Wiper arms, and method for producing wiper arms

Abstract

In a method for producing wiper arm and a wiper arm produced by the method a tongue for a rotary angle limiting is punched on a hinge part and correlates with a recess in the hinge part.

What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims:  
     
         1 . A method for producing wiper arms for a motor vehicle, comprising the steps producing at least one element with a punch-bending process; punching out from the at least one element at least two alternating-side oppositely located parts; punching at least at one side of one of said two parts a tongue projecting outwardly beyond a base contour of said one part; punching in the neighboring other of said parts a corresponding recess, so that a predetermined minimum distance between said two parts is not exceeded.  
     
     
         2 . A method as defined in  claim 1;  and further comprising providing the recess with a surface which at least is equal as that of the tongue.  
     
     
         3 . A method as defined in  claim 1;  and further comprising providing the recess with a surface which is greater than that of the tongue.  
     
     
         4 . A method as defined in  claim 1;  and further comprising selecting the recess so that only a minimal required punching distance is punched out as the recess.  
     
     
         5 . A wiper arm, comprising at least one part produced from at least one element and having two ends, said at least one part in a region of its first end has a tongue and in a region of its second end has a recess whose surface is at least as great as that of said tongue.  
     
     
         6 . A wiper arm as defined in  claim 5 , wherein said at least one part is formed as a substantially U-shaped profile part with a base and two lateral legs, said tongue extending from an edge of one lateral leg which faces away from said base.  
     
     
         7 . A wiper arm as defined in  claim 6 , wherein said recess is wider than said tongue.  
     
     
         8 . A wiper arm as defined in  claim 5 , wherein a first distance between an outermost edge of said first end of said at least one part and said tongue corresponds to a second distance between an outermost edge of said second end of said at least one part, and said recess is equal to said second distance.  
     
     
         9 . A wiper arm as defined in  claim 6 , wherein said tongue at an edge of the lateral leg which faces away from said base is bent inwardly so that it extends substantially parallel to said base.