The Lever Lock embly.Thebaseendisfixedtothemachinebymeansofalockringandcanberotated.Thebagportendholdsthereservoir/breathingcircuitbag.Ahousingenclosesthebagport.Aleverisinstalledontothehousingandclosedbyacover.Theleverispushedbymeansofretainingringandnut,toraisethebagsupportarmandarmisrotatedatthebaseendtothetopposition.Tolowerit,thearmisrotateddown to the lowerposition.Thusthepositionofreservoirbagcanbechangedaccordingtothepatient'sneed.