Patent US1704974A successfully refreshed from Google Patents.
Patent US2647847A successfully refreshed from Google Patents.
US2647847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for interfitting machined parts
Assignee: Fluid Packed Pump Co
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Filing: 1950-02-28
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Granted: 1953-08-04
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Expires: 1970-02-28
Abstract
No abstract record available.
Inventors
- 👤 Millard S Black
- 👤 Jr Albert G Satterla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:30
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/04; F16B7/0406; F16B7/0413; Y; Y10; Y10S; Y10S29/00; Y10S29/035; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49236; Y10T29/49238; Y10T29/49826; Y10T29/49861; Y10T29/49863; Y10T29/49865; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A METHOD FOR INTERFITTING TWO METAL PARTS ONE WITHIN THE OTHER THAT CONSISTS IN PROVIDING THE OUTER PART WITH A SEAT THAT IS SLIGHTLY LARGER THAN THE INNER PART TO RECEIVE SAID INNER PART WITH SLIDING CLEARANCE, FORMING SAID INNER PART OF A FERROUS METAL THAT INCLUDES 3.5 TO 5% OF NICKEL AND 1.4 TO 2% OF CHROMIUM, AND SUBJECTING THE ASSEMBLED PARTS TO A SUB-ZERO TEMPERATURE THAT IS SUFFICIENTLY LOW ENOUGH TO CAUSE SAID INNER PART TO PERMANENTLY GROW TO A SIZE LARGER THAN THE SEAT IT OCCUPIES AND TO TIGHTLY FIT SAID SEAT.
Claim 2
Independent Claim
95 words
A METHOD FOR INTERFITTING TWO METAL PARTS ONE WITHIN THE OTHER THAT CONSISTS IN PROVIDING THE OUTER PART WITH A SEAT THAT IS SLIGHTLY LARGER THAN THE INNER PART TO RECEIVE SAID INNER PART WITH SLIDING CLEARANCE, FORMING SAID INNER PART OF A FERROUS METAL THAT INCLUDES 3.5 TO 5% OF NICKEL AND 1.4 TO 2% OF CHROMIUM, AND SUBJECTING THE ASSEMBLED PARTS TO A SUB-ZERO TEMPERATURE THAT IS SUFFICIENTLY LOW ENOUGH TO CAUSE SAID INNER PART TO PERMANENTLY GROW TO A SIZE LARGER THAN THE SEAT IT OCCUPIES AND TO TIGHTLY FIT SAID SEAT.
Claim 3
Independent Claim
166 words
A METHOD FOR INTERFITTING TWO TUBULAR METAL PARTS ONE WITHIN THE OTHER THAT CONSISTS IN CASTING THE INNER PART OF A FERROUS METAL THAT INCLUDES 3.5% TO 5% OF NICKEL AND 1.4% TO 2% OF CHROMIUM AND WHICH METAL HARDENS WHEN SUBJECTED TO SUB-ZERO TEMPERATURE, MACHINING THE OUTER SURFACE OF SAID PART WHILE THE SAME IS AT ORDINARY ROOM TEMPERATURE AND WHILE RELATIVELY SOFT, FORMING A SEAT IN THE OUTER PART THAT IS SLIGHTLY LARGER THAN THE MACHINED INNER PART WHILE SAID OUTER PART IS ALSO AT ORDINARY ROOM TEMPERATURE, ASSEMBLING THE INNER PART WITH SLIDING CLEARANCE INTO THE SEAT OF THE OUTER PART, AND SUBJECTING THE ASSEMBLED PARTS TO SUB-ZERO TEMPERATURE AT LEAST AS LOW AS -60* F. TO CAUSE SAID INNER PART, BY REASON OF ITS COMPOSITION, TO HARDEN AND TO PERMANENTLY GROW TO A SIZE LARGER THAN THE INITIAL SIZE OF THE SEAT IN THE OUTER PART AND TO, THEREBY, TIGHTLY FIT SAID SEAT AFTER THE PARTS HAVE BEEN RETURNED TO ROOM TEMPERATURE.
Claim 4
Independent Claim
166 words
A METHOD FOR INTERFITTING TWO TUBULAR METAL PARTS ONE WITHIN THE OTHER THAT CONSISTS IN CASTING THE INNER PART OF A FERROUS METAL THAT INCLUDES 3.5% TO 5% OF NICKEL AND 1.4% TO 2% OF CHROMIUM AND WHICH METAL HARDENS WHEN SUBJECTED TO SUB-ZERO TEMPERATURE, MACHINING THE OUTER SURFACE OF SAID PART WHILE THE SAME IS AT ORDINARY ROOM TEMPERATURE AND WHILE RELATIVELY SOFT, FORMING A SEAT IN THE OUTER PART THAT IS SLIGHTLY LARGER THAN THE MACHINED INNER PART WHILE SAID OUTER PART IS ALSO AT ORDINARY ROOM TEMPERATURE, ASSEMBLING THE INNER PART WITH SLIDING CLEARANCE INTO THE SEAT OF THE OUTER PART, AND SUBJECTING THE ASSEMBLED PARTS TO SUB-ZERO TEMPERATURE AT LEAST AS LOW AS -60* F. TO CAUSE SAID INNER PART, BY REASON OF ITS COMPOSITION, TO HARDEN AND TO PERMANENTLY GROW TO A SIZE LARGER THAN THE INITIAL SIZE OF THE SEAT IN THE OUTER PART AND TO, THEREBY, TIGHTLY FIT SAID SEAT AFTER THE PARTS HAVE BEEN RETURNED TO ROOM TEMPERATURE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |