Patent US5363712A successfully refreshed from Google Patents.
US5363712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manual transmission of a motor vehicle
Assignee: Dr Ing HCF Porsche AG
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Filing: 1993-02-25
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Granted: 1994-11-15
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Expires: 2013-02-25
Abstract
Abstract A synchronized manual transmission of a motor vehicle is actuated by a shift roller. The transmission gears can be shifted only by the simultaneous closing of two synchronizer clutches. At least one sliding sleeve of a synchronizer clutch is adjustable independently of the position of the shift roller into the neutral position and inversely from the neutral position into the position determined by the shift roller.
Inventors
- 👤 Robert Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:53
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/08; F16H63/16; F16H63/18; F16H3/00; F16H3/02; F16H3/08; F16H3/087; F16H3/091; F16H3/0915; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19279
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
A manual transmission of a motor vehicle, comprising: a plurality of transmission gears with gearwheel pairs formed by mutually meshing loose wheels and fixed wheels; synchronizer clutches coupleable to the transmission gears such that the transmission gears are shifted by the simultaneous closing of two of said synchronizer clutches, the synchronizer clutches having sliding sleeves; and a shift roller coupleable to the synchronizer clutches to actuate the synchronizer clutches; wherein at least one of said sliding sleeves is adjustable independently of the position of the shift roller into a neutral position and from the neutral position into a position determined by the shift roller.
Claim 2
Dependent Claim
104 words
A manual transmission of a motor vehicle, comprising: a plurality of transmission gears with gearwheel pairs formed by mutually meshing loose wheels and fixed wheels; synchronizer clutches coupleable to the transmission gears such that the transmission gears are shifted by the simultaneous closing of two of said synchronizer clutches, the synchronizer clutches having sliding sleeves; and a shift roller coupleable to the synchronizer clutches to actuate the synchronizer clutches; wherein at least one of said sliding sleeves is adjustable independently of the position of the shift roller into a neutral position and from the neutral position into a position determined by the shift roller.
Claim 3
Dependent Claim
30 words
A manual transmission according to claim 1, further comprising shift forks, which are actuated by the shift roller, and which are engageable in the sliding sleeves of the synchronizer clutches.
Claim 4
Dependent Claim
29 words
A manual transmission according to claim 2, wherein a first one of shift forks, is operable to be uncoupled from the shift roller which actuates said first shift fork.
Claim 5
Dependent Claim
33 words
A manual transmission according to claim 3, further comprising a driving device and a coupling finger, which is disengageable from the driving device, that connect said first shift fork with the shift roller.
Claim 6
Dependent Claim
41 words
A manual transmission according to claim 4, further comprising a curved groove in the driving device and a curve guide fixed to a transmission housing, wherein the coupling finger is swivellable out of the curved groove and into a curve guide.
Claim 7
Dependent Claim
22 words
A manual transmission according to claim 4, wherein the coupling finger and the shift first fork are arranged on a common shaft.
Claim 8
Dependent Claim
50 words
A manual transmission according to claim 4, further comprising a shaft on which the driving device is rotatably disposed on which second and third ones of the shift forks are rotatably and longitudinally slidably disposed, the driving device and the shift forks being actuatable by the shift roller via pins.
Claim 9
Dependent Claim
40 words
A manual transmission according to claim 1, wherein one of said synchronizer clutches participates in the shifting of all transmission gears such that, for each shifted transmission gear, the synchronizer is either in either a first or second closing position.
Claim 10
Dependent Claim
19 words
A manual transmission according to claim 1, wherein the shift roller is operated manually via of a step-by-step systems.
Claim 11
Dependent Claim
25 words
A manual transmission according to claim 1, wherein the shift roller is actuatable by at lest one of a pneumatic and an electric servo drive.
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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) | 1997-11-14 | 1998-05-16 | 1998-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-14 | 2002-05-16 | 2002-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-14 | 2006-05-16 | 2006-11-15 | $7700.00 | Window Closed / Lapsed |