Wiper blade

Abstract

A wiper blade is presented having a wiper strip, a primary frame, and a pair of secondary frames. The primary frame having a connection device capable of connecting the wiper blade to a wiper arm disposed on a top side of the primary frame, and a connection structure disposed, on opposite ends of the primary frame. The pair of secondary frame, each have a central pivot connection portion and two leg portions extending from the central pivot connection portion, a pivot structure disposed on the central pivot connection portion of the secondary frames wherein the pivot structure of the secondary frames are connected to the connection structures on the ends of the primary frame. A wiper blade is also presented having a wiper strip, a force distribution structure having opposite ends, and a cover.

We claim: 
     
         1 . A wiper blade comprising:
 a wiper strip,   a primary frame, having a top side and opposite ends, a connection device capable of connecting the wiper blade to a wiper arm disposed on the top side of the primary frame, and a connection structure disposed on each of the opposite ends of the primary frame;   a pair of secondary frames, each having a central pivot connection portion and two leg portions extending from the central pivot connection portion, a pivot structure disposed on the central pivot connection portion of the secondary frames;   wherein the pivot structures disposed on the secondary frames are connected to the connection structures on the ends of the primary frame.   
     
     
         2 . The wiper blade of  claim 1  wherein the connection structure on the ends of the primary frame comprises pivot extension walls. 
     
     
         3 . The wiper blade of  claim 1  wherein the secondary frame has a generally thin structure; 
     
     
         4 . The wiper blade of  claim 3  wherein the secondary frame is a beam. 
     
     
         5 . The wiper blade of  claim 3  wherein the secondary frame is a bracket. 
     
     
         6 . The wiper blade of  claim 5  wherein the secondary frame is provided with a strengthening bead. 
     
     
         7 . The wiper blade of  claim 1  wherein the pivot structure is a separate structure attached to the secondary frames. 
     
     
         8 . The wiper blade of  claim 1  wherein the legs of the secondary frames are symmetrical 
     
     
         9 . The wiper blade of  claim 1  wherein one of the two leg portions of a first beam of the pair of beams is longer than the other leg portion of the first beam of the pair of beams. 
     
     
         10 . The wiper blade of  claim 1  wherein at least one leg portion of at least one of the secondary frames is provided with a wiper strip holder capable of securing the wiper strip. 
     
     
         11 . The wiper blade of  claim 1  further comprising at least one tertiary frame, wherein at least one leg portion of at least one of the secondary frames is provided with a tertiary frame connection structure, and wherein the at least one tertiary frame is connected to the tertiary frame connection structure of the least one of the secondary frames. 
     
     
         12 . The wiper blade of  claim 1  further comprising a cover. 
     
     
         13 . The wiper blade of  claim 12  wherein the primary frame further comprises a cover-connection structures. 
     
     
         14 . The wiper blade of  claim 12  wherein the cover is a segmented hard cover, and wherein the cover segments connect to one another via pivot joints, and wherein the cover is secured to the wiper blades at cover connection structures on the primary frame or secondary frame. 
     
     
         15 . The wiper blade of  claim 12  wherein the cover comprises a cover center section and two cover side sections that are made from a soft , elastic material, wherein the cover side sections cover the ends of the cover center section and extend to the ends of the wiper blade. 
     
     
         16 . The wiper blade of  claim 15  wherein a central cover portion is made from a harder material than the two cover side sections. 
     
     
         17 . A wiper blade comprising:
 a wiper strip;   a force distribution structure having opposite ends;   a cover comprising a cover center section having two end portions and two cover side sections that are made from a soft , elastic material, wherein the cover side sections cover the end portions of the cover center section and extend to and cover the opposing ends of the wiper blade.   
     
     
         18 . A wiper blade comprising:
 a wiper strip;   a primary frame having a top side and opposite ends, a connection device capable of connecting the wiper blade to a wiper arm disposed on the top side of the primary frame, and a connection structure disposed, on each of the opposite ends of the primary frame;   a pair of beams, each beam having a center portion and two leg portions extending in opposite directions from the center portion; wherein a pivot structure is connected to the center portion of the beams, and connects to the connection structure on the ends of the primary frame.   
     
     
         19 . The wiper blade of  claim 18  further comprising at least one tertiary frame, wherein at least one of the beams further comprises at least one tertiary frame connection structure and the at least one tertiary frame is connected to the at least one tertiary frame connection structure. 
     
     
         20 . The wiper blade of  claim 18  wherein each of the leg portions of at least one of the beams have a different curvature.