US3556488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor with fluid elements
Assignee: Aisan Industry Co Ltd
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Filing: 1969-07-10
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Granted: 1971-01-19
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Expires: 1989-07-10
Abstract
Abstract A carburetor employing three pure fluid amplifiers for controlling the flow of fuel to a cylinder. Fuel from a source is supplied to the power input of a first amplifier. The power outputs of this amplifier are connected to the power inputs of the other two amplifiers. The fuel supplied to the two amplifiers may be controlled by the amplifiers to flow to the cylinder and/or to return to the fuel source. Pressure within the cylinder is sensed to control the fluid amplifiers whereby fuel is supplied to the cylinder from one of the two amplifiers during idling or partial power output and fuel is supplied to the cylinder from both of the two amplifiers during full power output.
Inventors
- 👤 Toshinori Arikawa
- 👤 Shigetaka Takada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:59
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/10; F02M7/106; Y; Y10; Y10S; Y10S123/00; Y10S123/10; Y10S261/00; Y10S261/69; Y10T; Y10T137/00; Y10T137/206; Y10T137/2065; Y10T137/2071; Y10T137/212; Y10T137/2125; Y10T137/2142
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
165 words
A carburetor for an internal Combustion engine, said carburetor comprising: a primary fluid amplifier through which all fuel must flow to reach said engine; said primary fluid amplifier having a power input for receiving said fuel, first and second power outlets, and a control input for selectively proportioning the fuel received at said power input between said power outlets; first and second secondary fluid amplifiers, said secondary amplifiers each having a power input, first and second power outlets, and a control input for selectively proportioning fuel received at said power input between said power outlets; first means connecting the first and second power outlets of said primary amplifier to the power inputs of said first and second secondary amplifiers, respectively; a cylinder; second means connecting the second power outlet of each secondary amplifier to said cylinder; and third means for sensing the pressure in said cylinder and conveying an indication of said pressure to the control inputs of said primary amplifier and said secondary amplifiers.
Claim 2
Dependent Claim
165 words
A carburetor for an internal Combustion engine, said carburetor comprising: a primary fluid amplifier through which all fuel must flow to reach said engine; said primary fluid amplifier having a power input for receiving said fuel, first and second power outlets, and a control input for selectively proportioning the fuel received at said power input between said power outlets; first and second secondary fluid amplifiers, said secondary amplifiers each having a power input, first and second power outlets, and a control input for selectively proportioning fuel received at said power input between said power outlets; first means connecting the first and second power outlets of said primary amplifier to the power inputs of said first and second secondary amplifiers, respectively; a cylinder; second means connecting the second power outlet of each secondary amplifier to said cylinder; and third means for sensing the pressure in said cylinder and conveying an indication of said pressure to the control inputs of said primary amplifier and said secondary amplifiers.
Claim 3
Dependent Claim
87 words
A carburetor as claimed in claim 1 wherein: the internal configuration of said primary amplifier is such that a major portion of the fuel received at its power input is directed to its second outlet during periods of engine idling when the pressure sensed in said cylinder is at its maximum, a minor portion being directed to the first power outlet of said first amplifier; and said primary amplifier directing proportionately more of said fuel to its first power outlet as the pressure in said cylinder decreases.
Claim 4
Dependent Claim
79 words
A carburetor as claimed in claim 2 wherein fuel flow into said first secondary amplifier is divided and flows out its first and second power outputs during periods of engine idle, said carburetor further including: a throttle valve in said cylinder; said second means including a fluid passage connecting the second power outlet of said first secondary amplifier to said cylinder downstream of said throttle valve; and idle adjusting means for controlling the flow of fluid through said passage.
Claim 5
Dependent Claim
51 words
A carburetor as claimed in claim 3 wherein said first secondary fluid amplifier includes a third power outlet, said power outlets being positioned with respect to the power input and control input whereby more fuel is delivered to said second and said third power outputs as pressure in said cylinder decreases.
Claim 6
Dependent Claim
31 words
A carburetor as claimed in claim 3 and further comprising: a second control input for said second secondary amplifier; and further means for applying a signal to said second control input.
Claim 7
Dependent Claim
32 words
A carburetor as claimed in claim 5 wherein said further means comprises a fluid passage means terminating at an opening in said cylinder, and pressure regulating means in said fluid passage means.
Claim 8
Dependent Claim
43 words
A carburetor as claimed in claim 5 wherein said further means comprise a normally closed fluid valve, and means mechanically linked with said throttle valve for operating said fluid valve, said fluid valve, when operated, connecting said second control input to the atmosphere.
Claim 9
Dependent Claim
40 words
A carburetor as claimed in claim 5 wherein said further means comprise means for sensing the pressure downstream from said throttle valve, and valve means responsive to said last named means for connecting said second control input to the atmosphere.
Claim 10
Dependent Claim
44 words
A carburetor as claimed in claim 5 and further comprising: a source of fuel; means connecting said source to the power input of said primary amplifier; and means connected to said first power outputs of said secondary amplifiers for returning fuel to said source.
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |