Patent US4429594A successfully refreshed from Google Patents.
US4429594A
Expired / Lapsed
US
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Planetary speed reducer
Assignee: PEERLESS-WINSMITH Inc
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Filing: 1981-04-27
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Granted: 1984-02-07
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Expires: 2001-04-27
Abstract
Abstract A planetary speed reducer having a movable output ring gear; a stationary or fixed ring gear; the ring gears having different numbers of rigid involute teeth, different pitch diameters, equal internal diameters and equal base pitches; a sun gear; and at least one planetary gear mounted for engagement with the sun gear and with each of the ring gears.
Inventors
- 👤 Werner H. Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:02
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/28; F16H1/46; F16H2001/2881
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A planetary speed reducer, comprising: a gear casing; a first ring gear fixedly mounted with respect to said casing; a second ring gear rotatably mounted with respect to said casing; said ring gears having different numbers of teeth, different pitch diameters, equal internal diameters and equal base pitches; a sun gear rotatably mounted with respect to said casing; at least one planetary gear having a common set of teeth for simultaneous mating engagement with said first and second ring gears and with said sun gear; and wherein said first and second ring gears have an addendum difference that is equal to one-half their difference in pitch diameters.
Claim 2
Dependent Claim
107 words
A planetary speed reducer, comprising: a gear casing; a first ring gear fixedly mounted with respect to said casing; a second ring gear rotatably mounted with respect to said casing; said ring gears having different numbers of teeth, different pitch diameters, equal internal diameters and equal base pitches; a sun gear rotatably mounted with respect to said casing; at least one planetary gear having a common set of teeth for simultaneous mating engagement with said first and second ring gears and with said sun gear; and wherein said first and second ring gears have an addendum difference that is equal to one-half their difference in pitch diameters.
Claim 3
Dependent Claim
18 words
The speed reducer according to claim 1, wherein: said gears are of rigid nonflexible construction having involute teeth.
Claim 4
Dependent Claim
38 words
The speed reducer according to claim 2, wherein: the difference in number of teeth between said first and second ring gears is a whole number multiple of the number of said planetary gears in simultaneous mating engagement therewith.
Claim 5
Dependent Claim
32 words
The speed reducer according to claim 3, wherein: said planetary gear has integrally formed teeth of sufficient axial depth to span the teeth of each of said first and second ring gears.
Claim 6
Dependent Claim
41 words
The speed reducer according to claim 3, wherein: said first ring gear is integrally formed with at least a portion of said casing and has a circular outer rim projecting therefrom; and said second ring gear is nested within said rim.
Claim 7
Dependent Claim
20 words
The speed reducer according to claim 3, wherein: said planetary gears each have constant cross-sectional profiles along their axial depth.
Claim 8
Dependent Claim
37 words
The speed reducer according to claim 5, further comprising: a cover plate fixedly mounted to said second ring gear; and a planetary carrier mounted for rotational movement between said cover plate and a portion of said casing.
Claim 9
Dependent Claim
34 words
The speed reducer according to claim 7, wherein: said last mentioned portion comprises a base member fixed to said first ring gear and having a support surface in sliding contact with said planetary carrier.
Claim 10
Dependent Claim
29 words
The speed reducer according to claim 6, wherein: the base pitches of said planetary gears and of said sun gear equals that of said first and second ring gears.
References Cited (Backward Citations)
US507695A
Cited
US1431167A
Cited
US1502107A
Cited
US2456814A
Cited
US2547475A
Cited
US3081648A
Cited
US3421390A
Cited
US3453906A
Cited
US3675510A
Cited
US3792629A
Cited
SU584143A1
Cited
US4043226A
Cited
US4040312A
Cited
US4116293A
Cited
US4091688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |