US3897179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping unit for liquids
Assignee: Robert Bosch GmbH
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Filing: 1974-01-11
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Granted: 1975-07-29
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Expires: 1994-01-11
Abstract
Abstract A pump is mounted in a housing, and also mounted in the housing is an electromotor which drives the pump. The electromotor has a stationary shaft, a sleeve which surrounds the shaft and is turnable relative to the same, being journalled thereon, an armature which is mounted on the sleeve and a collector which is also mounted on the sleeve. This arrangement facilitates the lubrication of the movable components of the electromotor as compared with constructions wherein the collector and armature are mounted directly on the shaft and it also provides for a more rigid construction.
Inventors
- 👤 Paul Fussner
- 👤 Hermann Nusser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:51
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; F; F02; F02M; F02M37/00; F02M37/04; F02M37/08; F04; F04C; F04C11/00; F04C11/008; H02K5/16; H02K5/167; H02K5/1677; H02K7/00; H02K7/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
143 words
In a pumping unit for liquids, particularly for liquid fuels, a combination comprising a housing; a pump in said housing; an electromotor in said housing and connected with said pump for driving the same, said electromotor comprising a stationary shaft, a sleeve surrounding said shaft and being turnable relative to the same, said sleeve having opposite axial end portions, each provided with a recess in an inner circumferential surface of said sleeve, an armature mounted on said sleeve, and a collector also mounted on said sleeve; and a pair of journals, each received in one of said recesses and journalling said sleeve on said shaft, said journals being of sintered material and being press-fitted into the respective recess and having respective inner diameters slightly smaller than the inner diameter of said sleeve so that the latter surrounds said shaft with a slight clearance.
Claim 2
Dependent Claim
143 words
In a pumping unit for liquids, particularly for liquid fuels, a combination comprising a housing; a pump in said housing; an electromotor in said housing and connected with said pump for driving the same, said electromotor comprising a stationary shaft, a sleeve surrounding said shaft and being turnable relative to the same, said sleeve having opposite axial end portions, each provided with a recess in an inner circumferential surface of said sleeve, an armature mounted on said sleeve, and a collector also mounted on said sleeve; and a pair of journals, each received in one of said recesses and journalling said sleeve on said shaft, said journals being of sintered material and being press-fitted into the respective recess and having respective inner diameters slightly smaller than the inner diameter of said sleeve so that the latter surrounds said shaft with a slight clearance.
Claim 3
Dependent Claim
32 words
A combination as defined in claim 1, said sleeve being of constant outer diameter, and said armature comprising a stack of lamellae which is press-fitted onto said sleeve exteriorly of the latter.
Claim 4
Dependent Claim
19 words
A combination as defined in claim 2, wherein said collector is press-fitted onto said sleeve exteriorly of the latter.
Claim 5
Dependent Claim
27 words
A combination as defined in claim 2, wherein said collector is press-fitted onto said sleeve exteriorly of the latter and adjacent one axial end of said armature.
Claim 6
Dependent Claim
122 words
In a pumping unit for liquids, particularly for liquid fuels, a combination comprising a housing; a pump having a rotary impeller in said housing; an electromotor in said housing and connected with said pump for driving the same, said electromotor comprising a stationary shaft, a sleeve of constant outer diameter surrounding said shaft and being turnable relative to the same, an armature including a stack of lamellae which is press-fitted onto said sleeve exteriorly of the latter, a colLector also press-fitted onto said sleeve exteriorly of the latter and adjacent one axial end of said armature; and a bushing press-fitted onto said sleeve adjacent an opposite axial end of said armature and provided with a groove for mutual engagement with said impeller.
Claim 7
Dependent Claim
122 words
In a pumping unit for liquids, particularly for liquid fuels, a combination comprising a housing; a pump having a rotary impeller in said housing; an electromotor in said housing and connected with said pump for driving the same, said electromotor comprising a stationary shaft, a sleeve of constant outer diameter surrounding said shaft and being turnable relative to the same, an armature including a stack of lamellae which is press-fitted onto said sleeve exteriorly of the latter, a colLector also press-fitted onto said sleeve exteriorly of the latter and adjacent one axial end of said armature; and a bushing press-fitted onto said sleeve adjacent an opposite axial end of said armature and provided with a groove for mutual engagement with said impeller.
Claim 8
Dependent Claim
15 words
A combination as defined in claim 5, wherein said bushing is of synthetic plastic material.
Claim 9
Dependent Claim
139 words
In a pumping unit for liquids, particularly for liquid fuels, a combination comprising a housing; a pump in said housing; an electromotor in said housing and connected with said pump for driving the same, said electromotor comprising a stationary shaft of constant diameter, a sleeve surrounding said shaft and being turnable relative to the same, said sleeve having opposite end portions and being of relatively larger diameter than said shaft so as to define an axial space therewith, an armature mounted on said sleeve, and a collector also mounted on said sleeve; and a pair of journals of porous sinter material provided on said opposite end portions and journalling said sleeve on said shaft and communicating with said axial space, so that the pumped liquid can permeate through said journals into said axial space and lubricate said turnable sleeve.
Claim 10
Dependent Claim
139 words
In a pumping unit for liquids, particularly for liquid fuels, a combination comprising a housing; a pump in said housing; an electromotor in said housing and connected with said pump for driving the same, said electromotor comprising a stationary shaft of constant diameter, a sleeve surrounding said shaft and being turnable relative to the same, said sleeve having opposite end portions and being of relatively larger diameter than said shaft so as to define an axial space therewith, an armature mounted on said sleeve, and a collector also mounted on said sleeve; and a pair of journals of porous sinter material provided on said opposite end portions and journalling said sleeve on said shaft and communicating with said axial space, so that the pumped liquid can permeate through said journals into said axial space and lubricate said turnable sleeve.
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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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |