Wiper device especially for the panes of motor vehicles

• US 6,910,244 B2
• Filed: 02/01/2002
• Issued: 06/28/2005
• Est. Priority Date: 02/21/2001
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Breesch, Frans, De Block, Peter, Wijnants, Peter
• Primary Examiner(s): Graham, Gary K.
• Application Number:
  US10/257,725
• Publication Number:
  US 20030163885A1
• Time in Patent Office: 1,243 Days
• Field of Search: 152/503.2, 152/504.4, 152/504.3, 152/503.51, 403/348, 403/349
• US Class Current: 15/250.32
• CPC Class Codes: B60S 1/3849 Connectors therefor; Connection to wiper arm; Attached to blade
• CPC Class Codes: B60S 1/4074 with means provided on the blade for locking the side pin

Abstract

A wiper system is proposed, which is used to clean windows, in particular of motor vehicles. The wiper system has a driven wiper arm (12), guided on the motor vehicle and movable between two turning points, on whose free end (14), a pivot bolt (36) retained thereon is disposed, whose pivot axis (38) extends transversely to the longitudinal axis of the wiper arm, essentially in the direction of motion (double arrow 22) of the wiper arm (12), on which pivot bolt a wiper blade (16) is supported that can be pivoted about the pivot axis (38) and pressed against the window (28), and the wiper system has means for securing the wiper blade to the pivot bolt, which means have stop faces (78), (86) disposed on the wiper blade transversely to the pivot axis and spaced apart from one another and pointing away from one another, which fittingly engage between securing faces (80, 81), facing one another, of the wiper arm (12). A simple and economical wiper system is obtained if the stop faces of the wiper blade are disposed on the two long sides of a coupling part (32) that is present on the wiper blade and has a bearing bore (34) for the pivot bolt (36); that one securing face of the wiper arm is a cheek region (80) oriented toward the wiper blade; and that the other securing face (81) is embodied on an extension (44), protruding from the bearing bore (34), of the pivot bolt (36), which extension engages the stop face (86), facing away from the wiper arm, of the wiper blade (16) from behind.

Claims

1. A wiper system, in particular for motor vehicle windows, having a driven wiper arm, (12), guided on the motor vehicle and movable between two turning points, on which, and in particular on whose free end (14), a pivot bolt (36) retained thereon is disposed, whose pivot axis (38) extends transversely to the longitudinal axis of the wiper arm, essentially in the direction of motion (double arrow 22) of the wiper arm (12), on which pivot bolt a wiper blade (16) is supported that can be pivoted about the pivot axis (38) and pressed against the window (28), and the wiper system has means for securing the wiper blade to the pivot bolt, which means have stop faces, disposed on the wiper blade transversely to the pivot axis and spaced apart from one another and pointing away from one another, which fittingly engage between securing faces, facing one another, of the wiper arm, wherein the stop faces (78, 86) of the wiper blade are disposed on the two long sides of a coupling part (32) that is present on the wiper blade and has a bearing bore (34) for the pivot bolt (36);

that one securing face of the wiper arm is a cheek region (80) oriented toward the wiper blade; and

that the other securing face (81) is embodied on an extension (44) of the pivot bolt (38), which extension engages the stop face (86), facing away from the wiper arm, of the wiper blade (16) from behind, and wherein the stop face of the wiper blade is embodied on the bottom face (86) of a countersunk feature (64) that extends from the opening of the bore in the circumferential direction and radially, which countersunk feature extends from the long side (62), remote from the wiper arm (12), of the coupling part (30) in the direction of the pivot axis.

2. The wiper system of claim 1, wherein the extension (44) is solidly joined to the pivot bolt (36);

and that the bearing bore (34), on its jacket face (48), is provided with a push-through conduit (50) that is adapted to the extension.

3. The wiper system of claim 1, wherein a plurality of extensions are disposed on the pivot bolt (36);

and that the bearing bore (34), on its jacket face (48), has a plurality of push-through conduits (50), adapted to the extensions and corresponding in number to the number of extensions.

4. The wiper system of claim 1, wherein the countersunk feature (64) is embodied in annular-segmental fashion in the direction of the pivot axis (38);

and that the push-through conduit (50) discharges into the countersunk feature.

5. The wiper system of claim 4, therein the push-through conduit (50) discharges into the countersunk feature (64) near one annular-segmental end face (66).

6. The wiper system of claim 5, wherein the other annular-segmental end face (70) forms an oscillation limitation for the wiper blade (16) supported on the pivot bolt (36).

7. The wiper system of claim 5, wherein the segment angle (68) is greater than the oscillating motion of the wiper blade (16) about the pivot axis (38) of the pivot bolt (36) that occurs during wiping operation.

8. The wiper system of claim 1, therein a depth (72) of the counter sunk feature (64) is at least as great as the height (74) of the extension (44), measured in the direction of the pivot axis (38).

9. The wiper system of claim 1, wherein the coupling part (32) is retained on the upper band face (29), remote from the window (28), of a bandlike-elongated, spring-elastic support element (30), and over at least a portion it rests flatly on the support element;

and that a rubber-elastic wiperstrip (24) that can be placed against the window is disposed, parallel to the longitudinal axis, on the lower band face (31), oriented toward the window (28), of the support element (30).

10. A wiper system, in particular for motor vehicle windows, having a driven wiper arm (12), guided on the motor vehicle and movable between two turning points, on which, and in particular on whose free end (14), a pivot bolt (36) retained thereon is disposed, whose pivot axis (38) extends transversely to the longitudinal axis of the wiper arm, essentially in the direction of motion (double arrow 22) of the wiper arm (12), on which pivot bolt a wiper blade (16) is supported that can be pivoted about the pivot axis (38) and pressed against the window (28), and the wiper system has means for securing the wiper blade to the pivot bolt, which means have stop faces, disposed on the wiper blade transversely to the pivot axis and spaced apart from one another and pointing away from one another, which fittingly engage between securing faces, facing one another, of the wiper arm, wherein the stop faces (78, 86) of the wiper blade are disposed on the two long sides of a coupling part (32) that is present on the wiper blade and has a bearing bore (34) for the pivot bolt (36);

that one securing face of the wiper arm is a cheek region (80) oriented toward the wiper blade; and

that the other securing face (81) is embodied on an extension (44) of the pivot bolt (36), which extension engages the stop face (86), facing away from the wiper arm, of the wiper blade (16) from behind, and wherein the extension (44) is configured as rectangular plate, one long side (81) of which faces toward the pivot bolt (36) and is joined, crossing the pivot axis, to the pivot bolt, preferably integrally, and its length (46) is greater than diameter of the pivot bolt (36).

11. A wiper blade assembly for a wiper system, in particular for motor vehicle windows, having a driven wiper arm (12), guided on the motor vehicle and movable between two turning points, on which, and in particular on whose free end (14), a pivot bolt (36) retained thereon is disposed, whose pivot axis (38) extends transversely to the longitudinal axis of the wiper arm, essentially in the direction of motion (double arrow 22) of the wiper arm (12), the wiper blade assembly comprising a wiper blade (16) supportable on the pivot bolt pivotally about the pivot axis (38) and pressed against the window (28), and means for securing the wiper blade to the pivot bolt, which means have stop faces disposed on the wiper blade transversely to the pivot axis and spaced apart from one another and pointing away from one another, which are fittingly engageable between securing faces, facing one another, of the wiper arm, wherein the stop faces (78, 86) of the wiper blade are disposed on the two long sides of a coupling part (32) that is present on the wiper blade and has a bearing bore (34) for the pivot bolt (36), and wherein one of the stop faces of the wiper blade is embodied on the bottom face (86) of a countersunk feature (64) that extends from the opening of the bore in the circumferential direction and radially, which countersunk feature extends from the long side (62), remote from the wiper arm (12), of the coupling part (30) in the direction of the pivot axis.