US3969044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel pump assembly
Assignee: Robert Bosch GmbH
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Filing: 1974-01-18
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Granted: 1976-07-13
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Expires: 1994-01-18
Abstract
Abstract A fuel pump assembly wherein an elongated tubular housing surrounds a fuel pump and an electric motor and has a fuel-admitting inlet at one end and a fuel-discharging outlet at the other end. The rotor of the electric motor drives the pump rotor through the medium of several axially parallel elastic pins which extend into complementary sockets of the pump rotor. The pump rotor rotates directly on a shaft which is fixedly mounted in the housing. The rotor of the electric motor rotates on several friction bearings consisting of sinter metal and surrounding the fixedly mounted shaft. The pins form part of an elastomeric casing which surrounds a portion of or the entire rotor of the electric motor. Some fuel flows from the pressure side of the pump into an annular space between the shaft and the pump rotor and thence toward the outlet by flowing through the bearings as well as through a sleeve which supports the rotor of the electric motor and rotates with the bearings.
Inventors
- 👤 Paul Fussner
- 👤 Horst Salmanzig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:45
CPC Classifications
F; F04; F04C; F04C11/00; F04C11/008; F02; F02M; F02M37/00; F02M37/04; F02M37/08; H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1677; H02K7/00; H02K7/14; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
141 words
In an apparatus for conveying a liquid, particularly fuel, a combination comprising a housing having a liquid admitting inlet and a liquid discharging outlet; a shaft fixedly mounted in said housing; an electric motor installed in said housing and including a first rotor mounted on and rotatable relative to said shaft; a pump installed in said housing and having a second rotor mounted on and rotatable relative to said shaft to thereby cause a liquid to flow from said inlet to said outlet, said second rotor having five axially extending sockets; said first rotor comprising a cylindrical extension extending short of said second rotor; and elastic torque-transmitting means connecting said rotors and comprising five discrete complementary projections for each of said sockets each projecting in axial direction from said cylindrical extension into each of said respective sockets of said second rotor.
Claim 2
Dependent Claim
141 words
In an apparatus for conveying a liquid, particularly fuel, a combination comprising a housing having a liquid admitting inlet and a liquid discharging outlet; a shaft fixedly mounted in said housing; an electric motor installed in said housing and including a first rotor mounted on and rotatable relative to said shaft; a pump installed in said housing and having a second rotor mounted on and rotatable relative to said shaft to thereby cause a liquid to flow from said inlet to said outlet, said second rotor having five axially extending sockets; said first rotor comprising a cylindrical extension extending short of said second rotor; and elastic torque-transmitting means connecting said rotors and comprising five discrete complementary projections for each of said sockets each projecting in axial direction from said cylindrical extension into each of said respective sockets of said second rotor.
Claim 3
Dependent Claim
12 words
A combination as defined in claim 1, wherein said projections are pins.
Claim 4
Dependent Claim
15 words
A combination as defined in claim 1, wherein said second rotor consists of sinter material.
Claim 5
Dependent Claim
21 words
A combination as defined in claim 1, wherein said second rotor defines a clearance and is rotatable directly on said shaft.
Claim 6
Dependent Claim
35 words
A combination as defined in claim 1, wherein said second rotor has an axial bore whose diameter exceeds the diameter of said shaft so that said shaft and said second rotor define an annular space.
Claim 7
Dependent Claim
36 words
A combination as defined in claim 5, wherein said pump comprises a stationary portion defining with said second rotor a working chamber for conveyed liquid and at least one passage connecting said chamber with said space.
Claim 8
Dependent Claim
35 words
A combination as defined in claim 13, further comprising bearings interposed between said shaft and said first rotor and arranged to receive liquid from said annular space whereby such liquid cools and lubricates said bearings.
Claim 9
Dependent Claim
14 words
A combination as defined in claim 7, wherein said bearings consist of sintered material.
Claim 10
Dependent Claim
17 words
A combination as defined in claim 1, wherein said projections are formed from elastomeric synthetic plastic material.
Claim 11
Dependent Claim
22 words
A combination as defined in claim 1, wherein said cylindrical extension and said projections are integrally formed from elastomeric synthetic plastic material.
Claim 12
Dependent Claim
167 words
In an apparatus for conveying a liquid, particularly fuel, a combination comprising a housing having a liquid admitting inlet and a liquid discharging outlet; a shaft fixedly mounted in said housing; an electric motor installed in said housing and including a first rotor comprising an armature, a commutator and a casing of elastomeric synthetic plastic material, said first rotor being mounted on and rotatable relative to said shaft; a pump installed in said housing and having a second rotor mounted on and rotatable relative to said shaft to thereby cause a liquid to flow from said inlet to said outlet, said casing comprising a cylindrical extension surrounding said shaft and ending short of said second rotor; and elastic torque-transmitting means forming an integral part of said casing of elastomeric synthetic plastic material and connecting said rotors, said elastic torque-transmitting means comprising at least one pin-shaped projection integral with and projecting axially from said cylindrical extension and a complementary socket in said second rotor receiving said pin-shaped projection.
Claim 13
Dependent Claim
167 words
In an apparatus for conveying a liquid, particularly fuel, a combination comprising a housing having a liquid admitting inlet and a liquid discharging outlet; a shaft fixedly mounted in said housing; an electric motor installed in said housing and including a first rotor comprising an armature, a commutator and a casing of elastomeric synthetic plastic material, said first rotor being mounted on and rotatable relative to said shaft; a pump installed in said housing and having a second rotor mounted on and rotatable relative to said shaft to thereby cause a liquid to flow from said inlet to said outlet, said casing comprising a cylindrical extension surrounding said shaft and ending short of said second rotor; and elastic torque-transmitting means forming an integral part of said casing of elastomeric synthetic plastic material and connecting said rotors, said elastic torque-transmitting means comprising at least one pin-shaped projection integral with and projecting axially from said cylindrical extension and a complementary socket in said second rotor receiving said pin-shaped projection.
References Cited (Backward Citations)
US975532A
Cited
GB322778A
Cited
FR1041153A
Cited
GB949070A
Cited
US3212449A
Cited
US3754844A
Cited
US3801231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |