Patent US3216334A successfully refreshed from Google Patents.
US3216334A
Expired / Lapsed
US
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Gas compressors
Assignee: Burckhardt Compression AG
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Filing: 1964-03-02
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Granted: 1965-11-09
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Bauer Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:40
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/04; F04B39/0005; F04B39/02; F04B39/0284; F04B39/0292; F04B39/041; F04B39/042; F16; F16J; F16J15/00; F16J15/16; F16J15/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
MEANS FOR SEALING THE CLEARANCE BETWEEN THE PISTON AND CYLINDER OF A GAS COMPRESSOR HAVING A CYLINDER WITH A GAS COMPRESSION SPACE THEREIN AND A COMPRESSOR PISTON RECIPROCATING WITH FINE CLEARANCE IN SAID CYLINDER TO COMPRESS GAS INTO SAID SPACE, COMPRISING A SUBSTANTIAL RESERVE OF LUBRICANT STORED IN FRONT OF AND IN COMMUNICATION WITH THE CLEARANCE BETWEEN SAID PISTON AND CYLINDER, MEANS SEPARATING SAID RESERVE FROM SAID GAS COMPRESSION SPACE AND ENABLING THE VOLUME OF SAID RESERVE TO VARY WITHIN LIMITS, AND MEANS FOR REPLACING FROM OUTSIDE SAID CYLINDER, LUBRICANT LOST FROM SAID RESERVE BY LEAKAGE THROUGH SAID CLEARANCE.
Claim 2
Dependent Claim
99 words
MEANS FOR SEALING THE CLEARANCE BETWEEN THE PISTON AND CYLINDER OF A GAS COMPRESSOR HAVING A CYLINDER WITH A GAS COMPRESSION SPACE THEREIN AND A COMPRESSOR PISTON RECIPROCATING WITH FINE CLEARANCE IN SAID CYLINDER TO COMPRESS GAS INTO SAID SPACE, COMPRISING A SUBSTANTIAL RESERVE OF LUBRICANT STORED IN FRONT OF AND IN COMMUNICATION WITH THE CLEARANCE BETWEEN SAID PISTON AND CYLINDER, MEANS SEPARATING SAID RESERVE FROM SAID GAS COMPRESSION SPACE AND ENABLING THE VOLUME OF SAID RESERVE TO VARY WITHIN LIMITS, AND MEANS FOR REPLACING FROM OUTSIDE SAID CYLINDER, LUBRICANT LOST FROM SAID RESERVE BY LEAKAGE THROUGH SAID CLEARANCE.
References Cited (Backward Citations)
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Cited
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US1768633A
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |