Let's Say That Person a Has a Piece of Heavy

Essay

Let's say that person A has a piece of heavy equipment and needs an operator to do a certain job with it. But the equipment has not had a legally required safety inspection. Person B is able to operate the equipment, and he badly needs a job. So B signs a document that says, if there is any harm done as a result of the equipment not meeting safety standards, he assumes responsibility for the harm and that A is not to be held responsible.
B goes to work, an accident happens, and B is injured. A refuses to pay for B's medical costs, so B files a suit against him for those costs. Should B collect his medical costs from A? Construct an argument on one side or the other.