Patent ID: 7387432

Claim:
A mixer comprising: a mixer housing provided with a substrate, a tubular housing extending upward from the substrate and having an outlet defined in a free end thereof and two annular skirts respectively extending downward from two opposed sides of the substrate so as to form a receiving space defined between the two annular skirts and communicating with an interior of the tubular housing; a mixer element having a base plate immovably received in the receiving space and a helix extending upward from the base plate and into the tubular housing, the base plate having two openings defined therethrough communicating with the receiving space; and a mixer inlet portion with a connection plate slidably received in the receiving space, two tubes each extending downward from the connection plate and having a top opening defined in a top face of the connection plate to selectively communicate with a corresponding one of the two openings of the mixer element, two annular recesses each defined in the top face of the connection plate and around a corresponding one of the two top openings to receive therein a seal which is sandwiched between the connection plate and the base plate for prevention of leakage of components received in the two tubes such that when the connection plate is in a first position, communication between the two top openings and the two openings is blocked by the connection plate and when the connection plate is slid to a second position, the two top openings communicate with the two openings and the components in the two tubes are able to be forced into the interior of the tubular housing.