Main and bypass gear train transmission

Claim 2

In a transmission; a main planetary transmission unit having an input shaft, a primary output shaft, a secondary output shaft, a multiratio gear unit connected to be driven by said input shaFt and connected to drive said primary and secondary output shafts and having a plurality of gear unit drive establishing devices selectively operable for establishing a plurality of ratio drives to said primary output shaft and a drive to said secondary output shaft; bypass gearing having a final output member, a primary gear train connecting said primary output shaft to said final output member and a secondary gear train connecting said secondary output shaft in bypass relation to a portion of said primary gear train and a bypass drive establishing device for establishing a drive from said secondary output shaft to said final output member for the lowest ratio drive, drive controls for selectively engaging said gear unit drive establishing devices for providing said drive to said secondary output shaft and for establishing said bypass drive establishing device for one ratio drive and selectively engaging said gear unit drive establishing devices and disestablishing said bypass drive establishing device to provide a plurality of ratio drives to said primary output shaft to drive said primary gear train and final output member in a plurality of ratio drives.

Claim 3

The invention defined in claim 1 and said primary gear train being a continuously driving gear train.

Claim 4

The invention defined in claim 2 and said multiratio gear unit providing a plurality of forward ratio drives and a reverse ratio drive to said primary output shaft, said primary gear train and output member.

Claim 5

The invention defined in claim 2 and said multiratio gear unit providing a plurality of forward ratio drives and a plurality of reverse ratio drives to said primary output shaft, said primary gear train and said output member.

Claim 6

The invention defined in claim 4 and said multiratio gear unit providing a forward drive and a reverse drive to said secondary output shaft, said secondary gear train and output member for providing a first forward ratio drive and a first reverse drive.

Claim 7

The invention defined in claim 4 and said multiratio gear unit providing a plurality of forward and a plurality of reverse ratio drives to said primary output shaft, primary gear train and final output member, a forward drive to said secondary output shaft which on engagement of the bypass drive establishing device provides a lowest forward drive to said final output member and on engagement of a drive establishing device in said multiratio unit conditioning it for reverse drive and engagement of said bypass drive establishing device a portion of said multiratio gear unit is compounded by the interconnected primary and secondary drive trains to provide a first lowest reverse ratio drive to the final output member.

Claim 8

In a transmission; a main planetary transmission unit having an input shaft, a primary sleeve output shaft element, a secondary quill output shaft element coaxially located within and extending beyond said primary output shaft element at both ends, a multiratio forward and reverse planetary gear unit having a plurality of axially aligned planetary gear sets having interconnected and meshing gear elements connected to be driven by said input shaft and connected to drive said primary output shaft element and said secondary output shaft element having a forward, a reverse and a plurality of ratio drive friction torque establishing devices for establishing on engagement of said forward device and each of said plurality of ratio devices a plurality of forward ratio drives to said primary output shaft element, on engagement of said reverse device and each of said plurality of ratio devices a plurality of reverse ratio drives to said primary output shaft element, on engagement of said forward device providing a forward drive to said secondary output shaft element and on engagement of said reverse device providing a drive to one of said elements; bypass drop box gearing having a final output member parallel and offset relative to said output shaft elements, primary continuously meshing and driving spur gear Train having a ratio increasing gear set driven by said primary output shaft element and driving a ratio decreasing gear set connected to drive said final output member to provide a ratio drive from said primary output shaft element to said final output member and a secondary continuously meshing spur gear train connecting said secondary output shaft element in bypass relation to said ratio increasing gear set and having a reduction gear set driven by said secondary drive shaft element and driving said ratio decreasing gear set and final output member and a bypass clutch establishing a double reduction drive from said secondary output shaft element to said final output member for the lowest ratio drive, control means including drive direction control means for selectively engaging said forward and reverse friction torque establishing devices and ratio control means for selectively engaging said ratio friction torque establishing devices and said bypass clutch for engaging said forward device and said bypass clutch for establishing first ratio forward drive, for engaging said reverse device and said bypass clutch for establishing first ratio reverse drive, said forward ratio device and selectively each of said plurality of ratio devices for establishing each of a plurality of higher forward ratio drives and said reverse ratio drives and selectively each of said plurality of ratio devices for establishing each of a plurality higher reverse ratio drives.

Claim 9

In a transmission; a main planetary transmission unit having an input shaft, a primary sleeve output shaft element, a secondary quill output shaft element coaxially located within and extending beyond said primary output shaft element at both ends, a multiratio forward and reverse planetary gear unit having a plurality of axially aligned planetary gear sets having interconnected and meshing gear elements connected to be driven by said input shaft and connected to drive said primary output shaft element and said secondary output shaft element having a forward, a reverse and a plurality of ratio drive friction torque establishing devices for establishing on engagement of said forward device and each of said plurality of ratio devices a plurality of forward ratio drives to said primary output shaft element, on engagement of said reverse device and each of said plurality of ratio devices a plurality of reverse ratio drives to said primary output shaft element, on engagement of said forward device providing a forward drive to said secondary output shaft element and on engagement of said reverse device providing a drive to one of said elements; bypass drop box gearing having a final output member parallel and offset relative to said output shaft elements, primary continuously meshing and driving spur gear Train having a ratio increasing gear set driven by said primary output shaft element and driving a ratio decreasing gear set connected to drive said final output member to provide a ratio drive from said primary output shaft element to said final output member and a secondary continuously meshing spur gear train connecting said secondary output shaft element in bypass relation to said ratio increasing gear set and having a reduction gear set driven by said secondary drive shaft element and driving said ratio decreasing gear set and final output member and a bypass clutch establishing a double reduction drive from said secondary output shaft element to said final output member for the lowest ratio drive, control means including drive direction control means for selectively engaging said forward and reverse friction torque establishing devices and ratio control means for selectively engaging said ratio friction torque establishing devices and said bypass clutch for engaging said forward device and said bypass clutch for establishing first ratio forward drive, for engaging said reverse device and said bypass clutch for establishing first ratio reverse drive, said forward ratio device and selectively each of said plurality of ratio devices for establishing each of a plurality of higher forward ratio drives and said reverse ratio drives and selectively each of said plurality of ratio devices for establishing each of a plurality higher reverse ratio drives.

Claim 10

The invention defined in claim 7 and said planetary gear unit having a range ratio gear unit controlled by said plurality of ratio drive friction torque establishing devices and driving said primary output shaft element, a forward and reverse gear unit controlled by said forward and reverse drive friction torque establishing devices and driven by said input shaft and driving said range ratio gear unit and said secondary output shaft element in both forward and reverse drive.

Claim 11

The invention defined in claim 7 and said planetary gear unit having a plurality of compounded planetary gear sets having said gear elements and said control means on engaging said reverse device and bypass clutch establishing a compound reverse drive to one gear element of a planetary gear set compounded by interconnection of the primary and secondary output shaft elements by said primary and second drive trains.

Claim 12

In a transmission; a main planetary transmission unit having an input shaft, a primary sleeve output shaft, a secondary quill output shaft coaxially located within and extending beyond said primary output shaft at both ends, a forward and reverse reduction planetary gear unit connected to be driven by said input shaft and connected to drive said secondary output shaft and having a forward brake for establishing forward reduction drive and a reverse brake for establishing reverse reduction drive and a three speed planetary range gear unit connected with and driven by said secondary shaft and driving said primary output shaft and having low, intermediate and high ratio friction drive establishing devices selectively operable for establishing therein low, intermediate and high ratio drives; drop box gearing having a final output member parallel and offset relative to said output shafts, a primary gear train having a ratio increasing gear set driven by said primary output shaft and driving a ratio decreasing gear set connected to drive said final output member shaft to provide about 1:1 ratio drive from said primary output shaft to said final output member and a secondary gear train connecting said secondary output shaft in bypass relation to said range gear unit and ratio increasing gear set and having a reduction gear set and a bypass clutch establishing a reduction drive from said secondary output shaft to said ratio decreasing gear set and final output member for the lowest ratio drive, drive direction controls for selectively engaging said forward and reverse brake for providing forward or reverse drive and ratio controls for establishing said bypass clutch for first ratio drive, said low ratio device for second drive, said intermediate ratio device for third drive and said high ratio device for fourth drive in either forward or reverse.

Claim 13

In a transmission; a main planetary transmission unit having an input shaft, a primary sleeve output shaft, a secondary quill output shaft coaxially located within and extending beyond said primary output shaft at both ends, a forward and reverse reduction planetary gear unit connected to be driven by said input shaft and connected to drive said secondary output shaft and having a forward brake for establishing forward reduction drive and a reverse brake for establishing reverse reduction drive and a three speed planetary range gear unit connected with and driven by said secondary shaft and driving said primary output shaft and having low, intermediate and high ratio friction drive establishing devices selectively operable for establishing therein low, intermediate and high ratio drives; drop box gearing having a final output member parallel and offset relative to said output shafts, a primary gear train having a ratio increasing gear set driven by said primary output shaft and driving a ratio decreasing gear set connected to drive said final output member shaft to provide about 1:1 ratio drive from said primary output shaft to said final output member and a secondary gear train connecting said secondary output shaft in bypass relation to said range gear unit and ratio increasing gear set and having a reduction gear set and a bypass clutch establishing a reduction drive from said secondary output shaft to said ratio decreasing gear set and final output member for the lowest ratio drive, drive direction controls for selectively engaging said forward and reverse brake for providing forward or reverse drive and ratio controls for establishing said bypass clutch for first ratio drive, said low ratio device for second drive, said intermediate ratio device for third drive and said high ratio device for fourth drive in either forward or reverse.

Claim 14

In a transmission; a main planetary transmission unit having an input shaft, a primary sleeve output shaft, a secondary quill output shaft coaxially located within and extending beyond said primary output shaft at both ends, a forward and reverse multiratio planetary gear unit connected to be driven by said input shaft and connected to drive said primary output shaft and said secondary output shaft and having a forward clutch for conditioning the gear unit for forward drive and a reverse clutch for conditioning the gear unit for reverse drive and having low, intermediate and high ratio friction drive establishing devices selectively operable with said forward clutch for establishing therein low, intermediate and high ratio forward drives to said primary output shaft, said low and intermediate drive establishing devices selectively operable with said reverse clutch for establishing low and intermediate reverse drives to said primary output shaft, and said forward clutch being engageable to drive said secondary output shaft; drop box gearing having a final output member parallel and offset relative to said output shafts, a primary gear train having a ratio increasing gear set driven by said primary output shaft and driving a ratio decreasing gear set connected to drive said final output member to provide about 1:1 ratio drive from said primary output shaft to said final output member and a secondary gear train connecting said secondary output shaft in bypass relation to said gear unit and ratio increasing gear set and having a reduction gear set and a bypass clutch establishing a reduction drive from said secondary output shaft to said ratio decreasing gear set and final output member for the lowest ratio drive, drive direction controls for selectively engaging said forward and reverse clutch for conditioning the multi ratio gear unit for forward or reverse drive and ratio controls for establishing said bypass clutch for first ratio forward or reverse drive, said low ratio device for second ratio forward or reverse drive, said intermediate ratio device for third ratio forward or reverse drive and said high ratio device for fourth ratio forward drive.

Claim 15

In a transmission; a main planetary transmission unit having an input shaft, a primary sleeve output shaft, a secondary quill output shaft coaxially located within and extending beyond said primary output shaft at both ends, a forward and reverse multiratio planetary gear unit connected to be driven by said input shaft and connected to drive said primary output shaft and said secondary output shaft and having a forward clutch for conditioning the gear unit for forward drive and a reverse clutch for conditioning the gear unit for reverse drive and having low, intermediate and high ratio friction drive establishing devices selectively operable with said forward clutch for establishing therein low, intermediate and high ratio forward drives to said primary output shaft, said low and intermediate drive establishing devices selectively operable with said reverse clutch for establishing low and intermediate reverse drives to said primary output shaft, and said forward clutch being engageable to drive said secondary output shaft; drop box gearing having a final output member parallel and offset relative to said output shafts, a primary gear train having a ratio increasing gear set driven by said primary output shaft and driving a ratio decreasing gear set connected to drive said final output member to provide about 1:1 ratio drive from said primary output shaft to said final output member and a secondary gear train connecting said secondary output shaft in bypass relation to said gear unit and ratio increasing gear set and having a reduction gear set and a bypass clutch establishing a reduction drive from said secondary output shaft to said ratio decreasing gear set and final output member for the lowest ratio drive, drive direction controls for selectively engaging said forward and reverse clutch for conditioning the multi ratio gear unit for forward or reverse drive and ratio controls for establishing said bypass clutch for first ratio forward or reverse drive, said low ratio device for second ratio forward or reverse drive, said intermediate ratio device for third ratio forward or reverse drive and said high ratio device for fourth ratio forward drive.