Patent ID: 7305736

Claim:
A height adjustment apparatus adapted for a rotatable component of a vacuum cleaner, comprising: a rotatable wheel comprising: a central axis; a wheel portion substantially centered on the central axis and adapted to be rotated, wherein the wheel portion ( 102 ) extends at least partially through a wheel aperture in a vacuum cleaner exterior; a hub portion substantially centered on the central axis and including an offset axle aperture that is offset from the central axis, with the offset axle aperture being adapted to receive at least a portion of the rotatable component; one or more detent devices formed as part of the hub portion; a retainer device adapted to be retained in a chassis of the vacuum cleaner, with the retainer device comprising: a body; a hub portion aperture formed in the body and of a size to rotatably receive the hub portion of the rotatable wheel; one or more biasing devices that interact with the one or more detent devices of the hub portion in order to provide a plurality of predetermined detent positions to the height adjustment apparatus, wherein the rotatable component is moved substantially vertically with respect to the central axis when the rotatable wheel is rotated between the plurality of predetermined detent positions; and wherein a rotatable component height is changed by rotation of the rotatable wheel.