Wiper blade having lever assembly

• US 7,137,167 B2
• Filed: 09/28/2004
• Issued: 11/21/2006
• Est. Priority Date: 10/23/2003
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: ASMO Company Limited (DENSO Corporation)
• Inventors: Kiyama, Masaaki, Torii, Naoki
• Primary Examiner(s): Graham, Gary K.
• Application Number:
  US10/950,439
• Publication Number:
  US 20050086759A1
• Time in Patent Office: 784 Days
• Field of Search: 152/502.01, 152/504.4, 152/504.6, 152/503.61, 152/504.51, 152/504.8
• US Class Current: 15/250.201
• CPC Class Codes: B60S 1/3806 Means, or measures taken, for influencing the aerodynamic quality of the wiper blades
• CPC Class Codes: B60S 2001/3813 chacterised by a support harness consisting of several articulated elements
• CPC Class Codes: B60S 2001/382 the backing strip being an essentially planar reinforcing strip, e.g. vertebra

Abstract

A lever assembly is connected to a wiper arm and holds a wiper strip together with a backing plate, which is installed in the wiper strip. The lever assembly includes a plurality of levers. Each lever has a finned portion, in which a fin is integrally formed. The finned portion of each lever forms a mountain fold that has a top ridge. The top ridge of the lever is offset from the center line of the wiper strip on one side of the center line of the wiper strip in a transverse direction that is perpendicular to the center line of the wiper strip. The fin is formed in the finned portion of the lever on the other side of the center line of the wiper strip.

Claims

1. A wiper blade comprising:

a wiper strip that directly wipes a wiping surface;

at least one backing plate that is installed to the wiper strip and extends parallel to a center line of the wiper strip, which extends in a longitudinal direction of the wiper strip through a transverse center of the wiper strip; and

a lever assembly that is connected to a wiper arm and holds the wiper strip together with the at least one backing plate, which is installed in the wiper strip, wherein;

the lever assembly includes a plurality of levers, which are linked together in tournament style;

each lever has a finned portion, in which a fin is integrally formed;

the finned portion of each lever forms a continuous mountain fold that has a first lateral wall, a top ridge and a second lateral wall, which are formed integrally and continuously along an entire length of the mountain fold;

the first and second lateral walls of the mountain fold are arranged on first and second sides, respectively, of the top ridge in a transverse direction that is perpendicular to the center line of the wiper strip;

the top ridge of the finned portion of each lever is offset from the center line of the wiper strip in the transverse direction such that the top ridge is located on a first side of the center line of the wiper strip; and

the fin of each lever is formed in the second lateral wall of the mountain fold, such that the fin of each lever is located on a side of the top ridge that is opposite to the direction of the offset.

2. The wiper blade according to claim 1, wherein the lever assembly has a transverse width, which is generally the same as a transverse width of the wiper strip.

3. The wiper blade according to claim 1, wherein:

one of the plurality of levers includes a connecting arrangement and is connected to the wiper arm through the connecting arrangement;

a center line of the connecting arrangement, which extends through a transverse center of the connecting arrangement, coincides with the center line of the wiper strip;

at least one of the rest of the plurality of levers other than the one of the plurality of levers includes at least one holding claw to hold the wiper strip; and

a center line of each holding claw, which extends through a transverse center of the holding claw, coincides with the center line of the wiper strip.

4. The wiper blade according to claim 1, wherein the top ridge of the finned portion of each lever extends generally parallel to the center line of the wiper strip.

5. The wiper blade according to claim 1, wherein:

one of the plurality of levers includes a connecting arrangement and is connected to the wiper arm through the connecting arrangement; and

each of opposed longitudinal ends of the connecting arrangement includes a drawn portion, which is formed by drawing a metal plate material of the one of the plurality of levers.

6. The wiper blade according to claim 1, wherein:

each of the at least one backing plate is made of a spring material and is convexly curved in a relaxed state in such a manner that a longitudinal center of the backing plate projects in a direction away from the wiping surface;

the wiper strip includes at least one backing plate groove, which extends in the longitudinal direction of the wiper strip and receives the at least one backing plate;

the lever assembly includes a plurality of holding portions, which hold at least one of the wiper strip and the at least one backing plate in a manner that permits sliding movement of the wiper strip and the at least one backing plate relative to the lever assembly in the longitudinal direction of the wiper strip;

the wiper strip, to which the at least one backing plate is installed, has first and second end follower sections, which substantially freely and elastically conform to the wiping surface;

the first end follower section has a predetermined length and is located between a first longitudinal end of the wiper strip and a closest one of the plurality of holding portions, which is closest to the first longitudinal end of the wiper strip; and

the second end follower section has a predetermined length and is located between a second longitudinal end of the wiper strip and a closest one of the plurality of holding portions, which is closest to the second longitudinal end of the wiper strip.

7. The wiper blade according to claim 1, wherein the second lateral wall of the mountain fold includes:

a first wall portion that is located between the top ridge of the mountain fold and the center line of the wiper strip; and

a second wall portion that is located on a second side of the center line of the wiper strip, which is opposite to the first side of the center line.