Patent US3146757A successfully refreshed from Google Patents.
US3146757A
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Differential pressure indicator
Assignee: Individual
•
Filing: 1961-05-31
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Granted: 1964-09-01
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Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 Bernard R Heymann
- 👤 Raymond L Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:41
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/143; Y; Y10; Y10S; Y10S116/00; Y10S116/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A DIFFERENTIAL PRESSURE INDICATOR COMPRISING A MOVABLE PISTON MOVABLE BY A PREDETERMINED DIFFERENTIAL PRESSURE ACTING THEREACROSS, TEMPERATURE SENSING MEANS COMPRISING A ROTATABLE GIMBAL, SAID GIMBAL BEING ENGAGED WITH SAID PISTON WHEN THE TEMPERATURE EXCEEDS A PREDETERMINED VALUE AND ROTATABLE BY SAID PISTON WHEN SAID PREDETERMINED DIFFERENTIAL PRESSURE IS EXCEEDED, AND A SIGNAL MEMBER OPERATIVELY CONNECTED TO SAID GIMBAL AND MOVABLE TO A SIGNAL POSITION WHEN SAID GIMBAL ROTATES A PREDETERMINED DISTANCE.
Claim 2
Dependent Claim
71 words
A DIFFERENTIAL PRESSURE INDICATOR COMPRISING A MOVABLE PISTON MOVABLE BY A PREDETERMINED DIFFERENTIAL PRESSURE ACTING THEREACROSS, TEMPERATURE SENSING MEANS COMPRISING A ROTATABLE GIMBAL, SAID GIMBAL BEING ENGAGED WITH SAID PISTON WHEN THE TEMPERATURE EXCEEDS A PREDETERMINED VALUE AND ROTATABLE BY SAID PISTON WHEN SAID PREDETERMINED DIFFERENTIAL PRESSURE IS EXCEEDED, AND A SIGNAL MEMBER OPERATIVELY CONNECTED TO SAID GIMBAL AND MOVABLE TO A SIGNAL POSITION WHEN SAID GIMBAL ROTATES A PREDETERMINED DISTANCE.
References Cited (Backward Citations)
US2979021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |