Patents Assigned to Getrag Getriebe- und Zahnradfabrik GmbH
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Patent number: 4836348Abstract: A synchronizing mechanism for clutches comprises a gearshift sleeve provided with locking teeth coacting with locking teeth of a synchronizer ring and with separate coupling teeth coacting with the coupling teeth of clutch bodies. The locking teeth of the gearshift sleeve are provided with undercuts whose flanks exhibit substantially the same angle relative to a longitudinal axis of the teeth as the wedge surfaces formed on the ends of the coupling teeth of the clutch bodies. Once synchronism has been reached, these undercuts enable the unit formed by the clutch body and the synchronizer ring to be rotated relative to the gearshift sleeve so that the coupling teeth of the gearshift sleeve can be introduced without any resistance between the coupling teeth of the clutch body.Type: GrantFiled: June 30, 1987Date of Patent: June 6, 1989Assignee: Getrag Getriebe und Zahnradfabrik GmbHInventors: Gunter Knodel, Helga Henzler
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Patent number: 4817773Abstract: In synchronizing mechanisms for clutches having arranged between the clutch body (10) and the axially displaceable gear shift sleeve, each of which are provided with a toothing, a synchronizing ring (14) with teeth (33) having inclined check faces (35, 36) provided on their ends facing the gear shift sleeve, which check faces (35, 36) coact with matching check faces (37, 38) on the ends of the teeth (34) of the gear shift sleeve, it is provided for the purpose of reducing cold scratch that the check faces on the ends of the teeth (34) of the gear shift sleeve are designed asymmetrically in such a manner that the check faces (37) leading in the sense of rotation (28) have a greater axial extension than the check faces (38) trailing in the sense of rotation.Type: GrantFiled: May 27, 1987Date of Patent: April 4, 1989Assignee: Getrag Getriebe-und Zahnradfabrik GmbHInventors: Gunter Knodel, Wolfgang Lees
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Patent number: 4641734Abstract: In a synchronizing mechanism for clutches, there are provided between the gear shift sleeve and the synchronizing ring (14,15) stop bodies in the form of dogs (25, 26) which are in contact with the gear shift sleeve (between the teeth 34) in the circumferential direction by form-locking engagement and in the axial direction through spring-loaded stop balls (21) and in the neutral position are spaced from the synchronizing ring by a distance substantially equal to the axial extension of the check faces (32, 33) between the gear shift sleeve and the synchronizing ring. In this manner it is ensured that during shifting the axial force previously exerted through the check faces (32, 33) on the synchronizing ring (for instance 15) is replaced by an axial force which is transmitted by the dog and which prevents the synchronizing ring from coming off the countercone before the form-locking connection between the gear shift sleeve and the clutch body is established.Type: GrantFiled: May 15, 1984Date of Patent: February 10, 1987Assignee: Getrag Getriebe-und Zahnradfabrik GmbHInventors: Erich Muller, Ruhle Gunter, Wilhelm Stocker
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Patent number: 4640141Abstract: A gearbox-transmission, especially for power vehicles, with synchronized reverse gear, an intermediate-gearwheel providing for the reversal of direction consists of two loose-gearwheels located on the same axis which is beside the input and output shafts, of which the one loose gearwheel engages the input-shaft via a loose-gearwheel and the fixed-gearwheel of one forward-gear, and the other engages the output-shaft via the loose-gearwheel and the fixed-gearwheel of another forward-gear. The two reverse gear loose-gearwheels are connectable with each other by means of a shift-clutch. In this way no additional gearwheels are needed on the input- and output-shaft for the reverse-gear so that the structural length of such a transmission can correspondingly be reduced.Type: GrantFiled: September 14, 1983Date of Patent: February 3, 1987Assignee: GETRAG Getriebe- und Zahnradfabrik GmbHInventors: Gunter Knodel, Georg Helms
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Patent number: 4612824Abstract: A transmission system, in particular for motor vehicles having at least two driven axles, comprises a transmission (1) and two differentials (2, 3) in tandem arrangement, of which at least the transmission (1) is designed as planetary gear. All three gears (1, 2, 3) are arranged coaxially. An arrangement requiring exceptionally little space is obtained when the differentials (2, 3) are likewise designed as planetary gears and when the transmission (1) is arranged between the two differentials (2, 3). The transmission comprises two coaxially arranged hollow shafts (12, 16) passing through the differential (2) following the transmission, and the transmission and the differential (2) have a common planet carrier (21). The two differentials are coupled by the fact that their internal gears (28, 30) are mounted on a common hollow body (29) embracing the transmission (1).Type: GrantFiled: December 10, 1984Date of Patent: September 23, 1986Assignee: GETRAG Getriebe-und Zahnradfabrik GmbHInventor: Gunter Ruhle
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Patent number: 4561532Abstract: In an arrangement embracing an internal combustion engine and transmission, intended in particular for use in motor vehicles, the crankshaft is split on the side of the flywheel (6) facing the engine and the crankshaft sections are interconnected via a torsionally elastic intermediate member (9). The crankshaft section (5) carrying the flywheel (6) may be seated in a bearing (4) disposed in an intermediate flange rigidly connected with the transmission housing (1). Further, the housings (1, 2) of the engine and the transmission may also be connected via elastic elements (31).Type: GrantFiled: September 28, 1982Date of Patent: December 31, 1985Assignee: Getrag Getriebe- und Zahnradfabrik GmbHInventor: Gunter Knodel
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Patent number: 4378710Abstract: The invention relates to a variable-speed transmission for motor cars, in particular a manual gear-box in the form of a synchronized lay-shaft transmission having several forward speeds and one reverse motion, in which the gears of the reverse motion (11, 12) are also constantly meshing and in which the pairs of gears are selectively shifted into the flux of forces by means of a shifting clutch (13). In order to permit low-noise shifting into the reverse motion, the latter (11, 12) is provided with a synchronizer unit (17, 23).Type: GrantFiled: August 28, 1980Date of Patent: April 5, 1983Assignee: Getrag Getriebe-und Zahnradfabrik GmbHInventor: Gunter Knodel
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Patent number: 4181040Abstract: Infinitely variable speed ratio gear drive with reversible output-end direction of rotation, featuring a mechanical power train and a further power train incorporating an infinitely variable and reversible torque transmitting unit which preferably comprises a hydrostatic pump and a hydrostatic motor. The two power trains are re-joined in a planetary gear train, with the mechanical power train delivering its power to the sun gear and the further power train delivering its power to the internal gear via an intermediate transmission and the planet carrier being connected to the output. A third power train with a hydrodynamic converter which also delivers its power to the internal gear can be provided in addition.Type: GrantFiled: October 14, 1977Date of Patent: January 1, 1980Assignee: Getrag Getriebe- und Zahnradfabrik GmbHInventor: Hans Hofmann