Wiper arm with helical torsion spring
AssigneeChampion Spark Plug Italiana S.p.A.
InventorMarcello Scorsiroli
Life of this patent
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Abstract
The invention relates to a simplified wiper arm for motor vehicles. It comprises only a channel (1), an arm extension (2), a mounting head (3), a helical spring (4) and a rivet (5) acting as articulation means between the channel (1) and the mounting head (3). The mounting head (3) is secured to the drive shaft (7) in the area (6) located betweewn the arm extension (2) and the helical spring (4). The geometrical axis of the helical spring (4) extends substantially perpendicularly to the geometrical axis of the drive shaft (7). One of the extremities (4b) of the helical spring (4) exerts a pressure or load on the channel (1) and on the arm extension (2) via a protruding tongue (1a') provided on the channel (1).
Claims6
A wiper arm for wiper blades of motor vehicles or the like comprising a channel (1), an arm extension (2), a mounting head (3) having a substantially annular recess (11), a helical torsion spring (4) and a rivet (5) acting as articulation means between the channel (1) and the mounting head (3), wherein the mounting head (3) is secured to a drive shaft (7, 7'), characterized in that means secure the mounting head (3) to the drive shaft (7, 7') in the area located between the arm extension (2) and the helical torsion spring (4), the helical torsion spring (4) is located in the annular recess (11) in the mounting head (3), and the geometrical axis of the annular recess (11) substantially coincides with the geometrical axis of the rivet (5).
Dependencies are inferred from the claim text.