Patent ID: 6209167
Filing Date: 2001-04-03
Classification: A47L

Abstract:
A vacuum cleaner comprising:a casing, an underside to the casing in which the underside has a longitudinal axis, an impeller and drive motor for the impeller, a dust filter, an inlet for dust laden air, an exhaust port in the underside to the casing, a pathway for air to pass from the inlet, through the dust filter and impeller and around the motor, and through the exhaust port;wherein the underside has dished air chambers, covering a substantial area of the underside, in locations selected from the group consisting of i) at least two dished air chambers on the underside, wherein each dished air chamber straddles the longitudinal axis, and adjacent dished air chambers are separated by a dam which is transverse to the longitudinal axis, and wherein the exhaust port is in direct fluid communication with one of the dished air chambers and the exhaust port straddles the longitudinal axis, ii) a first dished air chamber which straddles the longitudinal axis and an exhaust port which straddles the longitudinal axis, wherein the exhaust port is in direct fluid communication with the first air chamber, and at least one pair of dished air chambers wherein corresponding dished air chambers in each pair are on opposing sides of the longitudinal axis separated by a keel skirt, and wherein the first air chamber and the adjacent pair of dished air chambers are separated by a dam which is transverse to the longitudinal axis, and wherein the adjacent pairs of dished air chambers are separated by a dam which is transverse to the longitudinal axis; andwherein the underside has a peripheral groove which is in fluid communication with a member selected from the group consisting of the exhaust port and the air chamber which is in direct fluid communication with the exhaust port, and a combination thereof.