Patent US3204858A successfully refreshed from Google Patents.
US3204858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston cylinder means with fluid-coupled drive means and rolling diaphragm seal
Assignee: US Philips Corp
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Filing: 1963-06-21
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Granted: 1965-09-07
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Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Dros Albert August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:17
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F04B53/142; F04B39/00; F04B39/04; F04B39/041; F04B39/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PISTON CYLINDER MEANS COMPRISING A CYLINDER, A DRIVE PISTON, DRIVING MEANS FOR RECIPROCATING SAID DRIVE PISTON IN SAID CYLINDER, A DRIVEN PISTON ADAPTED FOR RECIPROCATING IN SAID CYLINDER, SAID DRIVEN PISTON DEFINING WITH SAID CYLINDER TWO SPACES, A ROLLING DIAPHRAGM SEAL BETWEEN SAID DRIVEN PISTON AND ADJACENT PORTION OF SAID CYLINDER DIVIDING ONE OF SAID SPACES INTO AN AUXILIARY SPACED FILLED WITH A LIQUID, WHILE THE OTHER PART OF SAID ONE SPACE CONTAINS A GAS, AND THE OTHER OF SAID SPACES CONTAINING A DISPLACEABLE COLUMN OF LIQUID WHICH CONSTITUTES THE DRIVING COUPLING BETWEEN SAID DRIVE PISTON AND SAID DRIVEN PISTON.
Claim 2
Dependent Claim
101 words
A PISTON CYLINDER MEANS COMPRISING A CYLINDER, A DRIVE PISTON, DRIVING MEANS FOR RECIPROCATING SAID DRIVE PISTON IN SAID CYLINDER, A DRIVEN PISTON ADAPTED FOR RECIPROCATING IN SAID CYLINDER, SAID DRIVEN PISTON DEFINING WITH SAID CYLINDER TWO SPACES, A ROLLING DIAPHRAGM SEAL BETWEEN SAID DRIVEN PISTON AND ADJACENT PORTION OF SAID CYLINDER DIVIDING ONE OF SAID SPACES INTO AN AUXILIARY SPACED FILLED WITH A LIQUID, WHILE THE OTHER PART OF SAID ONE SPACE CONTAINS A GAS, AND THE OTHER OF SAID SPACES CONTAINING A DISPLACEABLE COLUMN OF LIQUID WHICH CONSTITUTES THE DRIVING COUPLING BETWEEN SAID DRIVE PISTON AND SAID DRIVEN PISTON.
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |