US3101187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure operated piston valve
Assignee: Wagner Electric Corp
•
Filing: 1960-09-12
•
Granted: 1963-08-20
•
Expires: 1980-09-12
Abstract
No abstract record available.
Inventors
- 👤 Phillip B Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:39
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; F16; F16K; F16K31/00; F16K31/12; F16K31/122; F16K31/1221; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A COMPRESSOR UNLOADING VALVE COMPRISING A HOUSING HAVING A BORE THEREIN, AXIALLY ALIGNED EXHAUST AND UNLOADING PORTS INTERSECTING SAID BORE NEAR THE MID-PORTION THEREOF, PISTON MEANS SLIDABLE IN SAID BORE, OPPOSED ENDS ON SAID PISTON MEANS HAVING DIFFERENT END AREAS, EXPANSIBLE CHAMBERS IN SAID BORE ADJACENT SAID ENDS, CONTROL PORTS CONNECTED WITH SAID CHAMBERS, A DEFORMABLE SLEEVE LOOSELY MOUNTED ON SAID PISTON MEANS, AND A REDUCED PORTION ON SAID PISTON MEANS BETWEEN SAID SLEEVE AND ONE OF SAID ENDS, SAID PISTON MEANS BEING MOVABLE TO POSITION SAID REDUCED PORTION IN ALIGNMENT WITH SAID EXHAUST AND UNLOADING PORTS TO OPEN COMMUNICATION THEREBETWEEN WHEN THE PRESSURES IN SAID CHAMBERS ARE SUBUSTANTIALLY EQUAL, AND SAID PISTON MEANS BEING MOVABLE TO POSITION SAID SLEEVE IN SEALING ENGAGEMENT BETWEEN SAID EXHAUST AND UNLOADING PORTS TO CLOSE COMMUNICATION THEREBETWEEN IN RESPONSE ONLY TO A PREDETERMINED FLUID PRESSURE DIFFERENTIAL BETWEEN SAID CHAMBERS.
Claim 2
Dependent Claim
145 words
A COMPRESSOR UNLOADING VALVE COMPRISING A HOUSING HAVING A BORE THEREIN, AXIALLY ALIGNED EXHAUST AND UNLOADING PORTS INTERSECTING SAID BORE NEAR THE MID-PORTION THEREOF, PISTON MEANS SLIDABLE IN SAID BORE, OPPOSED ENDS ON SAID PISTON MEANS HAVING DIFFERENT END AREAS, EXPANSIBLE CHAMBERS IN SAID BORE ADJACENT SAID ENDS, CONTROL PORTS CONNECTED WITH SAID CHAMBERS, A DEFORMABLE SLEEVE LOOSELY MOUNTED ON SAID PISTON MEANS, AND A REDUCED PORTION ON SAID PISTON MEANS BETWEEN SAID SLEEVE AND ONE OF SAID ENDS, SAID PISTON MEANS BEING MOVABLE TO POSITION SAID REDUCED PORTION IN ALIGNMENT WITH SAID EXHAUST AND UNLOADING PORTS TO OPEN COMMUNICATION THEREBETWEEN WHEN THE PRESSURES IN SAID CHAMBERS ARE SUBUSTANTIALLY EQUAL, AND SAID PISTON MEANS BEING MOVABLE TO POSITION SAID SLEEVE IN SEALING ENGAGEMENT BETWEEN SAID EXHAUST AND UNLOADING PORTS TO CLOSE COMMUNICATION THEREBETWEEN IN RESPONSE ONLY TO A PREDETERMINED FLUID PRESSURE DIFFERENTIAL BETWEEN SAID CHAMBERS.
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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) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |