US5304884A — Molded armature

Claim 1

Independent Claim 118 words

A coreless armature which is formed by placing coils with a given phase in at least two layers along a circumference and molding the coils with resin into a cylindrical shape and defining a pole pitch, wherein each coil has coil pieces defining an internal space therebetween and a coil pitch in each of said layers of no greater than 125% of the pole pitch, wherein the coils of each layer have a gap between the coil pieces thereof wherein the gap is placed so as to oppose the internal space of each of the coils in an adjacent layer and each of the coil pieces overlap a coil piece and an internal space of each adjacent layer.

Claim 2

Dependent Claim 118 words

A coreless armature which is formed by placing coils with a given phase in at least two layers along a circumference and molding the coils with resin into a cylindrical shape and defining a pole pitch, wherein each coil has coil pieces defining an internal space therebetween and a coil pitch in each of said layers of no greater than 125% of the pole pitch, wherein the coils of each layer have a gap between the coil pieces thereof wherein the gap is placed so as to oppose the internal space of each of the coils in an adjacent layer and each of the coil pieces overlap a coil piece and an internal space of each adjacent layer.

Claim 3

Dependent Claim 24 words

A coreless armature according to claim 1, wherein each coil in each layer has a rectangular shape bent along the circumference of a cylinder.

Claim 4

Dependent Claim 69 words

An armature for a revolving electric device comprising: a plurality of armature windings having terminals and molded in a molding resin material to form a cylindrical shape, means defining a groove adjacent one end of the armature, the groove having a plan cross section of a waveform, and wherein the terminals of said armature windings extend outwardly from the groove to protect the terminals during assembly of the device.

Claim 5

Dependent Claim 69 words

An armature for a revolving electric device comprising: a plurality of armature windings having terminals and molded in a molding resin material to form a cylindrical shape, means defining a groove adjacent one end of the armature, the groove having a plan cross section of a waveform, and wherein the terminals of said armature windings extend outwardly from the groove to protect the terminals during assembly of the device.

Claim 6

Dependent Claim 30 words

An armature for a revolving electric device according to claim 3, wherein said groove is ring shaped and intersects at a right angle to an axial direction of said armature.

Claim 7

Dependent Claim 51 words

An armature for a revolving electric device comprising a plurality of armature windings molded in a molding resin material to form a cylindrical shape, said armature having a bore portion with a resin film outwardly inclined from an intermediate portion of a bore surface of said armature toward both ends thereof.

Claim 8

Dependent Claim 51 words

An armature for a revolving electric device comprising a plurality of armature windings molded in a molding resin material to form a cylindrical shape, said armature having a bore portion with a resin film outwardly inclined from an intermediate portion of a bore surface of said armature toward both ends thereof.

Claim 9

Dependent Claim 34 words

An armature for a revolving electric device according to claim 5, wherein the bore portion has a ring groove at a starting point of said inclined surface forming a core surface of said armature.

Claim 10

Dependent Claim 45 words

An armature for a revolving electric device according to claim 5, wherein the bore portion is formed in a mold having upper and lower portions and an abutting portion between the upper portion and the lower portion, the abutting portion comprising a heat resistant ring.

Claim 11

Dependent Claim 94 words

A coreless armature comprising: at least two layers of coils, each layer comprising a plurality of coils having a cylindrical segment shape to form a cylindrical shape having a given pole pitch, each coil having peripheral coil pieces defining an internal space therebetween and a coil pitch no greater than 125% of the pole pitch, and means disposing the coils with a gap between adjacent coil pieces, wherein the gaps oppose the internal spaces of coils of adjacent layers, and each of the coil pieces overlay coil pieces and internal spaces of adjacent layers.

Claim 12

Dependent Claim 94 words

A coreless armature comprising: at least two layers of coils, each layer comprising a plurality of coils having a cylindrical segment shape to form a cylindrical shape having a given pole pitch, each coil having peripheral coil pieces defining an internal space therebetween and a coil pitch no greater than 125% of the pole pitch, and means disposing the coils with a gap between adjacent coil pieces, wherein the gaps oppose the internal spaces of coils of adjacent layers, and each of the coil pieces overlay coil pieces and internal spaces of adjacent layers.

Claim 13

Dependent Claim 80 words

An armature for a rotatable electric device comprising: an integral cylindrical member having a cylindrical surface and a plurality of windings therein formed by molding the armature windings in a moldable resin material, the windings having free ends, and means forming a radial depression having a waveform plan cross section in the cylindrical surface through which the free ends of the windings extend to outside the member to protect the free ends of the windings during assembly of the device.

Claim 14

Dependent Claim 80 words

An armature for a rotatable electric device comprising: an integral cylindrical member having a cylindrical surface and a plurality of windings therein formed by molding the armature windings in a moldable resin material, the windings having free ends, and means forming a radial depression having a waveform plan cross section in the cylindrical surface through which the free ends of the windings extend to outside the member to protect the free ends of the windings during assembly of the device.

Claim 15

Dependent Claim 19 words

The armature according to claim 9, wherein the depression extends orthogonally to a longitudinal axis of the cylindrical member.

Claim 16

Dependent Claim 56 words

An armature for a rotatable electric device comprising: an internal cylindrical member having a cylindrical surface and a plurality of windings therein formed by molding the windings in a moldable resin material, and means forming an axial bore in the cylindrical surface and tapering inwardly from ends of the cylindrical member towards an intermediate portion thereof.

Claim 17

Dependent Claim 56 words

An armature for a rotatable electric device comprising: an internal cylindrical member having a cylindrical surface and a plurality of windings therein formed by molding the windings in a moldable resin material, and means forming an axial bore in the cylindrical surface and tapering inwardly from ends of the cylindrical member towards an intermediate portion thereof.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-04-18	1997-10-18	1998-04-19	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-04-18	2001-10-18	2002-04-19	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-04-18	2005-10-18	2006-04-19	$7700.00	Window Closed / Lapsed

Molded armature

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