Patent ID: 7797791

Claim:
A vacuum, comprising: a housing defining a suction inlet opening and a debris chamber in communication with said suction inlet opening; a vacuum pressure source disposed in said housing for providing a vacuum pressure to said suction inlet opening; a removable filter tray accessible from an exterior of said housing and disposed in an airflow path between said suction inlet opening and said vacuum pressure source, wherein said housing includes a base canister portion defining said debris chamber and a head portion removably secured to said base canister portion and including an aperture, said removable filter tray is inserted into the aperture in said head portion and into a guide channel extending from said aperture, said removable filter tray is received in said aperture in said head portion and into said guide channel along an insertion direction that is angled relative to horizontal such that said insertion direction forms an acute angle with a vertical sidewall of said base canister portion, said guide channel including a sloped surface extending at an acute angle therefrom for pressing said removable filter tray against an impeller inlet to provide a sealed connection between said removable filter tray and said impeller inlet.