Drive system for a vehicle accessory

• US 4,749,924 A
• Filed: 06/15/1987
• Issued: 06/07/1988
• Est. Priority Date: 06/27/1986
• Status: Expired due to Term

• Current Assignee: ASMO Company Limited 390 Umeda Kosai-Shi Shizuoka-Ken Japan, Nippondenso Company Limited 1-1 Showa-Cho Kariya-Shi Aichi Japan
• Original Assignee: ASMO Company Limited (DENSO Corporation), Nippondenso Co., Ltd. (DENSO Corporation)
• Inventors: Watanabe, Makoto, Kawashima, Isaku
• Primary Examiner(s): Ro, Bentsu
• Application Number:
  US07/062,778
• Time in Patent Office: 358 Days
• Field of Search: 318/255, 318/256, 318/264, 318/265, 318/266, 318/267, 318/280, 318/283, 318/286, 318/293, 318/294, 318/430, 318/434, 318/466, 318/467, 318/468, 318/469, 318/474, 307/10 R
• US Class Current: 318/474
• CPC Class Codes: E05F 15/41 Detection by monitoring transmitted force or torque E05F15/48 takes precedence; Safety couplings with activation dependent upon torque or force, e.g. slip couplings
• CPC Class Codes: E05F 15/695 Control circuits therefor
• CPC Class Codes: E05Y 2900/55 Windows
• CPC Class Codes: H01Q 1/103 Latching means; ensuring extension or retraction thereof
• CPC Class Codes: H02H 7/0851 for motors actuating a movable member between two end positions, e.g. detecting an end position or obstruction by overload signal
• CPC Class Codes: H02H 7/0859 avoiding restarting after fault condition has disappeared

Abstract

A motor serves to move a vehicle movable accessory. When the accessory is required to move, the motor is activated. Load on the motor is sensed. When the sensed load exceeds a reference level, the motor is deactivated. After the motor is deactivated, a device inhibits activation of the motor which induces movement of the accessory in a direction same as a direction of movement of the accessory during a period preceding the deactivation of the motor. The inhibition of activation of the motor is cancelled when the accessory is required to move in a direction different from a direction of movement of the accessory during a period preceding the deactivation of the motor.

Claims

1. A drive system for a vehicle accessory exposed to atmosphere and being movable between a first position and a second position, the system comprising:

(a) a rotatable motor connected to the accessory and moving the accessory toward the first position and the second position as the motor rotates in a first direction and a second direction respectively;

(b) means for generating a first operation signal when the accessory is required to move toward the first position;

(c) means for generating a second operation signal when the accessory is required to move toward the second position;

(d) means for sensing load on the motor;

(e) means for generating a stop signal when the sensed motor load exceeds a reference level;

(f) means for stopping the motor when the stop signal is generated;

(g) means for rotating the motor in the first direction when the first operation signal is generated;

(h) means for rotating the motor in the second direction when the second operation signal is generated;

(i) means for inhibiting rotation of the motor in the first direction in response to the stop signal generated after generation of the first operation signal; and

;

(j) means for cancelling the inhibition of rotation of the motor in the first direction in response to the second operation signal.

2. The drive system of claim 2 further comprising means for inhibiting rotation of the motor in the second direction in response to the stop signal generated after generation of the second operation signal, and means for cancelling the inhibition of rotation of the motor in the second direction in response to the first operation signal.

3. A drive system for a vehicle movable accessory comprising:

(a) means for moving the accessory;

(b) means for activating the moving means when the accessory is required to move;

(c) means for sensing load on the moving means;

(d) means for deactivating the moving means when the sensed load exceeds a reference level;

(e) means for, after the moving means is deactivated, inhibiting activation of the moving means which induces movement of the accessory in a direction same as a direction of movement of the accessory during a period preceding the deactivation of the moving means; and

(f) means for cancelling the inhibition of activation of the moving means when the accessory is required to move in a direction different from the direction of movement of the accessory during the period preceding the deactivation of the moving means.