Patent US4930995A successfully refreshed from Google Patents.
US4930995A
Expired / Lapsed
US
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Device for reducing refrigerant gas pulsations in a compressor
Assignee: Toyota Industries Corp
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Filing: 1989-01-24
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Granted: 1990-06-05
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Expires: 2009-01-24
Abstract
Abstract In a refrigerant gas compressor wherein a refrigerant gas compressed in a cylinder bore is discharged out therefrom into a discharge chamber through a discharge port, there is provided a plurality of attenuating cavities in the discharge chamber each located in such facing relation to the discharge port that the refrigerant gas discharged through said discharge port is introduced into said cavity.
Inventors
- 👤 Shinichi Suzuki
- 👤 Hiroyuki Deguchi
- 👤 Takahiro Hamaoka
- 👤 Sokichi Hibino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:07
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0027; F04B39/0055; F04B27/00; F04B27/08; F04B27/10; F04B27/1036; F04B39/10; F04B39/1066; F04B39/12; F04B39/125
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
In a refrigerant gas compressor having formed therein a plurality of cylinder bores, a discharge chamber communicable with each of said cylinder bores through a discharge port for receiving a refrigerant gas compressed in said each cylinder bore and then discharged out therefrom through said discharge port, and an exit port having an opening formed in said discharge chamber for allowing the refrigerant gas out of said compressor through said exit port, a device for attenuating pulsations of the refrigerant gas in said discharge chamber, comprising a plurality of cavities formed with different depths in said discharge chamber in communication therewith, each of said cavities being located in such facing relation to said discharge port that the refrigerant gas discharged through said discharge port is introduced into said cavity, and the area of said each cavity in transverse cross-section being larger than that of said discharge port.
Claim 2
Dependent Claim
147 words
In a refrigerant gas compressor having formed therein a plurality of cylinder bores, a discharge chamber communicable with each of said cylinder bores through a discharge port for receiving a refrigerant gas compressed in said each cylinder bore and then discharged out therefrom through said discharge port, and an exit port having an opening formed in said discharge chamber for allowing the refrigerant gas out of said compressor through said exit port, a device for attenuating pulsations of the refrigerant gas in said discharge chamber, comprising a plurality of cavities formed with different depths in said discharge chamber in communication therewith, each of said cavities being located in such facing relation to said discharge port that the refrigerant gas discharged through said discharge port is introduced into said cavity, and the area of said each cavity in transverse cross-section being larger than that of said discharge port.
Claim 3
Dependent Claim
29 words
A device according to claim 1, wherein the opening of said exit port is positioned with respect to said cavities at different radially spaced intervals from the respective cavities.
Claim 4
Dependent Claim
31 words
A device according to claim 1, wherein a flow path for the refrigerant gas formed between said discharge port and said exit port is reversed on its way in alternating directions.
References Cited (Backward Citations)
US4109749A
Cited
US4583922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |