Patent ID: 9451856
Filing Date: 2016-09-27
CPC Classification: A47L

Claim Text:
1. A surface treating head comprising: a first body defining an inner aperture; and a support body defining an outer aperture, the outer aperture surrounding the inner aperture, and the support body being moveable relative to the first body to allow for relative movement between the inner and outer apertures in a substantially vertical direction; wherein the surface treating head further comprises a bellow seal provided between the first body and the support body that maintains a substantially airtight seal between the first body and support body irrespective of their relative positions and movements; wherein when the first body and support body are in a first relative position, the outer aperture is above the inner aperture in a vertical direction, and when the first body and support body are in a second relative position, the outer aperture is below the inner aperture in a vertical direction; and wherein the surface treating head further comprises a bias for urging one or more of the first body and the support body into a biased position that is the first relative position or the second relative position.