Double diaphragm compound shaft

A compound shaft comprising:

• a first stiff shaft having a hollow sleeve at one end thereof;
• a tie bolt shaft having a generally cup shaped member at one end thereof;
• a second stiff shaft removably mounted upon said tie bolt shaft;
• and
• a flexible disk shaft having a pair of flexible disks and a quill shaft disposed between and connecting said pair of flexible disks,
• one of said pair of flexible disks of said flexible disk shaft interference fit over the hollow sleeve of said first stiff shaft and the other of said pair of flexible disks of said flexible disk shaft interference fit into said generally cup shaped member of said tie bolt shaft.

A compound shaft comprising:

• a first stiff shaft;
• a flexible disk shaft having a pair of flexible disks and a quill shaft disposed between and connecting said pair of flexible disks;
• a tie bolt shaft having a generally cup shaped member at one end thereof;
• and
• a second stiff shaft including a compressor wheel, a bearing rotor, and a turbine wheel removably mounted upon said tie bolt shaft,
• one of said pair of flexible disks of said flexible disk shaft interference fit with said first stiff shaft and the other of said pair of flexible disks of said flexible disk shaft interference fit with said generally cup shaped member of said tie bolt shaft.

A compound shaft comprising:

• a first stiff shaft having a hollow sleeve at one end thereof;
• a tie bolt shaft having a generally cup shaped member at one end thereof;
• a second stiff shaft including a compressor wheel, a bearing rotor, and a turbine wheel removably mounted in compression upon said tie bolt shaft;
• and
• a flexible disk shaft having a pair of flexible disks and a quill shaft disposed between and connecting said pair of flexible disks,
• one of said pair of flexible disks of said flexible disk shaft interference fit over the hollow sleeve of said first stiff shaft and the other of said pair of flexible disks of said flexible disk shaft interference fit into said generally cup shaped member of said tie bolt shaft.