Patent EP0167350A2 successfully refreshed from Google Patents.
US3220293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal severing apparatus
Assignee: BOC Group Ltd
•
Filing: 1963-12-16
•
Granted: 1965-11-30
•
Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Barber Brian Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:06
CPC Classifications
B; B23; B23D; B23D35/00; B23D35/001; B23D25/00; B23D25/12; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4836; Y10T83/929; Y10T83/9372; Y10T83/9396
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
AN APPARATUS FOR SEVERING METAL ROD STOCK OF CIRCULAR CROSS-SECTION COMPRISIN A PAIR OF ROTATABLE DRUMS HAVING A PARALLEL AXES, AND A PAIR OF SIMILAR SHEARING BLADES MOUNTED ONE ON EACH DRUM, THE SHEARING BLADES HAVING CONJUGATE BLADE GUIDIN PORTIONS OF APPROXIMATELY INVOLUTE FORM AND HAVING PART-CIRCULAR SHEAR EDGES, OF SLIGHTLY LARGER RADIUS THAN THE ROD STOCK, SET BACK RADIALLY INWARDS OF THE PITCH CIRCLE AND SET BACK FROM WHAT WOULD BE THE DEDENDUM PORTION OF THE INVOLUTE FORM, SUCH THAT THE SHEAR EDGES ENGAGE THE ROD STOCK IN A SINGLE CROSSSECTIONAL PLANE, THE SHEAR EDGES OF THE TWO BLADES BEING ADAPTED TOGETHER TO CONTACT AT LEAST 50% OF THE CROSSSECTIONAL PERIPHERY OF THE ROD STOCK DURING THE SEVERING OPERATION.
Claim 2
Independent Claim
120 words
AN APPARATUS FOR SEVERING METAL ROD STOCK OF CIRCULAR CROSS-SECTION COMPRISIN A PAIR OF ROTATABLE DRUMS HAVING A PARALLEL AXES, AND A PAIR OF SIMILAR SHEARING BLADES MOUNTED ONE ON EACH DRUM, THE SHEARING BLADES HAVING CONJUGATE BLADE GUIDIN PORTIONS OF APPROXIMATELY INVOLUTE FORM AND HAVING PART-CIRCULAR SHEAR EDGES, OF SLIGHTLY LARGER RADIUS THAN THE ROD STOCK, SET BACK RADIALLY INWARDS OF THE PITCH CIRCLE AND SET BACK FROM WHAT WOULD BE THE DEDENDUM PORTION OF THE INVOLUTE FORM, SUCH THAT THE SHEAR EDGES ENGAGE THE ROD STOCK IN A SINGLE CROSSSECTIONAL PLANE, THE SHEAR EDGES OF THE TWO BLADES BEING ADAPTED TOGETHER TO CONTACT AT LEAST 50% OF THE CROSSSECTIONAL PERIPHERY OF THE ROD STOCK DURING THE SEVERING OPERATION.
References Cited (Backward Citations)
US1941754A
Cited
US2125939A
Cited
US2756821A
Cited
US2738842A
Cited
US2868292A
Cited
US3084582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |