Patent US3555844A successfully refreshed from Google Patents.
US3555844A
Expired / Lapsed
US
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Anti-surge compressor capacity control
Assignee: York International Corp
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Filing: 1969-01-02
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Granted: 1971-01-19
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Expires: 1989-01-02
Abstract
Abstract APPARATUS FOR CONTROLLING THE OPERATION OF A CENTRIFUGAL COMPRESSOR BY DERIVING A SIGNAL FROM THE HIGH SIDE OF THE SYSTEM AND USING SUCH SIGNAL TO RESET THE CONTROL POINT WHICH LIMITS CLOSING OF THE PRV AND INITIATES BYPASSING DISCHARGE GAS. AT LOWER CAPACITY, THE SYSTEM OPERATES CLOSE TO THE SURGE LINE ASSURING MAXIMUM ECONOMY.
Inventors
- 👤 Joseph E Fleckenstein
- 👤 Frank A Kimpel
- 👤 Leo J Ormanoski
- 👤 Herman E Paetow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:13
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F04; F04D; F04D27/00; F04D27/02; F04D27/0207; F25B49/00; F25B49/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |