US3071075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid circulator
Assignee: Watts Regulator Co
•
Filing: 1960-07-25
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Granted: 1963-01-01
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Expires: 1980-07-25
Abstract
No abstract record available.
Inventors
- 👤 Spring Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:05
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/047; F04D29/041; F04D29/0413; F04D29/66; F04D29/669; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A LIQUID CIRCULATOR COMPRISING, IN COMBINATION: A VANED IMPELLER HAVING MEANS ADAPTED TO BE COUPLED TO A ROTATING SHAFT TO AXIALLY RESTRAIN THE IMPELLER ON THE SHAFT; AN ELECTRIC MOTOR OF THE TYPE HAVING OPPOSITE ENDS OF A ROTOR MOUNTING DRIVE SHAFT EXTENDING THEREFROM, ONE END OF THE DRIVE SHAFT BEING CLOSE-COUPLED DIRECTLY TO SAID VANED IMPELLER; MEANS DEFINING A JOURNAL WALL THROUGH WHICH EXTENDS THE OTHER END OF THE DRIVE SHAFT; THRUST BEARING MEANS ON SAID DRIVE SHAFT POSITIONED TO COOPERATE WITH OPPOSITE SIDES OF SAID JOURNAL WALL; AND SINGLE SPRING MEANS COOPERATING WITH SAID THRUST BEARING MEANS FOR PRELOADING SAID DRIVE SHAFT IN A DIRECTION AWAY FROM SAID VANED IMPELLER WITH A FORCE GREATER THAN THE ALGEBRAIC SUM OF AXIAL FORCES ON SAID VANED IMPELLER SO AS TO REDUCE AXIAL SHAFT VIBRATIONS OF THE CLOSE-COUPLED MOTOR DRIVEN IMPELLER AND MINIMIZE THE OPERATING NOISE LEVEL.
Claim 2
Dependent Claim
146 words
A LIQUID CIRCULATOR COMPRISING, IN COMBINATION: A VANED IMPELLER HAVING MEANS ADAPTED TO BE COUPLED TO A ROTATING SHAFT TO AXIALLY RESTRAIN THE IMPELLER ON THE SHAFT; AN ELECTRIC MOTOR OF THE TYPE HAVING OPPOSITE ENDS OF A ROTOR MOUNTING DRIVE SHAFT EXTENDING THEREFROM, ONE END OF THE DRIVE SHAFT BEING CLOSE-COUPLED DIRECTLY TO SAID VANED IMPELLER; MEANS DEFINING A JOURNAL WALL THROUGH WHICH EXTENDS THE OTHER END OF THE DRIVE SHAFT; THRUST BEARING MEANS ON SAID DRIVE SHAFT POSITIONED TO COOPERATE WITH OPPOSITE SIDES OF SAID JOURNAL WALL; AND SINGLE SPRING MEANS COOPERATING WITH SAID THRUST BEARING MEANS FOR PRELOADING SAID DRIVE SHAFT IN A DIRECTION AWAY FROM SAID VANED IMPELLER WITH A FORCE GREATER THAN THE ALGEBRAIC SUM OF AXIAL FORCES ON SAID VANED IMPELLER SO AS TO REDUCE AXIAL SHAFT VIBRATIONS OF THE CLOSE-COUPLED MOTOR DRIVEN IMPELLER AND MINIMIZE THE OPERATING NOISE LEVEL.
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |