US4020647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination of capacitor in refrigerant system
Assignee: Sprague Electric Co
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Filing: 1975-11-07
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Granted: 1977-05-03
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Expires: 1995-11-07
Abstract
Abstract An uncased polypropylene capacitor is located within a sealed refrigeration system so as to be impregnated with the halocarbon refrigerant employed in the system.
Inventors
- 👤 George A. Shirn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:53
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/04; H02K17/08; F; F25; F25B; F25B31/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
The combination within a sealed enclosure of a refrigeration system containing a halocarbon fluid of a motor and an uncased capacitor section containing a polypropylene spacer material, said section positioned in the halocarbon fluid within the system and being impregnated with the halocarbon fluid whereby the halocarbon fluid and the polypropylene spacer provide the dielectric for the capacitor section, and an electrical connection of the capacitor section to the motor being contained entirely within the sealed enclosure of the refrigeration system.
Claim 2
Dependent Claim
81 words
The combination within a sealed enclosure of a refrigeration system containing a halocarbon fluid of a motor and an uncased capacitor section containing a polypropylene spacer material, said section positioned in the halocarbon fluid within the system and being impregnated with the halocarbon fluid whereby the halocarbon fluid and the polypropylene spacer provide the dielectric for the capacitor section, and an electrical connection of the capacitor section to the motor being contained entirely within the sealed enclosure of the refrigeration system.
Claim 3
Dependent Claim
24 words
The combination as claimed in claim 1 wherein the capacitor section is positioned in and impregnated by said halocarbon fluid in the gaseous phase.
Claim 4
Dependent Claim
24 words
The combination as claimed in claim 1 wherein the capacitor section is positioned in and impregnated by said halocarbon fluid in the liquid phase.
Claim 5
Dependent Claim
32 words
The combination as claimed in claim 1 wherein the halocarbon fluid is selected from the group consisting of CHC1F 2 , C 2 F 6 , and CC1 2 F 2 .
Claim 6
Dependent Claim
24 words
The combination as claimed in claim 1 wherein a sole opening in the sealed enclosure contains solely an electrical feedthrough for the electric motor.
Claim 7
Dependent Claim
32 words
The combination as claimed in claim 1 wherein the capacitor section is comprised of metallized polypropylene having polypropylene layers in a thickness range of from about 0.25 mil to about 0.5 mil.
Claim 8
Dependent Claim
101 words
In combination an enclosed refrigeration system having a one piece chamber within the system, and in said chamber a pump for circulating a halocarbon fluid in the system, a motor associated with the refrigeration system for driving the pump, an uncased capacitor body containing a polypropylene spacer material for the motor mounted within the refrigeration system adjacent the motor and in the halocarbon fluid in the chamber so that the fluid is impregnated into the capacitor body whereby the halocarbon fluid and the polypropylene spacer provide the dielectric for the capacitor body and the breakdown voltage of the capacitor is improved.
Claim 9
Dependent Claim
101 words
In combination an enclosed refrigeration system having a one piece chamber within the system, and in said chamber a pump for circulating a halocarbon fluid in the system, a motor associated with the refrigeration system for driving the pump, an uncased capacitor body containing a polypropylene spacer material for the motor mounted within the refrigeration system adjacent the motor and in the halocarbon fluid in the chamber so that the fluid is impregnated into the capacitor body whereby the halocarbon fluid and the polypropylene spacer provide the dielectric for the capacitor body and the breakdown voltage of the capacitor is improved.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |