Patent US3306523A successfully refreshed from Google Patents.
US3306523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure impulse transmitter
Assignee: Akerlund and Rausing AB
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Filing: 1965-06-28
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Granted: 1967-02-28
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Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 Nilsson Erling Ingvar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:45
CPC Classifications
F; F04; F04B; F04B7/00; F04B7/04; B; B41; B41F; B41F31/00; B41F31/02; B41F31/08; F04B39/00; F04B39/0005; F04B39/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A PRESSURE IMPULSE TRANSMITTER COMPRISING A POWER-OPERATED COMPRESSOR INCLUDING A CYLINDER, A CRANKCASE, AND A PISTON MOVABLE IN SAID CYLINDER; MEANS FOR COMMUNICATING THE CYLINDER WITH AT LEAST ONE PRESSURE IMPULSES-RECEIVING UNIT; MEANS FOR COMMUNICATING THE CYLINDER WITH ATMOSPHERE AT THE END OF THE COMPRESSION STROKE OF SAID PISTON AND INCLUDING AN ANNULAR GROOVE IN THE WALL OF SAID CYLINDER COMMUNICATING WITH THE INTERIOR OF SAID CYLINDER AND AN ANNULAR GROOVE IN SAID PISTON COMMUNICATING THROUGH SAID PISTON WITH THE CRANKCASE; SAID PISTON ANNULAR GROOVE BEING LOCATED SO AS TO BE OPPOSITE THE CYLINDER WALL ANNULAR GROOVE AT THE END OF THE COMPRESSION STROKE OF THE PISTON AND TO CONNECT THE INTERIOR OF THE CYLINDER WITH THE CRANKCASE; FLOW-RESISTANT MEANS CONNECTED BETWEEN SAID CYLINDER WALL ANNULAR GROOVE AND THE CRANKCASE; AND ADJUSTABLE VALVE MEANS FOR COMMUNICATING THE INTERIOR OF THE CYLINDER AT THE TOP THEREOF CONTINUOUSLY WITH THE CRANKCASE IN SERIES WITH SAID FLOW-RESISTANT MEANS, TO CONTROL THE DEGREE OF COMPRESSION ACHIEVED AT THE COMPRESSION STROKE OF THE PISTON.
Claim 2
Dependent Claim
169 words
A PRESSURE IMPULSE TRANSMITTER COMPRISING A POWER-OPERATED COMPRESSOR INCLUDING A CYLINDER, A CRANKCASE, AND A PISTON MOVABLE IN SAID CYLINDER; MEANS FOR COMMUNICATING THE CYLINDER WITH AT LEAST ONE PRESSURE IMPULSES-RECEIVING UNIT; MEANS FOR COMMUNICATING THE CYLINDER WITH ATMOSPHERE AT THE END OF THE COMPRESSION STROKE OF SAID PISTON AND INCLUDING AN ANNULAR GROOVE IN THE WALL OF SAID CYLINDER COMMUNICATING WITH THE INTERIOR OF SAID CYLINDER AND AN ANNULAR GROOVE IN SAID PISTON COMMUNICATING THROUGH SAID PISTON WITH THE CRANKCASE; SAID PISTON ANNULAR GROOVE BEING LOCATED SO AS TO BE OPPOSITE THE CYLINDER WALL ANNULAR GROOVE AT THE END OF THE COMPRESSION STROKE OF THE PISTON AND TO CONNECT THE INTERIOR OF THE CYLINDER WITH THE CRANKCASE; FLOW-RESISTANT MEANS CONNECTED BETWEEN SAID CYLINDER WALL ANNULAR GROOVE AND THE CRANKCASE; AND ADJUSTABLE VALVE MEANS FOR COMMUNICATING THE INTERIOR OF THE CYLINDER AT THE TOP THEREOF CONTINUOUSLY WITH THE CRANKCASE IN SERIES WITH SAID FLOW-RESISTANT MEANS, TO CONTROL THE DEGREE OF COMPRESSION ACHIEVED AT THE COMPRESSION STROKE OF THE PISTON.
References Cited (Backward Citations)
US384356A
Cited
US504093A
Cited
US679235A
Cited
US985013A
Cited
US1182372A
Cited
US1187031A
Cited
US1260100A
Cited
GB354857A
Cited
FR799663A
Cited
US2334939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |