Device for driving motor-operated closure parts
First Claim
1. A device for driving a motor-operated closure part for an opening especially on a motor vehicle, having a protective circuit for interrupting a closing movement of the closure part when there is an indication that an object may be obstructing closure of the opening, wherein the protective circuit comprises a speed transmitting means for detecting a movement speed of the closure part within at least one range of a path of movement for the closure part that is critical with respect to an obstruction being encountered, and an evaluating stage that is responsive to at least one of a speed signal produced by the speed transmitting means and its rate of change with respect to time, for producing an obstruction signal that activates a control means acting to interrupt said closing movement.
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Accused Products
Abstract
A device for driving a motor-operated closure part for an opening, especially on a motor vehicle, having a protective circuit for interrupting the closing movement when there is an indication that an object may be obstructing closure of the opening. A speed transmitting means exists that detects the adjusting speed of the closing part on at least one range of the adjusting path of the closure part that is critical with respect to the engagement of an obstruction. In addition, an evaluating stage is provided that responds to the speed signal and/or its rate of change with respect to time, for producing an obstruction signal that activates a control means of the circuit to interrupt the closing movement.
38 Citations
20 Claims
- 1. A device for driving a motor-operated closure part for an opening especially on a motor vehicle, having a protective circuit for interrupting a closing movement of the closure part when there is an indication that an object may be obstructing closure of the opening, wherein the protective circuit comprises a speed transmitting means for detecting a movement speed of the closure part within at least one range of a path of movement for the closure part that is critical with respect to an obstruction being encountered, and an evaluating stage that is responsive to at least one of a speed signal produced by the speed transmitting means and its rate of change with respect to time, for producing an obstruction signal that activates a control means acting to interrupt said closing movement.
Specification