Patent US3250459A successfully refreshed from Google Patents.
US3250459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear-rotor motor-compressor
Assignee: Ingersoll Rand Co
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Filing: 1964-06-15
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Granted: 1966-05-10
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Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Brown
- 👤 Julins A Naab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:35
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/08; F04C18/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A FLUID MOTOR-COMPRESSER DEVICE COMPRISING (A) A SHAFT HAVING AN ECCENTRIC PORTION, (B) A MOTOR CONNECTED TO ROTATIVELY DRIVE SAID SHAFT, (C) A FIRST ROTOR HAVING EXTERNAL TEETH JOURNALED ON SAID ECCENTRIC PORTION, (D) A SECOND ROTOR HAVING INTERNAL TEETH DISPOSED ECCENTRICALLY WITH RESPECT TO SAID FIRST ROTOR AND IN MESHING RELATION WITH THE TEETH OF SAID FIRST ROTOR, (E) A WALL MEANS DISPOSED ON OPPOSITE SIDES OF SAID ROTORS AND FIXED ON THE SHAFT TO ROTATE WITH THE LATTER, (F) FLUID INLET PORTS IN SAID WALL MEANS TO CONDUCT THE FLUID TO BE COMPRESSED INTO THE SPACED BETWEEN THE MESHING TEETH OF SAID FIRST AND SAID SECOND ROTORS, (G) FLUID OUTLEEWT PORTS IN SAID WALL MEANS TO RECEIVE THE COMPRESSED FLUID FROM THE SPACED BETWEEN THE MESHING TEETH OF THE FIRST AND SECOND ROTORS, AND
Claim 2
Dependent Claim
136 words
A FLUID MOTOR-COMPRESSER DEVICE COMPRISING (A) A SHAFT HAVING AN ECCENTRIC PORTION, (B) A MOTOR CONNECTED TO ROTATIVELY DRIVE SAID SHAFT, (C) A FIRST ROTOR HAVING EXTERNAL TEETH JOURNALED ON SAID ECCENTRIC PORTION, (D) A SECOND ROTOR HAVING INTERNAL TEETH DISPOSED ECCENTRICALLY WITH RESPECT TO SAID FIRST ROTOR AND IN MESHING RELATION WITH THE TEETH OF SAID FIRST ROTOR, (E) A WALL MEANS DISPOSED ON OPPOSITE SIDES OF SAID ROTORS AND FIXED ON THE SHAFT TO ROTATE WITH THE LATTER, (F) FLUID INLET PORTS IN SAID WALL MEANS TO CONDUCT THE FLUID TO BE COMPRESSED INTO THE SPACED BETWEEN THE MESHING TEETH OF SAID FIRST AND SAID SECOND ROTORS, (G) FLUID OUTLEEWT PORTS IN SAID WALL MEANS TO RECEIVE THE COMPRESSED FLUID FROM THE SPACED BETWEEN THE MESHING TEETH OF THE FIRST AND SECOND ROTORS, AND
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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |