Patent ID: 7537439

Claim:
A liquid transfer pump comprising: a. a housing formed of a single unitary part; b. a motor disposed within a first portion of said housing, said motor including a rotatable drive shaft; c. a pump cavity formed in a second portion of said housing, said cavity having an open end and an outlet port; d. a volute chamber having an open end, said volute chamber formed within said pump cavity; e. a rotatable impeller disposed within said volute chamber and operatively engaged with said rotatable drive shaft of said motor; f. a cover attached to said open end of said pump cavity and engaged with said open end of said volute chamber to form a volute; and g. an annular region formed in said housing within said pump cavity, said annular region comprising a counterbore within which is disposed a seal, said annular region enclosing a seal flood region, and said annular region including an upper passageway between said pump cavity and said seal flood region and a lower passageway between said pump cavity and said seal flood region, both of said upper passageway and said lower passageway being formed as a part of said housing.