US3291060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear pumps
Assignee: ZF International UK Ltd
•
Filing: 1966-03-21
•
Granted: 1966-12-13
•
Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 Bottoms Harry Simister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:58
CPC Classifications
F; F04; F04C; F04C11/00; F04C11/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
A GEAR PUMP COMPRISING A HOUSING, A PAIR OF MESHING TOOTHED WHEELS MOUNTED FOR ROTATION IN THE HOUSING, AN INLET PORT IN THE HOUSING AT ONE SIDE OF THE POINT OF INTERENGAGEMENT OF THE TEETH OF THE PAIR OF WHEELS, AND AN OUTLET PORT IN THE HOUSING AT THE OTHER SIDE OF SAID POINT, THE INLET PORT BEING IN A WALL OF THE HOUSING PRESENTED TO THE SIDES OF THE WHEELS, AND HAVING A CROSSSECTIONAL SHAPE WHICH PROVIDES A MAIN PORTION ADJACENT THE SIDES OF THOSE TEETH MOVING OUT OF INTERENGAGEMENT, AND A PAIR OF ARCUATE BRANCHES EXTENDING FROM THE MAIN PORTION BESIDE THE TEETH OF THE TWO WHEELS RESPECTIVELY EACH BRANCH HAVING AN OUTER EDGE WHICH TAPERS TOWARDS THE ROOT CIRCLE OF THE ADJACENT WHEEL, AND THERE BEING AN INLET PASSAGE IN THE BODY COMMUNICATING WITH THE INLET PORT, SAID INLET PASSAGE, AT LEAST IN THE REGION OF THE INLET PORT, EXTENDING IN A DIRECTION WHICH IS INCLINED TO THE AXES OF ROTATION OF THE WHEELS, SAID INCLINATION BEING SUCH THAT LIQUID DELIVERED THROUGH SAID INLET PORT HAS A COMPONENT OF MOVEMENT IN CONTRA-DIRECTION TO THE DIRECTION OF MOVEMENT OF THAT PORTION OF THE PERIPHERY OF A WHEEL ADJACENT TO THE INLET PORT.
Claim 2
Dependent Claim
204 words
A GEAR PUMP COMPRISING A HOUSING, A PAIR OF MESHING TOOTHED WHEELS MOUNTED FOR ROTATION IN THE HOUSING, AN INLET PORT IN THE HOUSING AT ONE SIDE OF THE POINT OF INTERENGAGEMENT OF THE TEETH OF THE PAIR OF WHEELS, AND AN OUTLET PORT IN THE HOUSING AT THE OTHER SIDE OF SAID POINT, THE INLET PORT BEING IN A WALL OF THE HOUSING PRESENTED TO THE SIDES OF THE WHEELS, AND HAVING A CROSSSECTIONAL SHAPE WHICH PROVIDES A MAIN PORTION ADJACENT THE SIDES OF THOSE TEETH MOVING OUT OF INTERENGAGEMENT, AND A PAIR OF ARCUATE BRANCHES EXTENDING FROM THE MAIN PORTION BESIDE THE TEETH OF THE TWO WHEELS RESPECTIVELY EACH BRANCH HAVING AN OUTER EDGE WHICH TAPERS TOWARDS THE ROOT CIRCLE OF THE ADJACENT WHEEL, AND THERE BEING AN INLET PASSAGE IN THE BODY COMMUNICATING WITH THE INLET PORT, SAID INLET PASSAGE, AT LEAST IN THE REGION OF THE INLET PORT, EXTENDING IN A DIRECTION WHICH IS INCLINED TO THE AXES OF ROTATION OF THE WHEELS, SAID INCLINATION BEING SUCH THAT LIQUID DELIVERED THROUGH SAID INLET PORT HAS A COMPONENT OF MOVEMENT IN CONTRA-DIRECTION TO THE DIRECTION OF MOVEMENT OF THAT PORTION OF THE PERIPHERY OF A WHEEL ADJACENT TO THE INLET PORT.
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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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |