Patent US3286911A successfully refreshed from Google Patents.
US3286911A
Expired / Lapsed
US
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Compressors
Assignee: BOC Group Ltd
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Filing: 1965-09-01
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Granted: 1966-11-22
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Expires: 1985-09-01
Abstract
No abstract record available.
Inventors
- 👤 Clarke Michael Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:25
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/005; F04B25/00; F04B25/005; F04B35/00; F04B35/04; F04B35/045; H; H02; H02K; H02K33/00; H02K33/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A COMPRESSOR: A FIRST CYLINDER; A SECOND CYLINDER REGIDLY CONNECTED TO AND LOCATED IN ALIGNMENT WITH SAID FIRST CYLINDER; TWO PISTONS LOCATED ONE IN EACH OF SAID CYLINDERS; SPRING MEANS CONNECTED TO THE PISTONS; MEANS PRODUCING TWO MAGNETIC FIELDS SUBSTANTIALLY RADIAL OF THE AXIS OF THE CYLINDERS AND THROUGH A PORTION OF EACH PISTON; TWO COILS LOCATED ONE IN EACH OF THE RADIAL MAGNETIC FIELDS AND COAXIAL WITH AND RIGIDLY CONNECTED ONE TO EACH OF SAID PISTONS AND CO-OPERATING WITH SAID MEANS PRODUCING TWO MAGNETIC FIELDS SUBSTANTIALLY RADIALLY OF THE AXIS OF THE CYLINDERS WHEN ELECTRIC CURRENT IS APPLIED TO THE COILS TO FORM TWO LINEAR MPTORS RECIPROCATING THE PISTONS IN ANTIPHASE RELATION; AND VALVE MEANS ALLOWING FLOW OF THE GAS TO BE COMPRESSED INTO EACH CYLINDER AND FLOW OF COMPRESSED GAS FROM EACH CYLINDER.
Claim 2
Dependent Claim
135 words
A COMPRESSOR: A FIRST CYLINDER; A SECOND CYLINDER REGIDLY CONNECTED TO AND LOCATED IN ALIGNMENT WITH SAID FIRST CYLINDER; TWO PISTONS LOCATED ONE IN EACH OF SAID CYLINDERS; SPRING MEANS CONNECTED TO THE PISTONS; MEANS PRODUCING TWO MAGNETIC FIELDS SUBSTANTIALLY RADIAL OF THE AXIS OF THE CYLINDERS AND THROUGH A PORTION OF EACH PISTON; TWO COILS LOCATED ONE IN EACH OF THE RADIAL MAGNETIC FIELDS AND COAXIAL WITH AND RIGIDLY CONNECTED ONE TO EACH OF SAID PISTONS AND CO-OPERATING WITH SAID MEANS PRODUCING TWO MAGNETIC FIELDS SUBSTANTIALLY RADIALLY OF THE AXIS OF THE CYLINDERS WHEN ELECTRIC CURRENT IS APPLIED TO THE COILS TO FORM TWO LINEAR MPTORS RECIPROCATING THE PISTONS IN ANTIPHASE RELATION; AND VALVE MEANS ALLOWING FLOW OF THE GAS TO BE COMPRESSED INTO EACH CYLINDER AND FLOW OF COMPRESSED GAS FROM EACH CYLINDER.
References Cited (Backward Citations)
FR978600A
Cited
US2872101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |