US3198120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple positive displacement pump
Assignee: Waukesha Foundry Co Inc
•
Filing: 1962-10-29
•
Granted: 1965-08-03
•
Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Clarence W Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:49
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/02; F04C11/00; F04C11/001; F04C2/00; F04C2/08; F04C2/12; F04C2/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A MULTIPLE POSITIVE DISPLACEMENT PUMP COMPRISING PRIMARY AND SECONDARY PUMP CASING SECTIONS AND AN INTERMEDIATE TRANSFER SECTION, EACH OF THE PUMP CASING SECTIONS HAVING A TRANSVERSE WALL AND PUMPING RECESSES, A PLURALITY OF SHAFTS EXTENDING THROUGH THE SEVERAL SECTIONS AND THE RECESSES AFORESAID, MATERIAL PUMPING MEANS COMPRISING COMPLEMENTARY POSITIVE DISPLACEMENT PUMP ROTORS ON THE SHAFTS IN THE RESPECTIVE RECESSES, AND MEANS FOR DETACHABLY CONNECTING THE SEVERAL SECTIONS, THE PRIMARY PUMP CASING SECTIONS HAVING AN INLET AND THE SECONDARY PUMP CASING SECTION HAVING AN OUTLET, SAID TRANSFER SECTION AND SAID TRANSVERSE WALL OF ONE OF SAID PUMP CASING SECTIONS HAVING COMPLEMENTARY MEANS PROVIDING A PASSAGEWAY FOR DELIVERY OF MATERIAL PUMPED FROM THE PRIMARY PUMP CASING SECTION TO THE SECONDARY PUMP CASING SECTION AND SAID COMPLEMENTARY MEANS HAVING SURFACES COMPLETELY EXPOSED FOR CLEANING UPON THE SEPARATION OF SAID SECTIONS.
Claim 2
Dependent Claim
137 words
A MULTIPLE POSITIVE DISPLACEMENT PUMP COMPRISING PRIMARY AND SECONDARY PUMP CASING SECTIONS AND AN INTERMEDIATE TRANSFER SECTION, EACH OF THE PUMP CASING SECTIONS HAVING A TRANSVERSE WALL AND PUMPING RECESSES, A PLURALITY OF SHAFTS EXTENDING THROUGH THE SEVERAL SECTIONS AND THE RECESSES AFORESAID, MATERIAL PUMPING MEANS COMPRISING COMPLEMENTARY POSITIVE DISPLACEMENT PUMP ROTORS ON THE SHAFTS IN THE RESPECTIVE RECESSES, AND MEANS FOR DETACHABLY CONNECTING THE SEVERAL SECTIONS, THE PRIMARY PUMP CASING SECTIONS HAVING AN INLET AND THE SECONDARY PUMP CASING SECTION HAVING AN OUTLET, SAID TRANSFER SECTION AND SAID TRANSVERSE WALL OF ONE OF SAID PUMP CASING SECTIONS HAVING COMPLEMENTARY MEANS PROVIDING A PASSAGEWAY FOR DELIVERY OF MATERIAL PUMPED FROM THE PRIMARY PUMP CASING SECTION TO THE SECONDARY PUMP CASING SECTION AND SAID COMPLEMENTARY MEANS HAVING SURFACES COMPLETELY EXPOSED FOR CLEANING UPON THE SEPARATION OF SAID SECTIONS.
References Cited (Backward Citations)
US1245691A
Cited
US1477850A
Cited
US1689673A
Cited
US2324116A
Cited
US2381695A
Cited
US2533047A
Cited
US2653543A
Cited
AT177505B
Cited
AT177867B
Cited
US2796240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |