Patent ID: 7421756

Claim:
A rubber blade for a wiper having a flat tension spring frame, said rubber blade comprising: a head portion having: a first part; and a second part connected to said first part by a first hinge, said second part having an upper surface and a lower surface, said upper surface and said first part defining mounting slots located on both sides of the first hinge to receive the flat tension spring frame and being parallel so that a first axis extends perpendicularly through the first hinge between the slots; a wiping portion being connected to the lower surface of said second part of said head portion by a second hinge and having a second axis; and an air pocket formed on a side of the first axis opposite to the direction of convergence, the air pocket comprising a longitudinal groove extending along a length of the rubber blade thereby facilitating deforming and recovering elasticity to the rubber blade, wherein said upper surface and said lower surface converge towards each other in a direction of a lower edge of a windshield.