US5039869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for switching a rear fog lamp on a vehicle
Assignee: Daimler Benz AG
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Filing: 1989-11-08
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Granted: 1991-08-13
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Expires: 2009-11-08
Abstract
Abstract A device for controllably switching a rear fog lamp on a vehicle utilizes a switch located in the current path to sense the current flow of a rear fog lamp of a trailer attached to the vehicle. In order to prevent disturbing reflections of the light of a vehicle rear fog lamp of the trailer into the vehicle interior via a front wall of the trailer, during the connection of a trailer rear fog lamp to the vehicle, the vehicle rear fog lamp is switched off automatically by means of the device, with the trailer rear fog lamp remaining intact.
Inventors
- 👤 Axel Willikens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:43
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/30; B60Q1/303
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
A device for controllably switching a vehicle rear fog lamp comprising: a vehicle rear fog lamp current path; a switch for actuating the vehicle rear fog lamp; a switch component which, when activated, interrupts the vehicle rear fog lamp current path; a line branched off from the vehicle rear fog lamp current path between the switch and the switch component; a circuit condition detector inserted in the line; an electronic amplifier having inputs coupled to the circuit condition detector in parallel and an output which is coupled to be an activating input of the switch component; and a free end of the line being equipped with a contact for the connection of a trailer rear fog lamp.
Claim 2
Independent Claim
117 words
A device for controllably switching a vehicle rear fog lamp comprising: a vehicle rear fog lamp current path; a switch for actuating the vehicle rear fog lamp; a switch component which, when activated, interrupts the vehicle rear fog lamp current path; a line branched off from the vehicle rear fog lamp current path between the switch and the switch component; a circuit condition detector inserted in the line; an electronic amplifier having inputs coupled to the circuit condition detector in parallel and an output which is coupled to be an activating input of the switch component; and a free end of the line being equipped with a contact for the connection of a trailer rear fog lamp.
Claim 3
Dependent Claim
22 words
A device according to claim 1, wherein the switch component is an electrical relay and the circuit condition detector is a resistor.
Claim 4
Dependent Claim
13 words
A device according to claim 1, wherein the switch component is a transistor.
Claim 5
Dependent Claim
16 words
A device according to claim 1, wherein the contact is integrated into a trailer plug socket.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |