Claims
- 1. In an automotive vehicle, the improvement comprising:a) a drive train in which wear causes play to arise; b) a motor for driving the drive train, and having a lifetime which is definable into three periods: initial, middle, and final; c) brush means for delivering current to a rotor of the motor, and which causes motor speed to i) remain substantially constant during the initial period; ii) progressively decrease during the middle period; and iii) remain substantially constant during the final period.
- 2. Apparatus according to claim 4, wherein the drive train drives a windshield wiper.
- 3. Apparatus according to claim 1, wherein the drive train moves a seat within the vehicle.
- 4. In an automotive vehicle, the improvement comprising:a) a drive train in which wear causes play to arise; b) a motor for driving the drive train; c) brush means for delivering current to a rotor of the motor, and which causes motor speed to i) remain substantially constant during approximately the first 100 hours of operation; and ii) progressively decrease during approximately the next 100 hours of operation.
- 5. Improvement according to claim 4, in which the brush means causes motor speed to remain substantially constant after approximately 200 hours of operation.
- 6. Apparatus according to claim 6, wherein the drive train drives a windshield wiper.
- 7. Apparatus according to claim 4, wherein the drive train moves a seat within the vehicle.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of prior patent application Ser. No. 08/598,379, filed Feb. 8, 1996 now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (5)
Number |
Date |
Country |
2403432 |
Jul 1975 |
DE |
3819062 |
Dec 1989 |
DE |
813649 |
May 1959 |
GB |
3-71582 |
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Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
08/598379 |
Feb 1996 |
US |
Child |
08/964780 |
|
US |