Patent
   D342710
Priority
Jan 31 1989
Filed
Sep 16 1991
Issued
Dec 28 1993
Expiry
Dec 28 2007
Assg.orig
Entity
unknown
3
5
n/a
The ornamental design for a secondary trailer brake locking unit, as shown and described.

FIG. 1 is a front elevational view of the secondary trailer brake locking unit showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

Shelton, Horace D.

Patent Priority Assignee Title
D418098, Jan 23 1997 DICO, INC Enclosure for a trailer brake actuating unit
D424998, Apr 21 1998 Robert Bosch Corporation Combined relay-ATC valve
D494838, Feb 03 2003 Truck dashboard-mounted air brake lock
Patent Priority Assignee Title
2638118,
4640391, Jul 12 1982 Akebono Brake Industry Company, Ltd. Automatic stop valve device for vehicle brake systems
4793661, Aug 19 1986 ALERT-O-BRAKE SYSTEMS INC Tractor-trailer fluid pressure brake monitoring system
4804237, Apr 27 1987 Mid-America Commercialization Corporation Tractor-trailer brake control system
4824178, Aug 03 1985 WABCO Westinghouse Fahrzeugbremsen GmbH Fluid pressure responsive and electrically-controlled brake system
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