Patent US3349809A successfully refreshed from Google Patents.
Patent US3848145A successfully refreshed from Google Patents.
US3848145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor ventilation
Assignee: Robbins & Myers
•
Filing: 1973-01-22
•
Granted: 1974-11-12
•
Expires: 1993-01-22
Abstract
Abstract An electric motor which is capable of self-cooling and which is also capable of cooling elements adjacent thereto when the motor and other operating elements are disposed within a cabinet, or housing, or the like. The motor is provided with means for causing flow of air therethrough in sufficient volume to maintain the motor at a suitable temperature and is also capable of causing flow of air adjacent other elements for the cooling thereof.
Inventors
- 👤 R Goebel
- 👤 G Marous
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:06
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/02; H02K9/04; H02K9/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
213 words
In an electric motor adapted for use within the cabinet of a business machine and including a shell supporting a stator, a rotor extending through said stator and including a rotor shaft, a set of end bells mounted on the end portions of said shell and confining bearings for rotatably supporting said shaft, an air exhaust opening within one end portion of said shell, and a centrifugal fan mounted on said rotor shaft within said one end portion of said shell between said stator and one of said end bells, the improvement comprising an annular radial baffle wall positioned within said shell between said stator and said fan and defining a first air inlet on one axial end of said fan, a substantially cylindrical shroud extending around said fan and having a peripheral opening aligNed with said air exhaust opening within said shell, said cylindrical shroud and said radial baffle wall being integral and forming a unit within said shell, said one end bell defining another air inlet opening on the opposite axial end of said fan, and said one end bell also defining an air exhaust opening disposed radially outwardly of said air inlet opening within said one end bell to effect improved cooling and ventilating of said motor and said cabinet.
Claim 2
Dependent Claim
213 words
In an electric motor adapted for use within the cabinet of a business machine and including a shell supporting a stator, a rotor extending through said stator and including a rotor shaft, a set of end bells mounted on the end portions of said shell and confining bearings for rotatably supporting said shaft, an air exhaust opening within one end portion of said shell, and a centrifugal fan mounted on said rotor shaft within said one end portion of said shell between said stator and one of said end bells, the improvement comprising an annular radial baffle wall positioned within said shell between said stator and said fan and defining a first air inlet on one axial end of said fan, a substantially cylindrical shroud extending around said fan and having a peripheral opening aligNed with said air exhaust opening within said shell, said cylindrical shroud and said radial baffle wall being integral and forming a unit within said shell, said one end bell defining another air inlet opening on the opposite axial end of said fan, and said one end bell also defining an air exhaust opening disposed radially outwardly of said air inlet opening within said one end bell to effect improved cooling and ventilating of said motor and said cabinet.
Claim 3
Dependent Claim
28 words
An electric motor as defined in claim 1 wherein said one end bell defines two of said air exhaust openings disposed circumferentially generally 90* apart adjacent said shell.
Claim 4
Dependent Claim
26 words
An electric motor as defined in claim 1 wherein said unit of said radial baffle wall and said cylindrical shroud comprise a body of plastics material.
Claim 5
Dependent Claim
28 words
An electric motor as defined in claim 1 wherein said shroud includes an inwardly facing and substantially flat tapered surface extending to said peripheral opening within said shroud.
References Cited (Backward Citations)
US2488365A
Cited
US2516184A
Cited
US2512905A
Cited
DE1129224B
Cited
US3175109A
Cited
US3243617A
Cited
US3407317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |