US3200630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral heavy duty door knob and method of forming the same
Assignee: Individual
•
Filing: 1962-11-20
•
Granted: 1965-08-17
•
Expires: 1982-11-20
Abstract
No abstract record available.
Inventors
- 👤 William B Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:05
CPC Classifications
B; B21; B21K; B21K23/00; B21C; B21C23/00; B21C23/02; B21C23/20; Y; Y10; Y10S; Y10S29/00; Y10S29/047; Y10T; Y10T29/00; Y10T29/49; Y10T29/49599; Y10T292/00; Y10T292/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
THE METHOD OF FORMING AN INTEGRAL HEAVY DUTY KNOB ASSEMBLY INCLUDING A KNOB AND AN INTEGRAL INTERNAL TUBULAR PART IN A HIGH ENERGY PRESS WHICH COMPRISES THE STEPS OF INSERTING A SLUG OF METAL OF LESSER DIAMETER THAN THAT OF THE CAVITY OF A FEMALE DIE FORMING THE EXTERNAL CONTOUR OF THE KNOB, AND IMPACTING THE OUTER FACE OF THE SLUB BY MEANS OF A RAM CONTAINING THE FEMALE DIE WITH THE LATTER HAVING AN INTERNAL CONTOUR CONFORMING TO THE OUTER CONTOUR OF THE KNOB AND CONCENTRIC EXTRUSION PUNCHES CONTACTED BY THE INNER FACE OF THE SLUG AND OVER WHICH THE METAL OF THE SLUG FLOWS, THE OUTER OF SAID PUNCHES HAVING A CENTRAL BORE RECEIVING A CENTER PUNCH HAVING A REDUCED FREE END SPACED FROM THE INTERIOR OF THE OUTER CONCENTRIC PUNCH TO PROCIDE AN ANNULAR SPACE THEREBETWEEN AND DURING IMPACT THE EXTERIOR OF SAID OUTER CONCENTRIC PUNCH IS ENCOMPASSED BY THE FEMALE DIE WITH THE LATTER SPACED FROM THE INTERIOR OF THE DIE TO CAUSE METAL OF SAID SLUG TO FLOW INTO SAID ANNULAR SPACES TO FORM AN INTERNAL HOLLOW TUBULAR PART AND AN EXTERNAL CONCENTRIC KNOB, WITHDRAWING THE FEMALE DIE FROM THE FORMED CUPPED EXTRUDED KNOB ASSEMBLY, WITHDRAWING THE INNER PUNCH RELA-
Claim 2
Independent Claim
205 words
THE METHOD OF FORMING AN INTEGRAL HEAVY DUTY KNOB ASSEMBLY INCLUDING A KNOB AND AN INTEGRAL INTERNAL TUBULAR PART IN A HIGH ENERGY PRESS WHICH COMPRISES THE STEPS OF INSERTING A SLUG OF METAL OF LESSER DIAMETER THAN THAT OF THE CAVITY OF A FEMALE DIE FORMING THE EXTERNAL CONTOUR OF THE KNOB, AND IMPACTING THE OUTER FACE OF THE SLUB BY MEANS OF A RAM CONTAINING THE FEMALE DIE WITH THE LATTER HAVING AN INTERNAL CONTOUR CONFORMING TO THE OUTER CONTOUR OF THE KNOB AND CONCENTRIC EXTRUSION PUNCHES CONTACTED BY THE INNER FACE OF THE SLUG AND OVER WHICH THE METAL OF THE SLUG FLOWS, THE OUTER OF SAID PUNCHES HAVING A CENTRAL BORE RECEIVING A CENTER PUNCH HAVING A REDUCED FREE END SPACED FROM THE INTERIOR OF THE OUTER CONCENTRIC PUNCH TO PROCIDE AN ANNULAR SPACE THEREBETWEEN AND DURING IMPACT THE EXTERIOR OF SAID OUTER CONCENTRIC PUNCH IS ENCOMPASSED BY THE FEMALE DIE WITH THE LATTER SPACED FROM THE INTERIOR OF THE DIE TO CAUSE METAL OF SAID SLUG TO FLOW INTO SAID ANNULAR SPACES TO FORM AN INTERNAL HOLLOW TUBULAR PART AND AN EXTERNAL CONCENTRIC KNOB, WITHDRAWING THE FEMALE DIE FROM THE FORMED CUPPED EXTRUDED KNOB ASSEMBLY, WITHDRAWING THE INNER PUNCH RELA-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |