US4728835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motors
Assignee: Johnson Electric SA
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Filing: 1986-09-30
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Granted: 1988-03-01
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Expires: 2006-09-30
Abstract
Abstract A direct current electric motor comprises a cylindrical casing of electrically conductive material, a stator magnet or magnets and a wound rotor, provided with a commutator, accommodated in the casing, an end cap in one end of the casing, and brush holding devices supported by the end cap. The brush holding devices have terminals which extend through the end cap for connection to an electric supply. A recess is provided in the end cap so as to extend between one of the terminals and the casing and a portion of the casing has been deformed so as to extend into the recess and make electrical contact with the one terminal.
Inventors
- 👤 Roger F. Baines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:04
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/22; H02K5/225; H02K11/00; H02K11/40; H02K5/14; H02K5/143; H02K5/145
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A direct current electric motor comprising a cylindrical casing (10) of electrically conductive material, a stator magnet means (12, 13) and a wound rotor (14), provided with a commuator (15), accommodated in the casing, an end cap (11) in one end of the casing, and brush holding device (18, 19) supported by the end cap in electrically non-conductive relationship therewith, the brush holding devices having terminals (20, 21) which extend through the end cap for connection to an electric supply, wherein the casing has a deformed portion in contact with one of said terminals (20) to provide electrical connection between the casing and said one of the terminals.
Claim 2
Dependent Claim
108 words
A direct current electric motor comprising a cylindrical casing (10) of electrically conductive material, a stator magnet means (12, 13) and a wound rotor (14), provided with a commuator (15), accommodated in the casing, an end cap (11) in one end of the casing, and brush holding device (18, 19) supported by the end cap in electrically non-conductive relationship therewith, the brush holding devices having terminals (20, 21) which extend through the end cap for connection to an electric supply, wherein the casing has a deformed portion in contact with one of said terminals (20) to provide electrical connection between the casing and said one of the terminals.
Claim 3
Dependent Claim
37 words
The motor of claim 1, wherein a recess is provided in the end cap so as to extend between said one terminal and the casing and wherein said deformed portion of the casing extends into said recess.
Claim 4
Dependent Claim
23 words
The motor of claim 1, wherein said one terminal has a resilient portion with which the deformed portion of the casing makes contact.
Claim 5
Dependent Claim
22 words
The motor of claim 3, wherein said resilient portion is partially cut and bent out of the plane of said one terminal.
Claim 6
Dependent Claim
16 words
The motor of claim 1, wherein the deformed portion of the casing is a finger portion.
Claim 7
Dependent Claim
32 words
The motor of claim 1, wherein said one terminal is coated with a tin/lead mixture whereby a gas-tight connection is made between the deformed portion of the casing and said one terminal.
References Cited (Backward Citations)
GB846196A
Cited
US3445692A
Cited
US3600615A
Cited
US4157483A
Cited
FR2404328A1
Cited
GB2013042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |