Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1997-11-24
1999-01-19
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
15250351, B60S 132, B60S 136, B60S 134
Patent
active
058601864
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a wiper arm for a lift-controlled windshield wiper device, in particular for an automotive vehicle.
A wiper arm of this type is disclosed in European patent application No. 0 382 346, for example. A pivot part is pivoted at the one end of an elongated coupling member which is part of the wiper arm, in the direction of the windshield being cleaned. At the opposite end, a drive lever is connected to pivot about a tilting axis arranged at right angles relative to the tilting axis of the pivot part. At this end, the coupling member is configured as a bearing bushing in which a pivot pin is arranged that is mounted on one end of the drive lever. The bearing bushing and the end of the drive lever are arranged one behind the other or on top of each other in an axial direction of the pivot pin. The result of an arrangement of this type is a relatively large overall height of the device. The other end of the drive lever is unrotatably connected to a wiper shaft drivable about its axis in pendulum motion.
Proximate the other end of the coupling member, where the pivot part is articulated, another bearing bushing is shaped in the coupling member. This bearing bushing is also arranged vertically to the tilting axis of the pivot part and also accommodates a pivot pin. The pivot pin is mounted at the end of a control lever which, with its other end, is mounted on an axle that is arranged so as to rotate in a bearing fixed on the vehicle body. Also in this pivot bearing between the control lever and the coupling member, the bearing bushing shaped in the coupling member and the end of the control lever are arranged one behind the other or on top of each other in an axial direction of the pivot pin, with the result of an undesirably large overall height. The overall height of this device is increased still further by a crank portion of the coupling member and a crank portion of the control lever. Further, the coupling member and the levers articulated at the coupling member are provided as diecast and injection-molded parts and, for reasons of stability, have a relatively large cross-section, in particular to the effect of an undesirably large overall height.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an improved wiper arm of the type referred to hereinabove having a reduced overall height and a simple and low-cost manufacture.
This object is achieved by a wiper arm wherein the coupling member has a generally U-type cross-section including a back and two parallel legs which project from the back. The back of the U-type cross-section is the narrow longitudinal side of the coupling member which, in the parking position of the wiper arm at the bottom edge of the vehicle windshield, points upwardly, i.e., the coupling member is open in the direction of the bottom windshield edge or the engine compartment of the vehicle. At the open side of the coupling member, the drive lever and the control lever, with one end, extend between the two opposed walls of the coupling member and are supported in these opposed walls of the coupling member to pivot for instance by way of pivot journals or a pivot pin. The fact that the tiltable mounting support of the drive lever or the control lever is simultaneously effected in both opposed walls permits achieving a stable support and, also, proper guide of the coupling member on the drive lever or the control lever.
Thus, the present invention is based on the fundamental idea of favorably applying the sheetmetal working technique when manufacturing a wiper arm which is lift-controlled by a multiple joint. Accordingly, the coupling member of a multiple joint assembly associated with the wiper arm is a sheet-metal shaped part and has a profiled cross-section so that the drive lever or the control lever, which are also comprised in the multiple joint assembly, are pivoted at the coupling member within the cross-sectional height thereof. Due to its profiled cross-section, a coupling member of such a design
REFERENCES:
patent: 4698873 (1987-10-01), Aoki et al.
patent: 4720885 (1988-01-01), Leroy et al.
Kohler Manfred
Ortale Alessandro
Schael Oliver
Graham Gary K.
ITT Manufacturing Enterprises Inc.
Lewis J. Gordon
Twomey Thomas N.
LandOfFree
Lift-controlled windscreen wiper device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lift-controlled windscreen wiper device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lift-controlled windscreen wiper device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1238655