Shaving razor including a biasing member producing a progressively increasing cartridge return torque and handle geometry enhancing control during shaving

A shaving razor including a biasing member producing a progressively increasing cartridge return torque and a handle geometry providing enhanced stability and control during shaving, the shaving razor comprising:

• a. a cartridge comprising:
• 1) a cartridge housing having a front edge portion, a rear edge portion and two opposing side edge portions extending from the front edge portion to the rear edge portion;
• 2) a shaving blade disposed between the front edge portion and the rear edge portion;
• 3) a cutting plane tangent to the rear edge portion and the front edge portion of the cartridge housing with a forward cutting direction toward the front edge portion of the cartridge;
• 4) a point of equilibrium intersecting the cutting plane and balancing the forward portion and the rear portion of the cartridge;
• 5) a cartridge pivot axis providing an axis of rotation for the cartridge;
• and
• 6) a connecting member;
• and
• b. a handle comprising:
• 1) a forward portion comprising a handle connecting structure that connects to the connecting member of the cartridge, the handle connecting structure includes a biasing member that contacts and exerts a progressively increasing return torque on the cartridge as the cartridge rotates about the pivot axis during use, wherein the progressively increasing return torque increases from zero when the cartridge is in a neutral position to a peak torque of about 14 Nmm when the cartridge is in a fully rotated position, wherein the progressively increasing torque increases at a gradient that is less than 0.3 Nmm/degree;
• 2) a rear portion opposite the forward portion comprising a free end;
• 3) an elongate central portion disposed between the forward portion and the rear portion, the elongate central portion having an upper surface and a lower surface and a longitudinal axis disposed therebetween, wherein a projection of the longitudinal axis intersects the cutting plane at a point of intersection, wherein the point of intersection leads the point of equilibrium in the cutting direction by a distance of less than 10 mm;
• 4) a handle load point on the upper surface of the elongate central portion proximate the forward portion;
• and
• 5) a handle roll axis between the point of equilibrium and the free end of the rear portion;
• wherein the handle roll axis intersects or is less than 5 mm below the handle load point.