Adapter assembly including a removable trocar assembly

A locking mechanism for releasably securing a trocar assembly within a sleeve of an adapter assembly, the locking mechanism comprising:

• a housing supportable within the sleeve of the adapter assembly;
• first and second button members supported within the housing and selectively movable between a first position and a second position;
• first and second locking members corresponding to the first and second button members, the first and second locking members being selectively movable in response to movement of the respective first and second button members, the first and second locking members being configured for selective reception within respective first and second locking openings of the trocar assembly;
• and,
• first and second biasing members configured to bias the respective first and second locking members to a locked position.

An adapter assembly configured to connect a loading unit to a handle assembly, the adapter assembly comprising:

• a sleeve;
• a trocar assembly releasably securable within the sleeve, the trocar assembly including a trocar housing defining first and second locking openings;
• and
• a locking mechanism for releasably securing the trocar assembly within the sleeve, the locking mechanism including:
• a housing supported within the sleeve;
• first and second button members supported within the housing and selectively movable between a first position and a second position;
• first and second locking members corresponding to the first and second button members, the first and second locking members being selectively movable in response to movement of the respective first and second button members, the first and second locking members being configured for selective reception within the respective first and second locking openings of the trocar assembly;
• and,
• first and second biasing members configured to bias the respective first and second locking members to a locked position.