As noted in Reading a Mac OS X disk from Windows if you can plug your Mac OS X drive into your Windows computer then you can use HFS Explorer to read it.
This works fine for Apple Time Machine Backups: look for the directory called /Backups.backupdb/ and within that, the name of your computer. You’ll find dated directories of your backups. If you’re just after the most recent version of your files, then look for a directory called “Latest”.
It’s quite clever — the folder for a given date shows you not just files backed up on that date but everything that was on your original disk at that date. The magic of file system links.