US3707637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamoelectric machine with lint guard for terminals
Assignee: AO Smith Corp
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Filing: 1971-04-28
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Granted: 1972-12-26
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Expires: 1991-04-28
Abstract
Abstract A lint guard is provided that prevents dust and lint from entering a motor in such a quantity that a fire hazard may be created and yet the lint guard does not require an assembly operation after the complete wiring of the motor. The lint guard is a generally cup-like member that fits in the conduit box opening of the motor end bell with one or more openings to accommodate terminals extending from a terminal board mounted on the end bell. The lint guard is preferably molded from a fire retardant plastic material.
Inventors
- 👤 Thomas Charlton
- 👤 Kenneth L Cation
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:43
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/22; H02K5/225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A lint guard for a dynamoelectric machine conduit box opening comprising: a member having a general configuration of a shallow cup with a generally flat bottom portion and upstanding side portions, the member being a unitary member comprising a molded insulation material; the bottom portion having one or more openings therein adapted to accommodate terminal members, the bottom portion also having flexible edges adjacent said one or more openings; said side portions having a configuration to fit within a conduit box opening in an end bell of a dynamoelectric machine, said side portions also having flexible edges, remote from the bottom portion, extending outwardly from said side portions.
Claim 2
Dependent Claim
108 words
A lint guard for a dynamoelectric machine conduit box opening comprising: a member having a general configuration of a shallow cup with a generally flat bottom portion and upstanding side portions, the member being a unitary member comprising a molded insulation material; the bottom portion having one or more openings therein adapted to accommodate terminal members, the bottom portion also having flexible edges adjacent said one or more openings; said side portions having a configuration to fit within a conduit box opening in an end bell of a dynamoelectric machine, said side portions also having flexible edges, remote from the bottom portion, extending outwardly from said side portions.
Claim 3
Dependent Claim
24 words
The subject matter of claim 1 wherein: said member has means for securing said member in position in a dynamoelectric machine without requiring fasteners.
Claim 4
Dependent Claim
111 words
A dynamoelectric machine comprising: a generally cylindrical frame with an end bell secured at each end thereof; a terminal structure mounted on an inner surface of a first of said end bells, said first end bell having a conduit box opening therein facing a surface of said terminal structure from which terminal members project; a lint guard comprising a single member having a general configuration of a shallow cup with a relatively flat bottom portion and upstanding sides, the sides configured to fit within said conduit box opening, the bottom portion having one or more openings accommodating said terminal members to permit external electrical connection with said lint guard in place.
Claim 5
Dependent Claim
111 words
A dynamoelectric machine comprising: a generally cylindrical frame with an end bell secured at each end thereof; a terminal structure mounted on an inner surface of a first of said end bells, said first end bell having a conduit box opening therein facing a surface of said terminal structure from which terminal members project; a lint guard comprising a single member having a general configuration of a shallow cup with a relatively flat bottom portion and upstanding sides, the sides configured to fit within said conduit box opening, the bottom portion having one or more openings accommodating said terminal members to permit external electrical connection with said lint guard in place.
Claim 6
Dependent Claim
78 words
The subject matter of claim 3 wherein: said side portions have a flexible edge, remote from said bottom portion, extending outwardly from said side portions and bearing against an outer surface of said end bell; said side portions also have locking projections extending outwardly therefrom to secure said guard within said conduit box opening without fasteners; and said bottom portion has flexible edges adjacent said one or more openings and bearing against said surface of said terminal structure.
Claim 7
Dependent Claim
54 words
The subject matter of claim 3 wherein: said one or more openings in the bottom portion of said lint guard includes a window of dimensions to accommodate said terminal members and to expose a portion of said surface of said terminal structure to permit viewing any identifying marks thereon for the respective terminal members.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |