Patent US2803449A successfully refreshed from Google Patents.
US2803449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for nitriding crankshafts
Assignee: Nat Forge & Ordnance Co
•
Filing: 1953-10-21
•
Granted: 1957-08-20
•
Expires: 1973-10-21
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:29
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/24; C23C8/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
THE COMBINATION IN A FURNACE HAVING A LOWER HORIZONTAL SUPPORT SURFACE FOR NITRIDING MULTIPLE THROW CRANKSHAFTS OF MEANS FOR SUPPORTING SAID CRANKSHAFT IN A VERTICAL POSITION THEREIN, SAID SUPPORTING MEANS COMPRISING A SHAFT EXTENDING UPRIGHT FROM SAID HORIZONTAL SUPPORT SURFACE WITHIN THE FURNACE, A PEDESTAL ON SAID SUPPORT SURFACE DISPOSED LATERALLY OF SAID SHAFT AND HAVING AN UPWARDLY EXTENDING CENTER ADAPTED TO ENGAGE THE LOWER END OF SAID CRACKSHAFT AT THE AXIS THEREOF, A SLEEVE MOUNTED ON THE UPPER END OF SAID SHAFT, CENTERING MEANS CARRIED BY SAID SLEEVE AND IN VERTICAL ALIGNMENT WITH SAID PEDESTAL CENTER ADAPTED TO ENGAGE THE UPPER END OF SAID CRANKSHAFT FOR HOLDING THE LATTER IN A VERTICAL POSITION, AND JACK MEANS DISPOSED AT THE THROW SECTIONS OF SAID CRACKSHAFT AND IN ALIGNMENT WITH THE AXIS OF SAID
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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |