US3767328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressor with capacity modulation
Assignee: General Electric Co
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Filing: 1972-07-19
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Granted: 1973-10-23
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Expires: 1992-07-19
Abstract
Abstract A rotary refrigerant compressor comprising a compression cylinder, a rotor eccentrically rotatable in the cylinder, suction and discharge ports communicating with the cylinder and a vane slidably mounted in a slot in the cylinder wall between the ports dividing the cylinder into high and low pressure sides includes means for modulating the compressor capacity. The modulation means comprises a bore communicating with the cylinder at a point intermediate the suction and discharge ports and having a modulating port on a side wall of the bore connected to the suction port. The modulating port is opened or closed by means of a plunger slidably mounted in the bore to modulate the compressor capacity.
Inventors
- 👤 W Ladusaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:10
CPC Classifications
F; F04; F04C; F04C28/00; F04C28/10; F04C28/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
160 words
A hermetic rotary refrigerant compressor comprising: a hermetic casing; a rotary compressor positioned in said casing and comprising means including a cylindrical wall member defining a compression cylinder; a rotor eccentrically rotatable in said cylinder; spaced suction and discharge ports in said wall member communicating with said cylinder; a vane slidably mounted in said cylindrical wall member between said ports for engagement with said rotor to divide said cylinder into high and low pressure sides; and means for modulating the capacity of said compressor comprising: a radially extending bore in said cylindrical wall member spaced from said suction port and communicating with said cylinder; means including a passage in said wall member having a modulating port in a wall portion of said bore connecting said suction port to said bore; and a plunger slidably mounted in said bore for movement between a retracted position opening said modulating port and an extended position closing said modulating port and contacting said rotor.
Claim 2
Dependent Claim
160 words
A hermetic rotary refrigerant compressor comprising: a hermetic casing; a rotary compressor positioned in said casing and comprising means including a cylindrical wall member defining a compression cylinder; a rotor eccentrically rotatable in said cylinder; spaced suction and discharge ports in said wall member communicating with said cylinder; a vane slidably mounted in said cylindrical wall member between said ports for engagement with said rotor to divide said cylinder into high and low pressure sides; and means for modulating the capacity of said compressor comprising: a radially extending bore in said cylindrical wall member spaced from said suction port and communicating with said cylinder; means including a passage in said wall member having a modulating port in a wall portion of said bore connecting said suction port to said bore; and a plunger slidably mounted in said bore for movement between a retracted position opening said modulating port and an extended position closing said modulating port and contacting said rotor.
Claim 3
Dependent Claim
58 words
A compressor according to claim 1 including means connecting the volume of said bore behind said plunger to discharge pressure for normally holding said plunger to its extended position; and means connecting said volume to suction pressure to move said plunger to its retracted position for opening said modulating port and thereby reducing the capacity of said compressor.
Claim 4
Dependent Claim
17 words
A compressor according to claim 1 including tension spring means biasing said plunger to its retracted position.
Claim 5
Dependent Claim
19 words
A compressor according to claim 1 in which the connection to said suction port is within the hermetic casing.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |