Patent US3305918A successfully refreshed from Google Patents.
US3305918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing composite castforged aluminum piston with bonded ferrous ring carrier
Assignee: Universal American Corp
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Filing: 1964-08-04
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Granted: 1967-02-28
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Expires: 1984-08-04
Abstract
No abstract record available.
Inventors
- 👤 Earl W Christen
- 👤 James F Seeley
- 👤 Mildred W Kingsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:11
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/02; F16; F16J; F16J9/00; F16J9/12; F16J9/22; F02F2200/00; F02F2200/04; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2251/00; F05C2251/04; F05C2251/042; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256; Y10T29/49261; Y10T29/4998; Y10T29/49988; Y10T29/49989
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
202 words
THE METHOD OF PRODUCING A COMPOSITE CAST-FORGED ALUMINUM PISTON WHICH COMPRISES: (A) PLACING A SUITABLY-PREPARED RING BAND IN A MOLD IN SUCH A POSITION THAT IT WILL BE LOCATED NEAR THE PERIPHERY OF THE PISTON HEAD, (B) CASTING ALUMINUM ABOUT THE BAND SO AS TO FORM A BLANK COMPRISING A SOLID ALUMINUM CYLINDER SURROUNDING AND METALLURGICALLY BONDED TO THE RING BAND, THE PORTION OF THE BLANK WHICH CONTAINS THE BANK BEING THE HEAD END, AND THE OPPOSITE END BEING THE SKIRT END, (C) MACHINING THE CAST BLANK TO EXPOSE THE OUTER SURFACE OF THE RING BAND AND TO PROVIDE A BLANK OF THE DESIRED LENGTH. (D) PLACING THE MACHINED BLANK IN A DIE WITH THE HEAD END DOWN, AFTER LUBRICATING THE UPPER PORTION OF THE DIE CAVITY, (E) ENGAGING THE SKIRT END OF THE BLANK WITH A PUNCH TO FORM THE INSIDE OF THE PISTON AND TO PRODUCE A FORGED SUBSTRUCTURE INCLUDING THE PISTON SKIRT, PIN BOSSES, BOSS SUPPORTING PARTS, AND A SUBSTRATUM FORMING THE LOWR PART OF THE PISTON HEAD, (F) LIMITING THE TRAVEL OF THE PUNCH TO SUCH AND EXTENT THAT CAST STRUCTURE IS PRESERVED IN THE TOP OF THE PISTON HEAD AND IN THE AREA SURROUNDING THE RING BAND.
Claim 2
Independent Claim
202 words
THE METHOD OF PRODUCING A COMPOSITE CAST-FORGED ALUMINUM PISTON WHICH COMPRISES: (A) PLACING A SUITABLY-PREPARED RING BAND IN A MOLD IN SUCH A POSITION THAT IT WILL BE LOCATED NEAR THE PERIPHERY OF THE PISTON HEAD, (B) CASTING ALUMINUM ABOUT THE BAND SO AS TO FORM A BLANK COMPRISING A SOLID ALUMINUM CYLINDER SURROUNDING AND METALLURGICALLY BONDED TO THE RING BAND, THE PORTION OF THE BLANK WHICH CONTAINS THE BANK BEING THE HEAD END, AND THE OPPOSITE END BEING THE SKIRT END, (C) MACHINING THE CAST BLANK TO EXPOSE THE OUTER SURFACE OF THE RING BAND AND TO PROVIDE A BLANK OF THE DESIRED LENGTH. (D) PLACING THE MACHINED BLANK IN A DIE WITH THE HEAD END DOWN, AFTER LUBRICATING THE UPPER PORTION OF THE DIE CAVITY, (E) ENGAGING THE SKIRT END OF THE BLANK WITH A PUNCH TO FORM THE INSIDE OF THE PISTON AND TO PRODUCE A FORGED SUBSTRUCTURE INCLUDING THE PISTON SKIRT, PIN BOSSES, BOSS SUPPORTING PARTS, AND A SUBSTRATUM FORMING THE LOWR PART OF THE PISTON HEAD, (F) LIMITING THE TRAVEL OF THE PUNCH TO SUCH AND EXTENT THAT CAST STRUCTURE IS PRESERVED IN THE TOP OF THE PISTON HEAD AND IN THE AREA SURROUNDING THE RING BAND.
Claim 3
Dependent Claim
17 words
A METHOD AS SPECIFIED THE CLAIM 1 IN WHICH THE RING BAND IS FORMED OF FERROUS MATERIAL.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |