US3625628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacity control operating mechanism for centrifugal compressor
Assignee: Carrier Corp
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Filing: 1970-08-03
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Granted: 1971-12-07
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Expires: 1990-08-03
Abstract
Abstract The capacity control means of a centrifugal gas compressor is connected to a reversible motor by motion transmitting means including a crank structure which functions to move the control member slowly as it approaches and leaves closed position. During that portion of the movement of the control member, the torque applied thereto by the motor is multiplied, permitting the use of a small motor.
Inventors
- 👤 Edson H Byrns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:18
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/462; F04D29/464; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/51
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
Mechanism for operating capacity control means for a centrifugal compressor, said control means being movable between open and closed positions, comprising a frame, an actuating shaft journaled in said frame and being operatively connected to said control means, a power shaft journaled in said frame in spaced relation to said actuating shaft, motion transmitting linkage connecting said power shaft to said actuating shaft, a reversible constant speed motor connected to said power shaft and operable when energized to effect oscillation of said power shaft, said motion transmitting linkage including means operable to reduce the speed of motion of said control means during movement thereof in the vicinity of the closed position.
Claim 2
Dependent Claim
111 words
Mechanism for operating capacity control means for a centrifugal compressor, said control means being movable between open and closed positions, comprising a frame, an actuating shaft journaled in said frame and being operatively connected to said control means, a power shaft journaled in said frame in spaced relation to said actuating shaft, motion transmitting linkage connecting said power shaft to said actuating shaft, a reversible constant speed motor connected to said power shaft and operable when energized to effect oscillation of said power shaft, said motion transmitting linkage including means operable to reduce the speed of motion of said control means during movement thereof in the vicinity of the closed position.
Claim 3
Dependent Claim
199 words
Mechanism for operating capacity control means for a centrifugal compressor, said control means being movable between open and closed positions, comprising a frame, an actuating shaft journaled in said frame and being operatively connected to said control means, a power shaft journaled in said frame in spaced parallel relation to said actuating shaft, a drive arm fixed to said power shaft and extending therefrom for movement in a plane normal to the axis of said shaft upon oscillation thereof, a driven arm fixed to said actuating shaft and extending therefrom for oscillating movement in a plane normal to the axis of said actuating shaft, said driven arm being operatively connected to said drive arm and being movable upon oscillation thereof through an arc between open and closed stop positions corresponding to the open and closed positions of said control means, the axis of said power shaft being located within the sector of movement of said driven arm and spaced in the direction toward said open stop position a distance from the plane extending through the axis of said actuating shaft and bisecting said arc, and a reversible motor connected to said power shaft and operable to effect oscillation thereof.
Claim 4
Dependent Claim
199 words
Mechanism for operating capacity control means for a centrifugal compressor, said control means being movable between open and closed positions, comprising a frame, an actuating shaft journaled in said frame and being operatively connected to said control means, a power shaft journaled in said frame in spaced parallel relation to said actuating shaft, a drive arm fixed to said power shaft and extending therefrom for movement in a plane normal to the axis of said shaft upon oscillation thereof, a driven arm fixed to said actuating shaft and extending therefrom for oscillating movement in a plane normal to the axis of said actuating shaft, said driven arm being operatively connected to said drive arm and being movable upon oscillation thereof through an arc between open and closed stop positions corresponding to the open and closed positions of said control means, the axis of said power shaft being located within the sector of movement of said driven arm and spaced in the direction toward said open stop position a distance from the plane extending through the axis of said actuating shaft and bisecting said arc, and a reversible motor connected to said power shaft and operable to effect oscillation thereof.
Claim 5
Dependent Claim
41 words
Mechanism for operating capacity control means for a centrifugal compressor as set forth in claim 1 wherein said driven arm is mounted for oscillation in a plane spaced outwardly from said drive arm in a direction axially of said power shaft.
Claim 6
Dependent Claim
57 words
Mechanism for operating capacity control means for a centrifugal compressor as set forth in claim 1 wherein the connection between said drive arm and said driven arm includes a block pivotally mounted on said drive arm and being formed with a through aperture, said driven arm extending through said aperture and having sliding connection with said block.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |