US3783985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission overdrive shifted by clutch release
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1971-12-30
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Granted: 1974-01-08
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Expires: 1991-12-30
Abstract
Abstract An arrangement including a master friction clutch selectively engageable and disengageable with respect to mechanism for controlling a multi-stage change gear transmission with a main gear control group. A control group is shiftable under load and is provided either preceding or following the main control group, in which the group shiftable under load has at least two forward stages with the step of progression of being considerably less than, for instance half, the step of progression of the main control group. During the shifting operation from one control stage to an adjacent control stage of the main control group, first the step of progression of the main control group is subdivided by the group shiftable under load and during the subsequent engagement of the next control stage of the main control group, the interposed control stage of the group shiftable under load is automatically shifted by operation of the master clutch.
Inventors
- 👤 O May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:34
CPC Classifications
B; B60; B60W; B60W30/00; B60W30/18; B60W10/00; B60W10/02; B60W10/10; B60W2710/00; B60W2710/02; B60W2710/021; B60W2710/10; B60W2710/1005; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19167
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
359 words
In a transmission having an input shaft and an output shaft and a plurality of gear sets interposed between said shafts for providing various speed ranges for the transmission, a main gear lever control element movable for making said gear sets selectively effective, a pair of power flow paths in parallel with each other and in series with said gear sets and having respectively different drive ratios which bear a difference in ratio to each other less than the difference in ratio between successive speed ranges of said transmission provided by said gear sets, control shifting means for making said flow paths selectively effective, first means for actuating said control means to make the higher output speed drive ratio power path effective to increase the speed of the output from the one flow path relative to the input shaft, second means for actuating said control means to make the lower output speed drive ratio power path effective to decrease the speed of the output from the other flow path relative to the input shaft below that from the one flow path, said first means being operable prior to making a respective gear set ineffective and said second means being operable after the said gear set has been made ineffective and prior to the next gear set being made effective, each said flow path having a friction clutch therein actuatable to make the respective flow path effective, said control means comprising fluid actuations for said friction clutches and a control valve controlling said fluid actuations, said first and second means comprising solenoid actuators for said control valve and switches interposed between said solenoid actuators and a source of electrical energy, a main clutch actuable to disengage said input shaft from a source of power, a manual lever connected for actuating said switches and having a normal position wherein the switch pertaining to said second means is closed and being movable into a second position wherein the switch pertaining To said first means is closed, and means operable in response to actuation of said clutch for moving said lever from the said second position thereof to the said normal position thereof.
Claim 2
Dependent Claim
359 words
In a transmission having an input shaft and an output shaft and a plurality of gear sets interposed between said shafts for providing various speed ranges for the transmission, a main gear lever control element movable for making said gear sets selectively effective, a pair of power flow paths in parallel with each other and in series with said gear sets and having respectively different drive ratios which bear a difference in ratio to each other less than the difference in ratio between successive speed ranges of said transmission provided by said gear sets, control shifting means for making said flow paths selectively effective, first means for actuating said control means to make the higher output speed drive ratio power path effective to increase the speed of the output from the one flow path relative to the input shaft, second means for actuating said control means to make the lower output speed drive ratio power path effective to decrease the speed of the output from the other flow path relative to the input shaft below that from the one flow path, said first means being operable prior to making a respective gear set ineffective and said second means being operable after the said gear set has been made ineffective and prior to the next gear set being made effective, each said flow path having a friction clutch therein actuatable to make the respective flow path effective, said control means comprising fluid actuations for said friction clutches and a control valve controlling said fluid actuations, said first and second means comprising solenoid actuators for said control valve and switches interposed between said solenoid actuators and a source of electrical energy, a main clutch actuable to disengage said input shaft from a source of power, a manual lever connected for actuating said switches and having a normal position wherein the switch pertaining to said second means is closed and being movable into a second position wherein the switch pertaining To said first means is closed, and means operable in response to actuation of said clutch for moving said lever from the said second position thereof to the said normal position thereof.
Claim 3
Dependent Claim
33 words
In a transmission system according to claim 1, in which said lower output speed drive ratio power path is a direct drive between the input and output shafts of the power flow paths.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |