Q: Downloaded mavericks for one mac can i use the same download to install on another mac

Yes, just make sure you save a copy or move it out of the Applications folder or it will be deleted when the install completes.

when it downloads, it will be in the Applications folder, it's called "Install OS X Mavericks.app".

Also, rather than having to copy it onto each mac, you can use the createinstallmedia command within the app to make a bootable USB stick to install from.

That's because the installer is deleted after the install. You'll have to download it again. Copy it before installing this time.

Yes you can.

Nope, you can legally install Mavericks on all Macs that you own or control.

All you need to do is go to System Preferences > App Store and uncheck the automatic install of updates box, then download the Mavericks installer, and copy to a flash drive.  You will need a flash drive of 8 G B or more since the installer is around 5.3 GB.  The installer will be in Finder > Applications.  You can then copy that flash drive installer to the Applications folders in all the Macs you have that are capable of running Mavericks, http://support.apple.com/kb/HT5842.

When the installer runs, the last step in the installtion is for the installer to erase itself.  So makng a copy before the installer runs is essential if you want to avoid redownloading.

Installing from the same installer does not cause problems for Macs on the same network.

You're welcome.

Just an FYI.

It's customary to award the 'Solved' mark to the post that solved it, not to your own question.