Patent US3374680A successfully refreshed from Google Patents.
US3374680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft speed limiting device
Assignee: Carrier Corp
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Filing: 1965-09-13
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Granted: 1968-03-26
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Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 Carl H Geary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:10
CPC Classifications
F; F01; F01D; F01D21/00; F01D21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A TRIP MECHANISM FOR SHAFT SPEED GOVERNING APPARATUS COMPRISING A FIRST BELLEVILLE CONTROL SPRING ENCIRCLING THE SHAFT, COLLARS MOUNTED ON SAID SHAFT AT OPPOSITE SIDES OF SAID SPRING, THE FIRST OF SAID COLLARS NORMALLY ENGAGING THE INNER AREA OF THE CONCAVE SIDE OF THE SPRING, THE SECOND OF SAID COLLARS ON THE OPPOSITE SIDE OF SAID SPRING NORMALLY ENGAGING THE CONVEX SIDE OF SAID SPRING, SAID FIRST BELLEVILLE SPRING HAVING WEIGHTS MOUNTED ON THE CONCAVE SIDE OF THE SPRING. THE SAID SPRING AND WEIGHTS BEING SO PROPORTIONED AND RELATED THAT THE SPRING WILL SNAP OVER WHEN THE SHAFT STARTS TO EXCEED A PREDETERMINED MAXIMUM SPEED AND WILL SNAP BACK WHEN THE SPEED IS REDUCED, A SECOND BELLEVILLE SPRING POSITIONED BETWEEN THE SAID SECOND COLLAR AND A THIRD COLLAR, SAID SECOND COLLAR ENGAGING THE INNER AREA OF THE CONCAVE SIDE OF SAID SECOND SPRING, SAID SECOND SPRING BEING SO PROPORTIONED AND RELATED TO SAID FIRST SPRING THAT IT WILL STRESS THE FIRST SPRING TOWARD THE LOW SPEED POSITION WHEN SAID FIRST SPRING IS IN THE HIGHSPEED, SNAPPED-OVER POSITION.
Claim 2
Dependent Claim
177 words
A TRIP MECHANISM FOR SHAFT SPEED GOVERNING APPARATUS COMPRISING A FIRST BELLEVILLE CONTROL SPRING ENCIRCLING THE SHAFT, COLLARS MOUNTED ON SAID SHAFT AT OPPOSITE SIDES OF SAID SPRING, THE FIRST OF SAID COLLARS NORMALLY ENGAGING THE INNER AREA OF THE CONCAVE SIDE OF THE SPRING, THE SECOND OF SAID COLLARS ON THE OPPOSITE SIDE OF SAID SPRING NORMALLY ENGAGING THE CONVEX SIDE OF SAID SPRING, SAID FIRST BELLEVILLE SPRING HAVING WEIGHTS MOUNTED ON THE CONCAVE SIDE OF THE SPRING. THE SAID SPRING AND WEIGHTS BEING SO PROPORTIONED AND RELATED THAT THE SPRING WILL SNAP OVER WHEN THE SHAFT STARTS TO EXCEED A PREDETERMINED MAXIMUM SPEED AND WILL SNAP BACK WHEN THE SPEED IS REDUCED, A SECOND BELLEVILLE SPRING POSITIONED BETWEEN THE SAID SECOND COLLAR AND A THIRD COLLAR, SAID SECOND COLLAR ENGAGING THE INNER AREA OF THE CONCAVE SIDE OF SAID SECOND SPRING, SAID SECOND SPRING BEING SO PROPORTIONED AND RELATED TO SAID FIRST SPRING THAT IT WILL STRESS THE FIRST SPRING TOWARD THE LOW SPEED POSITION WHEN SAID FIRST SPRING IS IN THE HIGHSPEED, SNAPPED-OVER POSITION.
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) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |