US3249099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage carburetor
Assignee: Holley Performance Products Inc
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Filing: 1962-10-01
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Granted: 1966-05-03
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Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Richard M Saxby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:45
CPC Classifications
F; F02; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4304; F02M2700/4311
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN AN INTERNAL COMBUSTION ENGINE, A PRIMARY INTAKE PASSAGE HAVING A THROTTLE VALVE CONTROLLING THE FLOW OF MOTIVE FLUID THERETHROUGH, A SECONDARY INTAKE PASSAGE HAVING A THROTTLE VALVE THEREIN, RESILIENT MEANS FOR NORMALLY HOLDING SAID SECONDARY THROTTLE VALVE CLOSED, A TWO-WAY SUCTION DEVICE ACTUATED ON ONE SIDE BY VACUUM RESULTING FROM FLOW OF AIR THROUGH AT LEAST ONE OF SAID INTAKE PASSAGES FOR OPENING SAID SECONDARY THROTTLE VALVE AGAINST SAID RESILIENT MEANS, AND CONDUIT MEANS COMMUNICATING BETWEEN THE OTHER SIDE OF SAID TWO-WAY SUCTION DEVICE AND SAID PRIMARY INTAKE PASSAGE POSTERIOR TO SAID PRIMARY THROTTLE VALVE, SAID CONDUIT INCLUDING A VALVE ACTUATED IN RESPONSE TO THE VACUUM IN SAID PRIMARY INTAKE PASSAGE FOR AT TIMES INTRODUCING ENGINE MANIFOLD VACUUM TO SAID SUCTION DEVICE.
Claim 2
Dependent Claim
123 words
IN AN INTERNAL COMBUSTION ENGINE, A PRIMARY INTAKE PASSAGE HAVING A THROTTLE VALVE CONTROLLING THE FLOW OF MOTIVE FLUID THERETHROUGH, A SECONDARY INTAKE PASSAGE HAVING A THROTTLE VALVE THEREIN, RESILIENT MEANS FOR NORMALLY HOLDING SAID SECONDARY THROTTLE VALVE CLOSED, A TWO-WAY SUCTION DEVICE ACTUATED ON ONE SIDE BY VACUUM RESULTING FROM FLOW OF AIR THROUGH AT LEAST ONE OF SAID INTAKE PASSAGES FOR OPENING SAID SECONDARY THROTTLE VALVE AGAINST SAID RESILIENT MEANS, AND CONDUIT MEANS COMMUNICATING BETWEEN THE OTHER SIDE OF SAID TWO-WAY SUCTION DEVICE AND SAID PRIMARY INTAKE PASSAGE POSTERIOR TO SAID PRIMARY THROTTLE VALVE, SAID CONDUIT INCLUDING A VALVE ACTUATED IN RESPONSE TO THE VACUUM IN SAID PRIMARY INTAKE PASSAGE FOR AT TIMES INTRODUCING ENGINE MANIFOLD VACUUM TO SAID SUCTION DEVICE.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |