US5118260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scroll compressor protector
Assignee: Carrier Corp
•
Filing: 1991-05-15
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Granted: 1992-06-02
•
Expires: 2011-05-15
Abstract
Abstract The motor protector for a motor is located so as to be responsive to the discharge temperature of a compressor. The protector is thereby responsive to motor current and compressor discharge temperature. Additionally, by conduction, the protector is responsive to the motor temperature. For scroll compressors, specifically, this provides protection from excess heating of the scroll wraps without requiring an additional sensor.
Inventors
- 👤 Howard H. Fraser, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:05
CPC Classifications
F; F04; F04C; F04C28/00; F04C28/28; F04C2270/00; F04C2270/19; F04C2270/70; F05; F05B; F05B2270/00; F05B2270/30; F05B2270/303; F05B2270/3032
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
140 words
A low side hermetic compressor means comprising: shell means; separating means coacting with said shell means to divide said shell means into a first and a second portion; said first portion containing running gear means and motor means for driving said running gear means whereby refrigerant gas is heated and pressurized and passes from said running gear means into said second portion via a discharge path; means for supplying electrical power through said shell means to said motor means; thermally responsive protector means responsive to an overcurrent in said motor means and located in said second portion in proximity with said discharge path and electrically connected to said motor means whereby said protector means is responsive to an overcurrent in said motor means as well as an overtemperature in said discharge path to cause said motor means to be disabled.
Claim 2
Dependent Claim
140 words
A low side hermetic compressor means comprising: shell means; separating means coacting with said shell means to divide said shell means into a first and a second portion; said first portion containing running gear means and motor means for driving said running gear means whereby refrigerant gas is heated and pressurized and passes from said running gear means into said second portion via a discharge path; means for supplying electrical power through said shell means to said motor means; thermally responsive protector means responsive to an overcurrent in said motor means and located in said second portion in proximity with said discharge path and electrically connected to said motor means whereby said protector means is responsive to an overcurrent in said motor means as well as an overtemperature in said discharge path to cause said motor means to be disabled.
Claim 3
Dependent Claim
14 words
The compressor means of claim 1 wherein said compressor means is a scroll compressor.
Claim 4
Dependent Claim
34 words
The compressor means of claim 1 further including means for conducting heat from said motor means to said protector means whereby said protector means is additionally responsive to an overheating of said motor means.
References Cited (Backward Citations)
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Cited
US2811019A
Cited
US2946203A
Cited
US3278111A
Cited
US3874187A
Cited
US4820130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-02 | 1995-12-02 | 1996-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-02 | 1999-12-02 | 2000-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-02 | 2003-12-02 | 2004-06-02 | $7700.00 | Window Closed / Lapsed |