Patent ID: 7610683

Claim:
A blade unit housing for use in a safety shaving assembly, comprising: a frame defining an aperture configured to receive and support a razor blade carrier; and a skin contacting surface surrounding the aperture and including skin-engaging forward and rearward surfaces, the skin-engaging forward surface being in front and the skin-engaging rearward surface being at the rear of the frame, and the aperture located between the forward surface and the rearward surface, the aspect ratio of the length to width of the skin contacting surface being in the range of from 1:1 to 2.8:1, said shaving assembly during shaving being substantially inflexible over a major longitudinal dimension, the skin contacting surface having a circumscribing perimeter confining a footprint area of at least 450 mm 2 , the forward surface having an area of at least 140 mm 2 within the footprint area and being at least about 18.6% of said footprint area, and the circumscribing perimeter being so shaped that the footprint area confined by said perimeter has a circularity, wherein circularity (C) is a ratio between the area (A) of a shape enclosed by its perimeter (P) to the length of the perimeter as defined by the relation C=A/P2×4 π×100, not less than 70%.