According to this tweet from the Democrat Coalition, it seems to suggest that a bill can bypass committee action and be voted on in the Senate, should it obtain a number of cosponsors.
A Senate bill that would reverse the @FCC decision to repeal @BarackObama's #NetNeutrality rules now has 40 cosponsors, allowing it to bypass the @GOP-led committee and head straight to the Senate floor where it needs just 11 more votes to pass
Another tweet from Senator Claire McCaskill's office states that 30 cosponsors are needed to force a vote.
... In order to force a vote on the Senate Floor repealing @FCC’s recent decision to end #NetNeutrality rules, 30 cosponsors were needed ...
Since the minority party in the Senate usually controls at least 30 seats (currently 51–49), it would be relatively easy for the minority party to get 30 cosponsors and force a vote in the Senate. If this is the case, could the Democrats have forced a vote on Merrick Garland's Supreme Court nomination in the Senate, since no committee action was taken?
So, how does this process exactly work, specifically, which Senate rule enables this? How can a bill be put to a vote without committee action?