The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 2008
Filed:
Oct. 06, 2005
John C. Cheng, City of Industry, CA (US);
Zhen Qiu Huang, City of Industry, CA (US);
John C. Cheng, City of Industry, CA (US);
Zhen Qiu Huang, City of Industry, CA (US);
Other;
Abstract
A vehicle-to-trailer light-connection verification tester () designed to be located within a towing vehicle (), a towed trailer () or within a cable adapter () that is connected between the vehicle () and the trailer (). The tester () features an electronics circuit () that includes a plug (P), a receptacle (J), a three-position mode switch (S), a plurality of isolation diodes (D-D), and a loudspeaker (LS). The mode switch (S) has a vehicle test position V, a trailer test position T, and a normal lighting position N. When the switch (S) is in the vehicle test position the rear vehicle lights are tested and when the switch (S) is in the trailer test position (T) the rear trailer lights are tested. If each light in either the vehicle () or the trailer () is operational the loudspeaker (LS) produces an audible sound. Conversely, if a particular light is not functioning no sound is heard. Thus, if there is a lighting problem a determination can be easily made if the problem is in the vehicle or in the trailer.