US3741041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed reduction gear assembly
Assignee: TH Licensing Inc
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Filing: 1971-08-19
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Granted: 1973-06-26
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Expires: 1991-08-19
Abstract
Abstract A speed reduction gear assembly wherein a large speed reduction is realized from input to output using a minimum of four gears. The input is coaxial with the output. The large gear reduction is a result of the effective rolling center of one of the gears being located at a predeterminable radial point other than on the pitch diameter of the gear it is driving. Alternative embodiments are provided which allow, through the use of additional gears, the transfer of a large amount of torque and permit the rotational output to be taken on the input side of the gear assembly.
Inventors
- 👤 F Boor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:04
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
180 words
A gear assembly which comprises, a frame for supporting the assembly, rotational input means rotatably supported by said frame; an internally toothed ring gear fixed to said frame, an idler pinion in mesh with said internally toothed ring gear; coupling means for operatively coupling said rotational input means to said idler pinion; a pinion carrier for rotatably mounting said idler pinion therein; a drive pinion rotatably mounted in said pinion carrier in mesh with said idler pinion, and an output gear coaxial with said input means and in mesh with said drive pinion, whereby said idler pinion is rotated by said rotational input means to effect an orbiting of said carrier, and thereby said idler pinion and said drive pinion, within said ring gear due to the meshing engagement of said idler pinion and said ring gear, said orbiting of said drive pinion and said meshing engagement of said drive pinion and said idler pinion being effective for altering the rolling center of said drive pinion to incur a speed reduction between said rotational input means and said output gear.
Claim 2
Dependent Claim
180 words
A gear assembly which comprises, a frame for supporting the assembly, rotational input means rotatably supported by said frame; an internally toothed ring gear fixed to said frame, an idler pinion in mesh with said internally toothed ring gear; coupling means for operatively coupling said rotational input means to said idler pinion; a pinion carrier for rotatably mounting said idler pinion therein; a drive pinion rotatably mounted in said pinion carrier in mesh with said idler pinion, and an output gear coaxial with said input means and in mesh with said drive pinion, whereby said idler pinion is rotated by said rotational input means to effect an orbiting of said carrier, and thereby said idler pinion and said drive pinion, within said ring gear due to the meshing engagement of said idler pinion and said ring gear, said orbiting of said drive pinion and said meshing engagement of said drive pinion and said idler pinion being effective for altering the rolling center of said drive pinion to incur a speed reduction between said rotational input means and said output gear.
Claim 3
Dependent Claim
36 words
A gear assembly as claimed in claim 1, wherein said coupling means includes a flange secured to said rotational inpuT means and rotatable mounting means supported thereon for rotatably mounting said idler pinion to said flange.
Claim 4
Dependent Claim
29 words
A gear assembly as claimed in claim 1, wherein said coupling means includes an input pinion mounted on said rotational input means and in mesh with said idler pinion.
Claim 5
Dependent Claim
72 words
A gear assembly as claimed in claim 3, wherein a second idler pinion is rotatably mounted in said pinion carrier in mesh with said internally toothed ring gear and said input pinion, and a second drive pinion is rotatably mounted in said pinion carrier in a fixed axial position with respect to said second idler pinion and in mesh therewith, said second drive pinion also being in mesh with said output gear.
Claim 6
Dependent Claim
20 words
A gear assembly as claimed in claim 4 wherein said internally toothed ring gear is loosely secured to said frame.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |