US4175103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor
Assignee: Motors Liquidation Co
•
Filing: 1978-11-09
•
Granted: 1979-11-20
•
Expires: 1998-11-09
Abstract
Abstract In a carburetor, an electromagnet energized according to a pulse width modulated duty cycle has a stationary pole member which drives a pair of magnetically responsive valves--one or both being permanently magnetic--to control fuel flow through a main metering orifice and air flow through an idle air bleed.
Inventors
- 👤 Donald D. Stoltman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:10
CPC Classifications
F; F02; F02D; F02D35/00; F02D35/0015; F02D35/0046; F02D35/0053; F02D35/0069; F02M; F02M3/00; F02M3/08; F02M3/09; F02M7/00; F02M7/12; F02M7/133; Y; Y10; Y10S; Y10S261/00; Y10S261/74; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/87153; Y10T137/87161
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
254 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passge, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said one valve and attract the other valve to one of said rich and lean positions when said coil is energized and for causing said pole member to attract said one valve to the other of said rich and lean positions when said coil is deenergized, and means for biasing said other valve to said other positions when said coil is deenergized.
Claim 2
Dependent Claim
254 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passge, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said one valve and attract the other valve to one of said rich and lean positions when said coil is energized and for causing said pole member to attract said one valve to the other of said rich and lean positions when said coil is deenergized, and means for biasing said other valve to said other positions when said coil is deenergized.
Claim 3
Dependent Claim
266 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member and energized according to a duty cycle which causes said pole member to repel said one valve and attract the other valve to one of said rich and lean positions during a portion of the duty cycle and causes said pole member to attract said one valve to the other of said rich and lean positions during the remainder of the duty cycle, and means for biasing said other valve to said other position during the remainder of the duty cycle.
Claim 4
Dependent Claim
266 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member and energized according to a duty cycle which causes said pole member to repel said one valve and attract the other valve to one of said rich and lean positions during a portion of the duty cycle and causes said pole member to attract said one valve to the other of said rich and lean positions during the remainder of the duty cycle, and means for biasing said other valve to said other position during the remainder of the duty cycle.
Claim 5
Dependent Claim
245 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said one valve and attract the other valve to said lean position when said coil is energized and for causing said pole member to attract said one valve to said rich position when said coil is deenergized, and means for biasing said other valve to said rich position when said coil is deenergized.
Claim 6
Dependent Claim
245 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said one valve and attract the other valve to said lean position when said coil is energized and for causing said pole member to attract said one valve to said rich position when said coil is deenergized, and means for biasing said other valve to said rich position when said coil is deenergized.
Claim 7
Dependent Claim
253 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said metering valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said metering valve and attract said bleed valve to one of said rich and lean positions when said coil is energized and for causing said pole member to attract said metering valve to the other of said rich and lean positions when said coil is deenergized, and means for biasing said bleed valve to said other position when said coil is deenergized.
Claim 8
Dependent Claim
253 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said metering valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said metering valve and attract said bleed valve to one of said rich and lean positions when said coil is energized and for causing said pole member to attract said metering valve to the other of said rich and lean positions when said coil is deenergized, and means for biasing said bleed valve to said other position when said coil is deenergized.
Claim 9
Dependent Claim
244 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said metering valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member disposed between said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said metering valve and attract said bleed valve to said lean position when said coil is energized and for causing said pole member to attract said metering valve to said rich position when said coil is deenergized, and means for biasing said bleed valve to said rich position when said coil is deenergized.
Claim 10
Dependent Claim
244 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said metering valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member disposed between said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said metering valve and attract said bleed valve to said lean position when said coil is energized and for causing said pole member to attract said metering valve to said rich position when said coil is deenergized, and means for biasing said bleed valve to said rich position when said coil is deenergized.
Claim 11
Dependent Claim
257 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member and energized according to a duty cycle which causes said pole member to repel said one valve and attract the other valve to said lean position during a portion of the duty cycle and causes said pole member to attract said one valve to said rich position during the remainder of the duty cycle, and means for biasing said other valve to said rich position during the remainder of the duty cycle.
Claim 12
Dependent Claim
257 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member and energized according to a duty cycle which causes said pole member to repel said one valve and attract the other valve to said lean position during a portion of the duty cycle and causes said pole member to attract said one valve to said rich position during the remainder of the duty cycle, and means for biasing said other valve to said rich position during the remainder of the duty cycle.
Claim 13
Dependent Claim
256 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said metering valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member disposed between said valves, an electromagnet coil surrounding said pole member and energized according to a duty cycle which causes said pole member to repel said metering valve and attract said bleed valve to said lean position during a portion of the duty cycle and causes said pole member to attract said metering valve to said rich position during the remainder of the duty cycle, and means for biasing said bleed valve to said rich position during the remainder of said duty cycle.
Claim 14
Dependent Claim
256 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said metering valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member disposed between said valves, an electromagnet coil surrounding said pole member and energized according to a duty cycle which causes said pole member to repel said metering valve and attract said bleed valve to said lean position during a portion of the duty cycle and causes said pole member to attract said metering valve to said rich position during the remainder of the duty cycle, and means for biasing said bleed valve to said rich position during the remainder of said duty cycle.
Claim 15
Dependent Claim
245 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said one valve and attract the other valve to said rich position when said coil is energized and for causing said pole member to attract said one valve to said lean position when said coil is deenergized, and means for biasing said other valve to said lean position when said coil is deenergized.
Claim 16
Dependent Claim
245 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said one valve and attract the other valve to said rich position when said coil is energized and for causing said pole member to attract said one valve to said lean position when said coil is deenergized, and means for biasing said other valve to said lean position when said coil is deenergized.
Claim 17
Dependent Claim
253 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said bleed valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said bleed valve and attract said metering valve to one of said rich and lean positions when said coil is energized and for causing said pole member to attract said bleed valve to the other of said rich and lean positions when said coil is deenergized, and means for biasing said metering valve to said other position when said coil is deenergized.
Claim 18
Dependent Claim
253 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said bleed valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said bleed valve and attract said metering valve to one of said rich and lean positions when said coil is energized and for causing said pole member to attract said bleed valve to the other of said rich and lean positions when said coil is deenergized, and means for biasing said metering valve to said other position when said coil is deenergized.
Claim 19
Dependent Claim
245 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said bleed valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member disposed between said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said bleed valve and attract said metering valve to said rich position when said coil is energized and for causing said pole member to attract said metering valve to said lean position when said coil is deenergized, and means for biasing said metering valve to said lean position when said coil is deenergized.
Claim 20
Dependent Claim
245 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said bleed valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member disposed between said valves, an electromagnet coil surrounding said pole member for causing said pole member to repel said bleed valve and attract said metering valve to said rich position when said coil is energized and for causing said pole member to attract said metering valve to said lean position when said coil is deenergized, and means for biasing said metering valve to said lean position when said coil is deenergized.
Claim 21
Dependent Claim
257 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member and energized according to a duty cycle which causes said pole member to repel said one valve and attract the other valve to said rich position during a portion of the duty cycle and causes said pole member to attract said one valve to said lean position during the remainder of the duty cycle, and means for biasing said other valve to said lean position during the remainder of the duty cycle.
Claim 22
Dependent Claim
257 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least one of said valves is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member associated with said valves, an electromagnet coil surrounding said pole member and energized according to a duty cycle which causes said pole member to repel said one valve and attract the other valve to said rich position during a portion of the duty cycle and causes said pole member to attract said one valve to said lean position during the remainder of the duty cycle, and means for biasing said other valve to said lean position during the remainder of the duty cycle.
Claim 23
Dependent Claim
256 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said bleed valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member disposed between said valves, an electromagnet coil surrounding said pole member and energized according to a duty cycle which causes said pole member to repel said bleed valve and attract said metering valve to said rich position during a portion of the duty cycle and causes said pole member to attract said bleed valve to said lean position during the remainder of the duty cycle, and means for biasing said metering valve to said lean position during the remainder of the duty cycle.
Claim 24
Dependent Claim
256 words
A carburetor comprising main and idle fuel passages, a metering orifice in said main fuel passage, an air bleed opening into said idle fuel passage, and a metering apparatus reciprocable between a rich position and a lean position, said metering apparatus including a metering valve engaged with said metering orifice in said lean position to restrict fuel flow through said main fuel passage and displaced from said metering orifice in said rich position to permit increased fuel flow through said main fuel passage, said metering apparatus further including a bleed valve engaged with said air bleed in said rich position to restrict air flow through said air bleed and thereby permit increased fuel flow through said idle fuel passage and displaced from said air bleed in said lean position to permit increased air flow through said air bleed and thereby restrict fuel flow through said idle fuel passage, wherein said valves are magnetically responsive and at least said bleed valve is permanently magnetic, and wherein said carburetor further comprises an electromagnet pole member disposed between said valves, an electromagnet coil surrounding said pole member and energized according to a duty cycle which causes said pole member to repel said bleed valve and attract said metering valve to said rich position during a portion of the duty cycle and causes said pole member to attract said bleed valve to said lean position during the remainder of the duty cycle, and means for biasing said metering valve to said lean position during the remainder of the duty cycle.
References Cited (Backward Citations)
SU316075A1
Cited
US1207029A
Cited
US1197571A
Cited
US1733348A
Cited
US2220558A
Cited
US2355090A
Cited
US2369698A
Cited
US2791995A
Cited
US2747561A
Cited
US2831471A
Cited
US2914034A
Cited
US2981245A
Cited
US3313532A
Cited
US3409277A
Cited
US3469590A
Cited
US3528455A
Cited
US3460573A
Cited
US3498330A
Cited
US3454264A
Cited
US3425672A
Cited
US3575390A
Cited
US3693947A
Cited
US3706444A
Cited
US3608585A
Cited
US3703888A
Cited
US3667739A
Cited
US3633869A
Cited
US3745983A
Cited
US3827672A
Cited
US3874171A
Cited
US3744346A
Cited
US3827237A
Cited
US3861366A
Cited
US3855974A
Cited
US3942493A
Cited
US3841283A
Cited
US3936516A
Cited
US3872188A
Cited
US3906910A
Cited
US3963009A
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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) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |