US3678786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variably controlled planetary drive structure and method
Assignee: Power Flo Products Corp
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Filing: 1970-10-12
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Granted: 1972-07-25
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Expires: 1990-10-12
Abstract
Abstract The planetary drive structure includes a variable speed transmission by which the drive structure speed is universally variable in both forward and reverse directions. The drive structure also includes selectively engageable power takeoff structure. The variable speed feature of the transmission is effected by means of a sun gear and a ring gear having planet gears positioned therebetween and means for varying the resistance to rotation of the sun gear. The means for varying the resistance to rotation of the sun gear may be hydraulically or electrically energized and includes selectively operable accessory drive structure. The method of the invention includes the step of varying the speed of a hydraulic transmission in planetary drive structure in both forward and reverse directions substantially universally over the range of speeds thereof, selectively actuating accessories through the variable speed transmission and selectively actuating power takeoff means with the planetary drive structure.
Inventors
- 👤 Otto E Szekely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:33
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0262; F16H2716/00; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19047
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
Reversible unitary variable speed planetary drive structure comprising an input member, at least one output member, an infinitely variable speed transmission positioned between the input member and output member including a rotatably mounted shaft, a spur gear drive member secured to the shaft and engaged with the input member for rotating the shaft, a spider splined to the shaft for rotation therewith having planetary gears secured thereto in angularly spaced apart relation for rotation about their axis and the axis of the shaft, a sleeve driven member rotatably mounted on the spider, a sprocket secured to one end of the sleeve, an external gear located on the sleeve and an internal ring gear on the sleeve engaged with the planet gears, a sun gear rotatably mounted on the shaft also in engagement with the planet gears and means connected to the sun gear for controlling varying of the resistAnce to rotation of the sun gear on the shaft for varying the coupling between the drive member and driven member.
Claim 2
Dependent Claim
169 words
Reversible unitary variable speed planetary drive structure comprising an input member, at least one output member, an infinitely variable speed transmission positioned between the input member and output member including a rotatably mounted shaft, a spur gear drive member secured to the shaft and engaged with the input member for rotating the shaft, a spider splined to the shaft for rotation therewith having planetary gears secured thereto in angularly spaced apart relation for rotation about their axis and the axis of the shaft, a sleeve driven member rotatably mounted on the spider, a sprocket secured to one end of the sleeve, an external gear located on the sleeve and an internal ring gear on the sleeve engaged with the planet gears, a sun gear rotatably mounted on the shaft also in engagement with the planet gears and means connected to the sun gear for controlling varying of the resistAnce to rotation of the sun gear on the shaft for varying the coupling between the drive member and driven member.
Claim 3
Dependent Claim
68 words
Structure as set forth in claim 1 wherein the means for controlled varying of the resistance to rotation of the sun gear on the shaft comprises a hydraulic system including a hydraulic pump having cam actuating means connected rigidly to the sun gear, the resistance to rotation of which cam actuating means is controlled in accordance with the pressure head in the hydraulic system applied to the pump.
Claim 4
Dependent Claim
27 words
Structure as set forth in claim 2 and further including means for controlled actuation of accessory motor means in accordance with the actuation of the hydraulic pump.
Claim 5
Dependent Claim
45 words
Structure as set forth in claim 1 wherein the means for controlled varying of the resistance to rotation of the sun gear on the shaft comprises an electric clutch having a rotor and a stator, the rotor of which is connected to the sun gear.
Claim 6
Dependent Claim
47 words
Structure as set forth in claim 1 and further including means for reversing the direction of drive of the output member with respect to the direction of drive of the input member connected in parallel with the variable speed transmission between the input member and output member.
Claim 7
Dependent Claim
129 words
Structure as set forth in claim 5 wherein the means for reversing the direction of drive of the output member comprises a second rotatably mounted shaft, a sprocket secured to the shaft against axial movement with respect thereto and connected to the transmission for rotation about the shaft in one direction, a spur gear secured to the shaft against axial movement with respect thereto and for rotation thereabout engaged with the transmission for rotation thereby in a direction opposite the one direction and clutch means movable axially on the shaft and secured thereto against rotation relative thereto engageable with the sprocket and spur gear alternatively to provide rotation of the rotatable shaft in opposite directions on axial movement of the clutch means in opposite directions on the rotatable shaft.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |