US3782225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission especially for motor vehicles
Assignee: Daimler Benz AG
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Filing: 1971-04-02
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Granted: 1974-01-01
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Expires: 1991-04-02
Abstract
Abstract A transmission, especially for motor vehicles, which includes an infinitely variable converter adjoining an engine shaft and several pairs of meshing gears following the converter which are adapted to be selectively engaged or disengaged by way of shifting clutches, whereby one shifting clutch is adapted to connect the engine shaft with a pair of meshing gears, while actually selectively engaged, and the converter, such as a hydrostatic converter, is adapted to be internally uncoupled.
Inventors
- 👤 F Grabow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:19
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/02; B; B60; B60K; B60K17/00; B60K17/04; B60K17/10; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19037; Y10T74/19149; Y10T74/19158; Y10T74/19163
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
371 words
A steplessly adjustable transmission comprising: an input shaft, an output shaft, gear means operatively associated with said input shaft and said output shaft for providing at least two mechanical transmission ratios, a first selectively engageable means operatively associated with said gear means for selectively providing one of said at least two mechanical transmission ratios, a second selectively engageable means operatively associated with said gear means for selectively providing a second of said at least two transmission ratios, infinitely variable transmission means having an input and an output, said infinitely variable transmission means input being operatively connected with said input shaft and said infinitely variable transmission means output being operatively connected with at least one of said gear means, said gear means providing at least two power paths between said infinitely variable transmission means and said output shaft, disabling means operatively connected to said infinitely variable transmission means for selectively disabling the transmission of torque therethrough, a third selectively engageable means effectively connected between said input shaft and one of said at least two power paths for enabling said infinitely variable transmission means to be shifted from a first end position to a second end position, said first and second positions defining the maximum range of said infinitely variable transmission means, and a multi-position control means operatively associated with said disabling means and Said first, second and third selectively engageable means for controlling same, said control means in a first position enabling said first selectively engageable means to engage said gear means providing one of said at least two mechanical ratios throughout said maximum range of said infinitely variable transmission means from said first end position to said second end position, said control means in a second position enabling said infinitely variable transmission means to return to said first end position by simultaneously engaging said third selectively engageable means and said disabling means and thereafter disengaging said first selectively engageable means, said third selectively engageable means and said disabling means and engaging said second selectively engageable means whereby said infinitely variable transmission means can again be shifted substantially over said maximum range with said second of said at least two transmission ratios engaged without interruption of the tractive force in the transmission.
Claim 2
Dependent Claim
371 words
A steplessly adjustable transmission comprising: an input shaft, an output shaft, gear means operatively associated with said input shaft and said output shaft for providing at least two mechanical transmission ratios, a first selectively engageable means operatively associated with said gear means for selectively providing one of said at least two mechanical transmission ratios, a second selectively engageable means operatively associated with said gear means for selectively providing a second of said at least two transmission ratios, infinitely variable transmission means having an input and an output, said infinitely variable transmission means input being operatively connected with said input shaft and said infinitely variable transmission means output being operatively connected with at least one of said gear means, said gear means providing at least two power paths between said infinitely variable transmission means and said output shaft, disabling means operatively connected to said infinitely variable transmission means for selectively disabling the transmission of torque therethrough, a third selectively engageable means effectively connected between said input shaft and one of said at least two power paths for enabling said infinitely variable transmission means to be shifted from a first end position to a second end position, said first and second positions defining the maximum range of said infinitely variable transmission means, and a multi-position control means operatively associated with said disabling means and Said first, second and third selectively engageable means for controlling same, said control means in a first position enabling said first selectively engageable means to engage said gear means providing one of said at least two mechanical ratios throughout said maximum range of said infinitely variable transmission means from said first end position to said second end position, said control means in a second position enabling said infinitely variable transmission means to return to said first end position by simultaneously engaging said third selectively engageable means and said disabling means and thereafter disengaging said first selectively engageable means, said third selectively engageable means and said disabling means and engaging said second selectively engageable means whereby said infinitely variable transmission means can again be shifted substantially over said maximum range with said second of said at least two transmission ratios engaged without interruption of the tractive force in the transmission.
Claim 3
Dependent Claim
47 words
A steplessly adjustable transmission according to claim 1, further including means for selectively shifting said infinitely variable transmission means over said maximum range to thereby effect any desired transmission ratio possible by said infinitely variable transmission means with every mechanical transmission ratio provided by said gear means.
Claim 4
Dependent Claim
22 words
A transmission according to claim 1, characterized in that said disabling means includes means for internally uncoupling said infinitely variable transmission means.
Claim 5
Dependent Claim
19 words
A transmission according to claim 3, characterized in that said infinitely variable transmission means an infinitely variable hydrostatic converter.
Claim 6
Dependent Claim
19 words
A transmission according to claim 1, wherein at least some of said selectively engageable means are shifting clutch means.
Claim 7
Dependent Claim
42 words
A transmission according to claim 5, characterized in that said infinitely variable transmission means includes a hydrostatic converter means with pump and motor means whose circulation is adapted to be short-circuited by said disabling means within the area of its pump means.
Claim 8
Dependent Claim
70 words
A transmission according to claim 6 wherein said input of said hydrostatic converter means is operatively connected with said input shaft by way of a pair of gear means, said output of said hydrostatic converter means is adapted to be connected with two selectively engageable pairs of said gear means providing said at least two power paths and wherein said first and second selectively engageable means include shifting clutch means.
Claim 9
Dependent Claim
39 words
A transmission according to claim 7, wherein the transmission ratio of said pair of gear means connected with said input shaft is inversely equal to the transmission ratio of one of said two selectively engageable pairs of gear means.
Claim 10
Dependent Claim
29 words
A transmission according to claim 8, wherein said third selectively engageable means includes a shifting clutch means and said disabling means includes a means for uncoupling said converter means.
Claim 11
Dependent Claim
52 words
A transmission according to claim 9, wherein a hydraulic system is provided in said control means for the control of said hydrostatic converter means and for the shifting of each of said shifting clutch means, said control means includes a control slide valve means, shifting valve means, and a common shifting installation.
Claim 12
Dependent Claim
48 words
A transmission according to claim 10 wherein said common shifting installation includes a control cam means for said control slide valve means and shifting cam means for the shifting valve means which are spaced relative thereto at distances coordinated to the respective control positions of the converter means.
Claim 13
Dependent Claim
21 words
A transmission according to claim 11, characterized in that said disabling means includes means for internally uncoupling said hydrostatic converter means.
Claim 14
Dependent Claim
72 words
A transmission according to claim 5, wherein said input of said infinitely variable transmission means is operatively connected with said input shaft by way of a pair of gear means, said output of Said infinitely variable transmission means is adapted to be connected with two selectively engageable pairs of said gear means providing said at least two power paths, and wherein said first and second selectively engageable means include shifting clutch means.
Claim 15
Dependent Claim
39 words
A transmission according to claim 13, wherein the transmission ratio of said pair of gear means connected with said input shaft is inversely equal to the transmission ratio of one of said two selectively engageable pairs of gear means.
Claim 16
Dependent Claim
29 words
A transmission according to claim 5, wherein said third selectively engageable means includes a shifting clutch means and said disabling means includes a means for uncoupling said converter means.
Claim 17
Dependent Claim
51 words
A transmission according to claim 5, wherein a hydraulic system is provided in the control means for the control of said converter means and for the shifting of each of said shifting clutch means, said control means includes a control slide valve means, shifting valve means, and a common shifting installation.
Claim 18
Dependent Claim
48 words
A transmission according to claim 16, wherein said common shifting installation includes a control cam means for said control slide valve means and shifting cam means for the shifting valve means which are spaced relative thereto at distances coordinated to the respective control positions of the converter means.
Claim 19
Dependent Claim
42 words
A transmission according to claim 17, characterized in that said infinitely variable transmission means includes a hydrostatic converter means with pump and motor means whose circulation is adapted to be short-circuited by said disabling means within the area of its pump means.
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |