US3635580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal refrigerant gas compressor capacity control
Assignee: Daikin Applied Americas Inc
•
Filing: 1970-02-26
•
Granted: 1972-01-18
•
Expires: 1990-02-26
Abstract
Abstract A capacity control for a refrigerant gas compressor is comprised of a throttle disk in a throttle intake passage leading to a nozzle intake passage extending to the intake portions of a rotatable centrifugal gas impeller and gas flow directing vanes are positioned within the nozzle intake passage to properly direct the gas flow from the throttle disk to the impeller vanes.
Inventors
- 👤 Douglas K Richardson
- 👤 John G Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:28
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/462; F04D29/464; F04D27/00; F04D27/02; F04D27/0253; F04D29/4206; F04D29/4213; F04D29/441; F04D29/444; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/51
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
144 words
A capacity control for a centrifugal refrigerant gas compressor having a rotatable impeller with centrally located intake passages and peripherally located compressed gas passages, comprising, a throttle intake passage, a nozzle intake passage extending from said throttle intake passage to the centrally located intake passages of said impeller, a throttle disk pivotally mounted in said throttle intake passage and having at least one aperture for determining the minimum capacity of said compressor when the throttle disk is in a minimum capacity position, means to move said disk from a position transverse to the gas flow for minimum capacity to a position parallel to the gas flow for full capacity and any position therebetween, and a plurality of gas flow directing and straightening vanes extending within said nozzle intake passage to direct the flow of gas into said impeller after passage from said throttle disk.
Claim 2
Dependent Claim
144 words
A capacity control for a centrifugal refrigerant gas compressor having a rotatable impeller with centrally located intake passages and peripherally located compressed gas passages, comprising, a throttle intake passage, a nozzle intake passage extending from said throttle intake passage to the centrally located intake passages of said impeller, a throttle disk pivotally mounted in said throttle intake passage and having at least one aperture for determining the minimum capacity of said compressor when the throttle disk is in a minimum capacity position, means to move said disk from a position transverse to the gas flow for minimum capacity to a position parallel to the gas flow for full capacity and any position therebetween, and a plurality of gas flow directing and straightening vanes extending within said nozzle intake passage to direct the flow of gas into said impeller after passage from said throttle disk.
Claim 3
Dependent Claim
89 words
The invention of claim 1 in which the means to move said disk is comprised of a ring piston concentrically mounted on the outside of said throttle intake passage and connected to said disk by means of a bellcrank to translate reciprocatory movement of said piston to pivotal movement of said disk, and means to enclose said piston in a cylinder concentric with said throttle intake passage for applying a fluid under pressure within said cylinder to either side of said piston for reciprocating the piston in accordance therewith.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |