Patent US3600601A successfully refreshed from Google Patents.
US3600601A
Expired / Lapsed
US
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Pressure modulator switch for electric fuel pump
Assignee: Motors Liquidation Co
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Filing: 1969-12-15
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Granted: 1971-08-17
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Expires: 1989-12-15
Abstract
Abstract An electric fuel pump for a motor vehicle is provided with two modes of operation such that the pump will provide a high pressure at high flow rates in one mode of operation and a lower pressure at low flow rates in a second mode of operation.
Inventors
- 👤 John A Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:36
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/2607; H01H35/2614; H01H35/2621
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A system for controlling the flow of fuel from a vehicle fuel tank to a carburetor including an electric fuel pump, a source of fuel, a carburetor, conduit means connecting said fuel pump between said source of fuel and said carburetor, an electric circuit for said fuel pump including a source of power and a resistance element electriCally connected in series with said fuel pump, and a pressure actuated switch responsive to pressure in said conduit means for electrically shorting said resistor when the fuel pressure in said conduit means is below a predetermined value.
Claim 2
Independent Claim
95 words
A system for controlling the flow of fuel from a vehicle fuel tank to a carburetor including an electric fuel pump, a source of fuel, a carburetor, conduit means connecting said fuel pump between said source of fuel and said carburetor, an electric circuit for said fuel pump including a source of power and a resistance element electriCally connected in series with said fuel pump, and a pressure actuated switch responsive to pressure in said conduit means for electrically shorting said resistor when the fuel pressure in said conduit means is below a predetermined value.
Claim 3
Dependent Claim
68 words
A system for controlling the flow of fuel as defined by claim 1 wherein said pressure actuated switch is provided with a pair of spaced electrical contacts, magnetizable conductive bridging means adapted to bridge said contacts and complete an electrical circuit therethrough, and a magnet positioned adjacent said bridging means to maintain said contacts closed when the fuel pressure in said conduit means is below a predetermined value.
Claim 4
Dependent Claim
55 words
A system for controlling the flow of fuel as defined by claim 2 wherein a pressure actuated diaphragm is positioned adjacent said magnet and means are provided to mechanically connect said bridging member to said diaphragm such that said contacts are opened when the pressure in said fuel conduit means is above a predetermined value.
References Cited (Backward Citations)
US3068364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |