US3099310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring forming device
Assignee: Heckethorn Manufacturing and Supply Co
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Filing: 1961-09-14
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Granted: 1963-07-30
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Expires: 1981-09-14
Abstract
No abstract record available.
Inventors
- 👤 John E Heckethorn
- 👤 John D Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:39
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02; B21F3/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; Y10T29/49613
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
MEANS FOR FORMING ELONGATED CYLINDRICAL, HELICALLYCOILED, WIRE SPRINGS COMPRISING: A FIXED WIRE GRIPPING ROLLER; A MOVABLE WIRE GRIPPING ROLLER; SPRING MEANS URGING SAID MOVABLE ROLLER TOWARDS SAID FIXED ROLLER TO GRIP A SPRING WIRE THEREBETWEEN: A CURLING TOOL HAVING A HELICAL CONFORMATION CONFORMING TO THE DIAMETER AND PITCH OF THE DESIRED SPRINGS; MEANS FOR DRIVING SAID ROLLERS TO CONTINUOUSLY FORCE SAID WIRE INTO SAID CURLING TOOL TO FORM THE WIRE INTO THE FORM OF A ROTATING, ELONGATED, CYLINDRICAL HELICAL SPRING AS IT EXITS FROM SAID CURLING TOOL; A MOVABLE BEARING SUPPORT FOR SAID MOVABLE ROLLER; A FIXED BEARING SUPPORT FOR SAID FIXED ROLLER; A CAM LEVER PIVOTALLY MOUNTED ON SAID FIXED BEARING SUPPORT AND POSITIONED TO SWING AGAINST AN ABUTMENT ON SAID MOVABLE SUPPORT TO URGE SAID MOVABLE SUPPORT AWAY FROM SAID STATIONARY SUPPORT AT THE TERMINATION OF A FORMED SPRING; A FIXED SHEAR BLADE MOUNTED ON SAID FIXED BEARING SUPPORT ADJACENT THE EXIT OF THE WIRE FROM THE CURLING TOOL; AND A MOVABLE SHEAR BLADE MOUNTED ON SAID CAM LEVER IN SHEARING RELATION TO SAID FIXED SHEAR BLADE SO THAT WHEN SAID CAM LEVER MOVES INTO ROLLER-SEPARATING RELATION WITH SAID ABUTMENT SAID WIRE WILL BE SHEARED FROM THE FORMED SPRING.
Claim 2
Dependent Claim
201 words
MEANS FOR FORMING ELONGATED CYLINDRICAL, HELICALLYCOILED, WIRE SPRINGS COMPRISING: A FIXED WIRE GRIPPING ROLLER; A MOVABLE WIRE GRIPPING ROLLER; SPRING MEANS URGING SAID MOVABLE ROLLER TOWARDS SAID FIXED ROLLER TO GRIP A SPRING WIRE THEREBETWEEN: A CURLING TOOL HAVING A HELICAL CONFORMATION CONFORMING TO THE DIAMETER AND PITCH OF THE DESIRED SPRINGS; MEANS FOR DRIVING SAID ROLLERS TO CONTINUOUSLY FORCE SAID WIRE INTO SAID CURLING TOOL TO FORM THE WIRE INTO THE FORM OF A ROTATING, ELONGATED, CYLINDRICAL HELICAL SPRING AS IT EXITS FROM SAID CURLING TOOL; A MOVABLE BEARING SUPPORT FOR SAID MOVABLE ROLLER; A FIXED BEARING SUPPORT FOR SAID FIXED ROLLER; A CAM LEVER PIVOTALLY MOUNTED ON SAID FIXED BEARING SUPPORT AND POSITIONED TO SWING AGAINST AN ABUTMENT ON SAID MOVABLE SUPPORT TO URGE SAID MOVABLE SUPPORT AWAY FROM SAID STATIONARY SUPPORT AT THE TERMINATION OF A FORMED SPRING; A FIXED SHEAR BLADE MOUNTED ON SAID FIXED BEARING SUPPORT ADJACENT THE EXIT OF THE WIRE FROM THE CURLING TOOL; AND A MOVABLE SHEAR BLADE MOUNTED ON SAID CAM LEVER IN SHEARING RELATION TO SAID FIXED SHEAR BLADE SO THAT WHEN SAID CAM LEVER MOVES INTO ROLLER-SEPARATING RELATION WITH SAID ABUTMENT SAID WIRE WILL BE SHEARED FROM THE FORMED SPRING.
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) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |