Patent ID: 7748957

Claim:
A pump having a replaceable cartridge for arranging in a pump cartridge body that forms part of a pump cartridge assembly, the pump comprising: a replaceable cartridge configured with one or more protruding members and a pre-loaded locking lever having a locking lever feature; a pump cartridge body configured with one or more corresponding threads and a locking edge; the replaceable cartridge being rotatably coupled to the pump cartridge body by rotating the replaceable cartridge in the pump cartridge body about a ¼ turn to a desired locking position so that the one or more protruding members rotationally couple with the one or more corresponding threads for grabbing, drawing and seating the replaceable cartridge in relation to the pump cartridge body, and so that the locking lever feature of the pre-loaded locking lever rotates past and securely engages the locking edge of the pump cartridge body and locks the replaceable cartridge in relation to the pump cartridge body.