Patent ID: 8819891
Filing Date: 2014-09-02
Classification: A47L,F16K

Abstract:
1. An inlet valve for a central vacuum cleaning system having a central vacuum motor connected to a piping network, the inlet valve comprising: a main body having an air inlet passageway formed therethrough and an outlet connector to connect the inlet valve to said vacuum piping; an outer door pivotally mounted to said main body over an inlet side of said air inlet passageway on an opposite side of said main body from said outlet connector; an inner door pivotally mounted to said main body, said inner door being positioned between said outer door and said main body and covering an inlet side of said inlet passageway when in a closed position, said inner door being mounted to said outer door wherein said inner and outer doors pivot open and closed together; a releasable latch operatively connected to said outer door to keep said outer door closed and said inner door on an inlet side of said air inlet passageway when said inlet valve is not in use; and a spring to cause said inner door and said outer door to open upon said latch being released; wherein said inner door has a pivot axis displaced from a pivot axis of said outer door.