US3315513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material working method and apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1964-01-15
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Granted: 1967-04-25
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Expires: 1984-01-15
Abstract
No abstract record available.
Inventors
- 👤 George W Ellenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:33
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/02; B21D51/08; C; C21; C21D; C21D7/00; C21D7/02; C21D7/10; C21D7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE METHOD OF TRUING AN OPEN END HOLLOW CUPSHAPED WORKPIECE HAVING AN ANNULAR MARGINAL PORTION DEFINING SAID OPEN END AND INCREASING IN CROSS-SECTION TOWARDS ITS OPEN END, WHICH METHOD COMPRISES THE FOLLOWING STEPS: (A) PLACING SAID CUP-SHAPED WORKPIECE IN NESTING ABUTMENT WITH A SIMILARLY BUT MORE PRECISELY MALE MATING MANDREL FORMED OF MATERIAL HAVING A LARGER COEFFICIENT OF THERMAL EXPANSION THAN SAID WORKPIECE; (B) DRAWING SAID WORKPIECE INTO SNUGLY FITTING ENGAGEMENT WITH SAID MANDREL TO TAKE UP THE SLACK IN AXIAL DIRECTION; (C) SECURING SAID WORKPIECE ADJACENT SAID MARGINAL PORTION TO HOLD THE WORKPIECE AGAINST AXIAL MOVEMENT; AND (D) HEATING SAID MANDREL TO A TEMPERATURE AT WHICH THE RESULTING THERMAL EXPANSION OF THE MANDREL IS EFFECTIVE TO DISTEND AND TRUE SAID WORKPIECE.
Claim 2
Independent Claim
122 words
THE METHOD OF TRUING AN OPEN END HOLLOW CUPSHAPED WORKPIECE HAVING AN ANNULAR MARGINAL PORTION DEFINING SAID OPEN END AND INCREASING IN CROSS-SECTION TOWARDS ITS OPEN END, WHICH METHOD COMPRISES THE FOLLOWING STEPS: (A) PLACING SAID CUP-SHAPED WORKPIECE IN NESTING ABUTMENT WITH A SIMILARLY BUT MORE PRECISELY MALE MATING MANDREL FORMED OF MATERIAL HAVING A LARGER COEFFICIENT OF THERMAL EXPANSION THAN SAID WORKPIECE; (B) DRAWING SAID WORKPIECE INTO SNUGLY FITTING ENGAGEMENT WITH SAID MANDREL TO TAKE UP THE SLACK IN AXIAL DIRECTION; (C) SECURING SAID WORKPIECE ADJACENT SAID MARGINAL PORTION TO HOLD THE WORKPIECE AGAINST AXIAL MOVEMENT; AND (D) HEATING SAID MANDREL TO A TEMPERATURE AT WHICH THE RESULTING THERMAL EXPANSION OF THE MANDREL IS EFFECTIVE TO DISTEND AND TRUE SAID WORKPIECE.
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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |