US3170409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor pump seal
Assignee: TA ACQUISITION CORP
•
Filing: 1963-04-01
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Granted: 1965-02-23
•
Expires: 1983-04-01
Abstract
No abstract record available.
Inventors
- 👤 Stewart B Mcleod
- 👤 Robert E Shelhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:28
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/102; F04C15/00; F04C15/0003; F04C15/0023; F04C15/0026; F04C15/0057; F04C15/0076
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
IN A ROTOR GEAR PUMP INCLUDING A FLUID RECEPTIVE CHAMBER AND HAVING A PAIR OF RELATIVELY ROTATABLE GEARTOOTHED FLUID PUMPING ROTOR MEMBERS PROVIDED IN CONCENTRIC AND ECCENTRIC RELATION THEREIN, WITH FLUID TRANSFER SPACES PROVIDED THEREBETWEEN INTHE COURSE OF THEIR ROTATION AND OPEN ON ONE AXIAL SIDE OF SAID CHAMBER, SEALING MEANS, COMPRISING; AN AXIALLY MOVEABLE DISC PROVIDED ON THE SIDE OF SAID CHAMBER ON WHICH SAID FLUID TRANSFER SPACES ARE OPEN, AND MEANS MAGNETICALLY ATTRACTING SAID DISC TO SAID ROTORS FOR ROTATION THEREWITH AND THE CLOSING OF THE SPACES FORMED THEREBETWEEN.
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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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |