Patent US3756095A successfully refreshed from Google Patents.
US3756095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring gear arrangement in a planetary drive
Assignee: Tamrock World Corp NV
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Filing: 1971-08-30
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Granted: 1973-09-04
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Expires: 1991-08-30
Abstract
Abstract A sun-gear is fixedly mounted on the end of a rotatable shaft to drive a planetary gear train of the type in which an internal ring-gear is fixed against radial and angular movement by a stationary hub encircling the shaft. A planet carrier is fixed for rotation as a unit with a second hub which extends back over the gear train and which rotates upon and around the stationary hub. The ring-gear is axially located between bosses formed as interrupted planar bearing pads extending from the rotating hub and the planet carrier respectively.
Inventors
- 👤 Cay F Mc
- 👤 R Knopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:30
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/28; B; B60; B60K; B60K17/00; B60K17/04; B60K17/043; B60K17/046
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A drive assembly comprising: (a) a planetary gear train which includes a sun-gear mounted on a rotatable shaft, and internal ring-gear disposed circumferentially about said sun-gear; and planet-gears which are intermeshed between said sun-gear and said ring-gear and which are rotatably driven in an orbit about and by said sun-gear within said ring-gear; (b) a hub which is stationarily mounted about said shaft and means connecting the hub to said ring gear to allow said ring-gear to move only axially; (c) a gear housing comprising a planet carrier for operably holding said planet-gears and a rotating hub fixed to said planet carrier for rotation about said stationary hub; and (d) bearing pads mounted on the inner face of both said planet carrier and said rotating hub engageable with opposite sides of said ring-gear to locate said ring-gear axially with respect to said planetary gear train, said bearing pads being spaced one from another on said inner faces.
Claim 2
Dependent Claim
157 words
A drive assembly comprising: (a) a planetary gear train which includes a sun-gear mounted on a rotatable shaft, and internal ring-gear disposed circumferentially about said sun-gear; and planet-gears which are intermeshed between said sun-gear and said ring-gear and which are rotatably driven in an orbit about and by said sun-gear within said ring-gear; (b) a hub which is stationarily mounted about said shaft and means connecting the hub to said ring gear to allow said ring-gear to move only axially; (c) a gear housing comprising a planet carrier for operably holding said planet-gears and a rotating hub fixed to said planet carrier for rotation about said stationary hub; and (d) bearing pads mounted on the inner face of both said planet carrier and said rotating hub engageable with opposite sides of said ring-gear to locate said ring-gear axially with respect to said planetary gear train, said bearing pads being spaced one from another on said inner faces.
Claim 3
Dependent Claim
23 words
A drive assembly according to claim 1 wherein said ring-gear is an internal spur gear and said planetary gears are also spur gears.
Claim 4
Dependent Claim
37 words
A drive assembly according to claim 1 wherein said means connecting the ring-gear and the first hub is a plurality of splines formed around the latters radial edge to mesh with the teeth of said internal ring-gear.
Claim 5
Dependent Claim
18 words
A drive assembly according to claim 1 wherein said pads are planar and are spaced one from another.
Claim 6
Dependent Claim
13 words
A drive assembly according to claim 1 wherein said pads are selectively detachable.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |