Filter unit
AssigneeCaware Filtering Corporation
InventorMIN-HUA CHANG
Life of this patent
Estimating the term…
Abstract
A filter unit has a filter cartridge and a rotary filter holder assembly detachably mounted to the filter cartridge. The rotary filter holder assembly has an annular check valve configured to be rotate relative to a filter holder to a closed position and an opened position. When the annular check valve is at the closed position, the inlet channel of the filter holder is sealed by a sealing pad of the annular check valve, and the outlet channel of the filter holder is closed by a top of a base of the annular check valve, thereby preventing fluid in the inlet channel and the outlet channel from leaking.
Claims14
A filter unit comprising:
- a filter cartridge comprising
- a top portion;
- a rotary filter holder assembly detachably mounted to the top portion of the filter cartridge and comprising
- an annular check valve disposed on the top portion of the filter cartridge, configured to be rotated with the filter cartridge, and comprising
- a base disposed on the top portion of the filter cartridge, configured to be rotated with the filter cartridge, and having
- a top;
- and
- a bottom;
- a neck part extending from the top of the base;
- an inlet opening formed in the neck part and fluidly communicating with the filter cartridge;
- an outlet opening formed in the top of the base and fluidly communicating with the filter cartridge;
- and
- a sealing pad disposed at a periphery of the neck part and spaced apart from the inlet opening by an angular interval;
- and
- a filter holder disposed on, surrounding, and rotatably connected to the annular check valve, and the filter holder comprising
- a top;
- a bottom;
- an external peripheral surface;
- an inlet channel;
- and
- an outlet channel;
- wherein the annular check valve is configured to rotated relative to
- the filter holder to a closed position and an opened position;
- when the annular check valve is located at the closed position, the inlet
- channel of the filter is sealed by scaling pad and the outlet channel
- of the filter holder is closed by the top of the base;
- and
- when the annular check valve is located at opened position, the
- inlet channel of the filter holder fluidly communicates with inlet opening of
- the annular check valve, and the outlet channel of the filter holder fluidly
- communicates with outlet opening of the annular check valve.
Dependencies are inferred from the claim text.