Windscreen wiper arm

• US 8,141,198 B2
• Filed: 09/19/2006
• Issued: 03/27/2012
• Est. Priority Date: 10/10/2005
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Wilms, Christian, Verelst, Hubert, Bubba, Marcello
• Primary Examiner(s): Graham, Gary
• Assistant Examiner(s): JENNINGS, MICHAEL DEANGILO
• Application Number:
  US12/064,876
• Publication Number:
  US 20080209662A1
• Time in Patent Office: 2,016 Days
• Field of Search: 152/503.51, 152/504.5, 152/502.3, 152/503.4, 152/502.7, 152/504, 152/504.1
• US Class Current: 15/250.351
• CPC Class Codes: B60S 1/3427 Arm piece, link piece and mounting head formed as one element
• CPC Class Codes: B60S 1/345 the elements being a link piece and a mounting head
• CPC Class Codes: B60S 1/3877 embedded in the squeegee
• CPC Class Codes: B60S 2001/3825 the squeegee mounted directly to or in wiper blade arm

Abstract

The invention relates to a windscreen wiper arm (10) comprising a wiper bar (40), to which a wiper blade (6) can be attached with or without a spoiler. Said bar is composed of a freely projecting, first arc-shaped wiper bar section (1) with a first curvature variation, to which the wiper blade (6) is attached and of at least one second arc-shaped wiper bar section (2) with a second arc-shaped curvature variation, which adjoins the first wiper bar section (1), to form a snap-off point (12).

Claims

1. Windshield wiper arm (10) having a wiper arm for attaching a wiper blade (6) with or without a spoiler, characterized in that, the wiper rod (41) is comprised of a freely projecting, first arc-shaped wiper rod section (1) with a first curvature progression, to which the wiper blade (6) is attachable, and of at least one second arc-shaped wiper rod section (2) curved along its length with a second arc-shaped curvature progression, which directly adjoins the first wiper rod section (1) to form a first flexion point (12), characterized in that, the second arc-shaped wiper rod section (2) is bent back on one side into a bent back arc-shaped wiper rod section (3) as a two-spoke dual spring system, in which, in an applied state of the wiper arm, the bent-back wiper rod section (3) is curved along its length and runs in a layer plane above or below a positional plane of the second arc-shaped wiper rod section (2) essentially congruent to the second arc-shaped wiper rod section (2) as well as with approximately the same curvature progression as said second wiper rod section along a presentable longitudinal section, a tangential extension of the first arc-shaped wiper rod section (1) and a tangential extension of the second arc-shaped wiper rod section (2) enclose an angle (11) of between 90°

and 180°

, in area of the flexion point (12) as viewed from a side opposite from a wiping edge of the wiper blade (6).

2. Windshield wiper arm according to claim 1, characterized in that, the first and second arc-shaped wiper rod sections (1, 2) are formed by at least a bending process or stamping process from a one-piece metal band that originally runs in a straight line.

3. Windshield wiper arm according to claim 2, characterized in that, the second arc-shaped wiper rod section (2) features the same sense of curvature as the first arc-shaped wiper rod section (1).

4. Windshield wiper arm according to claim 3, characterized in that, the first arc-shaped wiper rod section (1) as well as the second arc-shaped wiper rod section (2) are each convexly curved.

5. Windshield wiper arm according to claim 4, characterized in that, the first arc-shaped wiper rod section (1) has a larger radial radius of curvature in an area of a freely projecting end (7) than in an area of the flexion point (12).

6. Windshield wiper arm according to claim 5, characterized in that, the second arc-shaped wiper rod section (2) has a smaller radial radius of curvature in an area of the flexion point (12) than in an area of its opposite end.

7. Windshield wiper arm according to claim 6, characterized in that, the tangential extension of the first arc-shaped wiper rod section (1) and the tangential extension of the second arc-shaped wiper rod section (2) enclose an angle (11) of approximately 150°

in the area of the flexion point (12) as viewed from a side opposite from the wiping edge of the wiper blade (6).

8. Windshield wiper arm according to claim 7, characterized in that, the first arc-shaped wiper rod section (1) is embodied to be between 100 mm and 10,000 mm longer along its curvature progression, than the second arc-shaped wiper rod section (2) along its curvature progression.

9. Windshield wiper arm according to claim 8, characterized in that, the wiper rod (41) has an end opposite from the freely projecting end, and in that, a connecting element (91) is attached exchangeable on the end opposite from the freely projecting end (7) of the wiper rod (41), with which the wiper rod (41) is couplable to a swivel mechanism (13).

10. Windshield wiper arm according to claim 9, characterized in that, the connecting element (91) is attachable in a resilient manner to the bent-back wiper rod section (3) of the two-spoke dual spring system.

11. Windshield wiper arm according to claim 1, characterized in that, the second arc-shaped wiper rod section (2) features the same sense of curvature as the first arc-shaped wiper rod section (1).

12. Windshield wiper arm according to claim 11, characterized in that, the first arc-shaped wiper rod section (1) as well as the second arc-shaped wiper rod section (2) are each convexly curved.

13. Windshield wiper arm according to claim 1, characterized in that, the first arc-shaped wiper rod section (1) has a larger radial radius of curvature in an area of its freely projecting end (7) than in the area of the flexion point (12).

14. Windshield wiper arm according to claim 1, characterized in that, the second arc-shaped wiper rod section (2) has a smaller radial radius of curvature in the area of the flexion point (12) than in the area of its opposite end.

15. Windshield wiper arm according to claim 1, characterized in that, the first arc-shaped wiper rod section (1) is embodied to be longer along its curvature progression, than the second arc-shaped wiper rod section (2) along its curvature progression.

16. Windshield wiper arm according to claim 1, characterized in that, the wiper rod (41) has a free end and an end opposite from the free end, and that, a connecting element (91) is attached exchangeably on the end opposite from the free end (7) of the wiper rod (41), with which the wiper rod (41) is couplable to a swivel mechanism (13).

17. Windshield wiper arm according to claim 1, characterized in that, a connecting element (91) is attachable in a resilient manner to the bent-back wiper rod section (3) of the two-spoke dual spring system.

18. Windshield wiper arm according to claim 1, characterized in that, the bent-back wiper rod section (3) runs in a layer plane above the positional plane of the second arc-shaped wiper rod section (2).

19. Windshield wiper arm according to claim 1, characterized in that, the second wiper rod section (2) directly adjoins one end of the bent-back wiper rod section (3) to form a second flexion point (23), the bent-back wiper rod section (3) providing a coupling to a swivel mechanism (13).

20. Windshield wiper arm according to claim 19, characterized in that, the coupling to the swivel mechanism (13) is spaced from the second flexion point (23).