US3653642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburettors
Assignee: Zenith Carburetter Co Ltd
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Filing: 1969-10-16
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Granted: 1972-04-04
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Expires: 1989-10-16
Abstract
Abstract The invention provides an air valve carburettor wherein the contoured needle is mounted for axial movement relative to the suction operated member and temperature sensitive control means are provided and associated between said contoured needle and said suction operated member whereby the cross sectional area of the jet orifice is determined by the temperature sensed by the temperature sensitive control means which temperature will be influenced inter alia by the temperature of the incoming fuel, the temperature of the air passing beneath the air valve and the temperature of the engine.
Inventors
- 👤 Geoffrey Lloyd Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:51
CPC Classifications
F; F02; F02M; F02M1/00; F02M1/08; F02M1/10; F02M7/00; F02M7/12; F02M7/14; F02M7/16; F02M7/17; F02D; F02D2200/00; F02D2200/02; F02D2200/06; F02D2200/0606
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
An air valve carburettor having an air passage, a choke in said air passage, a piston controlling the effective cross sectional area of said choke, said piston moving transversely of said air passage, a fuel metering orifice opening into said air passage, a contoured needle carried by said piston and movable axially in said orifice, means coupling said needle to said piston, a temperature sensitive control means connected between said needle and said piston and situated in the viciNity of the fuel discharge in said air passage, said needle being mounted in a holder and said holder being slidably mounted on said piston, said holder being moved relative to said piston by said temperature sensitive control means.
Claim 2
Dependent Claim
117 words
An air valve carburettor having an air passage, a choke in said air passage, a piston controlling the effective cross sectional area of said choke, said piston moving transversely of said air passage, a fuel metering orifice opening into said air passage, a contoured needle carried by said piston and movable axially in said orifice, means coupling said needle to said piston, a temperature sensitive control means connected between said needle and said piston and situated in the viciNity of the fuel discharge in said air passage, said needle being mounted in a holder and said holder being slidably mounted on said piston, said holder being moved relative to said piston by said temperature sensitive control means.
Claim 3
Dependent Claim
19 words
An air carburettor according to claim 1 wherein yieldable support means is provided between said needle and said holder.
Claim 4
Dependent Claim
26 words
An air valve carburettor according to claim 1 wherein said temperature sensitive control means is a bimetallic strip mounted on said piston and carrying said holder.
Claim 5
Dependent Claim
24 words
An air valve carburettor according to claim 1, further including means for biassing said contoured needle towards the wall of said fuel metering orifice.
References Cited (Backward Citations)
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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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |