Windscreen wiper device, particularly for a motor vehicle

• US 7,945,985 B2
• Filed: 02/14/2005
• Issued: 05/24/2011
• Est. Priority Date: 03/26/2004
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Stubner, Armin
• Primary Examiner(s): Graham; Gary K
• Application Number:
  US10/594,288
• Publication Number:
  US 20070199173A1
• Time in Patent Office: 2,290 Days
• Field of Search: 152/503, 152/501.2, 152/500.01, 318/DIG.2, 318/461, 318/471, 318/443, 318/483, 318/434, 318/444, 318/472, 318/473, 318/268, 388/800, 388/838, 388/934, 361/24, 361/25, 361/27
• US Class Current: 15/250.12
• CPC Class Codes: B60S 1/08 electrically driven conjoint control of windscreen wiper motor and liquid supply of windscreen washer B60S1/482; conjoint control of windscreen wiper motor and means for cleaning parts o parts other than windscreens or front windows B60S1/56, B60S1/58, B60S1/606
• CPC Class Codes: H02K 11/25 Devices for sensing temperature, or actuated thereby
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06
• CPC Class Codes: Y10S 318/02 Windshield wiper controls
• CPC Class Codes: Y10S 388/934 Thermal condition

Abstract

Windshield wiper device (10), particularly for a motor vehicle, having at least an electric motor drive (24) is proposed. This comprises an electric motor drive, which can be driven with at least one first speed (V1) and one second speed (V2). According to the invention, a temperature detection means (40) for detecting the operating temperature of the drive (24) and at least one switching means (50) are provided, which, when operating the drive (24) at the second speed (V2), switches the drive (24) from the second speed (V2) to the first speed (V1) when a predetermined operating temperature (T1) is exceeded.

Claims

1. Windshield wiper device (10), for a motor vehicle, having at least an electric motor drive (24), which can be driven with at least one first speed (v1) and a second speed (v2) characterized in that a temperature detection means (40) for detecting the operating temperature of the drive (24) and at least one switching means (50) are provided, which, when operating the drive (24) at the second speed (v2), switches the drive (24) from the second speed (v2) to the first speed (v1) when a predetermined operating temperature (T1) is exceeded, wherein the drive (24) has at least three connections (42, 44, 46), a first connection (42) for the first speed (v1), a second connection (44) for the second speed (v2) as well as a connection to ground (46), wherein a power diode is switched between the first connection (42) and the second connection (44) by the at least one switching means.

2. Windshield wiper device (10) according to claim 1, characterized in that the speeds (v1, v2) differ from a standstill.

3. Windshield wiper device (10) according to claim 2, characterized in that the second speed (v2) is higher than the first speed (v1).

4. Windshield wiper device (10) according to claim 3, characterized in that the switching means (50) is able to interrupt the second connection (44).

5. Windshield wiper device (10) according to claim 4, characterized in that an additional switching means (54) is provided, which switches off the drive (24) when an additional predetermined operating temperature (T2) is exceeded.

6. Windshield wiper device (10) according to claim 5, characterized in that the additional switching means (54) is connected to the connection to ground (46).

7. Windshield wiper device (10) according to claim 6, characterized in that filter elements are switched between the switching means (50) and the first and/or second connection (42, 44).

8. Windshield wiper device (10) according to claim 7, characterized in that the temperature detection means (40) and the switching means (50) are embodied as one piece as a thermal switch (48).

9. Windshield wiper device (10) according to claim 1, characterized in that the second speed (v2) is higher than the first speed (v1).

10. Windshield wiper device (10) according to claim 1, characterized in that the switching means (50) is able to interrupt the second connection (44).

11. Windshield wiper device (10) according to claim 10, characterized in that a power diode is switched between the first connection (42) and the second connection (44).

12. Windshield wiper device (10) according to claim 1, characterized in that an additional switching means (54) is provided, which switches off the drive (24) when an additional predetermined operating temperature (T2) is exceeded.

13. Windshield wiper device (10) according to claim 12, characterized in that the additional switching means (54) is connected to the connection to ground (46).

14. Windshield wiper device (10) according to claim 1, characterized in that filter elements are switched between the switching means (50) and the first and/or second connection (42, 44).

15. Windshield wiper device (10) according to claim 1, characterized in that the temperature detection means (40) and the switching means (50) are embodied as one piece as a thermal switch (48).