Patent US4074158A successfully refreshed from Google Patents.
US4074158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor assembly
Assignee: Individual
•
Filing: 1976-05-14
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Granted: 1978-02-14
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Expires: 1996-05-14
Abstract
Abstract An electric motor assembly has a stator assembly provided with a stator winding and an adjacent air gap aperture. A support member is provided at one end of the air gap aperture for positioning a non-rotatable rotor shaft in the air gap aperture. A rotor assembly has a central aperture in which first and second bearing are positioned. Each bearing is seated at one end against a beveled portion at an end of the rotor central aperture. The other end of each bearing is retained and biased against the beveled portion by a retaining spring secured to the rotor assembly. The first and second bearing rotatably engage the rotor shaft and permit the rotor assembly to rotate about the rotor shaft in the air gap aperture.
Inventors
- 👤 James D. Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:17
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1677; H02K2205/00; H02K2205/03
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
131 words
An electric motor assembly comprising: (a) a stator assembly having a stator winding and an adjacent air gap aperture, and a support member on said stator assembly at one end of said air gap aperture; (b) a rotor shaft non-rotatably mounted to said support member and aligned in said air gap aperture; (c) a rotor assembly having laminations and a central aperture in the laminations, first and second self-aligning bearing means positioned in said central aperture, each bearing means having a curved surface seated at one end against a seating portion formed on the laminations at an end of said central aperture and retained at the other end by a retaining spring abutting a curved surface of the bearing means, said first and second bearing means rotatably engaging said rotor shaft.
Claim 2
Dependent Claim
131 words
An electric motor assembly comprising: (a) a stator assembly having a stator winding and an adjacent air gap aperture, and a support member on said stator assembly at one end of said air gap aperture; (b) a rotor shaft non-rotatably mounted to said support member and aligned in said air gap aperture; (c) a rotor assembly having laminations and a central aperture in the laminations, first and second self-aligning bearing means positioned in said central aperture, each bearing means having a curved surface seated at one end against a seating portion formed on the laminations at an end of said central aperture and retained at the other end by a retaining spring abutting a curved surface of the bearing means, said first and second bearing means rotatably engaging said rotor shaft.
Claim 3
Dependent Claim
35 words
The motor assembly of claim 1 in which said first and second bearing means comprise the approximate shape of a sphere having truncated end portions and a central aperture for rotatably engaging said rotor shaft.
Claim 4
Dependent Claim
139 words
An electric motor assembly comprising: (a) a stator assembly having a stator winding and an adjacent air gap aperture, and a support member on said stator assembly at one end of said air gap aperture; (b) a rotor shaft non-rotatably mounted to said support member and aligned in said air gap aperture; (c) a rotor assembly having a central aperture, first and second bearing means positioned in said central aperture, each bearing means being seated at one end against a seating portion of said central aperture and retained at the other end by a retaining spring, said first and second bearing means rotatably engaging said rotor shaft; and (d) said retaining spring having a circular shape with an upturned lip, an end of said lip being seated in a notch on the sidewall of said rotor assembly central aperture.
Claim 5
Dependent Claim
139 words
An electric motor assembly comprising: (a) a stator assembly having a stator winding and an adjacent air gap aperture, and a support member on said stator assembly at one end of said air gap aperture; (b) a rotor shaft non-rotatably mounted to said support member and aligned in said air gap aperture; (c) a rotor assembly having a central aperture, first and second bearing means positioned in said central aperture, each bearing means being seated at one end against a seating portion of said central aperture and retained at the other end by a retaining spring, said first and second bearing means rotatably engaging said rotor shaft; and (d) said retaining spring having a circular shape with an upturned lip, an end of said lip being seated in a notch on the sidewall of said rotor assembly central aperture.
Claim 6
Dependent Claim
28 words
The motor assembly of claim 3 in which said seating portion of said central aperture is a bevelled surface at one end of said rotor assembly central aperture.
Claim 7
Dependent Claim
27 words
The motor of claim 3 in which said seating portion of said central aperture is coined to a smooth annular radius in said rotor assembly central aperture.
Claim 8
Dependent Claim
41 words
The motor assembly of claim 1 in which a lubricating fluid seal is positioned adjacent one of said bearing means and comprises a magnetic circuit utilizing a ring magnet and said retaining spring to attract metal particles in a lubricating fluid.
Claim 9
Dependent Claim
31 words
The motor assembly of claim 1 in which a lubricating fluid seal comprising a circular and flexible member having a U-shaped cross section is positioned adjacent one of said bearing means.
Claim 10
Dependent Claim
56 words
The motor assembly of claim 1 in which a fan hub is attached to said rotor assembly, said hub having a thrust bearing portion in abutment with an end portion of said rotor shaft, a locking ring also being provided on said rotor shaft between said rotor shaft end portion and one of said bearing means.
Claim 11
Dependent Claim
47 words
The motor assembly of claim 1 in which a fan hub is attached to said rotor assembly, said rotor shaft having a top portion having a thrust bearing surface and a ledge, said hub abutting said thrust bearing surface and having hook means for engaging said ledge.
Claim 12
Dependent Claim
25 words
The motor assembly of claim 1 in which a belt drive member is slidably engaged on said rotor shaft and fastened to said rotor assembly.
Claim 13
Dependent Claim
30 words
The motor assembly of claim 1 in which shading coils are provided on said stator assembly comprising die cast aluminum strips formed in gaps adjacent the stator air gap aperture.
Claim 14
Dependent Claim
39 words
The motor of claim 1 in which said retaining spring has a circular shape with an upturned lip, an end of said lip being secured by staking an end portion of said rotor over the end of said lip.
Claim 15
Dependent Claim
135 words
An electric motor assembly comprising: (a) a stator assembly having a stator winding, an adjacent air gap aperture, and a support member on said stator assembly at one end of said air gap aperture; (b) a rotor shaft non-rotatably mounted to said support member and aligned in said air gap aperture; (c) a rotor assembly having end ring portions with a lamination portion therebetween, a central aperture, first and second bearing means positioned in said central aperture, each bearing means being seated at one end against a circular seating portion at an end of said lamination portion and retained at the other end by a circular retaining spring having a circular lip portion engaged in a notch of one of said end ring portions, said first and second bearing means rotatably engaging said rotor shaft.
Claim 16
Dependent Claim
135 words
An electric motor assembly comprising: (a) a stator assembly having a stator winding, an adjacent air gap aperture, and a support member on said stator assembly at one end of said air gap aperture; (b) a rotor shaft non-rotatably mounted to said support member and aligned in said air gap aperture; (c) a rotor assembly having end ring portions with a lamination portion therebetween, a central aperture, first and second bearing means positioned in said central aperture, each bearing means being seated at one end against a circular seating portion at an end of said lamination portion and retained at the other end by a circular retaining spring having a circular lip portion engaged in a notch of one of said end ring portions, said first and second bearing means rotatably engaging said rotor shaft.
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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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |