US4856374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable transmission
Assignee: Planetroll GmbH and Co KG
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Filing: 1988-02-26
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Granted: 1989-08-15
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Expires: 2008-02-26
Abstract
Abstract In known combinations of a planetary gear transmission with a continuously variable friction drive transmission, unsatisfactory accuracy in operation and excessive overall dimensions are found to be disadvantageous. The transmission according to the invention comprises a planetary gear transmission (11) operatively connected to a continuously variable friction drive transmission (12) with spherical rolling members (19). The transmission according to the invention is finely or infinitesimally adjustable over a wide range of positive or negative transmission ratios and particularly suitable for employ in a closed control system.
Inventors
- 👤 Hubert Kreuzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:13
CPC Classifications
F; F16; F16H; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H37/086; F16H2037/088
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
A transmission comprising: an input shaft; an ouput shaft; a continuously variable friction drive trnasmission (12) including an input component (7), an output component (2) and spherical rolling members (19), with said input shaft (1) being operatively connected for transmitting torque to both said planet carrier (3) and said input component (7), and said output component (2) being oepatively connected to said sun gear (4) and said outer gear (5) being operatively connected to said output shaft (6).
Claim 2
Dependent Claim
78 words
A transmission comprising: an input shaft; an ouput shaft; a continuously variable friction drive trnasmission (12) including an input component (7), an output component (2) and spherical rolling members (19), with said input shaft (1) being operatively connected for transmitting torque to both said planet carrier (3) and said input component (7), and said output component (2) being oepatively connected to said sun gear (4) and said outer gear (5) being operatively connected to said output shaft (6).
Claim 3
Dependent Claim
41 words
A transmission according to claim 1, characterized in that said continuously variable friction drive transmission (12) comprises components (2, 7-10, 19) for determining the rotary speed variation, said components being axially adjustable relative to one another and supported by a housing.
Claim 4
Dependent Claim
90 words
A transmission according to claim 2, characterized in that adjacent at least one end of said housing (13) of said friction drive transmission (12) there is disposed a plastic ring (14) tightly embraced on three sides by said housing, said components (2, 7-10, 19) determining the rotary speed variation being axially supported on a free end surface of said plastic ring through intermediate members (15, 16, 17), the temperature expansion coefficient of said plastic ring (14) being several times greater than that of material from which the housing is constructed.
Claim 5
Dependent Claim
32 words
A transmission according to claim 3, characterized in that said plastic ring (14) and a groove receiving it have a slightly conical cross-sectional shape diverging towards a free side of the ring.
Claim 6
Dependent Claim
24 words
A transmission according to claim 1, characterized in that said input shaft (1) and said output shaft (6) are coaxially aligned with one another.
Claim 7
Dependent Claim
24 words
A transmission according to claim 1, characterized in that said output shaft (6) is formed as a hollow shaft surrounding said input shaft (1).
Claim 8
Dependent Claim
23 words
A transmission according to claim 1, characterized in that said planetary gear (11) is configured in the form of a trochoid drive transmission.
Claim 9
Dependent Claim
23 words
A transmission according to claim 1, characterized in that said planetary gear (11) is configured in the form of a differential gear transmission.
References Cited (Backward Citations)
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US4424726A
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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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |