Patent US3836291A successfully refreshed from Google Patents.
US3836291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump-and-motor unit, particularly for supplying fuel
Assignee: Robert Bosch GmbH
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Filing: 1972-11-28
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Granted: 1974-09-17
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Expires: 1992-11-28
Abstract
Abstract A pump-and-motor unit comprises, within a sealed housing, a lateral channel pump and an electromotor, the rotor of which drives the impeller of the pump. The unit housing has at each end an axially aligned liquid inlet and outlet nipple, respectively. At the pressure side of the pump the liquid is guided from the lateral channel of the pump radially inwardly through a pressure channel provided in a lateral channel plate serving as a pump housing.
Inventors
- 👤 S Bottcher
- 👤 H Speck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:26
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; F; F02; F02M; F02M37/00; F02M37/04; F02M37/048; F02M37/08; F04; F04D; F04D5/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
In a pump-and-motor unit for driving liquid, said unit being of the known type that has (a) a sealed housing defining a motor chamber, (b) a liquid inlet means and a liquid outlet means passing through said housing, (c) an electromotor disposed in said motor chamber and including an armature, (d) means, including bearing means, for rotatably supporting said rotary components of said electromotor, (e) a lateral channel pump disposed in said housing and having means defining a lateral channel, (f) an impeller forming part of said lateral channel pump and driven by said electromotor, the improvement comprising a pressure channel formed in said lateral channel defining means and extending inwardly from said lateral channel in a radial direction with respect to the rotary axis of said impeller, said liquid being driven into said lateral channel and from said lateral channel through said radially extending pressure channel toward said motor chamber.
Claim 2
Dependent Claim
151 words
In a pump-and-motor unit for driving liquid, said unit being of the known type that has (a) a sealed housing defining a motor chamber, (b) a liquid inlet means and a liquid outlet means passing through said housing, (c) an electromotor disposed in said motor chamber and including an armature, (d) means, including bearing means, for rotatably supporting said rotary components of said electromotor, (e) a lateral channel pump disposed in said housing and having means defining a lateral channel, (f) an impeller forming part of said lateral channel pump and driven by said electromotor, the improvement comprising a pressure channel formed in said lateral channel defining means and extending inwardly from said lateral channel in a radial direction with respect to the rotary axis of said impeller, said liquid being driven into said lateral channel and from said lateral channel through said radially extending pressure channel toward said motor chamber.
Claim 3
Dependent Claim
40 words
An improvement as defined in claim 1, said impeller and said armature forming a unitary rotary assembly including channel means for guiding the liquid within said motor chamber, said last-named channel means terminating on the lateral surface of said armature.
Claim 4
Dependent Claim
47 words
An improvement as defined in claim 2, wherein said impeller being affixed to said armature by a plurality of radially extending laminar webs bounding said channel means, whereby said webs acting as vanes drawing liquid from said lateral channel pump and delivering it into said motor chamber.
Claim 5
Dependent Claim
52 words
An improvement as defined in claim 1, wherein said lateral channel defining means comprises a lateral channel plate containing said lateral channel, an annular groove provided in said lateral channel plate and arranged concentrically with respect to the rotary axis of said impeller, said radial pressure channel merging into said annular groove.
Claim 6
Dependent Claim
74 words
An improvement as defined in claim 4, said impeller and said armature forming a unitary rotary assembly adapted to be axially displaced, said rotary assembly including an additional annular groove facing the annular groove provided in said lateral channel plate, channel means provided in said rotary assembly for guiding the liquid within said motor chamber, said last-named channel means extending from said additional annUlar groove and terminating on the lateral surface of said armature.
Claim 7
Dependent Claim
33 words
An improvement as defined in claim 5, including a radial air gap defined between said lateral channel plate and said impeller, both said annular grooves being in communication with said radial air gap.
Claim 8
Dependent Claim
46 words
An improvement as defined in claim 6, said electromotor including stationary magnets disposed in said motor chamber spaced from said armature and offset with respect thereto in the direction of said lateral channel pump for biasing said impeller in the direction of said lateral channel plate.
Claim 9
Dependent Claim
28 words
An improvement as defined in claim 2, including a fixed shaft extending within said housing, said rotary assembly including an axial bore through which said fixed shaft passes.
Claim 10
Dependent Claim
92 words
An improvement as defined in claim 8, including A. a valve channel provided in said lateral channel pump for connecting the pressure side of said lateral channel pump with the suction side thereof, B. a valve plate movably supported on said shaft adjacent that side of said lateral channel plate that is remote from said rotary assembly, said valve plate controlling said valve channel, C. a spring surrounding said shaft and engaging said valve plate and D. an axially adjustable spring support means attached to said shaft and engaged by said spring.
Claim 11
Dependent Claim
109 words
An improvement as defined in claim 1, including A. a unitary rotary assembly formed of said impeller and said armature, B. a lateral channel plate comprising said lateral channel defining means, said plate being disposed axially spaced from said unitary rotary assembly, said lateral channel being provided on that face of said lateral channel plate that is oriented towards said unitary rotary assembly and C. a cavity provided on said face of said lateral channel plate and being spaced downstream of said lateral channel and disposed at the same distance from the rotary axis of said impeller as said lateral channel, said cavity communicating with said radial pressure channel.
Claim 12
Dependent Claim
53 words
An improvement as defined in claim 10, including a channel portion provided in said face of said lateral channel plate, said channel portion constituting a downstream continuation of said lateral channel, said channel portion passing by said cavity at a distance therefrom and having a width smaller than that of said lateral channel.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |