US3240894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pressure responsive device
Assignee: Holley Performance Products Inc
•
Filing: 1962-12-31
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Granted: 1966-03-15
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Jr George A Mansfield
- 👤 Ralph P Mccabe
- 👤 Begian Mehrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:31
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A DIFFERENTIAL PRESSURE RESPONSIVE DEVICE, SAID DEVICE COMPRISING A BODY HAVING A FIRST CHAMBER TO WHICH A PRESSURE IS CONTINUOUSLY COMMUNICATED, A SECOND CHAMBER, A COMMON MOVABLE WALL BETWEEN SAID CHAMBERS, MEANS POSITIONED IN SAID SECOND CHAMBER RESISTING THE MOVEMENT OF SAID MOVABLE WALL TOWARD SAID FIRST CHAMBER, MEANS FOR AT TIME DECREASING THE PRESSURE IN SAID FIRST CHAMBER RESULTING IN A PREDETERMINED PRESSURE DIFFERENTIAL ACROSS SAID MOVABLE WALL, A RESTRICTED COMMUNICATION BETWEEN SAID CHAMBERS PREVENTING THE ATTAINMENT OF SAID PREDETERMINED PRESSURE DIFFERENTIAL EXCEPT UPON A RAPID DECREASE IN PRESSURE IN SAID FIRST CHAMBER AND MEANS FOR AT TIMES RAPIDLY DECREASING THE PRESSURE IN SAID FIRST CHAMBER.
Claim 2
Dependent Claim
107 words
A DIFFERENTIAL PRESSURE RESPONSIVE DEVICE, SAID DEVICE COMPRISING A BODY HAVING A FIRST CHAMBER TO WHICH A PRESSURE IS CONTINUOUSLY COMMUNICATED, A SECOND CHAMBER, A COMMON MOVABLE WALL BETWEEN SAID CHAMBERS, MEANS POSITIONED IN SAID SECOND CHAMBER RESISTING THE MOVEMENT OF SAID MOVABLE WALL TOWARD SAID FIRST CHAMBER, MEANS FOR AT TIME DECREASING THE PRESSURE IN SAID FIRST CHAMBER RESULTING IN A PREDETERMINED PRESSURE DIFFERENTIAL ACROSS SAID MOVABLE WALL, A RESTRICTED COMMUNICATION BETWEEN SAID CHAMBERS PREVENTING THE ATTAINMENT OF SAID PREDETERMINED PRESSURE DIFFERENTIAL EXCEPT UPON A RAPID DECREASE IN PRESSURE IN SAID FIRST CHAMBER AND MEANS FOR AT TIMES RAPIDLY DECREASING THE PRESSURE IN SAID FIRST CHAMBER.
References Cited (Backward Citations)
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Cited
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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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |