US3855489A — Dynamoelectric machine having improved lint guard…

Claim 1

Independent Claim 197 words

A dynamoelectric machine adapted for operation in an atmosphere having foreign particles therein comprising a stator with a bore therein, at least one end frame having a chamber for lubricant therein, a rotor mounted for rotation within the bore and adapted to be axially movable within predetermined limits, a bearing in the end frame for lubricating communication with the chamber, an aperture in the end frame connected between the chamber and the atmosphere, a shaft extending through the aperture into the chamber and received by the bearing and the shaft also being secured to the rotor for conjoint movement therewith, a generally annular lint guard secured to the shaft and disposed in close spaced relation with a portion of the end frame about the aperture, a narrow generally annular gap between the lint guard and the portion of the end frame about the aperture for preventing entry into the chamber of foreign particles which may accumulate along the shaft adjacent the aperture, and at least one of the end frame portion and the lint guard being generally axially overlapping wiith the other thereof a distance at least great enough to accommodate the axial movement of the rotor.

Claim 2

Dependent Claim 197 words

A dynamoelectric machine adapted for operation in an atmosphere having foreign particles therein comprising a stator with a bore therein, at least one end frame having a chamber for lubricant therein, a rotor mounted for rotation within the bore and adapted to be axially movable within predetermined limits, a bearing in the end frame for lubricating communication with the chamber, an aperture in the end frame connected between the chamber and the atmosphere, a shaft extending through the aperture into the chamber and received by the bearing and the shaft also being secured to the rotor for conjoint movement therewith, a generally annular lint guard secured to the shaft and disposed in close spaced relation with a portion of the end frame about the aperture, a narrow generally annular gap between the lint guard and the portion of the end frame about the aperture for preventing entry into the chamber of foreign particles which may accumulate along the shaft adjacent the aperture, and at least one of the end frame portion and the lint guard being generally axially overlapping wiith the other thereof a distance at least great enough to accommodate the axial movement of the rotor.

Claim 3

Dependent Claim 46 words

A dynamoelectric machine in accordance with claim 1 wherein said annular lint guard comprises an annular first leg member secured to said shaft and an annular second leg member extending outwardly from said first leg member toward a portion of the end cap defining the aperture.

Claim 4

Dependent Claim 23 words

A dynamoelectric machine in accordance with claim 2 wherein said second leg member extends outwardly from an end of said first leg member.

Claim 5

Dependent Claim 33 words

A dynamoelectric machine in accordance with claim 3 wherein said lint guard further comprises an annular third leg member secured to said second leg member generally, coaxially of, said annular first leg member.

Claim 6

Dependent Claim 24 words

A dynamoelectric machine in accordance with claim 4 wherein said annular third leg member is disposed generally radially of said annular first leg member.

Claim 7

Dependent Claim 124 words

A dynamoelectric machine in accordance with claim 1, further comprising another aperture in the end frame connected between the chamber and the atmosphere through which the shaft extends, another generally annular lint guard secured to the shaft and disposed in close spaced reLation with another portion of the end frame about the other aperture, another generally annular gap between the other lint guard and the other portion of the end frame about the other aperture for preventing entry into the chamber of the foreign particles which may accumulate along the shaft adjacent the other aperture, and at least one of the other portion of the end frame and the other lint guard being generally axially overlapping to accommodate the axial movement of the rotor.

Claim 8

Dependent Claim 190 words

A dynamoelectric machine adapted for operation in an atmosphere having foreign particles therein comprising a stator having a magnetic core with a bore therein, at least one end frame, and a bearing housing carried by said end frame and having a chamber for lubricant therein, a rotor mounted for rotation within the bore of said magnetic core, a sleeve bearing supported within said bearing housing for lubricant communication with the chamber, an end cap secured to said bearing housing for at least partially closing the chamber and having an aperture communicating between the chamber and the atmosphere, a shaft secured to said rotor and journalled by the sleeve bearing and extending through the chamber and the end cap aperture with said shaft and rotor being axially movable a predetermined distance, and an annular lint guard secured to said shaft including a first annular collar press-fitted to said shaft, a second annular collar disposed coaxially about said first annular collar and extending through said end cap aperture coaxially of said shaft a distance greater than said predetermined distance, and a transverse member structurally linking said second collar with said first collar.

Claim 9

Dependent Claim 190 words

A dynamoelectric machine adapted for operation in an atmosphere having foreign particles therein comprising a stator having a magnetic core with a bore therein, at least one end frame, and a bearing housing carried by said end frame and having a chamber for lubricant therein, a rotor mounted for rotation within the bore of said magnetic core, a sleeve bearing supported within said bearing housing for lubricant communication with the chamber, an end cap secured to said bearing housing for at least partially closing the chamber and having an aperture communicating between the chamber and the atmosphere, a shaft secured to said rotor and journalled by the sleeve bearing and extending through the chamber and the end cap aperture with said shaft and rotor being axially movable a predetermined distance, and an annular lint guard secured to said shaft including a first annular collar press-fitted to said shaft, a second annular collar disposed coaxially about said first annular collar and extending through said end cap aperture coaxially of said shaft a distance greater than said predetermined distance, and a transverse member structurally linking said second collar with said first collar.

Claim 10

Dependent Claim 159 words

A dynamoelectric machine adapted for operation in an atmosphere having foreign particles therein comprising at least one end frame, a bearing housing carried by said end frame, a chamber for lubricant in the bearing housing, a bearing in the bearing housing and communicating with the chamber, a shaft journalled through said bearing and extending through the chamber with said shaft being axially movable a predetermined distance relative to the end frame, an end cap secured to said bearing housing and having a flange defining an aperture about the shaft communicating the chamber with the atmosphere, the flange extending coaxially of the shaft a distance greater than the predetermined distance, and an annular lint guard secured to said shaft for axial movement therewith through the predetermined distance within said end cap flange, the lint guard blocking the foreign particles which may accumulate along the shaft from ingress through the aperture into the chamber into wicking engagement with the lubricant therein.

Claim 11

Dependent Claim 159 words

A dynamoelectric machine adapted for operation in an atmosphere having foreign particles therein comprising at least one end frame, a bearing housing carried by said end frame, a chamber for lubricant in the bearing housing, a bearing in the bearing housing and communicating with the chamber, a shaft journalled through said bearing and extending through the chamber with said shaft being axially movable a predetermined distance relative to the end frame, an end cap secured to said bearing housing and having a flange defining an aperture about the shaft communicating the chamber with the atmosphere, the flange extending coaxially of the shaft a distance greater than the predetermined distance, and an annular lint guard secured to said shaft for axial movement therewith through the predetermined distance within said end cap flange, the lint guard blocking the foreign particles which may accumulate along the shaft from ingress through the aperture into the chamber into wicking engagement with the lubricant therein.

Claim 12

Dependent Claim 157 words

In a dynamoelectric machine adapted for operation in an atmosphere having foreign particles therein, a chamber for lubricant disposed in a portion of the dynamoelectric mchine, an opening in the dynamoelectric machine portion communicating between the chamber and the atmosphere, a rotatable member axially movable in the dynamoelectric machine within predetermined limits extending into the chamber and through the opening; means disposed about the rotatable member and extending into close spaced relation with the dynamoelectric machine portion about the opening to form a predeterminately narrow gap therebetween for preventing the foreign particles which may accumulate along the rotatable member from entry through the opening into the chamber into wicking engagement with the lubricant therein, and at least one of the preventing means and the dynamoelectric machine portion about the opening being generally axially overlapped with the other thereof a distance at least great enough to accommodate the axial movement of the rotatable member while maintaining the gap.

Claim 13

Dependent Claim 157 words

In a dynamoelectric machine adapted for operation in an atmosphere having foreign particles therein, a chamber for lubricant disposed in a portion of the dynamoelectric mchine, an opening in the dynamoelectric machine portion communicating between the chamber and the atmosphere, a rotatable member axially movable in the dynamoelectric machine within predetermined limits extending into the chamber and through the opening; means disposed about the rotatable member and extending into close spaced relation with the dynamoelectric machine portion about the opening to form a predeterminately narrow gap therebetween for preventing the foreign particles which may accumulate along the rotatable member from entry through the opening into the chamber into wicking engagement with the lubricant therein, and at least one of the preventing means and the dynamoelectric machine portion about the opening being generally axially overlapped with the other thereof a distance at least great enough to accommodate the axial movement of the rotatable member while maintaining the gap.

Claim 14

Dependent Claim 27 words

In a dynamoelectric machine as set forth in claim 9, wherein one of the preventing means and the dynamoelectric portion about the opening comprise an annular flange.

Claim 15

Dependent Claim 45 words

In a dynamoelectric machine as set forth in claim 10, wherein the other of the preventing means and the dynamoelectric machine portion about the opening includes a peripheral portion disposed in the close spaced relation with the annular flange thereby to form the gap therebetween.

Claim 16

Dependent Claim 20 words

In a dynamoelectric machine as set forth in claim 11, wherein the annular flange extends generally inwardly toward the chamber.

Claim 17

Dependent Claim 29 words

In a dynamoelectric machine as set forth in claim 11, wherein the peripheral portion is another annular flange, the gap being between the first named and other annular flanges.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1977-12-16	1978-06-17	1978-12-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1981-12-16	1982-06-17	1982-12-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1985-12-16	1986-06-17	1986-12-17	$7700.00	Window Closed / Lapsed

Dynamoelectric machine having improved lint guard means

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