Electricity: motive power systems – Positional servo systems – With stabilizing features
Patent
1984-09-11
1986-04-29
Dobeck, B.
Electricity: motive power systems
Positional servo systems
With stabilizing features
318563, 318266, 318278, 318282, G05B 501
Patent
active
045859817
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.
REFERENCES:
patent: 4139811 (1979-02-01), Klinger
patent: 4153865 (1979-05-01), Cohen et al.
patent: 4220900 (1978-06-01), Mintz
patent: 4412162 (1983-10-01), Kitamura
patent: 4438972 (1984-03-01), Katayama et al.
patent: 4453112 (1984-06-01), Sauer et al.
Dobeck B.
Webasto-Werk W. Baier GmbH & Co.
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