US3886816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bidirectional planetary gear transmission
Assignee: Curtiss Wright Corp
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Filing: 1973-10-01
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Granted: 1975-06-03
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Expires: 1993-10-01
Abstract
Abstract The bidirectional planetary gear transmission has a pressurized fluid actuated friction brake assembly for selectively braking alternately the planetary gear carrier and ring gear to effect rotation of an output shaft in one direction and the opposite direction. A locking means is provided to hold the planetary gear carrier or ring against rotation, whichever one is associated with prolonged rotation, without maintaining braking of the pressurized fluid actuated brake assembly. Another feature is that the pressurized fluid actuated friction brake assembly has two brake sets (one coacting with the planetary gear carrier and the other with the ring gear) and a dual piston-cylinder mechanism in which the pistons are connected for conjoined reciprocation so that when one brake set is engaged, the other is automatically disengaged.
Inventors
- 👤 Feo Angelo De
- 👤 Harry N Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:14
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/46; F16H3/60
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
268 words
In a bidirectional planetary gear transmission having a housing, an output means connected to the planetary gear assembly disposed in the housing to be rotatively driven by the planetary gear assembly alternately in opposite directions by arresting alternately the planetary gear carrier and the ring gear of the planetary gear assembly and having pressurized fluid friction brake mechanism operative from a disengaged position to an engaged position wherein the planetary gear carrier is connected to the housing to be thereby arrested and cause the planetary gear assembly to effect rotation of the output means in a predetermined direction, the combination of: a. a locking means operative in an engaged position to secure the planetary gear carrier to the housing and against rotation thereby permitting said brake mechanism to be disengaged; b. said locking means comprising: b-1. a first member supported by the housing for reciprocative movement; b-2. a second member connected for conjoined rotation with the planetary gear carrier and relative to said first member; b-3. a first stop means carried by said first member; b-4. a second stop means carried by said second member; b-5. actuating means for moving said first member relative to said second member so that said first stop means is brought into rotative alignment with said second stop means to thereby prevent rotation of said second member and gear carrier; and b-6. pilot means carried by said first member and coacting with said first and second stop means to guide said first and second stop means into rotative alignment and abutment to prevent rotation of said second member and said planetary gear carrier.
Claim 2
Dependent Claim
268 words
In a bidirectional planetary gear transmission having a housing, an output means connected to the planetary gear assembly disposed in the housing to be rotatively driven by the planetary gear assembly alternately in opposite directions by arresting alternately the planetary gear carrier and the ring gear of the planetary gear assembly and having pressurized fluid friction brake mechanism operative from a disengaged position to an engaged position wherein the planetary gear carrier is connected to the housing to be thereby arrested and cause the planetary gear assembly to effect rotation of the output means in a predetermined direction, the combination of: a. a locking means operative in an engaged position to secure the planetary gear carrier to the housing and against rotation thereby permitting said brake mechanism to be disengaged; b. said locking means comprising: b-1. a first member supported by the housing for reciprocative movement; b-2. a second member connected for conjoined rotation with the planetary gear carrier and relative to said first member; b-3. a first stop means carried by said first member; b-4. a second stop means carried by said second member; b-5. actuating means for moving said first member relative to said second member so that said first stop means is brought into rotative alignment with said second stop means to thereby prevent rotation of said second member and gear carrier; and b-6. pilot means carried by said first member and coacting with said first and second stop means to guide said first and second stop means into rotative alignment and abutment to prevent rotation of said second member and said planetary gear carrier.
Claim 3
Dependent Claim
268 words
In a bidirectional planetary gear transmission having a housing, an output means connected to the planetary gear assembly disposed in the housing to be rotatively driven by the planetary gear assembly alternately in opposite directions by arresting alternately the planetary gear carrier and the ring gear of the planetary gear assembly and having pressurized fluid friction brake mechanism operative from a disengaged position to an engaged position wherein the planetary gear carrier is connected to the housing to be thereby arrested and cause the planetary gear assembly to effect rotation of the output means in a predetermined direction, the combination of: a. a locking means operative in an engaged position to secure the planetary gear carrier to the housing and against rotation thereby permitting said brake mechanism to be disengaged; b. said locking means comprising: b-1. a first member supported by the housing for reciprocative movement; b-2. a second member connected for conjoined rotation with the planetary gear carrier and relative to said first member; b-3. a first stop means carried by said first member; b-4. a second stop means carried by said second member; b-5. actuating means for moving said first member relative to said second member so that said first stop means is brought into rotative alignment with said second stop means to thereby prevent rotation of said second member and gear carrier; and b-6. pilot means carried by said first member and coacting with said first and second stop means to guide said first and second stop means into rotative alignment and abutment to prevent rotation of said second member and said planetary gear carrier.
Claim 4
Dependent Claim
268 words
In a bidirectional planetary gear transmission having a housing, an output means connected to the planetary gear assembly disposed in the housing to be rotatively driven by the planetary gear assembly alternately in opposite directions by arresting alternately the planetary gear carrier and the ring gear of the planetary gear assembly and having pressurized fluid friction brake mechanism operative from a disengaged position to an engaged position wherein the planetary gear carrier is connected to the housing to be thereby arrested and cause the planetary gear assembly to effect rotation of the output means in a predetermined direction, the combination of: a. a locking means operative in an engaged position to secure the planetary gear carrier to the housing and against rotation thereby permitting said brake mechanism to be disengaged; b. said locking means comprising: b-1. a first member supported by the housing for reciprocative movement; b-2. a second member connected for conjoined rotation with the planetary gear carrier and relative to said first member; b-3. a first stop means carried by said first member; b-4. a second stop means carried by said second member; b-5. actuating means for moving said first member relative to said second member so that said first stop means is brought into rotative alignment with said second stop means to thereby prevent rotation of said second member and gear carrier; and b-6. pilot means carried by said first member and coacting with said first and second stop means to guide said first and second stop means into rotative alignment and abutment to prevent rotation of said second member and said planetary gear carrier.
Claim 5
Dependent Claim
15 words
The apparatus of claim 1 wherein said first and second stop means each include splines.
Claim 6
Dependent Claim
36 words
The apparatus of claim 1 wherein said pilot means comprises camming means operative upon reciprocative movement for rotating said first member a limited amount sufficient to provide rotative alignment of said first and second stop means.
Claim 7
Dependent Claim
138 words
The apparatus of claim 1 wherein locking means comprises an annular cylinder connected to the housing and an annular piston disposed for reciprocative movement in said cylinder between an engaged and disengaged position wherein said second member is annular in shape and disposed in axially spaced, concentric relation to said piston, wherein said first and second stop means are a plurality of axially extending spline means which are constructed and arranged to mesh when the piston is reciprocatively moved to an engaged position, and wherein a limiting means is connected to the cylinder and said piston to resiliently limit rotative movement of said piston relative to said second member and said cylinder to an amount sufficient to permit the spline means of the first and second stop means to move into proper position for meshing with each other.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |