Patent US3848857A successfully refreshed from Google Patents.
US3848857A
Expired / Lapsed
US
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Carburettors provided with a starting device with an eccentric flap valve
Assignee: Societe Industrielle de Brevets et dEtudes SIBE
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Filing: 1973-06-26
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Granted: 1974-11-19
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Expires: 1993-06-26
Abstract
Abstract The eccentric flap valve is situated in an air intake of the carburettor upstream of the intake system for the primary air/fuel mixture, and actuated by the air flow against the effect of a first thermostatic member which tends to close it when the temperature of an element of the engine is below a given limit. A ''''fast idling'''' cam cooperates with a second thermostatic member, to partly open the usual throttle member of the carburettor when the flap valve is at least partially closed. Pneumatic means sensitive to the pressure which exists in the intake pipe downstream of the throttle member control the opening of the valve when the pressure diminishes. Stop means with several positions, limit, in variable manner as a function of the position that they occupy, the movement of the pneumatic means. Means sensitive to the ambient temperature control the position occupied by the stop means.
Inventors
- 👤 A Mennesson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:51
CPC Classifications
F; F02; F02M; F02M1/00; F02M1/08; F02M1/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
195 words
Carburettor comprising a starting device with an eccentric flap valve situated in an air intake of the carburettor upstream of an intake system for the primary air/fuel mixture, said valve being actuated by the air flow inspired by the carburettor against the effect of a first thermostatic member which tends to close said flap valve when the temperature of an element of the engine is below a given limit, said carburettor comprising in addition a cam called a ''''fast idling'''' cam adapted to cooperate with a second thermostatic member, said cam being intended to partly open the usual throttle member of the carburettor when the flap valve is at least partially closed, pneumatic means sensitive to the pressure in the intake pipe downstream of the throttle member being provided to control, by their movement, the opening of the valve when said pressure diminishes, said carburettor also comprising stop means with several positions, adapted to limit, in variable manner as a function of said position that they occupy, the movement of the pneumatic means, and said second thermostatic member constituting means sensitive to the ambient temperature arranged to control the position occupied by the stop means.
Claim 2
Dependent Claim
195 words
Carburettor comprising a starting device with an eccentric flap valve situated in an air intake of the carburettor upstream of an intake system for the primary air/fuel mixture, said valve being actuated by the air flow inspired by the carburettor against the effect of a first thermostatic member which tends to close said flap valve when the temperature of an element of the engine is below a given limit, said carburettor comprising in addition a cam called a ''''fast idling'''' cam adapted to cooperate with a second thermostatic member, said cam being intended to partly open the usual throttle member of the carburettor when the flap valve is at least partially closed, pneumatic means sensitive to the pressure in the intake pipe downstream of the throttle member being provided to control, by their movement, the opening of the valve when said pressure diminishes, said carburettor also comprising stop means with several positions, adapted to limit, in variable manner as a function of said position that they occupy, the movement of the pneumatic means, and said second thermostatic member constituting means sensitive to the ambient temperature arranged to control the position occupied by the stop means.
Claim 3
Dependent Claim
32 words
Carburettor according to claim 1, wherein said stop means are constituted by a stepped rotary cam, the various angular positions taken by the cam being controlled by the ambient temperature sensitive means.
Claim 4
Dependent Claim
58 words
Carburettor according to claim 2, wherein the stepped cam is constituted by a peripheral part of the ''''fast idling'''' cam, different from the zone serving for the adjustment of the opening of the usual throttle member, the second thermostatic member having one end anchored at a fixed point and the other end anchored to the ''''fast idling'''' cam.
Claim 5
Dependent Claim
28 words
Carburettor according to claim 3, wherein the end of the second thermostatic member, which is anchored to the cam, is wound about a pin fast to the cam.
Claim 6
Dependent Claim
52 words
Carburettor according to claim 1, wherein th pneumatic means are constituted by a diaphragm capsule controlling the movements of a stem, and the stem comprises, at its end distant from the diaphragm, a curved arm bearing a screw constituting an adjustable stop, adapted to cooperate with the stop means in several positions.
Claim 7
Dependent Claim
48 words
Carburettor according to claim 5, wherein the stem comprises, in its middle part, a notch bounded by an edge, adapted to cooperate with the end of a lever controlling the opening of the flap valve, this lever being connected, at its other end, to the first thermostatic member.
Claim 8
Dependent Claim
91 words
Carburettor according to claim 6, wherein the lever connected to the first thermostatic member is keyed on the end of an axle rotating freely in a bush on which is mounted free in rotation the ''''fast idling'''' cam, the other end of the axle emerges from the bush and bears an arm connected to a linkage controlling the opening of the valve, the second thermostatic member being mounted about the end of the bush neighbouring said arm and the fixed end of said second thermostatic member being anchored in the bush.
Claim 9
Dependent Claim
69 words
Carburettor according to claim 7, wherein a helical spring is mounted around the axle between the arm and the neighbouring end of the bush, said spring being anchored, at one end in said arm and at its other end, comprising a rectilinear part arranged to cooperate, for a sufficient rotation of the arm, with a pin fast to the cam so that the latter is rotated by the arm.
Claim 10
Dependent Claim
52 words
Carburettor according to claim 2, wherein the pneumatic means are constituted by a diaphragm capSule controlling the movements of a stem, and the stem comprises, at its end distant from the diaphragm a curved arm bearing a screw constituting an adjustable stop, adapted to cooperate with the stop means in several positions.
References Cited (Backward Citations)
GB799345A
Cited
US3272486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |