Patent US3206837A successfully refreshed from Google Patents.
US3206837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a reciprocal four-way spool valve
Assignee: Individual
•
Filing: 1961-12-11
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Granted: 1965-09-21
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Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Stanley H Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:52
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/34; B23Q5/36; B23Q35/00; B23Q35/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86686; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49416; Y10T29/49419; Y10T408/00; Y10T408/55; Y10T408/561; Y10T408/5617; Y10T409/00; Y10T409/30; Y10T409/304536; Y10T409/305936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
THE METHOD OF MANUFACTURING A RECIPROCAL FOURWAY SPOOL VALVE HAVING A RECIPROCAL CORE COMPRISING A PAIR OF ANNULAR LAND PORTIONS SPACED BY AN ANNULAR REDUCED DIAMETER PORTION AND A HOUSING CO-OPERABLE THEREWITH COMPRISING A PAIR OF ANNULAR PORTIONS OF LARGE INTERNAL DIAMETER SPACED BY A FIRST ANNULAR PORTION OF REDUCED INTERNAL DIAMETER AND WHICH IN TURN SPACED A SECOND PAIR OF REDUCED DIAMETER PORTIONS, WHICH CONSISTS OF FORMING EACH OF SAID PORTIONS AS A SEPARATE ANNULAR MEMBER AND MACHINING SAID PAIR OF ANNULAR LAND PORTIONS AND SAID FIRST ANNULAR PORTION OF REDUCED INTERNAL DIAMETER SIMULTANEOUSLY TO THE SAME THICKNESS AND LIKEWISE MACHINING SAID PAIR OF ANNULAR PORTIONS OF LARGE INTERNAL DIAMETER AND THE ANNULAR REDUCED DIAMETER PORTION OF SAID CORE SIMULTANEOUSLY TO A SECOND SAME THICKNESS AND ASSEMBLING SAID CORE AND HOUSING TOGETHER WITH THE ANNULAR LANDS OF THE CORE IN FACE-TO-FACE CORRELATION WITH THE HOUSING PORTIONS OF LARGE INTERNAL DIAMETER AND WITH THE REDUCED DIAMETER PORTION OF THE CORE IN FACE-TO-FACE RELATION WITH THE FIRST REDUCED INTERNAL DIAMETER PORTION OF THE HOUSING AND WITH THE SECOND PAIR OF REDUCED DIAMETER PORTIONS POSITIONED ON AXIALLY OPPOSITE SIDES OF SAID ANNULAR PORTIONS OF LARGE INTERNAL DIAMETER.
Claim 2
Independent Claim
195 words
THE METHOD OF MANUFACTURING A RECIPROCAL FOURWAY SPOOL VALVE HAVING A RECIPROCAL CORE COMPRISING A PAIR OF ANNULAR LAND PORTIONS SPACED BY AN ANNULAR REDUCED DIAMETER PORTION AND A HOUSING CO-OPERABLE THEREWITH COMPRISING A PAIR OF ANNULAR PORTIONS OF LARGE INTERNAL DIAMETER SPACED BY A FIRST ANNULAR PORTION OF REDUCED INTERNAL DIAMETER AND WHICH IN TURN SPACED A SECOND PAIR OF REDUCED DIAMETER PORTIONS, WHICH CONSISTS OF FORMING EACH OF SAID PORTIONS AS A SEPARATE ANNULAR MEMBER AND MACHINING SAID PAIR OF ANNULAR LAND PORTIONS AND SAID FIRST ANNULAR PORTION OF REDUCED INTERNAL DIAMETER SIMULTANEOUSLY TO THE SAME THICKNESS AND LIKEWISE MACHINING SAID PAIR OF ANNULAR PORTIONS OF LARGE INTERNAL DIAMETER AND THE ANNULAR REDUCED DIAMETER PORTION OF SAID CORE SIMULTANEOUSLY TO A SECOND SAME THICKNESS AND ASSEMBLING SAID CORE AND HOUSING TOGETHER WITH THE ANNULAR LANDS OF THE CORE IN FACE-TO-FACE CORRELATION WITH THE HOUSING PORTIONS OF LARGE INTERNAL DIAMETER AND WITH THE REDUCED DIAMETER PORTION OF THE CORE IN FACE-TO-FACE RELATION WITH THE FIRST REDUCED INTERNAL DIAMETER PORTION OF THE HOUSING AND WITH THE SECOND PAIR OF REDUCED DIAMETER PORTIONS POSITIONED ON AXIALLY OPPOSITE SIDES OF SAID ANNULAR PORTIONS OF LARGE INTERNAL DIAMETER.
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |