The Red Wings, who made the moves on Thursday, return from the NHL's Olympic break with a game at Montreal on Wednesday.
Emmerton has appeared in 11 games for Detroit, notching two assists. Sheahan has three goals and eight assists in 18 NHL games this season.
Pulkkinen has 19 goals and 23 assists in 51 games for Grand Rapids on the season, and Almquist has two goals and 31 assists in 48 games for the Griffins.
Stay Connected
NHL.TV™
NHL GameCenter LIVE™ is now NHL.TV™.
Watch out-of-market games and replays with an all new redesigned media player, mobile and connected device apps.
Introducing the new official NHL App, available for iPhone, iPad and Android smartphones and tablets. A host of new features and improved functionality are available across all platforms, including a redesigned league-wide scoreboard, expanded news coverage, searchable video highlights, individual team experiences* and more. The new NHL App on your tablet also introduces new offerings such as 60fps video, Multitasking** and Picture-in-Picture.
*Available only for smartphones
** Available only for suported iPads