US3738336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and arrangement for controlling fuel delivery in a charge forming apparatus
Assignee: TILLOTSON Ltd (TILLOSTSON") A CORP OF IRELAND
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Filing: 1971-04-19
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Granted: 1973-06-12
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Expires: 1991-04-19
Abstract
Abstract The disclosure embraces a method of and an arrangement for reducing or substantially restricting delivery of fuel into the induction system or fuel and air mixing passage of a carburetor or charge forming apparatus upon rebound or reversal of direction of flow of the mixture momentarily occurring at the periods of the closing of the mixture inlet port or ports of an internal combustion engine by reducing mixture rebound velocity and increasing the pressure adjacent the zone of delivery of fuel into the mixing passage thereby preventing appreciable enrichment of the fuel and air mixture during said rebound periods.
Inventors
- 👤 N Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:55
CPC Classifications
F; F02; F02M; F02M17/00; F02M17/02; F02M17/04; F02M19/00; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; Y; Y10; Y10S; Y10S261/00; Y10S261/39; Y10S261/68
Claims Analysis
Total Claims: 58
Claim 1
Independent Claim
125 words
A system for substantially preventing delivery of an overrich fuel and air mixture to an internal combustion engine during engine operation including delivering fuel from an orifice under the influence of engine aspiration into an air stream flowing through an induction passage providing a combustible fuel and air mixture at the region of a mixture inlet port of the engine, interrupting normal mixture flow by the closing of the inlet port to the engine thereby effecting a reversal in direction of mixture flow in the induction passage, and reducing the velocity of the reversely flowing mixture at the region of delivery of fuel into the passage during periods of closing of the inlet port to reduce delivery of fuel into the passage at such periods.
Claim 2
Independent Claim
125 words
A system for substantially preventing delivery of an overrich fuel and air mixture to an internal combustion engine during engine operation including delivering fuel from an orifice under the influence of engine aspiration into an air stream flowing through an induction passage providing a combustible fuel and air mixture at the region of a mixture inlet port of the engine, interrupting normal mixture flow by the closing of the inlet port to the engine thereby effecting a reversal in direction of mixture flow in the induction passage, and reducing the velocity of the reversely flowing mixture at the region of delivery of fuel into the passage during periods of closing of the inlet port to reduce delivery of fuel into the passage at such periods.
Claim 3
Independent Claim
125 words
A system for substantially preventing delivery of an overrich fuel and air mixture to an internal combustion engine during engine operation including delivering fuel from an orifice under the influence of engine aspiration into an air stream flowing through an induction passage providing a combustible fuel and air mixture at the region of a mixture inlet port of the engine, interrupting normal mixture flow by the closing of the inlet port to the engine thereby effecting a reversal in direction of mixture flow in the induction passage, and impeding the flow of the reversely flowing mixture at the region of delivery of fuel into the passage during periods of closing of the inlet port to retard delivery of fuel into the passage at such periods.
Claim 4
Independent Claim
125 words
A system for substantially preventing delivery of an overrich fuel and air mixture to an internal combustion engine during engine operation including delivering fuel from an orifice under the influence of engine aspiration into an air stream flowing through an induction passage providing a combustible fuel and air mixture at the region of a mixture inlet port of the engine, interrupting normal mixture flow by the closing of the inlet port to the engine thereby effecting a reversal in direction of mixture flow in the induction passage, and impeding the flow of the reversely flowing mixture at the region of delivery of fuel into the passage during periods of closing of the inlet port to retard delivery of fuel into the passage at such periods.
Claim 5
Independent Claim
113 words
The method of controlling the ratio of fuel to air in a combustible mixture supplied through a mixing passage to the engine through an inlet port wherein fuel is aspirated from an orifice into the air stream by the velocity of the air stream, abruptly impeding flow of the mixture by the closing of the inlet port whereby the mixture is caused to flow in a reverse direction through the mixing passage, and reducing flow of the combustible mixture in the reverse direction adjacent the region of delivery of fuel into the mixing passage to reduce apsiration of fuel from the orifice during periods of reverse flow of mixture in the mixing passage.
Claim 6
Independent Claim
113 words
The method of controlling the ratio of fuel to air in a combustible mixture supplied through a mixing passage to the engine through an inlet port wherein fuel is aspirated from an orifice into the air stream by the velocity of the air stream, abruptly impeding flow of the mixture by the closing of the inlet port whereby the mixture is caused to flow in a reverse direction through the mixing passage, and reducing flow of the combustible mixture in the reverse direction adjacent the region of delivery of fuel into the mixing passage to reduce apsiration of fuel from the orifice during periods of reverse flow of mixture in the mixing passage.
Claim 7
Independent Claim
119 words
A method of substantially preventing delivery of an overrich fuel and air mixture to an internal combustion engine during engine operation including delivering fuel from an orifice under the influence of engine aspiration into an air stream flowing through an induction passage providing a combustible fuel and air mixture at the region of a mixture inlet port of the engine, impeding normal mixture flow by the closing of the inlet port to the engine thereby effecting a reversal in direction of mixture flow in the induction passage, and increasing the pressure at the region of fuel delivery into the passage during periods of closing of the inlet port to reduce delivery of fuel into the passage at such periods.
Claim 8
Independent Claim
119 words
A method of substantially preventing delivery of an overrich fuel and air mixture to an internal combustion engine during engine operation including delivering fuel from an orifice under the influence of engine aspiration into an air stream flowing through an induction passage providing a combustible fuel and air mixture at the region of a mixture inlet port of the engine, impeding normal mixture flow by the closing of the inlet port to the engine thereby effecting a reversal in direction of mixture flow in the induction passage, and increasing the pressure at the region of fuel delivery into the passage during periods of closing of the inlet port to reduce delivery of fuel into the passage at such periods.
Claim 9
Dependent Claim
23 words
The method according to claim 4 including varying the amplitude of increase in pressure to regulate the delivery of fuel at such periods.
Claim 10
Independent Claim
134 words
A method of substantially preventing delivery of an overrich fuel and air mixture to an internal combustion engine during engine operation including delivering fuel from an orifice under the influence of engine aspiration into an air stream flowing through a fuel and air mixing passage providing a combustible fuel and air mixture at the region of a mixture inlet port of the engine, impeding normal mixture flow upon closing of the inlet port effecting a reversal in direction of mixture flow in the mixing passage, isolating a portion of the reversely flowing mixture at a control chamber adjacent the delivery of fuel into the passage, and reducing the velocity of the reversely flowing mixture isolated at the chamber to reduce delivery of fuel into the passage during periods of closing of the inlet port.
Claim 11
Independent Claim
134 words
A method of substantially preventing delivery of an overrich fuel and air mixture to an internal combustion engine during engine operation including delivering fuel from an orifice under the influence of engine aspiration into an air stream flowing through a fuel and air mixing passage providing a combustible fuel and air mixture at the region of a mixture inlet port of the engine, impeding normal mixture flow upon closing of the inlet port effecting a reversal in direction of mixture flow in the mixing passage, isolating a portion of the reversely flowing mixture at a control chamber adjacent the delivery of fuel into the passage, and reducing the velocity of the reversely flowing mixture isolated at the chamber to reduce delivery of fuel into the passage during periods of closing of the inlet port.
Claim 12
Dependent Claim
30 words
The method according to claim 6 including venting the control chamber to regulate delivery of fuel into the passage during periods of closing of the inlet port of the engine.
Claim 13
Independent Claim
137 words
A system for substantially preventing delivery of an overrich fuel and air mixture to a two cycle engine of the three port type wherein the piston of the engine controls delivery of combustible fuel and air mixture from an inlet port into the engine crankcase including delivering fuel from a fuel chamber by engine aspiration into a passage in communication with the inlet port and wherein during closed periods of the inlet port the mixture in the passage is caused to flow in a reverse direction in the passage, retarding the velocity of a portion of the reversely flowing mixture by a control chamber in the passage, and reducing delivery of fuel into the passage at the region of the control chamber during periods of closing of the mixture inlet port by the piston of the engine.
Claim 14
Independent Claim
137 words
A system for substantially preventing delivery of an overrich fuel and air mixture to a two cycle engine of the three port type wherein the piston of the engine controls delivery of combustible fuel and air mixture from an inlet port into the engine crankcase including delivering fuel from a fuel chamber by engine aspiration into a passage in communication with the inlet port and wherein during closed periods of the inlet port the mixture in the passage is caused to flow in a reverse direction in the passage, retarding the velocity of a portion of the reversely flowing mixture by a control chamber in the passage, and reducing delivery of fuel into the passage at the region of the control chamber during periods of closing of the mixture inlet port by the piston of the engine.
Claim 15
Dependent Claim
26 words
A system according to claim 8 including venting the control chamber to regulate the reduction in velocity of the reversely flowing mixture at the control chamber.
Claim 16
Independent Claim
157 words
A system for substantially preventing delivery of an overrich fuel and air mixture to a two cycle engine of the three port type wherein the piston of the engine controls delivery of combustible fuel and air mixture from an inlet port into the engine crankcase including delivering fuel from a fuel chamber by engine aspiration into a passage in communication with the inlet port and during closed periods of the inlet port the mixture is caused to flow in a reverse direction in the passage, restricting flow of a portion of the reversely flowing mixture by a barrier adjacent the region of delivery of fuel into the passage to reduce delivery of fuel into the passage during the periods that the inlet port is closed, and venting the barrier to control the extent of reduction in delivery of fuel into the passage during periods of closing of the mixture inlet port by the piston of the engine.
Claim 17
Independent Claim
157 words
A system for substantially preventing delivery of an overrich fuel and air mixture to a two cycle engine of the three port type wherein the piston of the engine controls delivery of combustible fuel and air mixture from an inlet port into the engine crankcase including delivering fuel from a fuel chamber by engine aspiration into a passage in communication with the inlet port and during closed periods of the inlet port the mixture is caused to flow in a reverse direction in the passage, restricting flow of a portion of the reversely flowing mixture by a barrier adjacent the region of delivery of fuel into the passage to reduce delivery of fuel into the passage during the periods that the inlet port is closed, and venting the barrier to control the extent of reduction in delivery of fuel into the passage during periods of closing of the mixture inlet port by the piston of the engine.
Claim 18
Dependent Claim
133 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, an orifice opening into the mixing passage for delivering fuel under the influence of engine aspiration from the fuel chamber into the mixing passage, a throttle valve for controlling flow of fuel and air mixture to the engine having a mixture inlet port which is intermittently closed and opened during engine operation, and means at the region of delivery of fuel into the mixing passage effective during the periods of closing of the mixture inlet port to reduce delivery of fuel into the mixing passage.
Claim 19
Dependent Claim
133 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, an orifice opening into the mixing passage for delivering fuel under the influence of engine aspiration from the fuel chamber into the mixing passage, a throttle valve for controlling flow of fuel and air mixture to the engine having a mixture inlet port which is intermittently closed and opened during engine operation, and means at the region of delivery of fuel into the mixing passage effective during the periods of closing of the mixture inlet port to reduce delivery of fuel into the mixing passage.
Claim 20
Dependent Claim
154 words
Charge forming apparatus including, in combination, a body construction provided with an air and fuel mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, an orifice opening into the mixing passage for delivering fuel under the influence of engine aspiration from the fuel chamber into the mixing passage, a throttle valve for controlling flow of fuel and air mixture to an internal combustion engine having a mixture inlet port which is intermittently closed during engine operation, and means disposed in the mixing passage for reducing the velocity of a portion of the mixture flowing in a revErse direction during the periods of closing of the mixture inlet port to reduce aspiration of fuel into the mixing passage during the periods that the mixture inlet port is closed.
Claim 21
Dependent Claim
154 words
Charge forming apparatus including, in combination, a body construction provided with an air and fuel mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, an orifice opening into the mixing passage for delivering fuel under the influence of engine aspiration from the fuel chamber into the mixing passage, a throttle valve for controlling flow of fuel and air mixture to an internal combustion engine having a mixture inlet port which is intermittently closed during engine operation, and means disposed in the mixing passage for reducing the velocity of a portion of the mixture flowing in a revErse direction during the periods of closing of the mixture inlet port to reduce aspiration of fuel into the mixing passage during the periods that the mixture inlet port is closed.
Claim 22
Dependent Claim
31 words
The combination according to claim 12 wherein the means in the mixing passage includes a barrier at the upstream side of the region of delivery of fuel into the mixing passage.
Claim 23
Dependent Claim
41 words
The combination according to claim 13 wherein the barrier has an open area for regulating the extent of reduction of the velocity of the mixture flowing in a reverse direction at the region of delivery of fuel into the mixing passage.
Claim 24
Dependent Claim
176 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, a fuel delivery orifice for delivering fuel from the fuel chamber by engine aspiration, a throttle valve for controlling flow of fuel and air mixture to an engine having a mixture inlet port which is intermittently closed during engine operation, means providing a control chamber in the mixing passage into which the fuel is delivered from the orifice, said control chamber having an open area downstream of the mixing passage whereby fuel delivered into the chamber is delivered into the air stream flowing through the mixing passage, said chamber being effective to reduce the velocity of the mixture flowing in a reverse direction at the control chamber during periods of closing of the mixture inlet port to reduce delivery of fuel into the mixing passage during said periods.
Claim 25
Dependent Claim
176 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, a fuel delivery orifice for delivering fuel from the fuel chamber by engine aspiration, a throttle valve for controlling flow of fuel and air mixture to an engine having a mixture inlet port which is intermittently closed during engine operation, means providing a control chamber in the mixing passage into which the fuel is delivered from the orifice, said control chamber having an open area downstream of the mixing passage whereby fuel delivered into the chamber is delivered into the air stream flowing through the mixing passage, said chamber being effective to reduce the velocity of the mixture flowing in a reverse direction at the control chamber during periods of closing of the mixture inlet port to reduce delivery of fuel into the mixing passage during said periods.
Claim 26
Dependent Claim
46 words
The combination according to claim 15 wherein the chamber has a vent opening for controlling the reduction in velocity of the reversely flowing mixture at the chamber to regulate the delivery of fuel into the chamber during the periods that the mixture inlet port is closed.
Claim 27
Dependent Claim
209 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, a fuel orifice for delivering fuel under the influence of engine aspiration, a throttle valve for controlling flow of fuel and air mixture to an engine having a mixture inlet port which is intermittently closed during engine operation, means providing a walled chamber in the mixing passage adjacent the fuel delivery orifice and into which fuel is delivered for distribution into the air stream moving through the mixing passage, said walled chamber having a wall region at the upstream side of the fuel delivery orifice and an outlet downstream of the mixing passage, a lengthwise wall region of the chamber being flared in the downstream direction toward its outlet region, said walled chamber being of a configuration to reduce the velocity of a portion of the mixture flowing in a reverse direction during the periods of closing of the mixture inlet port and reduce delivery of fuel into the mixing passage during the periods that the mixture inlet port is closed.
Claim 28
Dependent Claim
209 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, a fuel orifice for delivering fuel under the influence of engine aspiration, a throttle valve for controlling flow of fuel and air mixture to an engine having a mixture inlet port which is intermittently closed during engine operation, means providing a walled chamber in the mixing passage adjacent the fuel delivery orifice and into which fuel is delivered for distribution into the air stream moving through the mixing passage, said walled chamber having a wall region at the upstream side of the fuel delivery orifice and an outlet downstream of the mixing passage, a lengthwise wall region of the chamber being flared in the downstream direction toward its outlet region, said walled chamber being of a configuration to reduce the velocity of a portion of the mixture flowing in a reverse direction during the periods of closing of the mixture inlet port and reduce delivery of fuel into the mixing passage during the periods that the mixture inlet port is closed.
Claim 29
Dependent Claim
61 words
The combination according to claim 17 wherein the wall of the walled chamber at the upstream side of the fuel delivery orifice has an open area to admit air into the chamber for aerating the fuel delivered into the walled chamber, said open area being of substantially less cross sectional area than the transverse cross sectional area of the control chamber.
Claim 30
Dependent Claim
23 words
The combination according to claim 18 wherein the open area in the wall is at a region spaced from the fuel delivery orifice.
Claim 31
Dependent Claim
43 words
The combination according to claim 18 wherein the open area in the wall of the chamber comprises a plurality of spaced openings, the combined cross sectional area of the openings being substantially less than the transverse cross sectional area of the control chamber.
Claim 32
Dependent Claim
155 words
Charge forming appaRatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, and means disposed in the mixing passage at the region of delivery of fuel from the orifice having a hollow interior for receiving fuel delivered from the orifice, said means having a wall region at the upstream side of the fuel delivery orifice, said means having an outlet downstream of the mixing passage through which fuel from the interior of the means is aspirated into the air stream moving through the mixing passage.
Claim 33
Dependent Claim
155 words
Charge forming appaRatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, and means disposed in the mixing passage at the region of delivery of fuel from the orifice having a hollow interior for receiving fuel delivered from the orifice, said means having a wall region at the upstream side of the fuel delivery orifice, said means having an outlet downstream of the mixing passage through which fuel from the interior of the means is aspirated into the air stream moving through the mixing passage.
Claim 34
Dependent Claim
60 words
The combination according to claim 21 wherein the wall region of the means at the upstream side of the fuel delivery orifice is provided with an open area for admitting air into the interior of the means for aerating the fuel therein, said open area being of less cross sectional area than the cross sectional area of the outlet opening.
Claim 35
Dependent Claim
184 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, the mixing passage including a Venturi configuration, and means disposed in the mixing passage at the region of delivery of fuel from the orifice providing a chamber having its longitudinal axis substantially parallel with the axis of the mixing passage, said chamber adapted to receive fuel from the fuel delivery orifice, said means having a wall region adjacent to and at the upstream side of the fuel delivery orifice, said chamber having an outlet downstream of the mixing passage adjacent the Venturi through which fuel from the interior of the chamber is aspirated into the air stream moving through the mixing passage.
Claim 36
Dependent Claim
184 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, the mixing passage including a Venturi configuration, and means disposed in the mixing passage at the region of delivery of fuel from the orifice providing a chamber having its longitudinal axis substantially parallel with the axis of the mixing passage, said chamber adapted to receive fuel from the fuel delivery orifice, said means having a wall region adjacent to and at the upstream side of the fuel delivery orifice, said chamber having an outlet downstream of the mixing passage adjacent the Venturi through which fuel from the interior of the chamber is aspirated into the air stream moving through the mixing passage.
Claim 37
Dependent Claim
45 words
The combination according to claim 23 wherein the wall region is provided with an open area for admitting air into the chamber for aerating the fuel therein, said open area being of less cross sectional area than the transverse cross sectional area of the chamber.
Claim 38
Dependent Claim
175 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, the mixing passage including a main Venturi, a supplemental Venturi in the main Venturi, a tubular member disposed in the supplemental Venturi at the region of delivery of fuel from the orifice arranged to receive fuel aspirated from the orifice, the axis of the tubular member being normal to the axis of the supplemental Venturi, the wall of the tubular member downstream of the mixing passage having an open area providing an outlet through which fuel from the interior of the member is aspirated into the air stream moving through the mixing passage.
Claim 39
Dependent Claim
175 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, the mixing passage including a main Venturi, a supplemental Venturi in the main Venturi, a tubular member disposed in the supplemental Venturi at the region of delivery of fuel from the orifice arranged to receive fuel aspirated from the orifice, the axis of the tubular member being normal to the axis of the supplemental Venturi, the wall of the tubular member downstream of the mixing passage having an open area providing an outlet through which fuel from the interior of the member is aspirated into the air stream moving through the mixing passage.
Claim 40
Dependent Claim
213 words
Charge forming apparatus including, in combination, a carburetor having a body provided with a fuel and air mixing passage, a fuel chamber in the carburetor body, a flexible diaphragm forming a wall of the fuel chamber, a fuel inlet valve in the body, means transmitting movement of the diaphragm to thE inlet valve to control fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, means disposed in the mixing passage integral with the body providing an elongated chamber adjacent the fuel delivery orifice and into which fuel is delivered from the orifice for distribution into the air stream moving through the mixing passage, said means having a wall at the upstream side of the fuel delivery orifice extending substantially transversely of the axis of the mixing passage, said chamber having an outlet downstream of the mixing passage, said transversely disposed wall having an open area admitting air to the chamber for aerating the fuel in the chamber, said open area in the transversely disposed wall being of less cross sectional area than the cross sectional area of the chamber.
Claim 41
Dependent Claim
213 words
Charge forming apparatus including, in combination, a carburetor having a body provided with a fuel and air mixing passage, a fuel chamber in the carburetor body, a flexible diaphragm forming a wall of the fuel chamber, a fuel inlet valve in the body, means transmitting movement of the diaphragm to thE inlet valve to control fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, means disposed in the mixing passage integral with the body providing an elongated chamber adjacent the fuel delivery orifice and into which fuel is delivered from the orifice for distribution into the air stream moving through the mixing passage, said means having a wall at the upstream side of the fuel delivery orifice extending substantially transversely of the axis of the mixing passage, said chamber having an outlet downstream of the mixing passage, said transversely disposed wall having an open area admitting air to the chamber for aerating the fuel in the chamber, said open area in the transversely disposed wall being of less cross sectional area than the cross sectional area of the chamber.
Claim 42
Dependent Claim
197 words
Charge forming apparatus including, in combination, a carburetor having a body provided with a fuel and air mixing passage, a fuel chamber in the carburetor body, a flexible diaphragm forming a wall of the fuel chamber, a fuel inlet valve in the body, means transmitting movement of the diaphragm to the inlet valve to control fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, means disposed in the mixing passage providing a walled chamber adjacent the fuel delivery orifice and into which fuel is delivered for distribution into the air stream flowing through the mixing passage, said chamber being elongated lengthwise of the mixing passage and having a wall at the upstream side of the fuel delivery orifice disposed substantially transversely of the axis of the mixing passage, said chamber having an outlet downstream of the mixing passage, a lengthwise wall region defining at least a portion of the chamber being flared outwardly in a downstream direction toward the outlet of the chamber.
Claim 43
Dependent Claim
197 words
Charge forming apparatus including, in combination, a carburetor having a body provided with a fuel and air mixing passage, a fuel chamber in the carburetor body, a flexible diaphragm forming a wall of the fuel chamber, a fuel inlet valve in the body, means transmitting movement of the diaphragm to the inlet valve to control fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, means disposed in the mixing passage providing a walled chamber adjacent the fuel delivery orifice and into which fuel is delivered for distribution into the air stream flowing through the mixing passage, said chamber being elongated lengthwise of the mixing passage and having a wall at the upstream side of the fuel delivery orifice disposed substantially transversely of the axis of the mixing passage, said chamber having an outlet downstream of the mixing passage, a lengthwise wall region defining at least a portion of the chamber being flared outwardly in a downstream direction toward the outlet of the chamber.
Claim 44
Dependent Claim
18 words
The combination according to claim 27 wherein the means providing the walled chamber is integral with the body.
Claim 45
Dependent Claim
31 words
The combination according to claim 28 wherein the transversely extending wall of the walled chamber has an opening for admitting air into the chamber for aerating the fuel in the chamber.
Claim 46
Dependent Claim
22 words
The combination according to claim 28 wherein the lengthwise wall region of the chamber has an open area for venting the chamber.
Claim 47
Dependent Claim
226 words
Charge forming apparatus including, in combination, a carburetor having a body provided with a fuel and air mixing passage, a fuel chamber in the carburetor body, a diaphragm forming a wall of the fuel chamber, a fuel inlet valve in the body, means transmitting movement of the diaphragm to the inlet valve to control fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, means disposed in the mixing passage providing an elongated chamber adjacent the fuel delivery orifice and into which fuel is delivered from the orifice for distribution into the air stream moving through the mixing passage, said means having a wall at the upstream side of the fuel delivery orifice extending substantially transversely of the axis of the mixing passage, said chamber having an outlet downstream of the mixing passage, a lengthwise wall region of the chamber being flared outwardly in a downstream direction toward its outlet, said transversely disposed wall having an open area admitting air to the chamber for aerating the fuel in the chamber, said open area in the transversely disposed wall being of less cross sectional area than the transverse cross sectional area of the chamber.
Claim 48
Dependent Claim
226 words
Charge forming apparatus including, in combination, a carburetor having a body provided with a fuel and air mixing passage, a fuel chamber in the carburetor body, a diaphragm forming a wall of the fuel chamber, a fuel inlet valve in the body, means transmitting movement of the diaphragm to the inlet valve to control fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, means disposed in the mixing passage providing an elongated chamber adjacent the fuel delivery orifice and into which fuel is delivered from the orifice for distribution into the air stream moving through the mixing passage, said means having a wall at the upstream side of the fuel delivery orifice extending substantially transversely of the axis of the mixing passage, said chamber having an outlet downstream of the mixing passage, a lengthwise wall region of the chamber being flared outwardly in a downstream direction toward its outlet, said transversely disposed wall having an open area admitting air to the chamber for aerating the fuel in the chamber, said open area in the transversely disposed wall being of less cross sectional area than the transverse cross sectional area of the chamber.
Claim 49
Dependent Claim
163 words
Charge forming apparatus including, in combination, a carburetor having a body provided with a fuel and air mixing passage, a fuel chamber in the carburetor body, a flexible diaphragm forming a wall of the fuel chamber, a fuel inlet valve in the body, means transmitting movement of the diaphragm to the inlet valve to control fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, a member of generally tubular configuration extending into the mixing passage and disposed to receive fuel delivered from the orifice, said member having a cap portion at its end region, the wall region of the tubular member downstream of the mixing passage having an open area providing an outlet for the delivery of fuel from the interior of the tubular member into the mixing passage.
Claim 50
Dependent Claim
163 words
Charge forming apparatus including, in combination, a carburetor having a body provided with a fuel and air mixing passage, a fuel chamber in the carburetor body, a flexible diaphragm forming a wall of the fuel chamber, a fuel inlet valve in the body, means transmitting movement of the diaphragm to the inlet valve to control fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, a member of generally tubular configuration extending into the mixing passage and disposed to receive fuel delivered from the orifice, said member having a cap portion at its end region, the wall region of the tubular member downstream of the mixing passage having an open area providing an outlet for the delivery of fuel from the interior of the tubular member into the mixing passage.
Claim 51
Dependent Claim
30 words
The combination according to claim 32 wherein the wall region of the member upstream of the mixing passage has an opening for admitting air from aerating fuel in the member.
Claim 52
Dependent Claim
171 words
Charge forming apparatus including, in combination, a carburetor having a body provided with a fuel and air mixing passage, said mixing passage including a main Venturi, a fuel chamber in the carburetor body, a diaphragm forming a wall of the fuel chamber, a fuel inlet valve in the body, means transmitting movement of the diaphragm to the inlet valve to control fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, a supplemental Venturi in the mixing passage adjacent the fuel delivery orifice, a member of generally tubular configuration extending into the supplemental Venturi and disposed to receive fuel delivered from the orifice, the wall region of the tubular member downstream of the mixing passage having an open area providing an outlet for the delivery of fuel from the interior of the tubular member into the mixing passage.
Claim 53
Dependent Claim
171 words
Charge forming apparatus including, in combination, a carburetor having a body provided with a fuel and air mixing passage, said mixing passage including a main Venturi, a fuel chamber in the carburetor body, a diaphragm forming a wall of the fuel chamber, a fuel inlet valve in the body, means transmitting movement of the diaphragm to the inlet valve to control fuel flow from a supply into the fuel chamber, a fuel delivery orifice in communication with the fuel chamber for delivering fuel under the influence of engine aspiration, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, a supplemental Venturi in the mixing passage adjacent the fuel delivery orifice, a member of generally tubular configuration extending into the supplemental Venturi and disposed to receive fuel delivered from the orifice, the wall region of the tubular member downstream of the mixing passage having an open area providing an outlet for the delivery of fuel from the interior of the tubular member into the mixing passage.
Claim 54
Dependent Claim
18 words
The combination according to claim 34 wherein said tubular member has a cap portion at its end region.
Claim 55
Dependent Claim
33 words
The combination according to claim 34 wherein the wall region of the tubular member upstream of the mixing passage has an opening for admitting air for aerating the fuel in the tubular member.
Claim 56
Dependent Claim
18 words
The combination according to claim 35 including a vent opening in the cap portion of the tubular member.
Claim 57
Dependent Claim
180 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, an orifice opening into the mixing passage for delivering fuel under the influence of engine aspiration from the fuel chamber into the mixing passage, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, the mixing passage including a Venturi configuration, tubular means disposed in the body at the region of the Venturi, said tubular means providing a chamber in which fuel is delivered from the fuel delivery orifice, the chamber having an outlet downstream of the mixing passage for delivery of fuel from the chamber provided by the tubular member into the mixing passage, said tubular means having a transverse wall upstream of the mixing passage, and a plurality of sapced openings in the transverse wall for admitting air into the chamber for aerating fuel therein.
Claim 58
Dependent Claim
180 words
Charge forming apparatus including, in combination, a body construction provided with a mixing passage and a fuel chamber, a fuel inlet for the body construction, valve means for the fuel inlet, control means for said valve means for regulating fuel flow from a supply into the fuel chamber, an orifice opening into the mixing passage for delivering fuel under the influence of engine aspiration from the fuel chamber into the mixing passage, a throttle valve in the mixing passage for controlling flow of fuel and air mixture, the mixing passage including a Venturi configuration, tubular means disposed in the body at the region of the Venturi, said tubular means providing a chamber in which fuel is delivered from the fuel delivery orifice, the chamber having an outlet downstream of the mixing passage for delivery of fuel from the chamber provided by the tubular member into the mixing passage, said tubular means having a transverse wall upstream of the mixing passage, and a plurality of sapced openings in the transverse wall for admitting air into the chamber for aerating fuel therein.
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |