Patent US2780460A successfully refreshed from Google Patents.
Patent US4435998A successfully refreshed from Google Patents.
US4435998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller type planetary gear having a preloading arrangement
Assignee: Nissan Motor Co Ltd
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Filing: 1981-03-10
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Granted: 1984-03-13
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Expires: 2001-03-10
Abstract
Abstract A ring roller is mounted on an input shaft by a left-hand thread so that when the shaft is rotated in the clockwise direction the sun roller tends to unscrew along the shaft. The sun roller thus drives planet rollers axially along the shafts on which they are rotatably supported into a ring roller which is mounted on an output shaft by a left-hand thread so that it tends, upon being driven in a counter-clockwise direction by the planet rollers, to screw onto the output shaft. The axial movement of the sun roller ceases upon a suitable preloading between the sun, planet and ring rollers' being established.
Inventors
- 👤 Keijiro Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:40
CPC Classifications
F; F16; F16H; F16H13/00; F16H13/10; F16H13/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
Planetary gearing comprising: a first shaft and a sun roller threadably mounted on said first shaft, said sun roller tending to unscrew in a first axial direction along said first shaft when said first shaft is rotated in a first rotational direction; a second shaft and a ring roller threadably mounted on said second shaft, said ring roller tending to unscrew in a second axial direction along said second shaft when said ring roller is rotated in said first rotational direction; and planet roller shafts, planet rollers mounted on said planet roller shafts, and means for permitting said planet rollers to move in the axial direction of said planet roller shafts, said planet rollers being operatively interposed between and arranged to interconnect said sun roller and said ring roller, said ring roller rotating in a second rotational direction when said sun roller rotates in said first rotational direction.
Claim 2
Dependent Claim
148 words
Planetary gearing comprising: a first shaft and a sun roller threadably mounted on said first shaft, said sun roller tending to unscrew in a first axial direction along said first shaft when said first shaft is rotated in a first rotational direction; a second shaft and a ring roller threadably mounted on said second shaft, said ring roller tending to unscrew in a second axial direction along said second shaft when said ring roller is rotated in said first rotational direction; and planet roller shafts, planet rollers mounted on said planet roller shafts, and means for permitting said planet rollers to move in the axial direction of said planet roller shafts, said planet rollers being operatively interposed between and arranged to interconnect said sun roller and said ring roller, said ring roller rotating in a second rotational direction when said sun roller rotates in said first rotational direction.
Claim 3
Dependent Claim
131 words
Planetary gearing comprising: a first shaft and a sun roller threadably mounted on said first shaft, said sun roller tending to unscrew in a first axial direction along said first shaft when said first shaft is rotated in a first rotational direction; a second shaft and a ring roller mounted on said second shaft; and parallel planet roller shafts, said planet rollr shafts being spaced apart at fixed relative positions and distances, planet rollers rotatably mounted on said planet roller shafts, and means for permitting said planet rollers to move axially along said planet roller shafts, said planet rollers being operatively interposed between and arranged to interconnect said sun and ring rollers, said ring roller rotating in a second rotational direction when said sun roller rotates in said first rotational direction.
Claim 4
Dependent Claim
131 words
Planetary gearing comprising: a first shaft and a sun roller threadably mounted on said first shaft, said sun roller tending to unscrew in a first axial direction along said first shaft when said first shaft is rotated in a first rotational direction; a second shaft and a ring roller mounted on said second shaft; and parallel planet roller shafts, said planet rollr shafts being spaced apart at fixed relative positions and distances, planet rollers rotatably mounted on said planet roller shafts, and means for permitting said planet rollers to move axially along said planet roller shafts, said planet rollers being operatively interposed between and arranged to interconnect said sun and ring rollers, said ring roller rotating in a second rotational direction when said sun roller rotates in said first rotational direction.
Claim 5
Dependent Claim
43 words
The planetary gearing of claim 2 wherein said ring roller is threadably mounted to said second shaft, said ring roller tending to unscrew in a second axial direction along said second shaft when said ring roller is rotated in said first rotational direction.
Claim 6
Dependent Claim
69 words
The planetary gearing of claim 2 wherein said sun roller has a first truncated conical surface, each said planet roller has a second and a third truncated conical surface, said second surface being inclined relative to said third surface, and said ring roller has a fourth truncated conical surface, said first and second conical surfaces rolling on each other, said third and fourth conical surfaces rolling on each other.
Claim 7
Dependent Claim
24 words
The planetary gearing of claim 4 wherein all said truncated conical surfaces have the same conical angle, said angle being between 5° and 30°.
Claim 8
Dependent Claim
30 words
The planetary gearing of claim 2 further including a chassis, thrust and radial bearings mounted on said chassis, and said first and second shafts mounted for rotation in said bearings.
Claim 9
Dependent Claim
41 words
The planetary gearing of claim 2 further including an abutment flange mounted on each of said first and second shafts, said sun roller abutting against said first shaft abutment flange, and said ring roller abutting against said second shaft abutment flange.
References Cited (Backward Citations)
GB237353A
Cited
GB235562A
Cited
GB337651A
Cited
GB493152A
Cited
FR908549A
Cited
US2973671A
Cited
GB1175299A
Cited
US3433099A
Cited
GB1341665A
Cited
GB1465838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |