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US3331329A
Expired / Lapsed
US
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Single acting twin cylinder pump or compressor
Assignee: Burckhardt Compression AG
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Filing: 1965-08-23
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Granted: 1967-07-18
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Expires: 1985-08-23
Abstract
No abstract record available.
Inventors
- 👤 Bauer Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:03
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/117; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F04B9/1176
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A HIGH PRESSURE PUMP OR COMPRESSOR COMPRISING TWO SINGLE ACTING WORKING CYLINDERS, A WORKING PISTON IN EACH WORKING CYLINDER, AN INDEPENDENT DRIVING PISTON DRIVING EACH SAID WORKING PISTON, MEANS PROVIDING A CONSTANT SUPPLY OF HYDRAULIC PRESSURE MEDIUM, MEANS APPLYING THE SUPPLY OF HYDRAULIC PRESSURE MEDIUM SOLELY FOR EFFECTING THE WORKING STROKE OF EACH DRIVING PISTON, MEANS CONTROLLING THE FLOW OF SAID MEDIUM SO THAT THE WORKING STROKES OF SAID DRIVING PISTONS ARE OVER-LAPPED IN TIME AND THE SUM OF THE SPEEDS OF SAID DRIVING PISTONS REMAINS CONSTANT, MEANS FOR EFFECTING THE RETURN STROKES OF THE DRIVING PISTONS AT A HIGHER SPEED THAN THE WORKING STROKES, EACH DRIVING PISTON HAVING A SMALLER SURFACE THAN THE SURFACE UPON WHICH SAID MEDIUM WORKS DURING THE WORKING STROKE, THE SURFACE OF EACH DRIVING PISTON OPPOSITE THAT ON WHICH SAID HYDRAULIC MEDIUM ACTS, DURING THE WORKING STROKE, DISPLACING A LIQUID WHICH ACTS ON SAID
Claim 2
Dependent Claim
149 words
A HIGH PRESSURE PUMP OR COMPRESSOR COMPRISING TWO SINGLE ACTING WORKING CYLINDERS, A WORKING PISTON IN EACH WORKING CYLINDER, AN INDEPENDENT DRIVING PISTON DRIVING EACH SAID WORKING PISTON, MEANS PROVIDING A CONSTANT SUPPLY OF HYDRAULIC PRESSURE MEDIUM, MEANS APPLYING THE SUPPLY OF HYDRAULIC PRESSURE MEDIUM SOLELY FOR EFFECTING THE WORKING STROKE OF EACH DRIVING PISTON, MEANS CONTROLLING THE FLOW OF SAID MEDIUM SO THAT THE WORKING STROKES OF SAID DRIVING PISTONS ARE OVER-LAPPED IN TIME AND THE SUM OF THE SPEEDS OF SAID DRIVING PISTONS REMAINS CONSTANT, MEANS FOR EFFECTING THE RETURN STROKES OF THE DRIVING PISTONS AT A HIGHER SPEED THAN THE WORKING STROKES, EACH DRIVING PISTON HAVING A SMALLER SURFACE THAN THE SURFACE UPON WHICH SAID MEDIUM WORKS DURING THE WORKING STROKE, THE SURFACE OF EACH DRIVING PISTON OPPOSITE THAT ON WHICH SAID HYDRAULIC MEDIUM ACTS, DURING THE WORKING STROKE, DISPLACING A LIQUID WHICH ACTS ON SAID
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |