Patent ID: 8087899

Claim:
An electric fan comprising: a driving assembly having a housing having a sidewall; an inner surface; a front end; a through hole being formed through the outer surface of the housing; a positioning panel protruding from the inner surface of the housing and having two opposite ends; a positioning surface facing the through hole of the housing; and multiple indentations being formed transversely in the positioning surface adjacent to the ends of the positioning panel; and two connectors being formed on and protruding from the positioning surface of the positioning panel and being respectively adjacent to the indentations, and each connector having a mounting shaft corresponding to and being parallel to the indentations of the positioning panel; and a motor being mounted in the housing and having a driving shaft protruding out from the front end of the housing and having a distal end; an impeller assembly being mounted securely on the distal end of the driving shaft of the motor; and a stand being connected to the housing and having a base; and an arm protruding upward from the base and having a top end being mounted through the through hole of the housing; a mounting recess being formed in the top end of the arm; two opposite inner surfaces; two pivot recesses being formed respectively in the inner surfaces of the arm, aligning with each other and being mounted respectively around the mounting shafts of the connectors; and at least two positioning protrusions being formed on the top end of the arm and being resilient, and each one of the at least two positioning protrusions selectively engaging one of the indentations of the positioning panel of the housing.