Patent ID: 6739334
Filing Date: 2004-05-25
Classification: A61M

Abstract:
An expiration cassette comprising:a cassette housing containing a gas passage, an expiratory valve and a flow meter, said cassette housing being adapted to be removably inserted in a receiving section of a ventilator; and said cassette housing having an outer edge and a locking mechanism adapted for locking and unlocking interaction with said receiving section, said locking mechanism comprising a pushbutton disposed at a top of said cassette housing and movable between an open position and a locked position, a spring disposed to exert a force on said pushbutton in a direction urging said pushbutton toward said locked position, and at least one boss mechanically connected to said pushbutton and to said spring so that said boss, when said pushbutton is in said locked position, projects beyond said outer edge of said cassette housing and, when said pushbutton is in said open position, said boss is disposed inside of said outer edge of said cassette housing.