US4134712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel supply unit consisting of a pump and an electromotor
Assignee: Robert Bosch GmbH
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Filing: 1977-05-02
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Granted: 1979-01-16
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Expires: 1997-05-02
Abstract
Abstract This invention relates to a pump and motor unit which is particularly adapted for supplying fuel and which comprises a pump rotor and motor armature, the bearings of which are disposed independently of each other on a fixed axis.
Inventors
- 👤 Ulrich Kemmner
- 👤 Karl Ruhl
- 👤 Rainer Schillinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:54
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/047; F02; F02M; F02M37/00; F02M37/04; F02M37/08; F04C; F04C11/00; F04C11/008; F04C15/00; F04C15/0057; F04C15/0061; F04D13/00; F04D13/02; F04D13/06; F04D13/0653; F04D29/049; H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1672; H02K5/12; Y; Y10; Y10S; Y10S464/00; Y10S464/902; Y10S464/903; Y10T; Y10T403/00; Y10T403/57; Y10T403/5706; Y10T403/5713
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
A fuel supply unit comprising a pump having a rotor and an electromotor having an armature, a rigid mounting shaft common to said pump rotor and said electromotor armature, first bearing means for rotatably mounting said pump rotor on said shaft, second bearing means independent of said first bearing means for rotatably mounting said armature on said shaft independently of said pump rotor, a separate axially extending, coupling member disposed in concentric relationship with said shaft between said pump rotor and said motor armature, means on said coupling member and adjacent portions of said pump rotor and said motor armature arranged for driving engagement to thereby form a driving connection between said motor armature and said pump rotor.
Claim 2
Dependent Claim
118 words
A fuel supply unit comprising a pump having a rotor and an electromotor having an armature, a rigid mounting shaft common to said pump rotor and said electromotor armature, first bearing means for rotatably mounting said pump rotor on said shaft, second bearing means independent of said first bearing means for rotatably mounting said armature on said shaft independently of said pump rotor, a separate axially extending, coupling member disposed in concentric relationship with said shaft between said pump rotor and said motor armature, means on said coupling member and adjacent portions of said pump rotor and said motor armature arranged for driving engagement to thereby form a driving connection between said motor armature and said pump rotor.
Claim 3
Dependent Claim
30 words
A fuel supply unit as claimed in claim 1, in which said first bearing means includes a displaceable ring member that is mounted within a bore in said pump rotor.
Claim 4
Dependent Claim
29 words
A fuel supply unit as claimed in claim 1, in which the pump includes a perforated base plate and means spaced therefrom cooperate therewith to support said pump rotor.
Claim 5
Dependent Claim
29 words
A fuel supply unit as claimed in claim 3, in which said means spaced from said base plate includes an aperture and a bearing extends axially through said aperture.
Claim 6
Dependent Claim
33 words
A fuel supply unit as claimed in 1, in which the pump rotor bore includes radially extending recesses and including tangs on the adjacent portion of said coupling member received in said recesses.
Claim 7
Dependent Claim
35 words
A fuel supply unit as claimed in claim 5, in which the motor armature includes extensions supported thereon and including recesses in the adjacent portion of said coupling member in which said extensions are received.
Claim 8
Dependent Claim
33 words
A fuel supply unit as claimed in claim 1, in which the shaft of said motor armature includes groove means and retainer means which cooperate therewith to prevent axial movement of said armature.
Claim 9
Dependent Claim
32 words
A fuel supply unit as claimed in claim 7, in which said shaft is telescoped by a rigid tubular member that has opposite end portions that terminate adjacent to said retainer means.
Claim 10
Dependent Claim
22 words
A fuel supply unit as claimed in claim 8, in which said opposite end portions of said tubular member include journal bearings.
Claim 11
Dependent Claim
44 words
A fuel supply unit as claimed in claim 9, in which said journal bearings comprise steel sleeve elements within which is disposed a copper layer provided with a porous tin bronze layer, said last named layer having its pores filled with PTFE and lead.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |