Patent ID: 7131203

Claim:
A safety razor blade unit comprising at least one blade with a sharp cutting edge extending lengthwise of the blade unit, the blade being carried by a blade assembly, a sub-frame to which the blade assembly is pivotally joined, the sub-frame including first spring elements, disposed along the length of the blade assembly, configured to resiliently oppose local deformation of the blade unit under shaving forces encountered in regions where the first spring elements act, and second spring elements, interposed between the sub-frame and a base configured to resiliently bias the sub-frame toward a normal position with respect to the base, wherein the first and second spring elements comprise webs of resiliently flexible material, a planar surface of each web normally lying in a plane that is perpendicular to the length of the blade unit, and wherein at least some of the first and second spring elements deform resiliently by buckling, such that during buckling at least a portion of the planar surface of the spring element moves out of the plane.