Patent US4676747A successfully refreshed from Google Patents.
Patent US3184155A successfully refreshed from Google Patents.
US3184155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor compressor unit
Assignee: Cooper Bessemer Corp
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Filing: 1963-04-17
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Granted: 1965-05-18
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Expires: 1983-04-17
Abstract
No abstract record available.
Inventors
- 👤 William R Crooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:47
CPC Classifications
F; F04; F04C; F04C23/00; F04C23/001; F04C18/00; F04C18/08; F04C18/12; F04C18/14; F04C18/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
IN A COMBINATION MOTOR AND HIGH PRESSURE FLUID PUMPING DEVICE: A HOUSING HAVING A MOTOR CHAMBER AND A PUMPING CHAMBER SPACED APART IN END TO END RELATIONSHIP THEREIN, A PAIR OF SHAFTS EXTENDING LONGITUDINALLY THROUGH BOTH OF SAID MOTOR AND PUMPING CHAMBERS, SAID SHAFTS BEING TOTALLY CONFINED WITHIN SAID HOUSING WITH NO EXTERNAL MECHANICAL CONNECTIONS, A FIRST PAIR OF MESHING GENERALLY HELICAL AXIAL FLOW SCREW TYPE ROTOR MEMBERS IN SAID MOTOR CHAMBER WITH RESPECTIVE ONES OF SAID ROTOR MEMBERS ON RESPECTIVE ONES OF SAID SHAFTS, A SECOND PAIR OF MESHING GENERALLY HELICAL AXIAL FLOW SCREW TYPE ROTOR MEMBERS IN SAID PUMPING CHAMBER WITH RESPECTIVE ONES OF SAID ROTOR MEMBERS ON RESPECTIVE ONES OF SAID SHAFTS, MEANS SUPPLYING HIGH PRESSURE HYDRAULIC FLUID ADJACENT A FIRST END OF SAID MESHING HELICAL SCREW TYPE ROTOR MEMBERS OF SAID MOTOR CHAMBER AND REMOVING LOWER PRESSURE FROM THE OPPOSITE END OF SAID MESHING HELICAL SCREW TYPE ROTOR MEMBERS OF SAID MOTOR CHAMBER, MEANS SUPPLYING LOW PRESSURE FLUID ADJACENT A FIRST END OF SAID MESHING HELICAL SCREW TYPE ROTOR MEMBERS OF SAID PUMPING CHAMBER AND DISCHARGING HIGH PRESSURE FLUID AT THE OPPOSITE END OF
Claim 2
Dependent Claim
188 words
IN A COMBINATION MOTOR AND HIGH PRESSURE FLUID PUMPING DEVICE: A HOUSING HAVING A MOTOR CHAMBER AND A PUMPING CHAMBER SPACED APART IN END TO END RELATIONSHIP THEREIN, A PAIR OF SHAFTS EXTENDING LONGITUDINALLY THROUGH BOTH OF SAID MOTOR AND PUMPING CHAMBERS, SAID SHAFTS BEING TOTALLY CONFINED WITHIN SAID HOUSING WITH NO EXTERNAL MECHANICAL CONNECTIONS, A FIRST PAIR OF MESHING GENERALLY HELICAL AXIAL FLOW SCREW TYPE ROTOR MEMBERS IN SAID MOTOR CHAMBER WITH RESPECTIVE ONES OF SAID ROTOR MEMBERS ON RESPECTIVE ONES OF SAID SHAFTS, A SECOND PAIR OF MESHING GENERALLY HELICAL AXIAL FLOW SCREW TYPE ROTOR MEMBERS IN SAID PUMPING CHAMBER WITH RESPECTIVE ONES OF SAID ROTOR MEMBERS ON RESPECTIVE ONES OF SAID SHAFTS, MEANS SUPPLYING HIGH PRESSURE HYDRAULIC FLUID ADJACENT A FIRST END OF SAID MESHING HELICAL SCREW TYPE ROTOR MEMBERS OF SAID MOTOR CHAMBER AND REMOVING LOWER PRESSURE FROM THE OPPOSITE END OF SAID MESHING HELICAL SCREW TYPE ROTOR MEMBERS OF SAID MOTOR CHAMBER, MEANS SUPPLYING LOW PRESSURE FLUID ADJACENT A FIRST END OF SAID MESHING HELICAL SCREW TYPE ROTOR MEMBERS OF SAID PUMPING CHAMBER AND DISCHARGING HIGH PRESSURE FLUID AT THE OPPOSITE END OF
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) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |