Patent US3777194A successfully refreshed from Google Patents.
US3777194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible motor with protective end bells
Assignee: Franklin Electric Co Inc
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Filing: 1971-10-06
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Granted: 1973-12-04
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Expires: 1991-10-06
Abstract
Abstract This disclosure deals with an electric motor designed for use in a corrosive liquid. The heavy load supporting parts at the ends of the motor are made of a strong but corrodable metal, and these parts are protected against corrosion by covers of a corrosionresistant material. Holes are formed in one of the end parts and its cover to receive a power input connector, and a corrosionresistant sleeve is mounted in the holes and around the connector to protect this end part against corrosion and also to anchor a plug of the connector. One cover has aligning portions formed thereon which are adapted to fit mating aligning portions of a mechanism such as a pump to be driven by the motor. The other cover both protects the associated end part against corrosion and serves to support a pressure-equalizing device of the motor.
Inventors
- 👤 E Schaefer
- 👤 A Refice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:46
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K5/1285; H02K15/00; H02K15/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
139 words
An electric motor for operation while submerged in a corrosive liquid and adapted to be connected to drive a mechanism having an aligning surface thereon, comprising a stator, an end bell secured to one end of said stator, said end bell including a plurality of spaced apart aligning means conforming generally to said surface but being undersized relative to said surface, a sheet material cover made of a corrosion-resistant material and covering said end bell, said cover including a plurality of spaced apart preformed aligning means conforming to and having a close fit only with the respective aligning means of said end bell, the overal dimensions of said aligning means of said end bell and said cover having a close fit with said aligning surface of said mechanism and thus accurately locating said mechanism relative to said end bell.
Claim 2
Dependent Claim
139 words
An electric motor for operation while submerged in a corrosive liquid and adapted to be connected to drive a mechanism having an aligning surface thereon, comprising a stator, an end bell secured to one end of said stator, said end bell including a plurality of spaced apart aligning means conforming generally to said surface but being undersized relative to said surface, a sheet material cover made of a corrosion-resistant material and covering said end bell, said cover including a plurality of spaced apart preformed aligning means conforming to and having a close fit only with the respective aligning means of said end bell, the overal dimensions of said aligning means of said end bell and said cover having a close fit with said aligning surface of said mechanism and thus accurately locating said mechanism relative to said end bell.
Claim 3
Dependent Claim
36 words
An electric motor as in claim 1, wherein said aligning surface of said mechanism comprises a generally circular surface, said aligning means of said end bell and said aligning means of said cover being circumferentially spaced.
Claim 4
Dependent Claim
94 words
An electric motor as in claim 1, wherein said stator further includes a cylindrical outer shell of a corrosion-resistant material, a second end bell at the other end of said stator, said stator and said end bells being secured together with one of said end bells at each end of said shell, a rotor rotatably supported by said end bells, and a second cover made of a corrosion-resistant material and extending over the outer surface of said second end bell, each cover further overlapping the adjacent portion of saiD shell in tight fitting relation.
Claim 5
Dependent Claim
54 words
An electric motor as in claim 1, wherein aligned openings are formed in said end bell and said cover for a power input connector, and a sleeve made of a corrosion-resistant material, said sleeve being mounted in said opening in said end bell and protecting the wall of said opening in said end bell.
Claim 6
Dependent Claim
27 words
An electric motor as in claim 4, wherein said sleeve is fastened to said end bell, and a part of said connector is connectable to said sleeve.
Claim 7
Dependent Claim
80 words
An electric motor as in claim 1, wherein said motor includes a shaft, said end bell and said cover being at the upper end of said motor and having aligned openings formed therein, said shaft extending upwardly through said openings, a sand slinger fastened to said shaft above said cover and having a downwardly turned outer edge portion, and the marginal portion of said cover around said opening being turned upwardly within said outer edge portion of said sand slinger.
Claim 8
Dependent Claim
82 words
An electric motor as in claim 1, and further including an opening formed through said end bell, a first electrical connector part fastened to said stator at said opening, said opening being adapted to receive a second connector part which mates with said first part, an opening formed in said cover for said second connector part, and a corrosion-resistant sleeve mounted in said openings and around said connector parts for protecting the wall of the opening in said end bell against corrosion.
Claim 9
Dependent Claim
16 words
An electric motor as in claim 7, wherein said sleeve is fastened to said end bell.
Claim 10
Dependent Claim
37 words
An electric motor as in claim 8, wherein said end bell has an anchoring groove formed therein, and said sleeve has flanges thereon which are located in said groove to fasten said sleeve to said end bell.
Claim 11
Dependent Claim
29 words
An electric motor as in claim 9, wherein said second connector part has an orienting boss thereon, and said sleeve has an orienting groove therein which receives said boss.
Claim 12
Dependent Claim
80 words
An electric motor as in claim 7, wherein said cover extends over one face of said end bell and said end bell has a groove formed in the other face thereof, and said sleeve extends through said openings in said end bell and said cover and has at least one flange formed thereon, said flange being located in said groove, whereby said flange and said groove prevent said sleeve turning and also hold said sleeve against movement on its axis.
Claim 13
Dependent Claim
53 words
An electric motor as in claim 11, wherein said sleeve has an axial groove formed in the side thereof, said groove being adapted to receive an aligning boss of said second connector part, said flange in said groove of said end bell serving to orient said axial groove relative to said end bell.
Claim 14
Dependent Claim
23 words
An electric motor as in claim 12, wherein said groove in said end bell is arcuate and said flange is similarly arcuately shaped.
Claim 15
Dependent Claim
52 words
An electric motor as in claim 3, wherein said second end bell has an opening therein, and a pressure equalizing device positioned in said opening and supported by said second cover, said second cover thus serving both to protect said end bell against corrosion and also to support said pressure equalizing device.
Claim 16
Dependent Claim
35 words
An electric motor as in claim 3, wherein said second cover has an edge portion extending beyond said end bell and into firm abutting relation with the edge of the adjacent end of said shell.
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |