US3792755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of suppressing noise in hermetic compressors
Assignee: Tecumseh Products Co
•
Filing: 1973-03-26
•
Granted: 1974-02-19
•
Expires: 1993-03-26
Abstract
Abstract The method of attenuating the noise produced by an operating hermetic compressor unit by adding a foaming agent to the lubricating oil of the unit and agitating the oil during operation of the unit.
Inventors
- 👤 K Sanvordenker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:59
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/06; F04C29/068; F04B; F04B39/00; F04B39/0027; F04B39/0077; F04B39/02; F04B39/0215; F04C29/063; F16; F16N; F16N17/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
34 words
The method of claim 1 wherein the predetermined quantity of foaming agent produces a foam when the hermetic compressor unit is operating having a depth in the range of 1 to 2 1/2 inches.
Claim 2
Dependent Claim
29 words
The method of claim 1 wherein the predetermined quantity of foaming agent is in the range of 100 to 1,000 parts per million by weight of the lubricating oil.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the predetermined quantity of foaming agent is in the range of 150 to 800 parts per million by weight of the lubricating oil.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein the predetermined quantity of foaming agent is in the range of 300 to 800 parts per million by weight of the lubricating oil.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the foaming agent is an organosiloxane.
Claim 6
Dependent Claim
12 words
The method of claim 2 wherein the foaming agent is an organosiloxane.
Claim 7
Dependent Claim
12 words
The method of claim 3 wherein the foaming agent is an organosiloxane.
Claim 8
Dependent Claim
19 words
The method of claim 1 wherein the foaming agent is an organosiloxane having hydrogen, aryl or alkyl ''''R'''' groups.
Claim 9
Dependent Claim
36 words
The method of claim 1 wherein the foaming agent is added to the lubricating oil by being dissolved in a refrigerant which is charged into the refrigeration system in which the hermetic compressor unit is utilized.
Claim 10
Dependent Claim
36 words
The method of claim 2 wherein the foaming agent is added to the lubricating oil by being dissolved in a refrigerant which is charged into the refrigeration system in which the hermetic compressor unit is utilized.
Claim 11
Dependent Claim
36 words
The method of claim 6 wherein the foaming agent is added to the lubricating oil by being dissolved in a refrigerant which is charged into the refrigeration system in which the hermetic compressor unit is utilized.
Claim 12
Dependent Claim
22 words
The method of claim 1 wherein the foaming agent is added directly to the lubricating oil charged into the hermetic compressor unit.
Claim 13
Dependent Claim
22 words
The method of claim 2 wherein the foaming agent is added directly to the lubricating oil charged into the hermetic compressor unit.
Claim 14
Dependent Claim
22 words
The method of claim 6 wherein the foaming agent is added directly to the lubricating oil charged into the hermetic compressor unit.
References Cited (Backward Citations)
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Cited
US2990111A
Cited
US3066857A
Cited
US3155312A
Cited
US3147914A
Cited
US3480205A
Cited
US3614384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |