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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 7357744 | Hydro-mechanical continuously variable transmission The invention comprises a hydro-mechanical continuously variable transmission (HMCVT) that uses a planetary gear system to provide a combination of hydraulic and mechanical power for a vehicle or stationary equipment. The invention further comprises various ancillar... | 04/15/2008 |
| 7326141 | Compact fault tolerant variable cross-drive electromechanical transmission A transmission drive system (TDS) has two AC induction traction motors, each operatively coupled to two semi-independent coaxial traction shafts, and two AC induction steer motors coaxially mounted on a common steer axis parallel to the coaxial traction shafts. A st... | 02/05/2008 |
| 7322896 | Hybrid transmission A hybrid transmission for a four-wheel drive hybrid vehicle. A simple planetary gearset as a front planetary gearset and a double-pinion planetary gearset as a rear planetary gearset are mounted in a rear section of a transmission housing. A pair of motor/generators... | 01/29/2008 |
| 7322901 | Continuously variable transmission A variable speed transmission having a plurality of tilting balls and opposing input and output discs is illustrated and described that provides an infinite number of speed combinations over its transmission ratio range. The use of a planetary gear set allows minimu... | 01/29/2008 |
| 7273016 | Variable speed drive for agricultural seeding machines An agricultural seeding machine includes a mechanical drive; a seed meter including a driven shaft; and a planetary gear set. The planetary gear set includes an input shaft connected with the drive, an output shaft connected with the driven shaft, a ring gear, and a... | 09/25/2007 |
| 7125297 | Continuously variable transmission A variable speed transmission having a plurality of tilting balls and opposing input and output discs is illustrated and described that provides an infinite number of speed combinations over its transmission ratio range. The use of a planetary gear set allows minimu... | 10/24/2006 |
| 7056252 | Transmission for distributing a drive torque A transmission (1) for distributing a drive torque to at least two output shafts (7, 8) which has at least two planetary gear sets (2, 3) with at least three shafts wherein each shaft (4, 5) of a planetary gear set (2, 3) is connec... | 06/06/2006 |
| 5030177 | Hydromechanical steering transmission with improved high range speed performance To increase the top speed of a multi-speed range hydromechanical steering transmission for tracklaying vehicles, the displacements of the hydraulic motors in the two hydrostatic drive units are abruptly destroked from 100% displacement to 80% displacement... | 07/09/1991 |
| 4663987 | Speed-change/steering system for crawler type vehicles A novel speed-change/steering system for crawler type vehicles comprises first and second stepless speed changers and a plurality of planetary gear assemblies disposed along one axis. First and second output shafts of the system are connected to respectiv... | 05/12/1987 |
| 4497218 | Compact drive assembly A drive system for a tracked vehicle includes a composite transmission having a primary transmission unit and a secondary transmission unit which is driven by components of the primary transmission unit. The primary transmission unit includes a propulsion... | 02/05/1985 |
