US3241379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device of the kind comprising rolling diaphragm seals between two relatively reciprocating coaxial elements
Assignee: US Philips Corp
•
Filing: 1962-06-12
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Granted: 1966-03-22
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Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 Rietdijk Johan Adriaan
- 👤 Herman Henricus Maria Van D Aa
- 👤 Henricus Cornelis Joha Beukeri
- 👤 Meijer Roelf Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:04
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A DEVICE COMPRISING TWO RELATIVELY RECIPROCATING COAXIAL ELEMENTS, A MOVABLE DIAPHRAGM SEAL HAVING THE ENDS THEREOF SECURED TO SAID ELEMENTS AND FORMING A SEPARATED UPPER AND LOWER SPACE, ONE OF SAID SPACES BEING FILLED WITH A SUBSTANTIALLY INCOMPRESSIBLE MEDIUM AND THE OTHER OF SAID SPACES HAVING A GASEOUS MEDIUM, AND THE BOUNDARIES OF SAID ONE SPACE HAVING SAID SUBSTANTIALLY INCOMPRESSIBLE MEDIUM BEING FORMED ON ONE SIDE BY SAID MOVABLE DIAPHRAGM SEAL AND ON THE OTHER SIDE BY THE RIGID WALL PORTIONS OF AT LEAST ONE OF SAID RELATIVELY RECIPROCATING ELEMENTS, SAID RIGID WALL PORTIONS BEING SHAPED AND DIMENSIONED IN SUCH A FORM THAT THE VOLUME OF SAID ONE SPACE REMAINS CONSTANT DURING THE MOVEMENT OF SAID RELATIVELY RECIPROCATING ELEMENTS DUE SOLELY TO SAID SHAPE AND DIMENSIONS, AND THE LENGTH OF SAID DIAPHRAGM SEAL REMAINS CONSTANT.
Claim 2
Independent Claim
135 words
A DEVICE COMPRISING TWO RELATIVELY RECIPROCATING COAXIAL ELEMENTS, A MOVABLE DIAPHRAGM SEAL HAVING THE ENDS THEREOF SECURED TO SAID ELEMENTS AND FORMING A SEPARATED UPPER AND LOWER SPACE, ONE OF SAID SPACES BEING FILLED WITH A SUBSTANTIALLY INCOMPRESSIBLE MEDIUM AND THE OTHER OF SAID SPACES HAVING A GASEOUS MEDIUM, AND THE BOUNDARIES OF SAID ONE SPACE HAVING SAID SUBSTANTIALLY INCOMPRESSIBLE MEDIUM BEING FORMED ON ONE SIDE BY SAID MOVABLE DIAPHRAGM SEAL AND ON THE OTHER SIDE BY THE RIGID WALL PORTIONS OF AT LEAST ONE OF SAID RELATIVELY RECIPROCATING ELEMENTS, SAID RIGID WALL PORTIONS BEING SHAPED AND DIMENSIONED IN SUCH A FORM THAT THE VOLUME OF SAID ONE SPACE REMAINS CONSTANT DURING THE MOVEMENT OF SAID RELATIVELY RECIPROCATING ELEMENTS DUE SOLELY TO SAID SHAPE AND DIMENSIONS, AND THE LENGTH OF SAID DIAPHRAGM SEAL REMAINS CONSTANT.
References Cited (Backward Citations)
US2178953A
Cited
US2864258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |