US4181155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure energy accumulator
Assignee: US Philips Corp
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Filing: 1978-06-13
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Granted: 1980-01-01
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Expires: 1998-06-13
Abstract
Abstract A pressure energy accumulator having a mixture consisting of CF 4 or C 2 F 6 and N 2 , H 2 , or He, or a combination thereof, as the gaseous working medium.
Inventors
- 👤 Gustaaf A. Wesselink
- 👤 Adrianus J. J. Franken
- 👤 Hendricus F. G. Smulders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:40
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F16; F16D; F16D61/00; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/315; F15B2201/3152; F15B2201/40; F15B2201/41; F15B2201/415; F15B2201/4155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A pressure energy accumulator comprising a reservoir containing a hydraulic liquid and a gaseous working medium separated by a movable flexible partition to permit the gaseous working medium to be compressed, said gaseous working medium consisting at least substantially entirely of a mixture of: CF 4 and N 2 having a least 5 and at most 80 mol% N 2 ; CF 4 and H 2 having at least 5 and at most 85 mol% H 2 ; CF 4 and He having at least 5 and at most 85 mol% He; C 2 F 6 and N 2 having at least 40 and at most 90 mol% N 2 ; C 2 F 6 and H 2 having at least 20 and at most 90 mol% H 2 ; C 2 F 6 and He having at least 20 and at most 90 mol% He; or a combination thereof.
Claim 2
Dependent Claim
150 words
A pressure energy accumulator comprising a reservoir containing a hydraulic liquid and a gaseous working medium separated by a movable flexible partition to permit the gaseous working medium to be compressed, said gaseous working medium consisting at least substantially entirely of a mixture of: CF 4 and N 2 having a least 5 and at most 80 mol% N 2 ; CF 4 and H 2 having at least 5 and at most 85 mol% H 2 ; CF 4 and He having at least 5 and at most 85 mol% He; C 2 F 6 and N 2 having at least 40 and at most 90 mol% N 2 ; C 2 F 6 and H 2 having at least 20 and at most 90 mol% H 2 ; C 2 F 6 and He having at least 20 and at most 90 mol% He; or a combination thereof.
References Cited (Backward Citations)
US3023786A
Cited
US4077100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |