Patent US4503347A successfully refreshed from Google Patents.
US4503347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally protected dynamoelectric machine and method of assembly
Assignee: Copeland Corp LLC
•
Filing: 1982-03-22
•
Granted: 1985-03-05
•
Expires: 2002-03-22
Abstract
Abstract A hermetic motor-compressor has a motor cover or shroud overlying the end turns of the motor windings. The motor cover is secured to a fastening device in the form of a ring held in place by the stator fastening bolts. A molded plastic holder or retainer for a motor protector is fitted on a lug formed on the ring. The retainer is adapted to hold protectors of different physical configurations. The lug projects upwardly inside the cover and in one embodiment the retainer is trapped between and held in position by the ring and the cover. The protector is of the thermally responsive electrical cutout type and is maintained in closely overlying heat conductive relationship with respect to the end turns of the motor windings by the motor cover. The parts which hold the retainer and the protector in place are movable into their holding positions by the act of moving the cover down into position, in a direction generally parallel to the axis of the motor.
Inventors
- 👤 Ernest R. Bergman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:49
CPC Classifications
H; H02; H02K; H02K11/00; H02K11/20; H02K11/25
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
151 words
In a dynamoelectric machine having a rotor, and having a stator assembly including a field iron portion and a field winding portion at one end of the stator assembly, a generally belled cover overlying said field winding portion and secured to the field iron portion at said end of the stator assembly, the novelty which comprises a protector assembly including a holder and a thermally responsive protector retained by said holder, end and side abutment portions on the holder spaced from the protector and engageable by two different portions of the cover of the machine to maintain said protector in close proximity to the winding portion and block movement of the holder and protector away from the winding, said end abutment portion on the holder being engageable by an end portion of the cover and said side abutment portion on the holder engageable by a side abutment portion of the cover.
Claim 2
Dependent Claim
151 words
In a dynamoelectric machine having a rotor, and having a stator assembly including a field iron portion and a field winding portion at one end of the stator assembly, a generally belled cover overlying said field winding portion and secured to the field iron portion at said end of the stator assembly, the novelty which comprises a protector assembly including a holder and a thermally responsive protector retained by said holder, end and side abutment portions on the holder spaced from the protector and engageable by two different portions of the cover of the machine to maintain said protector in close proximity to the winding portion and block movement of the holder and protector away from the winding, said end abutment portion on the holder being engageable by an end portion of the cover and said side abutment portion on the holder engageable by a side abutment portion of the cover.
Claim 3
Dependent Claim
126 words
A molded plastic holder for positioning a thermally responsive protector in close proximity to the projecting end turns of the field winding of a dynamoelectric machine of the type having end turns and having a cover over said end turns, said holder having a side portion, a protector holding portion extending substantially perpendicularly laterally in one direction from said side portion and adapted to closely overlie the end of the end turns, and a hook like part on and projecting laterally in the other direction from said side portion, said hook like part being adapted to be interlockingly engageable with an apertured area of said end cover of the machine to maintain the holder and the protector held thereby in close proximity to the end turns.
Claim 4
Dependent Claim
126 words
A molded plastic holder for positioning a thermally responsive protector in close proximity to the projecting end turns of the field winding of a dynamoelectric machine of the type having end turns and having a cover over said end turns, said holder having a side portion, a protector holding portion extending substantially perpendicularly laterally in one direction from said side portion and adapted to closely overlie the end of the end turns, and a hook like part on and projecting laterally in the other direction from said side portion, said hook like part being adapted to be interlockingly engageable with an apertured area of said end cover of the machine to maintain the holder and the protector held thereby in close proximity to the end turns.
Claim 5
Dependent Claim
27 words
A molded plastic holder as set forth in claim 2 wherein said holder further includes a relatively flat vertical leg adapted to extend beside said end turns.
Claim 6
Dependent Claim
37 words
A molded plastic holder as set forth in claim 3 wherein one end of said vertical leg is adapted to cooperate with means projecting from the end of said dynamoelectric machine to support said holder during assembly.
Claim 7
Dependent Claim
75 words
A molded plastic holder as set forth in claim 2 further comprising an end abutment portion carried by and projecting substantially vertically from said protector holding portion toward said end cover of the machine when said end cover and said holder are assembled to said machine to restrict movement of said holder and protector away from said end turns and thereby maintain the holder and the protector thereon in close proximity to the end turns.
Claim 8
Dependent Claim
117 words
A molded plastic holder for positioning a thermally responsive protector in close proximity to the projecting end turns of the field winding of a dynamoelectric machine, said holder having a side portion including a leg adapted to extend beside the end turns, a protector holding portion extending substantially transversely from the leg, and adapted to closely overlie the ends of the end turns, and a fastening portion on said leg adapted for engagement with a coacting fastening portion carried by the stator to position the holder, a generally annular fastening member adapted to be secured to the stator for securing a cover thereto, said coacting fastening portion for positioning the holder being carried by said fastening member.
Claim 9
Dependent Claim
117 words
A molded plastic holder for positioning a thermally responsive protector in close proximity to the projecting end turns of the field winding of a dynamoelectric machine, said holder having a side portion including a leg adapted to extend beside the end turns, a protector holding portion extending substantially transversely from the leg, and adapted to closely overlie the ends of the end turns, and a fastening portion on said leg adapted for engagement with a coacting fastening portion carried by the stator to position the holder, a generally annular fastening member adapted to be secured to the stator for securing a cover thereto, said coacting fastening portion for positioning the holder being carried by said fastening member.
Claim 10
Dependent Claim
146 words
Overload protection means for a dynamoelectric machine of the type having a rotor, a stator spacedly encircling the rotor, said stator comprising a core and a winding projecting from the core at one end of the machine, a generally belled cover securable to the stator in spacedly overlying relation to the winding at said end of the machine, and a thermally responsive protector unit, characterized by means restrainable and closely overengageable by the cover for maintaining said protector unit in close proximity to said projecting portion of the winding, said last named means comprising a retainer adapted to hold a thermally responsive protector unit, said cover having an abutment portion movable to and from a closely overengaging and restraining position with respect to the retainer during movement of the cover toward and from the end turns in a path parallel to the axis of the rotor.
Claim 11
Dependent Claim
146 words
Overload protection means for a dynamoelectric machine of the type having a rotor, a stator spacedly encircling the rotor, said stator comprising a core and a winding projecting from the core at one end of the machine, a generally belled cover securable to the stator in spacedly overlying relation to the winding at said end of the machine, and a thermally responsive protector unit, characterized by means restrainable and closely overengageable by the cover for maintaining said protector unit in close proximity to said projecting portion of the winding, said last named means comprising a retainer adapted to hold a thermally responsive protector unit, said cover having an abutment portion movable to and from a closely overengaging and restraining position with respect to the retainer during movement of the cover toward and from the end turns in a path parallel to the axis of the rotor.
Claim 12
Dependent Claim
150 words
Overload protection means for a dynamoelectric machine of the type having a rotor, a stator spacedly encircling the rotor, said stator comprising a core and a winding projecting from the core at one end of the machine, a generally belled cover securable to the stator in spacedly overlying relation to the winding at said end of the machine, and a thermally responsive protector unit, characterized by means restrainable and closely overengageable by the cover for maintaining said protector unit in close proximity to said projecting portion of the winding, a frame, means including a plurality of screw fasteners for securing the stator to the frame, latchtype cover holding means secured to the stator by said screw fasteners, and coacting latch portions on said cover latchably interengageable with said cover holding means axial movement of the cover to overlying and overengaging relation with respect to said winding and cover holding means.
Claim 13
Dependent Claim
150 words
Overload protection means for a dynamoelectric machine of the type having a rotor, a stator spacedly encircling the rotor, said stator comprising a core and a winding projecting from the core at one end of the machine, a generally belled cover securable to the stator in spacedly overlying relation to the winding at said end of the machine, and a thermally responsive protector unit, characterized by means restrainable and closely overengageable by the cover for maintaining said protector unit in close proximity to said projecting portion of the winding, a frame, means including a plurality of screw fasteners for securing the stator to the frame, latchtype cover holding means secured to the stator by said screw fasteners, and coacting latch portions on said cover latchably interengageable with said cover holding means axial movement of the cover to overlying and overengaging relation with respect to said winding and cover holding means.
Claim 14
Dependent Claim
150 words
In a dynamoelectric machine including a rotor, a stator including a field iron assembly extending around the rotor, said stator also including a field winding end turn portion of generally annular form and of lesser diameter than the field iron assembly, said end turn portion projecting from the field iron assembly at one end of the stator, an end cover, means including a fastening ring attached to the field iron assembly for securing the cover to said end of the stator in overlying relation to said end turn portion, and a protector assembly including a holder and a thermally responsive protector secured in the holder, characterized by means for securing said holder in a position to maintain the protector in close proximity to the end turn portion including interengageable portions on said holder and ring, interengageable portions on said holder and cover, and intersecured portions on said ring and cover.
Claim 15
Dependent Claim
150 words
In a dynamoelectric machine including a rotor, a stator including a field iron assembly extending around the rotor, said stator also including a field winding end turn portion of generally annular form and of lesser diameter than the field iron assembly, said end turn portion projecting from the field iron assembly at one end of the stator, an end cover, means including a fastening ring attached to the field iron assembly for securing the cover to said end of the stator in overlying relation to said end turn portion, and a protector assembly including a holder and a thermally responsive protector secured in the holder, characterized by means for securing said holder in a position to maintain the protector in close proximity to the end turn portion including interengageable portions on said holder and ring, interengageable portions on said holder and cover, and intersecured portions on said ring and cover.
Claim 16
Dependent Claim
40 words
Means as defined in claim 9 including a tongue upstanding from said ring, said holder having a part interfitted with said tongue, and abutment portions on the cover and holder engageable to maintain interfitted engagement of the tongue and holder.
Claim 17
Dependent Claim
55 words
Means as defined in claim 10 wherein the cover is secured by an outer portion of the ring and the tongue projects inside the cover in a direction parallel to the axis of the rotor, said abutment portions being spaced laterally outwardly from the tongue and opposing each other in directions parallel to said axis.
Claim 18
Dependent Claim
31 words
Means as defined in claim 9 wherein said means for securing the cover includes latchable holding portions on the ring and cover engageable by moving the cover axially toward the stator.
Claim 19
Dependent Claim
154 words
A molded plastic holder for positioning a thermally responsive protector in close proximity to the projecting end turns of the field winding of a dynamoelectric machine of the type having end turns and having a cover over said end turns, said holder having a side portion, a protector holding portion extending substantially perpendicularly laterally in one direction from said side portion and adapted to closely overlie the ends of the end turns, and a side abutment portion on and projecting laterally in the other direction from said side portion, said abutment portion having a neck and a head portion, said head portion being adapted to pass through a first portion of a slot in said cover and said neck portion being adapted to be received in a narrower restraining portion of said slot an end of said narrower slot portion abuts said neck portion and said head portion overlies the outside of said cover.
Claim 20
Dependent Claim
154 words
A molded plastic holder for positioning a thermally responsive protector in close proximity to the projecting end turns of the field winding of a dynamoelectric machine of the type having end turns and having a cover over said end turns, said holder having a side portion, a protector holding portion extending substantially perpendicularly laterally in one direction from said side portion and adapted to closely overlie the ends of the end turns, and a side abutment portion on and projecting laterally in the other direction from said side portion, said abutment portion having a neck and a head portion, said head portion being adapted to pass through a first portion of a slot in said cover and said neck portion being adapted to be received in a narrower restraining portion of said slot an end of said narrower slot portion abuts said neck portion and said head portion overlies the outside of said cover.
References Cited (Backward Citations)
US2682005A
Cited
US3010401A
Cited
US3183383A
Cited
US3222555A
Cited
US3351790A
Cited
US3319096A
Cited
US3875439A
Cited
US4004169A
Cited
US4292555A
Cited
US4061935A
Cited
US4181393A
Cited
US4236092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |