US3382894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration valve and method and apparatus for making it
Assignee: Danfoss Chatleff Inc
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Filing: 1966-04-11
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Granted: 1968-05-14
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Expires: 1986-04-11
Abstract
No abstract record available.
Inventors
- 👤 Shurtleff Louis Charles
- 👤 O O Shurtleff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:40
CPC Classifications
F; F16; F16K; F16K49/00; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; F16K1/385; F16K51/00; F16K51/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879; Y10T137/86895
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
A REFRIGERATION VALVE COMPRISING A TUBULAR BODY HAVING AN AXIAL PORT IN ITS FRONT END AND A SIDE PORT BEHIND THE END PORT, THE INSIDE OF SAID BODY BEING ENLARGED BETWEEN SAID PORTS TO FORM A VALVE CHAMBER HAVING FRONT AND REAR VALVE SEATS FACING EACH OTHER BETWEEN THE PORTS, A ROTATABLE VALVE STEM THREADED IN THE TUBULAR BODY BEHIND THE REAR VALVE SEAT AND PROJECTING FROM THE REAR END OF THE BODY, A ONE-PIECE HEAD IN SAID CHAMBER JOINED TO THE FRONT END OF SAID STEM AND HAVING A PAIR OF AXIALLY SPACED ANNULAR GROOVES THEREIN WITH INNER AND OUTER RADIAL SIDE WALLS CONNECTED BY CIRCULAR INNER END WALLS, AND TETRAFLUOROETHYLENE RESIN SEALING RINGS MOUNTED IN SAID GROOVES IN ENGAGEMENT WITH SAID INNER END WALLS AND PROJECTING RADIALLY FROM THE GROOVES, ONE OF SAID RINGS BEING ENGAGEABLE WITH THE REAR VALVE SEAT TO CLOSE SAID SIDE PORT WHEN THE STEM HEAD IS MOVED TO THE BACK OF SAID CHAMBER, AND THE OTHER RING BEING ENGAGEABLE WITH THE FRONT VALVE SEAT TO CLOSE SAID END PORT WHEN SAID HEAD IS MOVED FORWARD IN THE CHAMBER, SAID BODY HAVING A SECOND SIDE PORT OPENING INTO SAID CHAMBER BETWEEN THE FRONT AND REAR POSITIONS OF THE STEM HEAD.
Claim 2
Dependent Claim
206 words
A REFRIGERATION VALVE COMPRISING A TUBULAR BODY HAVING AN AXIAL PORT IN ITS FRONT END AND A SIDE PORT BEHIND THE END PORT, THE INSIDE OF SAID BODY BEING ENLARGED BETWEEN SAID PORTS TO FORM A VALVE CHAMBER HAVING FRONT AND REAR VALVE SEATS FACING EACH OTHER BETWEEN THE PORTS, A ROTATABLE VALVE STEM THREADED IN THE TUBULAR BODY BEHIND THE REAR VALVE SEAT AND PROJECTING FROM THE REAR END OF THE BODY, A ONE-PIECE HEAD IN SAID CHAMBER JOINED TO THE FRONT END OF SAID STEM AND HAVING A PAIR OF AXIALLY SPACED ANNULAR GROOVES THEREIN WITH INNER AND OUTER RADIAL SIDE WALLS CONNECTED BY CIRCULAR INNER END WALLS, AND TETRAFLUOROETHYLENE RESIN SEALING RINGS MOUNTED IN SAID GROOVES IN ENGAGEMENT WITH SAID INNER END WALLS AND PROJECTING RADIALLY FROM THE GROOVES, ONE OF SAID RINGS BEING ENGAGEABLE WITH THE REAR VALVE SEAT TO CLOSE SAID SIDE PORT WHEN THE STEM HEAD IS MOVED TO THE BACK OF SAID CHAMBER, AND THE OTHER RING BEING ENGAGEABLE WITH THE FRONT VALVE SEAT TO CLOSE SAID END PORT WHEN SAID HEAD IS MOVED FORWARD IN THE CHAMBER, SAID BODY HAVING A SECOND SIDE PORT OPENING INTO SAID CHAMBER BETWEEN THE FRONT AND REAR POSITIONS OF THE STEM HEAD.
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |