Patent US3073513A successfully refreshed from Google Patents.
US3073513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressor
Assignee: Svenska Rotor Maskiner AB
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Filing: 1960-04-26
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Granted: 1963-01-15
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Expires: 1980-04-26
Abstract
No abstract record available.
Inventors
- 👤 Bailey Wilfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:35
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/08; F04C18/12; F04C18/14; F04C18/16; F04C29/00; F04C29/0007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A ROTARY COMPRESSOR COMPRISING A CASING HAVING A WORKING CHAMBER EXTENDING LONGITUDINALLY IN SAID CASING AND FORMED OF A PAIR OF INTERSECTING BORES, SAID CASING HAVING AN INLET PORT COMMUNICATING WITH ONE END OF SAID CHAMBER, SAID CASING HAVING AN OUTLET PORT PROVIDING A DISCHARGE FROM SAID CHAMBER, A MALE ROTOR POSITIONED IN ONE OF SAID BORES, A FEMALE ROTOR POSITIONED IN THE OTHER OF SAID BORES, SAID MALE ROTOR HAVING SPIRAL LOBES, SAID FEMALE ROTOR HAVING SPIRAL GROOVES EACH RECEIVING IN SLIGHTLY SPACED INTERMESHING RELATION ONE OF SAID LOBES, SAID ROTORS BEING SLIGHTLY SPACED FROM THE WALLS OF THEIR RESPECTIVE BORES, AND SEPARATE MEANS OPERABLE UPON OPERATION OF THE COMPRESSOR FOR SUPPLYING A LUBRICATING AND COOLING FLUID TO SAID CHAMBER TO FILL THE SPACES BETWEEN SAID LOBES AND THE WALLS OF SAID GROOVES, SAID FLUID DISPOSED IN THE SPACE BETWEEN SAID LOBES AND THE WALLS OF SAID GROOVES
Claim 2
Dependent Claim
149 words
A ROTARY COMPRESSOR COMPRISING A CASING HAVING A WORKING CHAMBER EXTENDING LONGITUDINALLY IN SAID CASING AND FORMED OF A PAIR OF INTERSECTING BORES, SAID CASING HAVING AN INLET PORT COMMUNICATING WITH ONE END OF SAID CHAMBER, SAID CASING HAVING AN OUTLET PORT PROVIDING A DISCHARGE FROM SAID CHAMBER, A MALE ROTOR POSITIONED IN ONE OF SAID BORES, A FEMALE ROTOR POSITIONED IN THE OTHER OF SAID BORES, SAID MALE ROTOR HAVING SPIRAL LOBES, SAID FEMALE ROTOR HAVING SPIRAL GROOVES EACH RECEIVING IN SLIGHTLY SPACED INTERMESHING RELATION ONE OF SAID LOBES, SAID ROTORS BEING SLIGHTLY SPACED FROM THE WALLS OF THEIR RESPECTIVE BORES, AND SEPARATE MEANS OPERABLE UPON OPERATION OF THE COMPRESSOR FOR SUPPLYING A LUBRICATING AND COOLING FLUID TO SAID CHAMBER TO FILL THE SPACES BETWEEN SAID LOBES AND THE WALLS OF SAID GROOVES, SAID FLUID DISPOSED IN THE SPACE BETWEEN SAID LOBES AND THE WALLS OF SAID GROOVES
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |