Patent US3754844A successfully refreshed from Google Patents.
US3754844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump and electric drive motor unit
Assignee: Robert Bosch GmbH
•
Filing: 1972-07-27
•
Granted: 1973-08-28
•
Expires: 1992-07-27
Abstract
Abstract There is described a pump assembly which, in a unitary structure, comprises a pump proper and an electric pump drive motor, both contained in a common housing. The pump housing which is disposed within the common housing, has a bearing tube in which journals a shaft carrying the pump impeller and, spaced therefrom, a bell-shaped motor armature surrounding a substantial portion of the bearing tube.
Inventors
- 👤 H Nusser
- 👤 Eeden H Van
- 👤 J Ebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:02
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/04; F02M37/08; F04; F04C; F04C11/00; F04C11/008; F04C15/00; H; H02; H02K; H02K5/00; H02K5/04; H02K5/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
156 words
A pump unit comprising A. an external housing having an inlet opening and an outlet opening, B. a pump housing contained in said external housing and formed of 1. a base plate, 2. an intermediate plate and 3. a bearing plate, all said plates being in a stacked relationship, C. a pump work chamber provided in said pump housing, D. a bearing tube affixed to said bearing plate and extending outwardly and away from said pump housing, E. a shaft journalling in said bearing tube and projecting beyond both ends thereof, F. a pump impeller situated in said pump work chamber and affixed to one end of said shaft and G. a bell-shaped motor armature affixed to said shaft beyond the end of said bearing tube remote from said pump housing, said motor armature surrounding a substantial length portion of said bearing tube and being exposed to the flow of liquid medium through said pump unit.
Claim 2
Dependent Claim
156 words
A pump unit comprising A. an external housing having an inlet opening and an outlet opening, B. a pump housing contained in said external housing and formed of 1. a base plate, 2. an intermediate plate and 3. a bearing plate, all said plates being in a stacked relationship, C. a pump work chamber provided in said pump housing, D. a bearing tube affixed to said bearing plate and extending outwardly and away from said pump housing, E. a shaft journalling in said bearing tube and projecting beyond both ends thereof, F. a pump impeller situated in said pump work chamber and affixed to one end of said shaft and G. a bell-shaped motor armature affixed to said shaft beyond the end of said bearing tube remote from said pump housing, said motor armature surrounding a substantial length portion of said bearing tube and being exposed to the flow of liquid medium through said pump unit.
Claim 3
Dependent Claim
4 words
an intermediate plate and
Claim 4
Dependent Claim
4 words
an intermediate plate and
Claim 5
Dependent Claim
17 words
A pump unit as defined in claim 1, said motor armature comprising A. a sleeve-shaped support having
Claim 6
Dependent Claim
82 words
a second portiOn integral with said first portion and surrounding said bearing tube with a clearance, B. a stack of sheet metal discs carried on said second portion of said sleeve-shaped support, C. a coil carried on said sleeve-shaped support and surrounding said stack of sheet metal discs, D. a collector affixed to said shaft adjacent said first portion of said sleeve-shaped support and E. a coherent envelope of synthetic material encasing said coil and at least one part of said collector.
Claim 7
Dependent Claim
82 words
a second portiOn integral with said first portion and surrounding said bearing tube with a clearance, B. a stack of sheet metal discs carried on said second portion of said sleeve-shaped support, C. a coil carried on said sleeve-shaped support and surrounding said stack of sheet metal discs, D. a collector affixed to said shaft adjacent said first portion of said sleeve-shaped support and E. a coherent envelope of synthetic material encasing said coil and at least one part of said collector.
Claim 8
Dependent Claim
104 words
A pump unit as defined in claim 1, said shaft having A. a first length portion extending within said bearing tube and having a reduced diameter to provide a clearance between said bearing tube and said shaft along said first length portion, B. a second length portion extending from said first length portion to one end of said bearing tube and constituting a bearing face in sliding engagement with said bearing tube and C. a third length portion extending from said first length portion to the other end of said bearing tube and constituting a bearing face in sliding engagement with said bearing tube.
Claim 9
Dependent Claim
118 words
a bearing plate, all said plates being in a stacked relationship, C. a pump work chamber provided in said pump housing, D. a bearing tube affixed to said bearing plate and extending outwardly and away from said pump housing, E. a shaft journalling in said bearing tube and projecting beyond both ends thereof, F. a pump impeller situated in said pump work chamber and affixed to one end of said shaft and G. a bell-shaped motor armature affixed to said shaft beyond the end of said bearing tube remote from said pump housing, said motor armature surrounding a substantial length portion of said bearing tube and being exposed to the flow of liquid medium through said pump unit.
Claim 10
Dependent Claim
118 words
a bearing plate, all said plates being in a stacked relationship, C. a pump work chamber provided in said pump housing, D. a bearing tube affixed to said bearing plate and extending outwardly and away from said pump housing, E. a shaft journalling in said bearing tube and projecting beyond both ends thereof, F. a pump impeller situated in said pump work chamber and affixed to one end of said shaft and G. a bell-shaped motor armature affixed to said shaft beyond the end of said bearing tube remote from said pump housing, said motor armature surrounding a substantial length portion of said bearing tube and being exposed to the flow of liquid medium through said pump unit.
Claim 11
Dependent Claim
90 words
A pump unit as defined in claim 1, including A. a tubular support structure made of synthetic material and surrounding said armature with a clearance, said tubular support structure having a plurality of circumferentially arranged depressions on its outer face, B. a plurality of permanent magnets forming part of said motor and nesting in said depressions and C. a tubular metal member made of a magnetically conductive material and tightly surrounding said tubular support structure, said tubular metal member and said tubular support structure being disposed in said external housing.
Claim 12
Dependent Claim
21 words
A pump unit as defined in claim 1, including an inlet nipple formed as an integral part of said external housing.
Claim 13
Dependent Claim
29 words
A pump unit as defined in claim 4, including an outlet nipple formed as an integral part of said tubular support structure and projecting outwardly from said external housing.
Claim 14
Dependent Claim
17 words
A pump unit as defined in claim 6, including a check valve situated in said outlet nipple.
Claim 15
Dependent Claim
30 words
A pump unit as defined in claim 1, said external housing having a rotationally symmetrical configuration; said base plate, said intermediate plate and said bearing plate having a circular outline.
Claim 16
Dependent Claim
22 words
A pump unit as defined in claim 1, at least said base plate and said intermediate plate being made of sintered steel.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |