US3272089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for compressing or expanding a medium
Assignee: US Philips Corp
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Filing: 1964-11-12
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Granted: 1966-09-13
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Expires: 1984-11-12
Abstract
No abstract record available.
Inventors
- 👤 Rietdijk Johan Adriaan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:04
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/06; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/0535; F04; F04B; F04B39/00; F04B39/04; F04B39/041; F04B39/044; F04B39/12; F04B39/128; F04B53/00; F04B53/14; F04B53/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
A DEVICE FOR COMPRESSING AND EXPANDING A MEDIUM COMPRISING CYLINDER MEANS, FIRST AND SECOND PISTON-LIKE BODIES ADAPTED TO RECIPROCATE IN SAID CYLINDER MEANS, A DRIVING GEAR CONNECTED TO SAID SECOND PISTON-LIKE BODY, SAID CYLINDER MEANS AND SAID FIRST PISTON-LIKE BODY DEFINING A WORK SPACE, SAID FIRST PISTON-LIKE BODY VARYING THE VOLUME OF SAID WORK SPACE WHEN THE SAME IS RECIPROCATED A LIQUID COLUMN BETWEEN SAID FIRST AND SECOND PISTON-LIKE BODIES AND ENGAGING THE SIDE OF SAID FIRST PISTON-LIKE BODY REMOTE FROM SAID WORK SPACE, A ROLLING MEMBRANE SEAL BETWEEN SAID FIRST PISTON-LIKE BODY AND SAID CYLINDER MEANS AND BEING IN CONTACT AT LEAST ON ONE SIDE THEREOF WITH SAID LIQUID COLUMN, MEANS FOR MAINTAINING A PRESSURE DIFFERENCE ON SAID ROLLING MEMBRANE THAT IS SUBSTANTIALLY CONSTANT, SAID FIRST PISTON-LIKE BODY, BEING PROVIDED WITH A SHEATH-LIKE ELEMENT EXTENDING IN THE DIRECTION OF SAID SECOND PISTON-LIKE BODY, AND A RESILIENT, DEFORMABLE SEALING ELEMENT AT LEAST PARTIALLY SURROUNDING SAID SECOND PISTON-LIKE BODY AND WHICH HAS AN OUTER DIAMETER THAT IS SMALLER THAN THE INNER DIAMETER OF THE ADJACENT WALL OF SAID CYLINDER MEANS, SAID SHEATH-LIKE ELEMENT HAVING SUCH A LENGTH THAT AT THE MINIMUM PERMISSIBLE DISTANCE BETWEEN SAID TWO PISTON-LIKE BODIES SAID SHEATH-LIKE ELEMENT DEFORMS SAID SEALING ELEMENT WHEREBY A SEAL IS EFFECTED BETWEEN SAID SECOND PISTON-LIKE BODY AND THE ADJACENT WALL OF THE CYLINDER MEANS.
Claim 2
Independent Claim
222 words
A DEVICE FOR COMPRESSING AND EXPANDING A MEDIUM COMPRISING CYLINDER MEANS, FIRST AND SECOND PISTON-LIKE BODIES ADAPTED TO RECIPROCATE IN SAID CYLINDER MEANS, A DRIVING GEAR CONNECTED TO SAID SECOND PISTON-LIKE BODY, SAID CYLINDER MEANS AND SAID FIRST PISTON-LIKE BODY DEFINING A WORK SPACE, SAID FIRST PISTON-LIKE BODY VARYING THE VOLUME OF SAID WORK SPACE WHEN THE SAME IS RECIPROCATED A LIQUID COLUMN BETWEEN SAID FIRST AND SECOND PISTON-LIKE BODIES AND ENGAGING THE SIDE OF SAID FIRST PISTON-LIKE BODY REMOTE FROM SAID WORK SPACE, A ROLLING MEMBRANE SEAL BETWEEN SAID FIRST PISTON-LIKE BODY AND SAID CYLINDER MEANS AND BEING IN CONTACT AT LEAST ON ONE SIDE THEREOF WITH SAID LIQUID COLUMN, MEANS FOR MAINTAINING A PRESSURE DIFFERENCE ON SAID ROLLING MEMBRANE THAT IS SUBSTANTIALLY CONSTANT, SAID FIRST PISTON-LIKE BODY, BEING PROVIDED WITH A SHEATH-LIKE ELEMENT EXTENDING IN THE DIRECTION OF SAID SECOND PISTON-LIKE BODY, AND A RESILIENT, DEFORMABLE SEALING ELEMENT AT LEAST PARTIALLY SURROUNDING SAID SECOND PISTON-LIKE BODY AND WHICH HAS AN OUTER DIAMETER THAT IS SMALLER THAN THE INNER DIAMETER OF THE ADJACENT WALL OF SAID CYLINDER MEANS, SAID SHEATH-LIKE ELEMENT HAVING SUCH A LENGTH THAT AT THE MINIMUM PERMISSIBLE DISTANCE BETWEEN SAID TWO PISTON-LIKE BODIES SAID SHEATH-LIKE ELEMENT DEFORMS SAID SEALING ELEMENT WHEREBY A SEAL IS EFFECTED BETWEEN SAID SECOND PISTON-LIKE BODY AND THE ADJACENT WALL OF THE CYLINDER MEANS.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |