Windscreen wiper arm
View Patent ↗A windscreen wiper arm, particularly for automobiles, includes a mounting head mountable on a drive shaft and an arm member pivotally connected to the mounting head by means of a pivot pin. The arm member has a substantially U-shaped cross-section near the pivot pin comprising two side walls. A part of the mounting head extends between the side walls and beyond the pivot pin. The part is provided with opposite surfaces each facing towards a respective side wall of the arm member. Each surface of the part of the mounting head is positioned spaced-apart from its respective side wall of the arm member, so as to allow paint to enter a space defined between each surface of the part of the mounting head and its respective side wall of the arm member.
1. A windscreen wiper arm, comprising a mounting head mountable on a drive shaft and an arm member pivotally connected to the mounting head by means of a pivot pin, wherein the arm member has a substantially U-shaped cross-section near said pivot pin comprising two side walls, wherein a part of the mounting head extends between the side walls and beyond said pivot pin, and wherein said part is provided with opposite surfaces each facing towards a respective side wall of the arm member, wherein each surface of said part of said mounting head is positioned spaced-apart from its respective side wall of said arm member, so as to allow paint to enter a space defined between each surface of said part of said mounting head and its respective side wall of said arm member wherein said pivot pin extends through said side walls of said arm member and through a transverse bush of said mounting head said transverse bush being of one piece, and wherein said transverse bush extends through said surfaces of said part of said mounting head; and wherein a partly open ring is provided around said transverse bush on the outside of each surface of said part of said mounting head, so as to allow paint to enter the space defined between each surface of said part of said mounting head and its respective side wall of said arm member, wherein the length of said transverse bush is larger than the width of the mounting head at the location of said transverse bush, so as to allow paint to enter the space between each surface of said part of said mounting head and its respective side wall of said arm member, and wherein said ring is a separate piece from that of said bushing.
2. The windscreen wiper arm according to claim 1 , wherein the distance between the one surface of said part of said mounting head and its respective side wall of said arm member equals the distance between the other surface of said part of said mounting head and its respective side wall of said arm member.
3. The windscreen wiper arm according to claim 1 , wherein the distance between each surface of said part of said mounting head and its respective side wall of said arm member is lying within a range between 0.1 mm and 2 mm.
4. The windscreen wiper arm according to claim 3 , wherein the distance is between 0.1 mm and 1 mm.
5. The windscreen wiper arm according to claim 1 , wherein the length of said transverse bush is slightly smaller than the width of the arm member at the location of said transverse bush, so as to limit lateral play of said mounting head relative to said arm member.
6. The windscreen wiper arm according to claim 1 , wherein said partly open ring is formed by a part of a ring having a closed circumference.
7. The windscreen wiper arm according to claim 1 , wherein said partly open ring is formed by a ring having an interrupted circumference.
8. The windscreen wiper arm according to claim 1 , wherein said pivot pin is a rivet.
9. The windscreen wiper arm according to claim 1 , wherein the arm member is made of a metallic material.
10. A windscreen wiper arm comprising:
a mounting head mountable on a drive shaft having opposite outer surfaces;
an arm member having side walls that are laterally spaced and which straddle said outer surfaces of said mounting head;
a bushing supported by said mounting head and providing an opening extending through said outer surfaces of said mounting head;
a pivot pin received in said bushing and extending through corresponding apertures in said side walls of said arm member to couple said arm member pivotally to said mounting head;
a pair of rings provided around the bushing on said outer side surfaces of said mounting head, said rings each having a split ring shape wherein there are opposing end faces of each ring that are circumferentially spaced from one another at their inner and outer radial edges, and wherein said rings are a separate structure from that of said bushing.
11. The windscreen wiper arm of claim 10 , wherein said bushing is a split bushing having circumferential edges which abut along a seam.