The Kings also sent defenceman Mike Weaver to Manchester on a conditioning assignment. Thornton, 35, a native of London, Ont., has five goals and four assists in 38 NHL games this season.
Pushkarev, 21, has four goals and 11 assists in 29 AHL games. The native of Kazakhstan has previously appearly in only one NHL game.
Weaver, 28, of Brampton, Ont., has two assists in 12 games with the Kings this season.