST EACH GRIPPER. THE ROW OF GRIPPERS ERECTS THE ROW OF SPRINGS AND THEN TRANSFERS THEM TO A CONVENTIONAL SPRING-ROW ASSEMBLING MACHINE.
Inventors
- 👤 Dexter L Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:02
CPC Classifications
B; B21; B21F; B21F33/00; B21F33/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49815; Y10T29/49819; Y10T29/53; Y10T29/53274; Y10T29/53539; Y10T29/53543
Claims Analysis
Total Claims: 0
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |