US4783608A Expired / Lapsed US ⏱️ 0.0 years remaining

Electric motor with an improved bearing

Assignee: ETUDES TECHNIQUES ET REPRESENTATIONS INDUSTRIELLES ETRL

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Filing: 1987-06-25

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Granted: 1988-11-08

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Expires: 2007-06-25

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Abstract

Abstract An electric motor provided with a bearing of improved design has a stator (1) supported by a mounting frame (3) and a rotor (4) in rigidly fixed relation to a shaft (5), the shaft being rotatably mounted in a plain bearing (7) placed within a tubular support (8) which is rigidly fixed to the motor frame (3). A sleeve (23) composed of material having a sufficient degree of elastic deformability to absorb vibrations is interposed between the outer face (24) of the bearing (7) and the inner face of the tubular support (8). The electric motor is intended in particular to equip propeller-type fans and is primarily applicable to direct-current motors of the electronic commutation type.

Inventors

👤 Francois Gruber
👤 Andre Renaud

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-27 05:33

CPC Classifications

H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1675; F; F16; F16C; F16C27/00; F16C27/06; F16C27/063; F16C2380/00; F16C2380/26

Claims Analysis

Total Claims: 6

Claim 1

Independent Claim 101 words

An electric motor, having a stator (1) supported by a mounting frame (3) and a rotor (4) rigidly secured to a shaft (5) which is rotatably mounted within a plain bearing (7), said plain bearing being disposed within a tubular support (8) which is rigidly fixed to said stator (1), and a sleeve (23) composed of material having a sufficient degree of elastic deformability to absorb vibrations interposed between the outer face (24) of the bearing (7) and the inner face (19) of said tubular support (8), the outer face (40) of said sleeve (23) having longitudinal splines (27, 28) thereon.

Claim 2

Dependent Claim 101 words

Claim 3

Dependent Claim 17 words

An electric motor according to claim 1, wherein alternate said splines (27, 28) are of rectangular cross-section.

Claim 4

Dependent Claim 78 words

An electric motor according to claim 1, wherein the height of the splines (27 ,28) in regions adjacent to the ends of the sleeve (23) is such that said splines are in contact with the inner face (19) of the tubular support (8) only opposite to said regions so as to provide an annular gap (29) between the sleeve (23) and the inner face (19) of the tubular support (8) in a central region located between said regions.

Claim 5

Dependent Claim 59 words

An electric motor according to claim 2, wherein the splines (27) of rectangular cross-section are provided at each end portion thereof (27a, 27b) with an extension in the form of a hook (32) which bears on an annular shoulder (21) of the tubular support (8) so that the sleeve (23) is thus rigidly fixed to said tubular support (8).

Claim 6

Dependent Claim 27 words

An electric motor according to claim 1, wherein the sleeve (23) is formed by two sleeve elements (25) joined together by means of bendable coupling straps (26).

References Cited (Backward Citations)

US2427947A Cited

GB995534A Cited

FR1399839A Cited

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FR2350721A1 Cited

JPS5388903A Cited

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JPS5523710A Cited

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EP0149228A2 Cited

FR2559319A1 Cited

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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)	1991-11-08	1992-05-09	1992-11-08	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1995-11-08	1996-05-09	1996-11-08	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1999-11-08	2000-05-09	2000-11-08	$7700.00	Window Closed / Lapsed

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