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US3728913A Expired / Lapsed US ⏱️ 0.0 years remaining

Planetary gear type reversing device

Assignee: Yanmar Co Ltd
•
Filing: 1971-05-25
•
Granted: 1973-04-24
•
Expires: 1991-05-25
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Abstract

Abstract A reversing device of planetary gear type for marine engines and the like comprising a sun gear mounted on an input shaft, a plurality of inner planet gears in mesh with the sun gear, a plurality of outer planet gears in mesh with said inner planet gears, an internal gear in mesh with said outer planet gears, bearing discs which support said inner and outer planet gears, an output shaft to which one of said bearing discs is fixedly secured, said internal gear being slidably supported only by the planet gears so as to be gripped either between an extension of the other bearing disc and a normal-running pressing member or between a protrusion of the reversing gear case and a reversing pressing member, and a hydraulic piston which is adapted to move into and out of the reversing gear case to attain pressure contact with a side of one of the bearing discs to avoid unintended rotation of the output shaft while the device is in the neutral position.

Inventors

  • 👤 M Nagasaki

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 03:51
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/46; F16H3/60

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 175 words
A reversing apparatus utilizing planetary gears housed in a case comprising a sun gear mounted on an input shaft, a plurality of inner planet gears in mesh with the sun gear, a plurality of outer planet gears in mesh with said inner planet gears, an internal gear in mesh with said outer planet gears and provided with friction plates on opposite sides thereof, first and second bearing discs supporting said inner planet gears and outer planet gears, an output shaft fixedly secured to one of said bearing discs, a first pressing member provided on the surface of said one bearing disc facing the other disc, a protrusion formed on the inner wall of said case, and a second pressing member provided on the inner wall of said case opposite said protrusion, said internal gear having an inner circumferential portion thereof located between said first pressing member and said other bearing disc, and an outer circumferential portion thereof located between said protrusion and said second pressing member to be gripped between either of the opposing pairs.
Claim 2
Dependent Claim 175 words
A reversing apparatus utilizing planetary gears housed in a case comprising a sun gear mounted on an input shaft, a plurality of inner planet gears in mesh with the sun gear, a plurality of outer planet gears in mesh with said inner planet gears, an internal gear in mesh with said outer planet gears and provided with friction plates on opposite sides thereof, first and second bearing discs supporting said inner planet gears and outer planet gears, an output shaft fixedly secured to one of said bearing discs, a first pressing member provided on the surface of said one bearing disc facing the other disc, a protrusion formed on the inner wall of said case, and a second pressing member provided on the inner wall of said case opposite said protrusion, said internal gear having an inner circumferential portion thereof located between said first pressing member and said other bearing disc, and an outer circumferential portion thereof located between said protrusion and said second pressing member to be gripped between either of the opposing pairs.
Claim 3
Dependent Claim 36 words
The reversing apparatus according to claim 1, further comprising means for hydraulically selectively actuating said first and second pressing members to urge said internal gear into selective engagement with said one bearing disc and said protrusion.
Claim 4
Dependent Claim 35 words
The reversing apparatus according to claim 2, further comprising means for disengaging both of said first and second pressing members from contact with said internal gear and returning said internal gear to a neutral position.

References Cited (Backward Citations)

US3097546A Cited
US680825A Cited
US1548917A Cited
US1629021A Cited
US2331684A Cited
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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) 1976-04-23 1976-10-23 1977-04-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-23 1980-10-23 1981-04-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-23 1984-10-23 1985-04-24 $7700.00 Window Closed / Lapsed

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