US3273495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil expeller
Assignee: Individual
•
Filing: 1964-03-10
•
Granted: 1966-09-20
•
Expires: 1984-03-10
Abstract
No abstract record available.
Inventors
- 👤 Ozawa Masakatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:02
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
AN OIL EXPELLER COMPRISING A CASING HAVING A CYLINDRICAL PASSAGEWAY AND CONDUIT MEANS CONNECTING SAID PASSAGEWAY WITH A COLLECTOR, AN INLET IN ONE END OF THE CASING COMMUNICATING WITH SAID PASSAGEWAY FOR ADMITTING THE MATERIAL TO BE PRESSED INTO THE PASSAGEWAY, AN OUTLET AT THE OTHER END OF THE CASING FOR REMOVING THE PRESSED MATERIAL, AND A SCREW ROTATABLY MOUNTED IN SAID PASSAGEWAY, SAID SCREW COMPRISING A FIRST CORE SECTION OF UNIFORM DIAMETER AND A SECOND CORE SECTION OF NONUNIFORM DIAMETER ADJACENT THERETO, A THREAD INTEGRAL WITH THE CORE HAVING A UNIFORM DIAMETER EQUAL TO THE DIAMETER OF THE PASSAGEWAY AND HAVING A FIRST ZONE OF PREDETERMINED PITCH ADJACENT THE INLET, A SECOND ZONE OF A GREATER PITCH THAN SAID PREDETERMINED PITCH ADJACENT THE FIRST ZONE, AND A THIRD ZONE OF A PITCH LESS THAN THE PITCH OF THE SECOND ZONE, SAID THIRD ZONE BEING ADJACENT SAID SECOND ZONE AND ON THE CORE SECTION OF NON-UNIFORM DIAMETER.
Claim 2
Dependent Claim
157 words
AN OIL EXPELLER COMPRISING A CASING HAVING A CYLINDRICAL PASSAGEWAY AND CONDUIT MEANS CONNECTING SAID PASSAGEWAY WITH A COLLECTOR, AN INLET IN ONE END OF THE CASING COMMUNICATING WITH SAID PASSAGEWAY FOR ADMITTING THE MATERIAL TO BE PRESSED INTO THE PASSAGEWAY, AN OUTLET AT THE OTHER END OF THE CASING FOR REMOVING THE PRESSED MATERIAL, AND A SCREW ROTATABLY MOUNTED IN SAID PASSAGEWAY, SAID SCREW COMPRISING A FIRST CORE SECTION OF UNIFORM DIAMETER AND A SECOND CORE SECTION OF NONUNIFORM DIAMETER ADJACENT THERETO, A THREAD INTEGRAL WITH THE CORE HAVING A UNIFORM DIAMETER EQUAL TO THE DIAMETER OF THE PASSAGEWAY AND HAVING A FIRST ZONE OF PREDETERMINED PITCH ADJACENT THE INLET, A SECOND ZONE OF A GREATER PITCH THAN SAID PREDETERMINED PITCH ADJACENT THE FIRST ZONE, AND A THIRD ZONE OF A PITCH LESS THAN THE PITCH OF THE SECOND ZONE, SAID THIRD ZONE BEING ADJACENT SAID SECOND ZONE AND ON THE CORE SECTION OF NON-UNIFORM DIAMETER.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |