Eight- to sixteen-speed powershift transmission

A transmission comprising:

• a. a housing;
• b. a first shaft rotatably mounted in said housing for receiving input power and having a first and a second gear fixed for rotation therewith;
• c. a second shaft rotatably mounted in said housing and having
• i. a third gear fixed for rotation therewith;
• ii. a double gear the surfaces of which serve as a fourth and a first gear rotatably mounted thereabout, said fourth gear meshing continuously with said first gear;
• iii. a first clutch for selectively fixing said fourth and fifth gears for rotation with said second shaft;
• iv. a sixth gear rotatably mounted thereabout, said sixth gear meshing continuously with said second gear;
• and
• v. a second clutch for selectively fixing said sixth gear for rotation with said second shaft;
• d. a third shaft rotatably mounted in said housing and having
• i. a seventh gear fixed for rotation therewith and meshing continuously with said third gear;
• ii. an eighth gear rotatably mounted thereabout, said eighth gear meshing continuously with said fifth gear;
• iii. a third clutch for selectively fixing said eighth gear for rotation with said third shaft;
• iv. a ninth gear rotatably mounted thereabout, said ninth gear meshing continuously with said second gear;
• and
• v. a fourth clutch for selectively fixing said ninth gear for rotation with said third shaft;
• said third shaft, seventh gear, third clutch and fourth clutch being substantially identical to said second shaft, third gear, first clutch and second clutch, respectively;
• e. a fourth shaft rotatably mounted in said housing and having
• i. a tenth gear fixed for rotation therewith and meshing continuously with said seventh gear;
• ii. an eleventh gear rotatably mounted thereabout;
• iii. a fifth clutch for selectively fixing said eleventh gear for rotation with said fourth shaft;
• iv. a double gear the surfaces of which serve as a twelfth and a thirteenth gear rotatably mounted thereabout;
• and
• v. a sixth clutch for selectively fixing said twelfth and thirteenth gears for rotation with said fourth shaft;
• said fourth shaft, tenth gear, fifth clutch and sixth clutch being substantially identical to said second shaft, third gear, first clutch and second clutch, respectively;
• f. a fifth shaft rotatably mounted in said housing and having
• i. a fourteenth gear fixed for rotation therewith and meshing continuously with said tenth gear;
• ii. a fifteenth gear rotatably mounted thereabout and meshing continuously with said eleventh gear;
• iii. a seventh clutch for selectively fixing said fifteenth gear for rotation with said fifth shaft;
• iv. a sixteenth gear rotatably mounted thereabout and meshing continuously with said thirteenth gear;
• and
• v. an eighth clutch for selectively fixing said sixteenth gear for rotation with said fifth shaft;
• said fifth shaft, fourteenth gear, seventh clutch and eighth clutch being substantially identical to said second shaft, third gear, first clutch and second clutch, respectively;
• g. a sixth shaft rotatably mounted in said housing and having a seventeenth, an eighteenth and a nineteenth gear fixed for rotation therewith, said seventeenth and nineteenth gears meshing continuously with said eleventh and twelfth gears, respectively;
• h. a seventh shaft rotatably mounted in said housing for providing output power and having a twentieth gear fixed for rotation therewith, said twentieth gear meshing continuously with said eighteenth gear.

A transmission comprising:

• a. a housing;
• b. a first shaft rotatably mounted in said housing for receiving input power and having a first and a second gear fixed for rotation therewith;
• c. a second shaft rotatably mounted in said housing and having
• i. a third gear fixed for rotation therewith;
• ii. a fourth gear rotatably mounted thereabout, said fourth gear meshing continuously with said first gear;
• iii. a first clutch for selectively fixing said fourth gear for rotation with said second shaft;
• iv. a fifth gear rotatably mounted thereabout, said fifth gear meshing continuously with said second gear;
• and
• v. a second clutch for selectively fixing said fifth gear for rotation with said second shaft;
• d. a third shaft rotatably mounted in said housing and having
• i. a sixth gear fixed for rotation therewith and meshing continuously with said third gear;
• ii. a seventh gear rotatably mounted thereabout, said seventh gear meshing continuously with said first gear;
• and
• iii a third clutch for selectively fixing said seventh gear for rotation with said third shaft;
• said third shaft, sixth gear, and third clutch being substantially identical to said second shaft, third gear and first clutch, respectively;
• e. a fourth shaft rotatably mounted in said housing and having
• i. an eighth gear fixed for rotation therewith and meshing continuously with said third gear;
• ii. a ninth gear rotatably mounted thereabout;
• iii. a fourth clutch for selectively fixing said ninth gear for rotation with said fourth shaft;
• iv. a tenth gear rotatably mounted thereabout;
• and
• v. a fifth clutch for selectively fixing said tenth gear for rotation with said fourth shaft;
• said fourth shaft, eighth gear, fourth clutch and fifth clutch being substantially identical to said second shaft, third gear, first clutch and second clutch, respectively;
• f. an intermediate shaft rotatably mounted in said housing and having an eleventh, a twelfth gear and a thirteenth fixed for rotation therewith, said eleventh and thirteenth gears meshing continuously with said ninth and tenth gears, respectively;
• g. an output shaft rotatably mounted in said housing for providing output power and having a fourteenth gear fixed for rotation therewith, said fourteenth gear meshing continuously with said twelfth gear.