Patent US917109A successfully refreshed from Google Patents.
Patent US3380349A successfully refreshed from Google Patents.
US3380349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum motor
Assignee: F AND E Manufacturing CO
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Filing: 1966-08-31
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Granted: 1968-04-30
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Expires: 1986-08-31
Abstract
No abstract record available.
Inventors
- 👤 George A James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:19
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B11/12; F15B11/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
IN A VACUUM MOTOR, THE COMBINATION COMPRISING A HOUSING, A MEMBER WITHIN SAID HOUSING DIVIDING SAID HOUSING INTO TWO CHAMBERS AND MOVABLE THEREIN TO CHANGE THE SIZE OF SAID TWO CHAMBERS, A STEM FIXED TO SAID MEMBER AND PROJECTING THROUGH ONE SAID CHAMBER AND AN OPENING IN SAID HOUSING TO THE EXTERIOR, SAID STEM HAVING A TUBULAR CLOSED END OPENING THEREIN COMMUNICATING WITH THE OTHER SAID CHAMBER, A TUBE FIXED TO SAID HOUSING AND EXTENDING THROUGH THE OTHER SAID CHAMBER AND INTO SAID OPENING IN SAID STEM, A FIRST INLET THROUGH SAID HOUSING COMMUNICATING WITH THE INTERIOR OF SAID TUBE, A SECOND INLET THROUGH SAID HOUSING COMMUNICATING DIRECTLY WITH SAID OTHER CHAMBER, INTERENGAGING MEANS BETWEEN SAID TUBE AND SAID STEM OPERABLE TO PROVIDE A SEAL BETWEEN SAID TUBE AND SAID STEM WHEN SAID STEM IS MOVED INWARDLY OF SAID HOUSING, WHEREBY WHEN VACUUM IS APPLIED TO SAID FIRST INLET COMMUNICATING WITH THE INTERIOR OF SAID TUBE, VACUUM IS APPLIED TO SAID OTHER CHAMBER AND SAID STEM IS CAUSED TO BE MOVED INWARDLY OF SAID HOUSING UNTIL SAID INTERENGAGING MEANS PRODUCES A SEAL BETWEEN SAID TUBE AND SAID STEM AND THEREAFTER WHEN VACUUM IS SUPPLIED TO SAID SECOND INLET, VACUUM IS APPLIED DIRECTLY TO SAID OTHER CHAMBER AND SAID MOVABLE MEMBER IS MOVED TO CAUSE SAID STEM TO MOVE FURTHER WITHIN SAID HOUSING.
Claim 2
Dependent Claim
222 words
IN A VACUUM MOTOR, THE COMBINATION COMPRISING A HOUSING, A MEMBER WITHIN SAID HOUSING DIVIDING SAID HOUSING INTO TWO CHAMBERS AND MOVABLE THEREIN TO CHANGE THE SIZE OF SAID TWO CHAMBERS, A STEM FIXED TO SAID MEMBER AND PROJECTING THROUGH ONE SAID CHAMBER AND AN OPENING IN SAID HOUSING TO THE EXTERIOR, SAID STEM HAVING A TUBULAR CLOSED END OPENING THEREIN COMMUNICATING WITH THE OTHER SAID CHAMBER, A TUBE FIXED TO SAID HOUSING AND EXTENDING THROUGH THE OTHER SAID CHAMBER AND INTO SAID OPENING IN SAID STEM, A FIRST INLET THROUGH SAID HOUSING COMMUNICATING WITH THE INTERIOR OF SAID TUBE, A SECOND INLET THROUGH SAID HOUSING COMMUNICATING DIRECTLY WITH SAID OTHER CHAMBER, INTERENGAGING MEANS BETWEEN SAID TUBE AND SAID STEM OPERABLE TO PROVIDE A SEAL BETWEEN SAID TUBE AND SAID STEM WHEN SAID STEM IS MOVED INWARDLY OF SAID HOUSING, WHEREBY WHEN VACUUM IS APPLIED TO SAID FIRST INLET COMMUNICATING WITH THE INTERIOR OF SAID TUBE, VACUUM IS APPLIED TO SAID OTHER CHAMBER AND SAID STEM IS CAUSED TO BE MOVED INWARDLY OF SAID HOUSING UNTIL SAID INTERENGAGING MEANS PRODUCES A SEAL BETWEEN SAID TUBE AND SAID STEM AND THEREAFTER WHEN VACUUM IS SUPPLIED TO SAID SECOND INLET, VACUUM IS APPLIED DIRECTLY TO SAID OTHER CHAMBER AND SAID MOVABLE MEMBER IS MOVED TO CAUSE SAID STEM TO MOVE FURTHER WITHIN SAID HOUSING.
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) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |