Patent ID: 11927269
Assignee: BLACK & DECKER, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 15:
16. A vacuum cleaner comprising:
a butterfly valve assembly comprising:
at least one conduit having an entrance through which a fluid can pass;
a seal comprising:
an end cap;
an inner tubular side wall attached at one end to the end cap; and
an outer tubular side wall attached at the one end to the end cap and which surrounds the inner tubular side wall and extends in a same direction as the inner tubular side wall to provide a first gap between the inner tubular side wall and outer tubular side wall;

wherein at least the inner tubular side wall is made from a resiliently deformable material;
wherein the seal is mounted in the entrance of the conduit so that the end cap abuts against an edge of the entrance and the inner tubular side wall and outer tubular side wall extend into the entrance with the outer tubular wall abutting against an inner surface of the conduit with no portion of the conduit received in the first gap; and
a rotatable pivotal disk mounted inside the inner tubular side wall of the seal within the entrance which can be rotated between a first position where the periphery of the disk engages the inner tubular side wall of the seal to seal the entrance of the conduit and a second position where the disk is orientated at an angle relative to the entrance of the conduit, to disengage the periphery of the disk from the inner wall in order to open the entrance and allow the fluid to pass through the conduit.