Patent US3872334A successfully refreshed from Google Patents.
US3872334A
Expired / Lapsed
US
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Integral rotor and gear assembly
Assignee: Individual
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Filing: 1974-04-18
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Granted: 1975-03-18
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Expires: 1994-04-18
Abstract
Abstract An integral rotor assembly for a dynamoelectric machine fabricated of a mixture of thermoplastic powder and barium ferrite particles in such proportion that the finished assembly has predetermined physical and magnetic strengths. Typically, a gear is molded as an integral part of a magnetic rotor permanently magnetized. The gear is for the purpose of transmitting motive force. Such an assembly is molded as a single part containing orientable, permanently magnetizable particles, such as barium ferrite, in a thermoplastic matrix. The magnetic particles are oriented to maximize magnetic strength and there is sufficient plastic material to provide the necessary structural strength in the gear.
Inventors
- 👤 Robert J Loubier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:01
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/16; B; B29; B29C; B29C70/00; B29C70/58; B29C70/62; B29D; B29D15/00; G04D; G04D3/00; G04D3/0002; G04D3/0017; H; H01; H01F; H01F13/00; H01F13/003; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/2726; H02K15/00; H02K15/02; H02K15/03; H02K7/00; H02K7/14; B29C45/00; B29K; B29K2077/00; B29L; B29L2031/00; B29L2031/748; B29L2031/7498; Y; Y10; Y10S; Y10S264/00; Y10S264/58
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
156 words
For use in a dynamoelectric machine, an integral rotor assembly comprising a permanently magnetized rotor and a forcetransmitting element formed of the same material, said material including a solidified mixture of thermoplastic and magnetic particles capable of being permanently magnetized, said magnetic particles in said rotor being oriented according to a predetermined magnetic field pattern, said thermoplastic serving as a holding matrix for said particles and also providing structural strength for said assembly, said particles being homogeneously distributed throughout said assembly except as modified by said orientation, the quantity of said particles in said assembly being sufficient to provide said rotor with a predetermined magnetic strength with said particles oriented as aforesaid, and the quantity of said thermoplastic in said assembly being sufficient to provide a predetermined structural strength for said assembly, said structural strength being of a magnitude as provides for the transmission of motive force by said force-transmitting element to or from said rotor.
Claim 2
Dependent Claim
156 words
For use in a dynamoelectric machine, an integral rotor assembly comprising a permanently magnetized rotor and a forcetransmitting element formed of the same material, said material including a solidified mixture of thermoplastic and magnetic particles capable of being permanently magnetized, said magnetic particles in said rotor being oriented according to a predetermined magnetic field pattern, said thermoplastic serving as a holding matrix for said particles and also providing structural strength for said assembly, said particles being homogeneously distributed throughout said assembly except as modified by said orientation, the quantity of said particles in said assembly being sufficient to provide said rotor with a predetermined magnetic strength with said particles oriented as aforesaid, and the quantity of said thermoplastic in said assembly being sufficient to provide a predetermined structural strength for said assembly, said structural strength being of a magnitude as provides for the transmission of motive force by said force-transmitting element to or from said rotor.
Claim 3
Dependent Claim
36 words
The integral assembly of claim 1 in which said rotor has an annular peripheral portion containing said oriented particles, a coaxial shaft portion integrally joined to said annular portion, said force-transmitting element including said shaft portion.
Claim 4
Dependent Claim
30 words
The assembly of claim 2 in which said peripheral portion is cylindrically shaped, said oriented particles being disposed between the peripheral surface thereof and the central portion of said assembly.
Claim 5
Dependent Claim
57 words
The rotor assembly of claim 3 in which said peripheral portion has concentric inner and outer cylindrical surfaces spaced radially outwardly from said shaft portion, said oriented particles being disposed between said surfaces, a supporting disc portion integrally joining said shaft portion to said peripheral portion, and a coaxial spur gear integrally joined to said shaft portion.
Claim 6
Dependent Claim
19 words
The rotor assembly of claim 4 in which said shaft portion has a coaxial bore, said thermoplastic being lubricous.
Claim 7
Dependent Claim
19 words
The rotor assembly of claim 5 in which said thermoplastic includes nylon and said particles include barium ferrite particles.
Claim 8
Dependent Claim
26 words
The rotor assembly of claim 4 in which the magnetic particles in said peripheral portion are oriented and the particles in said gear are not oriented.
Claim 9
Dependent Claim
128 words
For use in a dynamoelectric machine, an integral rotor assemblly comprising a permanently magnetized rotor and force-transmitting element formed of the same material, said material including a solidified mixture of thermoplastic and magnetic particles capable of being permanently magnetized, said thermoplastic serving as a holding matrix for said particles and also providing structural strength for said assembly, said particles being homogeneously distributed throughout said assembly, the quantity of said particles in said assembly being sufficient to provide said rotor with a predetermined magnetic strength, and the quantity of said thermoplastic in said assembly being sufficient to provide a predetermined structural strength for said assembly, said structural strength being of a magnitude as provides for the transmission of motive force by said force-transmitting elements to or from said rotor.
Claim 10
Dependent Claim
128 words
For use in a dynamoelectric machine, an integral rotor assemblly comprising a permanently magnetized rotor and force-transmitting element formed of the same material, said material including a solidified mixture of thermoplastic and magnetic particles capable of being permanently magnetized, said thermoplastic serving as a holding matrix for said particles and also providing structural strength for said assembly, said particles being homogeneously distributed throughout said assembly, the quantity of said particles in said assembly being sufficient to provide said rotor with a predetermined magnetic strength, and the quantity of said thermoplastic in said assembly being sufficient to provide a predetermined structural strength for said assembly, said structural strength being of a magnitude as provides for the transmission of motive force by said force-transmitting elements to or from said rotor.
Claim 11
Dependent Claim
98 words
The assembly of claim 8 in which said rotor has an annular peripheral portion containing said particles, said peripheral portion having concentric inner and outer cylindrical surfaces, a radially disposed supporting disc portion integrally joined to said peripheral portion, said disc portion having a thickness less than the axial dimension and offset toward one side of said peripheral portion, a cylindrical hub portion coaxially projecting from one side of said disc portion, and a spur gear of smaller diameter coaxially projecting from said hub portion, said disc portion, said hub portion and said gear also containing said particles.
Claim 12
Dependent Claim
36 words
The assembly of claim 8 in which said thermo-plastic is a lubricous material, said disc portion, said hub portion and said gear having a coaxial bore therethrough adapted to serve as a journal for a 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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |